CoderzHeaven

This is a simple post that helps you to do multiple selection in a ListView.

Check out previous posts for 3D animation in a Listview.

At first we will see the XML layout file.
This layout contains a gridview since we are dealing with it only.

grid_1.xml

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/myGrid"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:columnWidth="60dp"
    android:gravity="center"
    android:horizontalSpacing="10dp"
    android:numColumns="auto_fit"
    android:padding="10dp"
    android:stretchMode="columnWidth"
    android:verticalSpacing="10dp" />

Now the MainActivity that does all the work for the multiple selection in a ListView.

package com.coderzheaven.multipleselectiongrid;

import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Checkable;
import android.widget.FrameLayout;
import android.widget.GridView;
import android.widget.ImageView;

public class MainActivity extends Activity {

	GridView mGrid;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		loadApps();

		setContentView(R.layout.grid_1);
		mGrid = (GridView) findViewById(R.id.myGrid);
		mGrid.setAdapter(new AppsAdapter());
		mGrid.setChoiceMode(GridView.CHOICE_MODE_MULTIPLE_MODAL);
		mGrid.setMultiChoiceModeListener(new MultiChoiceModeListener());
	}

	private List<ResolveInfo> mApps;

	private void loadApps() {
		Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
		mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);

		mApps = getPackageManager().queryIntentActivities(mainIntent, 0);
	}

	public class AppsAdapter extends BaseAdapter {
		public AppsAdapter() {
		}

		public View getView(int position, View convertView, ViewGroup parent) {
			CheckableLayout l;
			ImageView i;

			if (convertView == null) {
				i = new ImageView(MainActivity.this);
				i.setScaleType(ImageView.ScaleType.FIT_CENTER);
				i.setLayoutParams(new ViewGroup.LayoutParams(50, 50));
				l = new CheckableLayout(MainActivity.this);
				l.setLayoutParams(new GridView.LayoutParams(
						GridView.LayoutParams.WRAP_CONTENT,
						GridView.LayoutParams.WRAP_CONTENT));
				l.addView(i);
			} else {
				l = (CheckableLayout) convertView;
				i = (ImageView) l.getChildAt(0);
			}

			ResolveInfo info = mApps.get(position);
			i.setImageDrawable(info.activityInfo.loadIcon(getPackageManager()));

			return l;
		}

		public final int getCount() {
			return mApps.size();
		}

		public final Object getItem(int position) {
			return mApps.get(position);
		}

		public final long getItemId(int position) {
			return position;
		}
	}

	public class CheckableLayout extends FrameLayout implements Checkable {
		private boolean mChecked;

		public CheckableLayout(Context context) {
			super(context);
		}

		@SuppressWarnings("deprecation")
		public void setChecked(boolean checked) {
			mChecked = checked;
			setBackgroundDrawable(checked ? getResources().getDrawable(
					R.drawable.blue) : null);
		}

		public boolean isChecked() {
			return mChecked;
		}

		public void toggle() {
			setChecked(!mChecked);
		}

	}

	public class MultiChoiceModeListener implements
			GridView.MultiChoiceModeListener {
		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
			mode.setTitle("Select Items");
			mode.setSubtitle("One item selected");
			return true;
		}

		public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
			return true;
		}

		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
			return true;
		}

		public void onDestroyActionMode(ActionMode mode) {
		}

		public void onItemCheckedStateChanged(ActionMode mode, int position,
				long id, boolean checked) {
			int selectCount = mGrid.getCheckedItemCount();
			switch (selectCount) {
			case 1:
				mode.setSubtitle("One item selected");
				break;
			default:
				mode.setSubtitle("" + selectCount + " items selected");
				break;
			}
		}

	}
}

You don’t have have to change anything in the manifest for this to work.
Now go on and run it.

You can download the complete sample code for the above post from here.

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I have already shown another example of creating custom spinner in android in this post.
That was by extending the ArrayAdapter class, Now it’s using the baseAdapter class.

You all knew that a spinner or combobox is an inbuilt widget in android. And Like any other widgets spinners are also customizable.
Here is a simple example to customize a spinner. First we will look at the java code.
The getView method is called for each row in the spinner. So with the help of an Layout Inflater you can inflate any layout for each row.
At extreme you can have each layout for each row.

Check these older posts about spinner.

1. How to get a selected Item from a spinner in ANDROID?

2. How to set an item selected in Spinner in ANDROID?

3. How to create a custom ListView in android?
4. Customizing a spinner in android.

Check out these of ListViews

1. Simplest Lazy Loading ListView Example in Android with data populated from a MySQL database using php.

2. How to add checkboxes and radio buttons to ListView in android? OR How to set single choice items in a ListView in android?

Ok We will start.
These are the layouts.

Activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Spinner
        android:id="@+id/spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:drawSelectorOnTop="true"
        android:prompt="@string/prompt" />

</LinearLayout>

Now this is the layout for each row in the spinner.
row.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="3dip" >

    <ImageView
        android:id="@+id/image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/company"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dip"
        android:layout_marginTop="2dip"
        android:layout_toRightOf="@+id/image"
        android:padding="3dip"
        android:text="CoderzHeaven"
        android:textColor="@drawable/red"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/sub"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/company"
        android:layout_marginLeft="5dip"
        android:layout_toRightOf="@+id/image"
        android:padding="2dip"
        android:text="Sub "
        android:textColor="@drawable/darkgrey" />

</RelativeLayout>

Now the object which we are placing in each row in the Spinner.
ListObject.java

package com.coderzheaven.customspinner;

public class ListObject {

	String company, sub;
	int image_id;

	public String getCompany() {
		return company;
	}

	public void setCompany(String company) {
		this.company = company;
	}

	public String getSub() {
		return sub;
	}

	public void setSub(String sub) {
		this.sub = sub;
	}

	public int getImage_id() {
		return image_id;
	}

	public void setImage_id(int image_id) {
		this.image_id = image_id;
	}

	public void setAll(int img_id, String title, String sub) {
		setImage_id(img_id);
		setCompany(title);
		setSub(sub);
	}
}

Now the Adapter class that creates each row for the spinner.
MyAdapter.java

package com.coderzheaven.customspinner;

import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class MyAdapter extends BaseAdapter {

	Context c;
	ArrayList<ListObject> objects;

	public MyAdapter(Context context, ArrayList<ListObject> objects) {
		super();
		this.c = context;
		this.objects = objects;
	}

	@Override
	public int getCount() {
		return objects.size();
	}

	@Override
	public Object getItem(int position) {
		return objects.get(position);
	}

	@Override
	public long getItemId(int position) {
		return 0;
	}

	public View getView(int position, View convertView, ViewGroup parent) {

		ListObject cur_obj = objects.get(position);
		LayoutInflater inflater = ((Activity) c).getLayoutInflater();
		View row = inflater.inflate(R.layout.row, parent, false);
		TextView label = (TextView) row.findViewById(R.id.company);
		label.setText(cur_obj.getCompany());
		TextView sub = (TextView) row.findViewById(R.id.sub);
		sub.setText(cur_obj.getSub());
		ImageView icon = (ImageView) row.findViewById(R.id.image);
		icon.setImageResource(cur_obj.getImage_id());

		return row;
	}
}

Now the activity that ads the spinner and set the values.
MainActivity.java

package com.coderzheaven.customspinner;

import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Spinner;

public class MainActivity extends Activity {

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		String[] strings = { "CoderzHeaven", "Google", "Microsoft", "Apple",
				"Yahoo", "Samsung" };
		ArrayList<ListObject> objects = new ArrayList<ListObject>();
		for (int k = 0; k < strings.length; k++) {
			ListObject obj = new ListObject();
			obj.setAll(R.drawable.ic_launcher, strings[k], "Sub title");
			objects.add(obj);
		}

		Spinner mySpinner = (Spinner) findViewById(R.id.spinner);
		mySpinner.setAdapter(new MyAdapter(this, objects));
	}

}

And at last the manifest file. You may not need it .
AndroidManifest.xml.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.coderzheaven.customspinner"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.coderzheaven.customspinner.MainActivity"
            android:label="Custom Spinner" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Here is a simple example showing how to load a database values in a spinner in android.

OK we will start.

This is the layout for the spinner row.
spinner_row.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation     =      "vertical"
    android:id="@+id/tv"
    android:layout_margin="10dp">   
</TextView>

This is the layout for the interface.

