CoderzHeaven

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.

We will go straight to the code.

package com.coderzheaven.seterror;

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;

public class MainActivity extends Activity {

	 @Override
	    public void onCreate(Bundle savedInstanceState) {
	        super.onCreate(savedInstanceState);
	        setContentView(R.layout.activity_main);
	        Button btn =(Button)findViewById(R.id.button1);
	        btn.setOnClickListener(new OnClickListener() {
	            
	            @Override
	            public void onClick(View v) {
	                 EditText edittext =(EditText)findViewById(R.id.editText1);
	                if(edittext.getText().length()==0){
	                    edittext.setError("Field cannot be left blank.");
	                }
	            }
	        });
	    }
}

This is the layout containing the EditText and the Button.

<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" >

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

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/editText1"
        android:text="Check" />

</RelativeLayout>

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

We may have applications in which we may have to make repeated calls to a webservice. At that time services may be useful.

This is such an example in which we will be creating a Service in android to create a repeated call to a webservice in a time delay of some seconds or milliseconds.

OK We will start.

First We will create a new android project named “AcessWebFromService” and in the main java file copy this code.

package com.coderzheaven.pack;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;

public class AcessWebFromServiceDemo extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        startService(new Intent(AcessWebFromServiceDemo.this, MyService.class));
    }
}

You may be getting some errors after this. Now we will clear all the errors.

Now create another class and name it “MyService.java“. This is our Service file that extends Android Service.

Paste this code into this file .

package com.coderzheaven.pack;

import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

public class MyService extends Service{
	
	private static String TAG = MyService.class.getSimpleName();
	private MyThread mythread;
	public boolean isRunning = false;
	
	@Override
	public IBinder onBind(Intent arg0) {
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();
		Log.d(TAG, "onCreate");		
		mythread  = new MyThread();
	}

	@Override
	public synchronized void onDestroy() {
		super.onDestroy();
		Log.d(TAG, "onDestroy");
		if(!isRunning){
			mythread.interrupt();
			mythread.stop();
		}		
	}

	@Override
	public synchronized void onStart(Intent intent, int startId) {
		super.onStart(intent, startId); 
		Log.d(TAG, "onStart");
		if(!isRunning){
			mythread.start();
			isRunning = true;
		}
	}
	
	public void readWebPage(){
          HttpClient client = new DefaultHttpClient();
          HttpGet request = new HttpGet("http://google.com");
          // Get the response
          ResponseHandler<String> responseHandler = new BasicResponseHandler();
          String response_str = null;
		  try {
			 response_str = client.execute(request, responseHandler);
			 if(!response_str.equalsIgnoreCase("")){
				 Log.d(TAG, "Got Response");
			 }
		  } catch (Exception e) {
			 e.printStackTrace();
		  }
	}
	
	class MyThread extends Thread{
		static final long DELAY = 3000;
		@Override
		public void run(){			
			while(isRunning){
				Log.d(TAG,"Running");
				try {					
					readWebPage();
					Thread.sleep(DELAY);
				} catch (InterruptedException e) {
					isRunning = false;
					e.printStackTrace();
				}
			}
		}
		
	}

}

We have called this service to start running in the main java file using this code.

startService(new Intent(AcessWebFromServiceDemo.this, MyService.class));

Now the important thing is for this service to run we have to declare it in the AndroidManifest file.

This is how the AndroidManifest file looks.

<?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">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".AcessWebFromServiceDemo"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <service android:name=".MyService"></service>

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

OK Now you are done. When you run this application you can see the Log coming every three seconds in the LogCat. PLease make sure that you have internet connection in the Emulator or Device.

This is how the Log looks in the Logcat.

Please leave your valuable comments on this post and also share it by hitting a plus(+1) button.

Hello everyone…

I have already shown you how to override default animation between activities.
Today I will show a zoom in and out animation between activities.

Take a look at this post for another animation between activities.

Create files named zoom_enter.xml and zoom_exit.xml in the res/anim folder.

zoom_enter.xml file contents.