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:textStyle="bold"
        android:text="Load DB values into Spinner"
         >
    </TextView>

    <Spinner
        android:id="@+id/spinner1"
        android:layout_below="@+id/tv"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" />

</LinearLayout>

Now this is the MainActivity.java file that uses the spinner and the database.

package com.coderzheaven.loadspinnerfromdb;

import   java  .util  .ArrayList;

import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends Activity {

	SQLiteDatabase mydb;
	private   static String DBNAME = "PERSONS.db";
	private static String TABLE = "MY_TABLE";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		createTable();
		insertIntoTable();

		ArrayList<String> my_array = new ArrayList<String>();
		my_array = getTableValues();

		Spinner My_spinner = (Spinner) findViewById(R.id.spinner1);
		ArrayAdapter my_Adapter = new ArrayAdapter(this, R.layout.spinner_row,
				my_array);
		My_spinner.setAdapter(my_Adapter);
	}

	// CREATE TABLE IF NOT EXISTS
	public void createTable() {
		try {
			mydb = openOrCreateDatabase(DBNAME, Context.MODE_PRIVATE, null);
			mydb.execSQL("CREATE TABLE IF  NOT EXISTS " + TABLE
					+ " (ID INTEGER PRIMARY KEY, NAME TEXT, PLACE TEXT);");
			mydb.close();
		} catch (Exception e) {
			Toast.makeText(getApplicationContext(), "Error in creating table",
					Toast.LENGTH_LONG);
		}
	}

	// THIS FUNCTION INSERTS DATA TO THE DATABASE
	public void insertIntoTable() {
		try {
			mydb = openOrCreateDatabase(DBNAME, Context.MODE_PRIVATE, null);
			mydb.execSQL("INSERT INTO " + TABLE
					+ "(NAME, PLACE) VALUES('CODERZHEAVEN','GREAT INDIA')");
			mydb.execSQL("INSERT INTO " + TABLE
					+ "(NAME, PLACE) VALUES('ANTHONY','USA')");
			mydb.execSQL("INSERT INTO " + TABLE
					+ "(NAME, PLACE) VALUES('SHUING','JAPAN')");
			mydb.execSQL("INSERT INTO " + TABLE
					+ "(NAME, PLACE) VALUES('JAMES','INDIA')");
			mydb.execSQL("INSERT INTO " + TABLE
					+ "(NAME, PLACE) VALUES('SOORYA','INDIA')");
			mydb.execSQL("INSERT INTO " + TABLE
					+ "(NAME, PLACE) VALUES('MALIK','INDIA')");
			mydb.close();
		} catch (Exception e) {
			Toast.makeText(getApplicationContext(),
					"Error in inserting into table", Toast.LENGTH_LONG);
		}
	}

	// THIS FUNCTION SHOWS DATA FROM THE DATABASE
	public ArrayList<String> getTableValues() {

		ArrayList<String> my_array = new ArrayList<String>();
		try {
			mydb = openOrCreateDatabase(DBNAME, Context.MODE_PRIVATE, null);
			Cursor allrows = mydb.rawQuery("SELECT * FROM " + TABLE, null);
			System.out.println("COUNT : " + allrows.getCount());

			if (allrows.moveToFirst()) {
				do {

					String ID = allrows.getString(0);
					String NAME = allrows.getString(1);
					String PLACE = allrows.getString(2);
					my_array.add(NAME);

				} while (allrows.moveToNext());
			}
			allrows.close();
			mydb.close();
		} catch (Exception e) {
			Toast.makeText(getApplicationContext(), "Error encountered.",
					Toast.LENGTH_LONG);
		}
		return my_array;
	}

}

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Note : Please remove the “span” tags from the post when you copy it.

Download the complete source code for this example from here.

I have already shown some examples with ActionBar.
This is the example showing how to start with ActionBar in android.

1. Android removes the need of Menu button from devices with ActionBar.

2. How to start with ActionBar in Android?

3. Dynamically Adding, Removing, Toggling and Removing all ActionBar Tabs in Android – Part 2?

Now today I will show you another example in which we will put a searchbar along with other buttons in the ActionBar and Listen to the search and Listen to the button select.

This is how we do this.

Take a look at the screenshot.

First in your project “res” folder create a folder named “menu”. the create an xml inside this folder named “actions.xml”.
Now copy these to this xml.

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/action_search"
          android:icon="@android:drawable/ic_menu_search"
          android:title="Action Bar Search"
          android:showAsAction="ifRoom"
          android:actionViewClass="android.widget.SearchView" />
    <item android:id="@+id/action_add"
          android:icon="@android:drawable/ic_menu_add"
          android:title="Action Bar Add" />
    <item android:id="@+id/action_edit"
          android:icon="@android:drawable/ic_menu_edit"
          android:showAsAction="always"
          android:title="Action Bar Edit" />
    <item android:id="@+id/action_share"
          android:icon="@android:drawable/ic_menu_share"
          android:title="Action Bar Share"
          android:showAsAction="ifRoom" />
</menu>

OK now we go to the java code. In your Activity file copy this code.

package com.coderzheaven.actionbarsearch;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.SearchView;
import android.widget.SearchView.OnQueryTextListener;
import android.widget.TextView;
import android.widget.Toast;

public class ActionBarWithSearch extends Activity  implements OnQueryTextListener {
    TextView mSearchText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mSearchText = new TextView(this);
        mSearchText.setPadding(10, 10, 10, 10);
        mSearchText.setText("Action Bar Usage example from CoderzHeaven");
        setContentView(mSearchText);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.actions, menu);
        SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
        searchView.setOnQueryTextListener(this);
        return true;
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    public boolean    onOptionsItemSelected       (MenuItem item) {
        Toast.makeText(this, "Selected Item: " + item.getTitle(), Toast.LENGTH_SHORT).show();
        return true;
    }

    // The following callbacks are called for the SearchView.OnQueryChangeListener
    public boolean onQueryTextChange(String newText) {
        newText = newText.isEmpty() ? "" : "Query so far: " + newText;
        mSearchText.setText(newText);
        mSearchText.setTextColor(Color.GREEN);
        return true;
    }

    public boolean      onQueryTextSubmit      (String query) {
        //Toast.makeText(this, "Searching for: " + query + "...", Toast.LENGTH_SHORT).show();
        mSearchText.setText("Searching for: " + query + "...");
        mSearchText.setTextColor(Color.RED);
        return true;
    }
}

Here “onQueryTextChange” function Listens to the search textbox when we type and “onQueryTextSubmit” function Listens when we hit search in the keyboard.

PLease leave your comments.

Hi all..

In today’s post I will show you how to add actionbar tabs dynamically, remove one by one , hide and unhide them, removing all tabs at once etc.

This simple java code does that.

First create a project and in the MainActivity, paste this.

package com.coderzheaven.actionbartabs;

import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.action_bar_tabs); 
    }

    public void onAddTab(View v) {
        final ActionBar bar = getActionBar();
        final int tabCount = bar.getTabCount();
        final String text = "Tab " + tabCount;
        bar.addTab(bar.newTab()
                .setText(text)
                .setTabListener(new TabListener(new TabContentFragment(text))));
    }

    public void onRemoveTab(View v) {
        final ActionBar bar = getActionBar();
        if(bar.getTabCount() > 0)
        	bar.removeTabAt(bar.getTabCount() - 1);
    }

    public void onToggleTabs(View v) {
        final ActionBar bar = getActionBar();

        if (bar.getNavigationMode() == ActionBar.NAVIGATION_MODE_TABS) {
            bar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
            bar.setDisplayOptions(ActionBar.DISPLAY_SHOW_TITLE, ActionBar.DISPLAY_SHOW_TITLE);
        } else {
            bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
            bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);
        }
    }

    public void onRemoveAllTabs(View v) {
        getActionBar().removeAllTabs();
    }

    /**
     * A TabListener receives event callbacks from the action bar as tabs
     * are deselected, selected, and reselected. 
     **/
    private class TabListener implements ActionBar.TabListener {
        private TabContentFragment mFragment;

        public TabListener(TabContentFragment fragment) {
            mFragment = fragment;
        }

        public void onTabSelected(Tab tab, FragmentTransaction ft) {
            ft.add(R.id.fragment_content, mFragment, mFragment.getText());
        }

        public void onTabUnselected(Tab tab, FragmentTransaction ft) {
            ft.remove(mFragment);
        }

        public void onTabReselected(Tab tab, FragmentTransaction ft) {
            Toast.makeText(MainActivity.this, "Reselected!", Toast.LENGTH_SHORT).show();
        }
    }

    private class TabContentFragment extends Fragment {
        private String mText;

        public TabContentFragment(String text) {
            mText = text;
        }

        public String getText() {
            return mText;
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View fragView = inflater.inflate(R.layout.action_bar_tab_content, container, false);

            TextView text = (TextView) fragView.findViewById(R.id.text);
            text.setText(mText);

            return fragView;
        }
    }
}

You may be getting many errors, we will be resolving all that in just a few minutes.

Now create an xml named “action_bar_tabs.xml” inside the res/layout folder and copy this code into it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">
    <FrameLayout android:id="@+id/fragment_content"
                 android:layout_width="match_parent"
                 android:layout_height="0dip"
                 android:layout_weight="1" />
    <LinearLayout android:layout_width="match_parent"
                  android:layout_height="0dip"
                  android:layout_weight="1"
                  android:orientation="vertical">
        <Button android:id="@+id/btn_add_tab"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Add Tab"
                android:onClick="onAddTab" />
        <Button android:id="@+id/btn_remove_tab"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Remove Tab"
                android:onClick="onRemoveTab" />
        <Button android:id="@+id/btn_toggle_tabs"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Toggle Tabs"
                android:onClick="onToggleTabs" />
        <Button android:id="@+id/btn_remove_all_tabs"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Remove All Tabs"
                android:onClick="onRemoveAllTabs" />
    </LinearLayout>
</LinearLayout>

Now create another xml for the tab content and named it “action_bar_tab_content.xml” and copy this code into it.

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
          android:id="@+id/text"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" />

OK Done. Go on and run it.

Download Source code from here

.

Please leave your valuable comments now

This sample application does that.

First create an xml for your notification.

custom_notification.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dp" >
    <ImageView android:id="@+id/image"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_alignParentLeft="true"
        android:layout_marginRight="10dp" />
    <TextView android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/image"
        style="Custom Notification Title" />
    <TextView android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/image"
        android:layout_below="@id/title"
        style="Custom Notification Text" />
</RelativeLayout>

Now the java code.

package com.coderzheaven.customnotification;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.widget.RemoteViews;

public class MainActivity extends Activity {

    @SuppressWarnings("deprecation")
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        int icon = R.drawable.ic_launcher;
        long when = System.currentTimeMillis();
        Notification notification = new Notification(icon, "Custom Notification", when);

    	NotificationManager mNotificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
    	
        RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.custom_notification);
        contentView.setImageViewResource(R.id.image, R.drawable.ic_launcher);
        contentView.setTextViewText(R.id.title, "Custom notification");
        contentView.setTextViewText(R.id.text, "This is a custom layout");
        notification.contentView = contentView;
        
        Intent notificationIntent = new Intent(this, MainActivity.class);
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
        notification.contentIntent = contentIntent;
        
        notification.flags |= Notification.FLAG_NO_CLEAR; //Do not clear the notification
        notification.defaults |= Notification.DEFAULT_LIGHTS; // LED
        notification.defaults |= Notification.DEFAULT_VIBRATE; //Vibration
        notification.defaults |= Notification.DEFAULT_SOUND; // Sound
        
        mNotificationManager.notify(1, notification);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

OK At first we will create the XML that contains a TextView.

marqueetext.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

   <TextView
    android:text="Really Long Scrolling Text Goes Here.... ..... ............ .... ...."
    android:singleLine="true"
    android:ellipsize="marquee"
    android:marqueeRepeatLimit="marquee_forever"
    android:scrollHorizontally="true"
    android:id="@+id/TextView03"
    android:padding="5dip" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" />
   
</RelativeLayout>

Now the java code

package com.example.marqueetext;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TextView;

public class Marqueetext extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.marqueetext);
        
        TextView tv = (TextView) this.findViewById(R.id.TextView03);  
        tv.setSelected(true);  // Set focus to the textview
        
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.marqueetext, menu);
        return true;
    }
}

Note : The XMl alone will not create the marquee. For that the most important thing is to do this in java code.

 tv.setSelected(true);  // Set focus to the textview

Now run the project and see the result.

Here is a complete example of How to read and write files to SDCARD and application SandBox in Android.

First create a new project and inside the mainActivity paste this code.

package com.coderzheaven.filesexample;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

	EditText edittext;
	Button b1, b2, b3, b4;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        edittext = (EditText)findViewById(R.id.ed);
        edittext.setLines(10);
        b1 = (Button)findViewById(R.id.button1);
        b2 = (Button)findViewById(R.id.button2);
        b3 = (Button)findViewById(R.id.button3);
        b4 = (Button)findViewById(R.id.button4);
        
        b1.setOnClickListener(this);
        b2.setOnClickListener(this);
        b3.setOnClickListener(this);
        b4.setOnClickListener(this);        
        
    }
	@Override
	public void onClick(View v) {
		int id = v.getId();
		MyFile file = new MyFile(v.getContext());
		
		switch(id){
			case R.id.button1:
				if(!edittext.getText().toString().trim().equals("")){
					file.writeToSD(edittext.getText().toString());
				}else{
					Toast.makeText(v.getContext(), "Please enter some contents for the file", Toast.LENGTH_LONG).show();
				}
				break;
				
			case R.id.button2:
				edittext.setText(file.readFromSD());
				break;
			
			case R.id.button3:
				if(!edittext.getText().toString().trim().equals("")){
					file.writeToSandBox(edittext.getText().toString());
				}else{
					Toast.makeText(v.getContext(), "Please enter some contents for the file", Toast.LENGTH_LONG).show();
				}
				break;
				
			case R.id.button4:
				edittext.setText(file.readFromSandBox());
				break;
		}
		
		
		
	}

}

Now create another class named MyFile.java and copy this code into it.

package com.coderzheaven.filesexample;

import java.io. BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Environment;
import android.util.Log;

public class MyFile {

	String TAG = "MyFile";
	Context context;
	public MyFile(Context context){
		this.context = context;
	}
	
	public Boolean writeToSD(String text){
		Boolean write_successful = false;
		 File root=null;  
	        try {  
	            // check for SDcard   
	            root = Environment.getExternalStorageDirectory();  
	            Log.i(TAG,"path.." +root.getAbsolutePath());  
	  
	            //check sdcard permission  
	            if (root.canWrite()){  
	                File fileDir = new File(root.getAbsolutePath());  
	                fileDir.mkdirs();  
	  
	                File file= new File(fileDir, "samplefile.txt");  
	                FileWriter filewriter = new FileWriter(file);  
	                BufferedWriter out = new BufferedWriter(filewriter);  
	                out.write(text);  
	                out.close();  
	                write_successful = true;
	            }  
	        } catch (IOException e) {  
	            Log.e("ERROR:---", "Could not write file to SDCard" + e.getMessage());  
	            write_successful = false;
	        }  
		return write_successful;
	}
	
	public String readFromSD(){
		File sdcard = Environment.getExternalStorageDirectory();
		File file = new File(sdcard,"samplefile.txt");
		StringBuilder text = new StringBuilder();
		try {
		    BufferedReader br = new BufferedReader(new FileReader(file));
		    String line;
		    while ((line = br.readLine()) != null) {
		        text.append(line);
		        text.append('\n');
		    }
		}
		catch (IOException e) {
		}
		return text.toString();
	}

	@SuppressLint("WorldReadableFiles")
	@SuppressWarnings("static-access")
	public Boolean writeToSandBox(String text){
		Boolean write_successful = false;
		try{
			FileOutputStream fOut = context.openFileOutput("samplefile.txt",
					context.MODE_WORLD_READABLE);
			OutputStreamWriter osw = new OutputStreamWriter(fOut); 
			osw.write(text);
			osw.flush();
			osw.close();
		}catch(Exception e){
			write_successful = false;
		}
		return write_successful;
	}
	public String readFromSandBox(){
		String str ="";
		String new_str = "";
		try{
			FileInputStream fIn = context.openFileInput("samplefile.txt");
            InputStreamReader isr = new InputStreamReader(fIn);
            BufferedReader br=new BufferedReader(isr);
           
			while((str=br.readLine())!=null)
            {
				new_str +=str;
				System.out.println(new_str);
            }            
		}catch(Exception e)
		{			
		}
		return new_str;
	}
}

Now the layout for the xml file.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/ed"
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
		android:lines="5" android:gravity="top|left" android:inputType="textMultiLine"
		android:scrollHorizontally="false" 
		android:minWidth="10.0dip"
		android:maxWidth="5.0dip"
        android:layout_weight="1"/>


    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Write File to SDCARD" />
    
    <Button
        android:id="@+id/button2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Read File from SDCARD" />
    
    <Button
        android:id="@+id/button3"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Write File to Application SandBox" />
    
    <Button
        android:id="@+id/button4"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Read File from Application SandBox" />

</LinearLayout>

Note you should give this permission in the AndroidManifest file.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

OK Done. Now run the project.

To view the files

1. To see the SDCARD
Open File explorer -> expand sdcard (or mnt/sdcard).
2. To see the Application SANDBOX
Open File explorer -> expand data/data/your_package_name/files.

.

Please leave your valuable comments on this post.

Join the Forum discussion on this post

In android for each time picker Dialog we can associate with a dialog. So with this dialog and a global variable we can have any number of Dialog listeners. Here is the sample java code.

This is the layout file – main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btnChangeDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Change Date" />
    
     <Button
        android:id="@+id/btnChangeDate2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Change Date2" />

    <TextView
        android:id="@+id/lblDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Current Date (M-D-YYYY): "
        android:textAppearance="?android:attr/textAppearanceLarge" />
  
    <TextView
        android:id="@+id/tvDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceLarge" />
    
     <TextView
        android:id="@+id/tvDate2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>

MyAndroidAppActivity .java

import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;

public class MyAndroidAppActivity extends Activity {

	private TextView tvDisplayDate, tvDisplayDate2;
	private DatePicker dpResult;
	private Button btnChangeDate, btnChangeDate2;

	private int year;
	private int month;
	private int day;

	static final int DATE_DIALOG_ID = 1;
	static final int DATE_DIALOG_ID2 = 2;
	int cur = 0;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		setCurrentDateOnView();
		addListenerOnButton();

	}

	// display current date
	public void setCurrentDateOnView() {

		tvDisplayDate = (TextView) findViewById(R.id.tvDate);
		tvDisplayDate2 = (TextView) findViewById(R.id.tvDate2);

		final Calendar c = Calendar.getInstance();
		year = c.get(Calendar.YEAR);
		month = c.get(Calendar.MONTH);
		day = c.get(Calendar.DAY_OF_MONTH);

		// set current date into textview
		tvDisplayDate.setText(new StringBuilder()
				// Month is 0 based, just add 1
				.append(month + 1).append("-").append(day).append("-")
				.append(year).append(" "));

		tvDisplayDate2.setText(tvDisplayDate.getText().toString());
	}

	public void addListenerOnButton() {

		btnChangeDate = (Button) findViewById(R.id.btnChangeDate);

		btnChangeDate.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {

				showDialog(DATE_DIALOG_ID);

			}

		});
		btnChangeDate2 = (Button) findViewById(R.id.btnChangeDate2);

		btnChangeDate2.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				
				showDialog(DATE_DIALOG_ID2);

			}

		});

	}

	@Override
	protected Dialog onCreateDialog(int id) {
		switch (id) {
		
		case DATE_DIALOG_ID:
			System.out.println("onCreateDialog  : " + id);
			cur = DATE_DIALOG_ID;
			// set date picker as current date
			return new DatePickerDialog(this, datePickerListener, year, month,
					day);
		case DATE_DIALOG_ID2:
			cur = DATE_DIALOG_ID2;
			System.out.println("onCreateDialog2  : " + id);
			// set date picker as current date
			return new DatePickerDialog(this, datePickerListener, year, month,
					day);
		
		}
		return null;
	}

	private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {

		// when dialog box is closed, below method will be called.
		public void onDateSet(DatePicker view, int selectedYear,
				int selectedMonth, int selectedDay) {
			
			year = selectedYear;
			month = selectedMonth;
			day = selectedDay;

			if(cur == DATE_DIALOG_ID){
				// set selected date into textview
				tvDisplayDate.setText("Date1 : " + new StringBuilder().append(month + 1)
						.append("-").append(day).append("-").append(year)
						.append(" "));
			}
			else{
				tvDisplayDate2.setText("Date2 : " + new StringBuilder().append(month + 1)
						.append("-").append(day).append("-").append(year)
						.append(" "));
			}

		}
	};

}

Please leave your valuable comments on this post.

With Android 3.0 Google eliminated the need of hardware menu button which is replaced by Action Bars.

Here is a quick example on how to use ActionBars.

First create a new project and name it ActionBarExample.

Now create a folder named “menu” in res folder and create a new XML file inside it named “action_bar_menu.xml”.

action_bar_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:id="@+id/menuitem1" android:showAsAction="ifRoom" android:title="Test1"></item>
    <item android:id="@+id/menuitem2" android:showAsAction="ifRoom" android:title="Test2"></item>
</menu>

Now the java code for implementing this ActionBar.

MainActivity.java

package com.example.actionbarexample;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends Activity {
	@Override
	  public void onCreate(Bundle savedInstanceState) {   
	    super.onCreate(savedInstanceState);
	    setContentView(R.layout.activity_main);
	  }

	  @Override
	  public boolean onCreateOptionsMenu(Menu menu) {
	    MenuInflater inflater = getMenuInflater();
	    inflater.inflate(R.menu.action_bar_menu, menu);
	    return true;
	  }

	  @Override
	  public boolean    onOptionsItemSelected(MenuItem item) {
	    switch (item.getItemId()) {
	    case R.id.menuitem1:
	      Toast.makeText(this, "Test 1 Clicked", Toast.LENGTH_SHORT).show();
	      break;
	    case R.id.menuitem2:
	      Toast.makeText(this, "Test 2 Clicked", Toast.LENGTH_SHORT).show();
	      break;

	    default:
	      break;
	    }

	    return true;
	  }
	} 

As there is enough space in the ActionBar otherwise you may see the Overflow menu or you have to use the Option menu button on your phone.

Please leave your comments om this post.

This is a simple example to how to stream an audio in android.

Here is the java code for that.

package com.coderzheaven.pack;

import android.app.Activity;
import android.app.ProgressDialog;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class StreamAudioDemo extends Activity implements OnClickListener,
OnPreparedListener, OnErrorListener, OnCompletionListener {

    MediaPlayer mp;
    ProgressDialog pd;
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button bt = (Button)findViewById(R.id.play);
    bt.setOnClickListener(this);
}

   @Override
   public void onPrepared(MediaPlayer mp) {
       Log.i("StreamAudioDemo", "prepare finished");
       pd.setMessage("Playing.....");
       mp.start();
  }

  @Override
  public void onClick(View v) {
       try
        {
    	    pd = new ProgressDialog(this);
    	    pd.setMessage("Buffering.....");
    	    pd.show();
            mp = new MediaPlayer();
            mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mp.setOnPreparedListener(this);
            mp.setOnErrorListener(this);
            mp.setDataSource("http://www.robtowns.com/music/blind_willie.mp3");
            mp.prepareAsync();
            mp.setOnCompletionListener(this);
        }
        catch(Exception e)
        {
            Log.e("StreamAudioDemo", e.getMessage());
        }
  	}

  	@Override
  	public boolean onError(MediaPlayer mp, int what, int extra) {
      pd.dismiss();
      return false;
  	}

	@Override
	public void onCompletion(MediaPlayer mp) {
		pd.dismiss();
		Toast.makeText(getApplicationContext(), "Completed", Toast.LENGTH_LONG).show();		
	}
}

This is the xml that contains the button.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Stream Audio and Play"
    android:id="@+id/play"
    />
</LinearLayout>

When you run this program you will see a button and on clicking on that button you will see a dialog with message “Buffering…..”. Once the buffering is complete the audio will be start playing.

Please leave your valuable comments on this post.

This is really simple in android. TextViews has a property called “lineSpacingExtra” which you can change to set the line spacing.

   <TextView 
           android:text="Data" 
		  	android:id="@+id/textview" 
		  	android:layout_gravity="top"
		  	android:gravity="left"
		  	android:layout_width="fill_parent" 
		  	android:layout_height="wrap_content"
		  	android:layout_centerVertical="true"
		  	android:layout_margin="5dp"
		  	android:padding="5dp"
		  	android:textSize="20sp"
		  	android:lineSpacingExtra="10dp">
		  </TextView>

OR

you can call

textView.setLineSpacing()

in the java code itself.

We all know how to add a new contact to our android devices without programming right.
OK that’s a normal man’s use.
But what from a programmer’s view.

This is the sample java code that helps you to add contact programatically.

package com.coderzheaven.pack;

import java.util.ArrayList;

import android.app.Activity;
import android.content.ContentProviderOperation;
import android.content.ContentValues;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.Contacts.People;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.widget.Toast;

public class AddContactDemo extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        addContact("Coderz","1234567890");
        addContact("James","5656215521");
        addContact("John","4545454545");
        addContact("Mary","9632587410");
        addContact("Peter","4561237890");
    }
   private void addContact(String name, String phone) {
        ContentValues values = new ContentValues();
        values.put(People.NUMBER, phone);
        values.put(People.TYPE, Phone.TYPE_CUSTOM);
        values.put(People.LABEL, name);
        values.put(People.NAME, name);
        Uri dataUri = getContentResolver().insert(People.CONTENT_URI, values);
        Uri updateUri = Uri.withAppendedPath(dataUri, People.Phones.CONTENT_DIRECTORY);
        values.clear();
        values.put(People.Phones.TYPE, People.TYPE_MOBILE);
        values.put(People.NUMBER, phone);
        updateUri = getContentResolver().insert(updateUri, values);
      }
}

After running this programs please switch to contacts application on your device to see the result.

Please leave your comments and also share it if you like it.

Hello everyone…

In this post I will show you how to listen to hardware button in an android smartphone.

This post especially shows how to listen to the home button in android. But my advice is never override the home button in your app.
Home button is to move the currently running process to background. But you can override the Backbutton and other buttons, android allows that on the keyDown Method. But if you try to match the “Home” button in the keyDown method it will not work. For that we have to follow another way which is shown in this post.

This simple java code handles the button pressed.

package test.test;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.WindowManager;

public class Test2Activity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_HOME)) {
        	System.out.println("KEYCODE_HOME");
        	showDialog("'HOME'");
            return true;
        }
        if ((keyCode == KeyEvent.KEYCODE_BACK)) {
        	System.out.println("KEYCODE_BACK");
        	showDialog("'BACK'");
            return true;
        }
        if ((keyCode == KeyEvent.KEYCODE_MENU)) {
        	System.out.println("KEYCODE_MENU");
        	showDialog("'MENU'");
            return true;
        }
        return false;
    }
    
    void showDialog(String the_key){
    	AlertDialog.Builder builder = new AlertDialog.Builder(this);
    	builder.setMessage("You have pressed the " + the_key + " button. Would you like to exit the app?")
    		  .setCancelable(true)
    	       .setPositiveButton("OK", new DialogInterface.OnClickListener() {
    	           public void onClick(DialogInterface dialog, int id) {
    	        	   dialog.cancel();
    	        	   finish();
    	           }
    	       })
    	       .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
    	           public void onClick(DialogInterface dialog, int id) {
    	                dialog.cancel();
    	           }
    	       });
    	AlertDialog alert = builder.create();
    	alert.setTitle("CoderzHeaven.");
    	alert.show();
    }
    
    @Override
    public void onAttachedToWindow() {
        super.onAttachedToWindow();
        this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);           
    }
    
    public void onUserLeaveHint() { // this only executes when Home is selected.
    	// do stuff
    	super.onUserLeaveHint();
    	System.out.println("HOMEEEEEEEEE");
    }
}

When “onUserLeaveHint()” function is defined you can actually listen to the home button press and do some saving of data or something.

 public void onUserLeaveHint() { // this only executes when Home is selected.
    	// do stuff
    	super.onUserLeaveHint();
    	System.out.println("HOMEEEEEEEEE");
    }

Please leave your comments on this post and share it on the social Networks.

This is a simple post showing how to use accelerometer in android.

This java code prints the values of x,y and z axis in the console.

package com.coderzheaven.pack;

import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;

public class AccelerometerTest extends Activity  implements SensorEventListener{
	 private SensorManager sensorManager;
	 double ax,ay,az;   // these are the acceleration in x,y and z axis

    @Override
    public void onCreate(Bundle savedInstanceState) {
    	 super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         sensorManager=(SensorManager) getSystemService(SENSOR_SERVICE);
         sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
    }
    @Override
    public void onAccuracyChanged(Sensor arg0, int arg1) {
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
         if (event.sensor.getType()==Sensor.TYPE_ACCELEROMETER){
             		 ax=event.values[0];
                     ay=event.values[1];
                     az=event.values[2];
                     System.out.println("X = " + ax + ", Y = " + ay +", Z = " + az);
             }
    }
 }

Leave your comments on this post.
Find Coderzheaven on facebook, twitter , google Plus and MySpace for more updates.

Hello all …….

I have shown many examples on how to download and upload files in android through this site.

These are other methods for downloadign a file in android.

1. How to Download an image in ANDROID programatically?
2. How to download a file to your android device from a remote server with a custom progressbar showing progress?

I have shown four methods to upload an image to a server.
Check these posts to refer this.

1. Uploading audio, video or image files from Android to server
2. How to Upload Multiple files in one request along with other string parameters in android?
3. ANDROID – Upload an image to a server.
4. How to upload an image from Android device to server? – Method 4

This is yet another example on how to do download a file.

So this is the java code that downloads the file.

package com.coderzheaven.pack;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class DownloadFileDemo extends Activity {
	
	String dwnload_file_path = "http://coderzheaven.com/sample_folder/sample_file.png";
	String dest_file_path = "/sdcard/dwnloaded_file.png";
	Button b1;
	ProgressDialog dialog = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        b1 = (Button)findViewById(R.id.Button01);
        b1.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				
				dialog = ProgressDialog.show(DownloadFileDemo.this, "", "Downloading file...", true);
				 new Thread(new Runnable() {
			            public void run() {
			            	 downloadFile(dwnload_file_path, dest_file_path);
			            }
			          }).start();				
			}
		});
    }
    
    public void downloadFile(String url, String dest_file_path) {
    	  try {
    		  File dest_file = new File(dest_file_path);
    	      URL u = new URL(url);
    	      URLConnection conn = u.openConnection();
    	      int contentLength = conn.getContentLength();

    	      DataInputStream stream = new DataInputStream(u.openStream());

	          byte[] buffer = new byte[contentLength];
	          stream.readFully(buffer);
	          stream.close();

	          DataOutputStream fos = new DataOutputStream(new FileOutputStream(dest_file));
	          fos.write(buffer);
	          fos.flush();
	          fos.close();
	          hideProgressIndicator();
	          
    	  } catch(FileNotFoundException e) {
    		  hideProgressIndicator();
    	      return; 
    	  } catch (IOException e) {
    		  hideProgressIndicator();
    	      return; 
    	  }
    }
    
    void hideProgressIndicator(){
    	runOnUiThread(new Runnable() {
		    public void run() {
		    	dialog.dismiss();
		    }
		});  
    }
}

This is the xml file that contains the button.

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="File Download Demo from Coderzheaven \n\nFile to download : http://coderzheaven.com/sample_folder/sample_file.png \n\nSaved Path : sdcard/\n"
    />
<Button 
	android:text="Download File" 
	android:id="@+id/Button01" 
	android:layout_width="wrap_content" 
	android:layout_height="wrap_content">
</Button>
</LinearLayout>

Note : Please add these two permissions in the AndroidManifest.xml

  <uses-permission android:name="android.permission.INTERNET"/>    
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Please leave your comments and also share this post if you like it.

Actually this is really simple.

I have already posted an example for how to download a file in this post.

How to Download an image in ANDROID programatically?

This is another one little different with a progressbar included.

Previously I have shown three other methods to upload files to a server.
Check these posts to refer this.

1. Uploading audio, video or image files from Android to server
2. How to Upload Multiple files in one request along with other string parameters in android?
3. ANDROID – Upload an image to a server.

OK We will start now.
This is the file we are going to download.

http://coderzheaven.com/sample_folder/sample_file.png

First we will create a simple layout with a button that will download a file on it’s onClick event.

This is the contents of main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
	android:id="@+id/tv1"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Downloading File with ProgressBar Demo From Coderzheaven"
    />
<Button 
	android:id="@+id/b1"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Download File"
    android:onClick="downloadFile"
    />
</LinearLayout>

Now we will write the java code to download the file.
Copy this code to your main java file. My file is named “DownloadFileDemo1.java”.

package com.coderzheaven.pack;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

public class DownloadFileDemo1 extends Activity {
	
    ProgressBar pb;
    Dialog dialog;
    int downloadedSize = 0;
    int totalSize = 0;
    TextView cur_val;
    String dwnload_file_path = "http://coderzheaven.com/sample_folder/sample_file.png";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
      
        Button b = (Button) findViewById(R.id.b1);
        b.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				 showProgress(dwnload_file_path);
			        
			        new Thread(new Runnable() {
			            public void run() {
			            	 downloadFile();
			            }
			          }).start();
			}
		});
    }
  	    
    void downloadFile(){
    	
    	try {
    		URL url = new URL(dwnload_file_path);
    		HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

    		urlConnection.setRequestMethod("GET");
    		urlConnection.setDoOutput(true);

    		//connect
    		urlConnection.connect();

    		//set the path where we want to save the file    		
    		File SDCardRoot = Environment.getExternalStorageDirectory(); 
    		//create a new file, to save the downloaded file 
    		File file = new File(SDCardRoot,"downloaded_file.png");
 
    		FileOutputStream fileOutput = new FileOutputStream(file);

    		//Stream used for reading the data from the internet
    		InputStream inputStream = urlConnection.getInputStream();

    		//this is the total size of the file which we are downloading
    		totalSize = urlConnection.getContentLength();

    		runOnUiThread(new Runnable() {
			    public void run() {
			    	pb.setMax(totalSize);
			    }			    
			});
    		
    		//create a buffer...
    		byte[] buffer = new byte[1024];
    		int bufferLength = 0;

    		while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
    			fileOutput.write(buffer, 0, bufferLength);
    			downloadedSize += bufferLength;
    			// update the progressbar //
    			runOnUiThread(new Runnable() {
    			    public void run() {
    			    	pb.setProgress(downloadedSize);
    			    	float per = ((float)downloadedSize/totalSize) * 100;
    			    	cur_val.setText("Downloaded " + downloadedSize + "KB / " + totalSize + "KB (" + (int)per + "%)" );
    			    }
    			});
    		}
    		//close the output stream when complete //
    		fileOutput.close();
    		runOnUiThread(new Runnable() {
			    public void run() {
			    	// pb.dismiss(); // if you want close it..
			    }
			});    		
    	
    	} catch (final MalformedURLException e) {
    		showError("Error : MalformedURLException " + e);  		
    		e.printStackTrace();
    	} catch (final IOException e) {
    		showError("Error : IOException " + e);  		
    		e.printStackTrace();
    	}
    	catch (final Exception e) {
    		showError("Error : Please check your internet connection " + e);
    	}    	
    }
    
    void showError(final String err){
    	runOnUiThread(new Runnable() {
		    public void run() {
		    	Toast.makeText(DownloadFileDemo1.this, err, Toast.LENGTH_LONG).show();
		    }
		});
    }
    
    void showProgress(String file_path){
    	dialog = new Dialog(DownloadFileDemo1.this);
    	dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    	dialog.setContentView(R.layout.myprogressdialog);
    	dialog.setTitle("Download Progress");

    	TextView text = (TextView) dialog.findViewById(R.id.tv1);
    	text.setText("Downloading file from ... " + file_path);
    	cur_val = (TextView) dialog.findViewById(R.id.cur_pg_tv);
    	cur_val.setText("Starting download...");
    	dialog.show();
    	
    	pb = (ProgressBar)dialog.findViewById(R.id.progress_bar);
    	pb.setProgress(0);
    	pb.setProgressDrawable(getResources().getDrawable(R.drawable.green_progress));  
    }
}

OK now we have to make a layout for the progressdialog since it is a custom one.

create a new xml file inside res/layout folder and name it myprogressdialog.xml and copy this code into it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/layout_root"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:padding="10dp"
              >
    
    <TextView 
    	android:id="@+id/tv1"
      	android:layout_width="wrap_content"
      	android:layout_height="wrap_content"
      	android:textColor="#FFF"
      	android:text="hello"
      	android:textStyle="bold"  
    />
       
    <TextView 
    	android:id="@+id/cur_pg_tv"
      	android:layout_width="wrap_content"
      	android:layout_height="wrap_content"
      	android:textColor="#0F0"
      	android:text="hello"
      	android:layout_marginTop="5dp"
      	android:textStyle="bold|italic"    />       
    <ProgressBar   
		android:id="@+id/progress_bar"  
		android:layout_width="fill_parent"  
		android:layout_height="wrap_content"  
		android:progress="0"  
		android:layout_marginTop="5dp"
		android:layout_marginBottom="10dp"
		style="?android:attr/progressBarStyleHorizontal"  
		android:maxHeight="10dip"  
		android:minHeight="10dip"  
	/>  
	
</LinearLayout>

Now create a new file inside res/drawable folder and name it “green_progress.xml” and copy this code into it.
This xml is used for giving a green color to the progressbar.

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

<item android:id="@android:id/background">
    <shape>
        <corners android:radius="5dip" />
        <gradient
                android:startColor="#ff9d9e9d"
                android:centerColor="#ff5a5d5a"
                android:centerY="0.75"
                android:endColor="#ff747674"
                android:angle="270"
        />
    </shape>
</item>
<item
    android:id="@android:id/progress">
    <clip>
        <shape>
            <corners
                android:radius="5dip" />
            <gradient
                	android:startColor="@color/greenStart"
                    android:centerColor="@color/greenMid"
                    android:centerY="0.75"
                    android:endColor="@color/greenEnd"
                    android:angle="270"
            />
        </shape>
    </clip>
</item>
</layer-list>

OK now we have customized the progressbar.

This line sets the progressbar to green color.

pb.setProgressDrawable(getResources().getDrawable(R.drawable.green_progress));

The showProgress() method inside the java code will invoke the custom progressbar.

Now the main thing..
Dont forget to add the permissions to the manifest file.

These two are the permissions we need .

This is the AndroidManifest file for this example.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.coderzheaven.pack"
      android:versionCode="1"
      android:versionName="1.0">
      
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".DownloadFileDemo1"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest> 

The file will be downloaded to the sdcard root. Please go to the DDMS perpective and open the File Explorer and expand the SDCARD to see the downloaded file.

Check the screen shot..

.

Hello all….

This post is also about uploading an image to server from your android device.
Previously I have shown three other methods to upload an image to a server.
Check these posts to refer this.

1. Uploading audio, video or image files from Android to server
2. How to Upload Multiple files in one request along with other string parameters in android?
3. ANDROID – Upload an image to a server.

These are for downloading files from the server.

1. How to Download an image in ANDROID programatically?
2. How to download a file to your android device from a remote server with a custom progressbar showing progress?

Now we will see another method.

Before that I will show my sdcard contents. I have some images in my sdcard of which I am uploading one.
check this post to how to put files inside your emulator or device from eclipse.
How to add files like images inside your emulator in ANDROID?

First create a fresh project and name it “UploadImageDemo”.

Now this the layout file I am using for the main activity. (main.xml).
This contains a button which onclick will upload the file.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
	<Button  
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content" 
	    android:text="Upload File"
	    android:id="@+id/but"
    />
    
	<TextView  
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content" 
	    android:text="@string/hello"
	    android:id="@+id/tv"
	    android:textColor="#00FF00"
	    android:textStyle="bold"
    />
 </LinearLayout>

Now the java code.
UploadImageDemo.java

package com.coderzheaven.pack;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class UploadImageDemo extends Activity {
   
	TextView tv;
	Button b;
	int serverResponseCode = 0;
	ProgressDialog dialog = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        b = (Button)findViewById(R.id.but);
        tv = (TextView)findViewById(R.id.tv);
        tv.setText("Uploading file path :- '/sdcard/android_1.png'");
        
        b.setOnClickListener(new OnClickListener() {			
			@Override
			public void onClick(View v) {
				dialog = ProgressDialog.show(UploadImageDemo.this, "", "Uploading file...", true);
				 new Thread(new Runnable() {
					    public void run() {
					    	 runOnUiThread(new Runnable() {
				    			    public void run() {
				    			    	tv.setText("uploading started.....");
				    			    }
				    			});					     
					   	 int response= uploadFile("/sdcard/android_1.png");
				         System.out.println("RES : " + response);					      
					    }
					  }).start();		 
				}
		});
    }
    
    public int uploadFile(String sourceFileUri) {
    	  String upLoadServerUri = "http://10.0.2.2/upload_test/upload_media_test.php";
    	  String fileName = sourceFileUri;

    	  HttpURLConnection conn = null;
    	  DataOutputStream dos = null;  
    	  String lineEnd = "\r\n";
    	  String twoHyphens = "--";
    	  String boundary = "*****";
    	  int bytesRead, bytesAvailable, bufferSize;
    	  byte[] buffer;
    	  int maxBufferSize = 1 * 1024 * 1024; 
    	  File sourceFile = new File(sourceFileUri); 
    	  if (!sourceFile.isFile()) {
    	   Log.e("uploadFile", "Source File Does not exist");
    	   return 0;
    	  }
	    	  try { // open a URL connection to the Servlet
	    	   FileInputStream fileInputStream = new FileInputStream(sourceFile);
	    	   URL url = new URL(upLoadServerUri);
	    	   conn = (HttpURLConnection) url.openConnection(); // Open a HTTP  connection to  the URL
	    	   conn.setDoInput(true); // Allow Inputs
	    	   conn.setDoOutput(true); // Allow Outputs
	    	   conn.setUseCaches(false); // Don't use a Cached Copy
	    	   conn.setRequestMethod("POST");
	    	   conn.setRequestProperty("Connection", "Keep-Alive");
	    	   conn.setRequestProperty("ENCTYPE", "multipart/form-data");
	    	   conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
	    	   conn.setRequestProperty("uploaded_file", fileName); 
	    	   dos = new DataOutputStream(conn.getOutputStream());
	
	    	   dos.writeBytes(twoHyphens + boundary + lineEnd); 
	    	   dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""+ fileName + "\"" + lineEnd);
	    	   dos.writeBytes(lineEnd);
	
	    	   bytesAvailable = fileInputStream.available(); // create a buffer of  maximum size
	
	    	   bufferSize = Math.min(bytesAvailable, maxBufferSize);
	    	   buffer = new byte[bufferSize];
	
	    	   // read file and write it into form...
	    	   bytesRead = fileInputStream.read(buffer, 0, bufferSize);  
	    	    
	    	   while (bytesRead > 0) {
	    	     dos.write(buffer, 0, bufferSize);
	    	     bytesAvailable = fileInputStream.available();
	    	     bufferSize = Math.min(bytesAvailable, maxBufferSize);
	    	     bytesRead = fileInputStream.read(buffer, 0, bufferSize);	    	    
	    	    }
	
	    	   // send multipart form data necesssary after file data...
	    	   dos.writeBytes(lineEnd);
	    	   dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
	
	    	   // Responses from the server (code and message)
	    	   serverResponseCode = conn.getResponseCode();
	    	   String serverResponseMessage = conn.getResponseMessage();
	    	   
	    	   Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode);
	    	   if(serverResponseCode == 200){
	    		   runOnUiThread(new Runnable() {
	    			    public void run() {
	    			    	tv.setText("File Upload Completed.");
	    			    	Toast.makeText(UploadImageDemo.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
	    			    }
	    			});	    		   
	    	   }	
	    	  
	    	   //close the streams //
	    	   fileInputStream.close();
	    	   dos.flush();
	    	   dos.close();
	    	   
	      } catch (MalformedURLException ex) {  
	    	  dialog.dismiss();  
	    	  ex.printStackTrace();
	    	  Toast.makeText(UploadImageDemo.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
	    	  Log.e("Upload file to server", "error: " + ex.getMessage(), ex);  
    	  } catch (Exception e) {
    		  dialog.dismiss();  
    		  e.printStackTrace();
    		  Toast.makeText(UploadImageDemo.this, "Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show();
    		  Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);  
    	  }
    	  dialog.dismiss();    	  
    	  return serverResponseCode;  
    	 } 
}

This is the manifest file.
Make sure to add the internet permission in the AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.coderzheaven.pack"
      android:versionCode="1"
      android:versionName="1.0">
      
    <uses-permission android:name="android.permission.INTERNET"/>    
    
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".UploadImageDemo"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest> 

OK Our Android part is over.

Now we will go to the server part.
I am using xampp in Windows. So my code goes to the htdocs folder inside my xampp folder.
ie. I am working on localhost, however you can replace the url with your own server name.
Inside the htdocs folder create a folder named “upload_test” and inside that create a file named “upload_media_test.php” and copy this code into it.

So the path is like this.

C:/xampp/htdocs/upload_test/upload_media_test.php.

<?php
$target_path1 = "uploads/";
/* Add the original filename to our target path.
Result is "uploads/filename.extension" */
$target_path1 = $target_path1 . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $target_path1)) {
    echo "The first file ".  basename( $_FILES['uploaded_file']['name']).
    " has been uploaded.";
} else{
    echo "There was an error uploading the file, please try again!";
    echo "filename: " .  basename( $_FILES['uploaded_file']['name']);
    echo "target_path: " .$target_path1;
}
?>

I am uploading the file into a folder named “uploads” which is in the same directory as the above php code.
So please create a “uploads” folder before running this code.

Also before running this code make sure that
1. Your server is running.
2. Your serverpath is correct.
3. The folder has correct write permissions.
4. You have the file to upload the file in the sdcard.
check this post to how to put files inside your emulator or device from eclipse.
How to add files like images inside your emulator in ANDROID?

OK now run the application and check the upload directory.
If the server response the ’200′, your file has been uploaded.

Please leave your valuable comments on this post.

Hello all..

This simple example will show you how to change the hint text color in android

Here is the java code to simply do this.

youredittext.setHint(Html.fromHtml("<font color='#FF0000'>Hello</font> "));

here is a sample project to view the difference.

This is the contents of the main java file.

package com.coderzheaven.pack;

import android.app.Activity;
import android.os.Bundle;
import android.text.Html;
import android.widget.EditText;

public class HintColorDemoActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);

          EditText ed = (EditText)findViewById(R.id.editText1);
          ed.setHint("Hello ");

          EditText ed2 = (EditText)findViewById(R.id.editText2);
          ed2.setHint(Html.fromHtml("<font color='#FF0000'>Hello</font> "));
     }
}

The main.xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     android:orientation="vertical" >

     <TextView
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:text="@string/hello" />

     <EditText
          android:id="@+id/editText1"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:ems="10" >

          <requestFocus />
     </EditText>

     <EditText
          android:id="@+id/editText2"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:ems="10" >
     </EditText>
</LinearLayout>

Here I am setting a read color to the second edittext hint.
See the screenshot.

Please leave your comments if you found this useful.

Here is a simple example to copy an image to another image file in ANDROID.
In this example a button click will open the gallery and after that it will be copied to another image file.
You have to check the File-explorer to find the file.

This is the java code for doing it.

package pack.coderzheaven;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.channels.FileChannel;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class CopyingImageFromGalleryDemo extends Activity {

	String mSelectedImagePath;
	private static final int SELECT_IMAGE = 1;
	Button b;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        b = (Button)findViewById(R.id.Button01);
        b.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				imageFromGallery();
			}
		});
    }

    /*** this function opens the gallery and gets the image ***/
    public void imageFromGallery() {
    	Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent,"Select Picture"), SELECT_IMAGE);
    }

    /* After opening gallery control comes here */
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
    	  super.onActivityResult(requestCode, resultCode, data);
    	  if (resultCode == RESULT_OK) {
    	    switch(requestCode) {
	    	    case SELECT_IMAGE:
	    	        mSelectedImagePath = getPath(data.getData());
	    	        System.out.println("mSelectedImagePath : " + mSelectedImagePath);
	    	        try {
	    	    		File sd = Environment.getExternalStorageDirectory();
	    	    		if (sd.canWrite()) {
	    	    			System.out.println("(sd.canWrite()) = " + (sd.canWrite()));
	    	    		    String destinationImagePath= "/file.jpg";	// this is the destination image path.
	    	    		    File source = new File(mSelectedImagePath );
	    	    		    File destination= new File(sd, destinationImagePath);
	    	    		    if (source.exists()) {
	    	    		        FileChannel src = new FileInputStream(source).getChannel();
	    	    		        FileChannel dst = new FileOutputStream(destination).getChannel();
	    	    		        dst.transferFrom(src, 0, src.size());		// copy the first file to second.....
	    	    		        src.close();
	    	    		        dst.close();
	    	    		        Toast.makeText(getApplicationContext(), "Check the copy of the image in the same path as the gallery image. File is name file.jpg", Toast.LENGTH_LONG).show();
	    	    		    }
	    	    		}else{
	    	    			Toast.makeText(getApplicationContext(), "SDCARD Not writable.", Toast.LENGTH_LONG).show();
	    	    		}
	    	    	}catch (Exception e) {
	    	    		System.out.println("Error :" + e.getMessage());
	    	    	}
	    	        break;
    	  }
    	}
    }

	public String getPath(Uri uri) {
		String[] projection = { MediaStore.Images.Media.DATA };
		Cursor cursor = managedQuery(uri, projection, null, null, null);
		startManagingCursor(cursor);
		int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
		cursor.moveToFirst();
		return cursor.getString(column_index);
	}
}

here is the main.xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
<Button
	android:text="Gallery"
	android:id="@+id/Button01"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content">
</Button>
</LinearLayout>

Then the strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello"><b>Copying an Image to another Demo From CoderzHeaven</b></string>
    <string name="app_name">Copy an Image to another</string>
</resources>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="pack.coderzheaven"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".CopyingImageFromGalleryDemo"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

Copy Image Demo

Copy Image Demo

Change the name of the file as you like.
Enjoy…………..

Please leave your comments and click on the +1 button above.

Hello everyone…

Today we will see how to customize an indeterminate progressBar in android.
For that we have to create an xml with a progress animation.For this I used these three images

Inside the folder res/drawable create an xml named “progress_indeterminate_horizontal.xml” and copy this code into it

<?xml version="1.0" encoding="utf-8"?>
<animation-list
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:oneshot="false">
    <item android:drawable="@drawable/p1" android:duration="200" />
    <item android:drawable="@drawable/p2" android:duration="200" />
    <item android:drawable="@drawable/p3" android:duration="200" />
</animation-list>

Now the layout file containing the progressBar.I named it main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />

    <ProgressBar
    	android:id="@+id/progress_bar"
         android:layout_width="fill_parent"
         android:layout_height="20dip"
         android:indeterminateDrawable="@drawable/progress_indeterminate_horizontal"
     />
 </LinearLayout>

See the line

android:indeterminateDrawable=”@drawable/progress_indeterminate_horizontal”

where I have added the xml as drawable.

Done. Now goon and run the project. Nothing needs to be done in the java code. Enjoy.

Custom Indeterminate progressBar

Please leave your valuable comments if you find this post useful.

Here is another one for creating custom progressbars.

How to build a custom progressBar in android- Part 2?

Here is a simple example to show two listviews horizintally in android.

here is the java code that sets up the list.

package com.coderzheaven.pack;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class AlphabetListDemo extends Activity {
	//String of alphabets //
	String[] alphabts = {"A","B","C","D","E","F","G","H","I","J","K","L"};
	ListView L1, L2;
	myAdapter myadp;
	myAdapter2 myadp2;
	String prod_arr[] = {};

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        L1 = (ListView)findViewById(R.id.list1);
        L2 = (ListView)findViewById(R.id.list2);

        myadp = new myAdapter(this,alphabts);
        L2.setAdapter(myadp);

        // initial populating //
        setProducts(0);

        L2.setOnItemClickListener(new OnItemClickListener(){
    		@Override
    		public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
    				long arg3) {
    			setProducts(arg2);
    		}
    	});

    }

    public void setProducts(int number){
    	prod_arr = new String[25];
    	// adding some dummy data //
    	for(int i = 0; i < 25 ; i++){
			prod_arr[i] = "Product : " + alphabts[number] + i;
		}
		//setting the adapter in listview //
		 myadp2 = new myAdapter2(AlphabetListDemo.this,prod_arr);
	     L1.setAdapter(myadp2);
    }

    class myAdapter extends ArrayAdapter<String>
    {
  	   TextView label;
  	   ImageView image;
  	   View row;
  	   public myAdapter(Context context,String[] arr)
  	   {
  		    super(context, android.R.layout.simple_list_item_1, arr);
  	   }

  	   public View getView(final int position, View convertView, ViewGroup parent)
  		{
  	 		   try{
  	 				LayoutInflater inflater=getLayoutInflater();
  	 				row = inflater.inflate(R.layout.lv_rows, parent, false);
  					label = (TextView)row.findViewById(R.id.item_title);
  					label.setText(alphabts[position]);
  					label.setTextColor(Color.YELLOW);
  	 		   }catch(Exception e){

  			   }
  		    return row;
  		}
    }
    // adapter for second list.....
    class myAdapter2 extends ArrayAdapter<String>
    {
  	   TextView label;
  	   ImageView image;
  	   View row;
  	   public myAdapter2(Context context,String[] arr)
  	   {
  		    super(context, android.R.layout.simple_list_item_1, arr);
  	   }

  	   public View getView(final int position, View convertView, ViewGroup parent)
  		{
  	 		   try{
  	 				LayoutInflater inflater=getLayoutInflater();
  	 				row = inflater.inflate(R.layout.lv_rows, parent, false);
  					label = (TextView)row.findViewById(R.id.item_title);
  					label.setText(prod_arr[position]);
  					label.setTextColor(Color.WHITE);
  	 		   }catch(Exception e){

  			   }
  		    return row;
  		}
    }
}

Here is the main.xml file.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="fill_parent">

    <LinearLayout
	    android:layout_width="fill_parent"
	    android:layout_height="fill_parent"
	    android:layout_marginLeft="5dp"
	    android:layout_marginRight="5dp"
	    android:layout_marginTop="5dp"
	    android:orientation="horizontal">

	    <!--  this list contains products -->
		 <ListView
		 	android:id="@+id/list1"
			android:cacheColorHint="#00000000"
			android:scrollbars="none"
			android:fadingEdge="vertical"
			android:soundEffectsEnabled="true"
			android:dividerHeight="1px"
			android:padding="0dip"
			android:smoothScrollbar="true"
		    android:layout_width="fill_parent"
		    android:layout_height="wrap_content"
		    android:drawSelectorOnTop="false"
		    android:layout_marginTop="5dip"
		    android:layout_marginLeft="5dip"
		    android:layout_marginRight="5dip"
		    android:layout_marginBottom="5dip"
		    android:layout_weight="1"
		   />

		  <ListView
		 	android:id="@+id/list2"
		 	android:layout_weight="4"
			android:cacheColorHint="#00000000"
			android:scrollbars="none"
			android:fadingEdge="vertical"
			android:soundEffectsEnabled="true"
			android:dividerHeight="1px"
			android:padding="0dip"
			android:smoothScrollbar="true"
		    android:layout_width="wrap_content"
		    android:layout_height="wrap_content"
		    android:drawSelectorOnTop="false"
		    android:layout_marginTop="5dip"
		    android:layout_marginLeft="5dip"
		    android:layout_marginRight="5dip"
		    android:layout_marginBottom="5dip" />

  	</LinearLayout>
    </LinearLayout>

Here is the layout for each row in the list .

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="7dp"
    >
        <TextView
            android:id="@+id/item_title"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:padding="2dp"
            android:text="Main Item"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textSize="14dp"
            android:textStyle="normal" />
 </RelativeLayout>

Here is the complete source code for this example.

Hello all…..

In today’s post I will show you how to create a single selection list in android.

Here is the main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
     <ListView
		 	android:id="@android:id/list"
			android:cacheColorHint="#00000000"
			android:scrollbars="none"
			android:fadingEdge="vertical"
			android:soundEffectsEnabled="true"
			android:dividerHeight="1px"
			android:padding="5dip"
			android:smoothScrollbar="true"
		    android:layout_width="fill_parent"
		    android:layout_height="wrap_content"
		    android:drawSelectorOnTop="false"
		    android:layout_marginLeft="10dip"
		    android:layout_marginRight="10dip"
		    android:layout_marginBottom="10dip"
		    android:layout_weight="1"/>

</LinearLayout>

Now this line in the java file creates the single choice.

setListAdapter(new ArrayAdapter(this,
android.R.layout.simple_list_item_single_choice,
android.R.id.text1, names));

Now this is the full java code

package com.coderzheaven.pack;

import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class ListView1 extends ListActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        String[] names = new String[] { "Android", "Windows7", "Symbian", "iPhone",
        		"Android", "Windows7", "Symbian", "iPhone",
        		"Android", "Windows7", "Symbian", "iPhone" };
		setListAdapter(new ArrayAdapter<String>(this,
					   android.R.layout.simple_list_item_single_choice,
					   android.R.id.text1, names));
		ListView listView = getListView();
		listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

    }
}

Single Choice ListView

Single Selection ListView in android

Hello everyone

Today I will explain how will you call a function that is defined inside the java android code from a webview.
For this we need to add a webviewclient in android for the WebView we are adding in the xml.

Then we have to register the webviewclient with the WebView we are creating using this method.

 myWebView.setWebViewClient(new MyWebViewClient());

Now we will start….

Create a new project and name it WebViewDemo.

Now in the main.xml copy this code.
This file contains the webview only.

<?xml version="1.0" encoding="utf-8"?>
<WebView  xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/webview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
/>

Now create a file named test.html inside the assets folder and copy this code into it. This is the html file that we are loading into the webview.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN"
    "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">
<html>
<body>
<a href="http://www.coderzheaven.com">CoderzHeaven</a>
<input type="button" value="Click Me" onClick="showAndroidToast('Hello CoderzHeaven!')" />
<script type="text/javascript">
    function showAndroidToast(toast) {
    	Android.showToast(toast);
    }
</script>
</body>
</html>

Now in the java code refer the webview and load the html file

WebView myWebView;
 myWebView = (WebView) findViewById(R.id.webview);
 myWebView.loadUrl("file:///android_asset/test.html");

Now enable the javascript by calling this function

 WebSettings webSettings = myWebView.getSettings();
 webSettings.setJavaScriptEnabled(true);

Now we have to add the javascript interface for listening to the javascript functions that we define in the webview html file.

  myWebView.addJavascriptInterface(new JavaScriptInterface(this), "Android");

// outside oncreate
 public class JavaScriptInterface {
        Context mContext;

        /** Instantiate the interface and set the context */
        JavaScriptInterface(Context c) {
            mContext = c;
        }

        /** Show a toast from the web page */
        public void showToast(String toast) {
            Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
            startActivity(new Intent(WebViewDemo.this, WebViewDemo.class));
        }
    }

Now create a webview client for listening to the browser activities and doing specific function.

 myWebView.setWebViewClient(new MyWebViewClient());

 private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            if (Uri.parse(url).getHost().equals("www.coderzheaven.com")) {
               	Toast.makeText(getApplicationContext(), "www.coderzheaven.com", Toast.LENGTH_SHORT).show();
                return false;
            }
            // Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
            startActivity(intent);
            return true;
        }
    }

Now we listen to the backbutton.

 @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // Check if the key event was the BACK key and if there's history
        if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
            myWebView.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

Now the project is over . Now run and see the result.
Here is the full java code for this example

package com.coderzheaven.pack;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

public class WebViewDemo extends Activity {

	WebView myWebView;
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        myWebView = (WebView) findViewById(R.id.webview);
        myWebView.loadUrl("file:///android_asset/test.html");
        WebSettings webSettings = myWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);

        myWebView.addJavascriptInterface(new JavaScriptInterface(this), "Android");

       // myWebView.setWebViewClient(new WebViewClient());
        myWebView.setWebViewClient(new MyWebViewClient());
    }

    public class JavaScriptInterface {
        Context mContext;

        /** Instantiate the interface and set the context */
        JavaScriptInterface(Context c) {
            mContext = c;
        }

        /** Show a toast from the web page */
        public void showToast(String toast) {
            Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
            startActivity(new Intent(WebViewDemo.this, WebViewDemo.class));
        }
    }

    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            if (Uri.parse(url).getHost().equals("www.google.com")) {
                // This is my web site, so do not override; let my WebView load the page
            	Toast.makeText(getApplicationContext(), "www.google.com", Toast.LENGTH_SHORT).show();
                return false;
            }
            // Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
            startActivity(intent);
            return true;
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // Check if the key event was the BACK key and if there's history
        if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
            myWebView.goBack();
            return true;
        }
        // If it wasn't the BACK key or there's no web page history, bubble up to the default
        // system behavior (probably exit the activity)
        return super.onKeyDown(keyCode, event);
    }
}

Calling an android function from javascript

please leave your valuable comments if this post was useful.

In the previous example I showed how to parse an xml that is stored in a file in res/xml folder.
In this post I will show you how to parse an xml that is stored in a server in an xml file.

Here I am using an xml that is stored in here

Here is the java code for that.

First create a fresh project and name it ParseXMLDemo

Then in the ParseXMLDemo.java file copy this code

package com.coderzheaven.pack;

import java.util.ArrayList;
import java.util.HashMap;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class ParseXMLDemo extends ListActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();

        String xml = ParseXMLMethods.getXML();
        Document doc = ParseXMLMethods.XMLfromString(xml);

        int numResults = ParseXMLMethods.numResults(doc);

        if((numResults <= 0)){
        	Toast.makeText(ParseXMLDemo.this, "There is no data in the xml file", Toast.LENGTH_LONG).show();
        	finish();
        }

		NodeList children = doc.getElementsByTagName("os");

		for (int i = 0; i < children.getLength(); i++) {
			HashMap<String, String> map = new HashMap<String, String>();
			Element e = (Element)children.item(i);
			map.put("id", ParseXMLMethods.getValue(e, "id"));
        	map.put("name", ParseXMLMethods.getValue(e, "name"));
        	map.put("site", ParseXMLMethods.getValue(e, "site"));
        	mylist.add(map);
		}

        ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.list_layout,
                        new String[] { "name", "site" },
                        new int[] { R.id.title, R.id.subtitle});

        setListAdapter(adapter);

        final ListView lv = getListView();
        lv.setOnItemClickListener(new OnItemClickListener() {
        	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        		@SuppressWarnings("unchecked")
				HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position);
        		Toast.makeText(ParseXMLDemo.this,o.get("name"), Toast.LENGTH_LONG).show();
			}
		});
    }
}

Now create another java file inside the src folder and name it ParseXMLMethods.java and copy this contents into it.

package com.coderzheaven.pack;

import java.io.IOException;
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;


public class ParseXMLMethods {

	public final static Document XMLfromString(String xml){

		Document doc = null;

		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        try {

			DocumentBuilder db = dbf.newDocumentBuilder();

			InputSource is = new InputSource();
	        is.setCharacterStream(new StringReader(xml));
	        doc = db.parse(is);

		} catch (ParserConfigurationException e) {
			System.out.println("XML parse error: " + e.getMessage());
			return null;
		} catch (SAXException e) {
			System.out.println("Wrong XML file structure: " + e.getMessage());
            return null;
		} catch (IOException e) {
			System.out.println("I/O exeption: " + e.getMessage());
			return null;
		}
        return doc;
	}

	 public final static String getElementValue( Node elem ) {
	     Node kid;
	     if( elem != null){
	         if (elem.hasChildNodes()){
	             for( kid = elem.getFirstChild(); kid != null; kid = kid.getNextSibling() ){
	                 if( kid.getNodeType() == Node.TEXT_NODE  ){
	                     return kid.getNodeValue();
	                 }
	             }
	         }
	     }
	     return "";
	 }

	 public static String getXML(){
			String line = null;

			try {

				DefaultHttpClient httpClient = new DefaultHttpClient();
				HttpPost httpPost = new HttpPost("http://coderzheaven.com/xml/test.xml");

				HttpResponse httpResponse = httpClient.execute(httpPost);
				HttpEntity httpEntity = httpResponse.getEntity();
				line = EntityUtils.toString(httpEntity);

			} catch (Exception e) {
				line = "Internet Connection Error >> " + e.getMessage();
			}
			return line;
	}

	public static int numResults(Document doc){
		Node results = doc.getDocumentElement();
		int res = -1;
		try{
			res = Integer.valueOf(results.getAttributes().getNamedItem("count").getNodeValue());
		}catch(Exception e ){
			res = -1;
		}
		return res;
	}

	public static String getValue(Element item, String str) {
		NodeList n = item.getElementsByTagName(str);
		return ParseXMLMethods.getElementValue(n.item(0));
	}
}

Now the main layout file main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <ListView
	 	android:id="@id/android:list"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
	    android:layout_weight="1"
	    android:background="#FF0000"
	 	android:drawSelectorOnTop="false" />
</LinearLayout>

Create another file named list_layout.xml inside the layout folder and copy this code into it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="7dp"
    >
<TextView
	android:id="@+id/title"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:padding="2dp"
    android:textSize="20dp"
    android:textStyle="bold"
    />
    <TextView
	android:id="@+id/subtitle"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="2dp"
    android:textSize="14dp"
    android:textColor="#000000" />
</LinearLayout>

This is the Strings.xml file

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, ParseXMLDemo!</string>
    <string name="app_name">ParseXMLDemo Coderzheaven.com</string>
</resources>

Now you are done go on and run the application.

Parse XML in Android

Get the full source code from here and don’t forget to comment on this post.