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@android:anim/decelerate_interpolator">
    <scale android:fromXScale="2.0" android:toXScale="1.0"
           android:fromYScale="2.0" android:toYScale="1.0"
           android:pivotX="50%p" android:pivotY="50%p"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>

zoom_exit.xml file contents.

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@android:anim/decelerate_interpolator"
        android:zAdjustment="top">
    <scale android:fromXScale="1.0" android:toXScale=".5"
           android:fromYScale="1.0" android:toYScale=".5"
           android:pivotX="50%p" android:pivotY="50%p"
           android:duration="@android:integer/config_mediumAnimTime" />
    <alpha android:fromAlpha="1.0" android:toAlpha="0"
            android:duration="@android:integer/config_mediumAnimTime"/>
</set>

Now replace this is in the previous post

overridePendingTransition(R.anim.fade, R.anim.hold);

with this code

overridePendingTransition(R.anim.zoom_enter, R.anim.zoom_exit);

Now run the application and you are done.
You will see a zoom in animation between the activities.
Refer this post for the rest of the code

Hi all…..

This example reads the file line by line using readLine() function till the end of the file. Here your need two classes named “InputStreamReader” and “BufferedReader”. For writing into the file you need “OutputStreamReader” class. The result is displayed in a Toast. Make sure you notice it.

The following is the code for reading the text file………

String     res  =    null;
try {

	   InputStream       in = openFileInput("myfile.txt");

	   if (in != null) {
	    // prepare the file for reading
	     InputStreamReader input = new InputStreamReader(in);
	     BufferedReader buffreader = new BufferedReader(input);

	      res = "";
	      while (( line = buffreader.readLine()) != null) {
	      	res += line;
	      }
	      in.close();
	      Toast.makeText(getApplicationContext(),"File Contents ==> " + res,Toast.LENGTH_SHORT).show();
          }else{
	    }

} catch(Exception e){
       Toast.makeText(getApplicationContext(),     e.toString() +   e.getMessage(),Toast.LENGTH_SHORT).show();
}

Want More then

How to read and write files to SDCARD and application SandBox in Android – A complete example?

Please leave your comments on this post.

Hi,

For converting string to a date in JAVA use the following code.

import java.text.SimpleDateFormat;
import java.util.Date;

public class Main {

  public static void main(String[] args) throws Exception {

    SimpleDateFormat myDateFormat = new SimpleDateFormat("dd/MM/yyyy");

    Date dateToday = dateFormat.parse("25/06/2011");

    System.out.println(myDateFormat.format(dateToday));

  }
}

For creating Custom ListView First create a new project named “Lists” and the language is “C#” here.

Now open the “MainPage.xaml” and copy this code.

<phone:PhoneApplicationPage
    x:Class="Lists.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:controls="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="800"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait"  Orientation="Portrait"
    shell:SystemTray.IsVisible="False">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">

                <ListBox Margin="12,75,12,0" Name="L1"  SelectionChanged="ListBox_SelectionChanged">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel Margin="0,0,0,17" Width="432" Height="78">
                                <TextBlock  TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
                                <TextBlock  TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
                            </StackPanel>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
        <TextBlock Height="33" HorizontalAlignment="Left" Margin="12,36,0,0" Name="textBlock1" Text="Custom ListBoxes In windows Phone 7" VerticalAlignment="Top" Width="456" FlowDirection="LeftToRight" Grid.RowSpan="1" Foreground="#FF1BEB8D" AllowDrop="False" />
    </Grid>
</phone:PhoneApplicationPage>

Now we have to create another xaml for each custom row in the List.
For that right click on the project folder in the solution explorer.
Please check the screenshot, then select Add->New Item.

.

Now select the “Windows Phone User control”.
See the Screenshot.

Now in the “List_row.xaml” file copy this code.

<UserControl x:Class="Lists.List_row"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    d:DesignHeight="480" d:DesignWidth="319">

    <Grid x:Name="LayoutRoot" Height="60" Width="480" Background="#FF382725">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="220*" />
            <ColumnDefinition Width="480*" />
        </Grid.ColumnDefinitions>
        <TextBlock Height="30" HorizontalAlignment="Left" Margin="66,6,0,0" Name="title" Text="TextBlock" VerticalAlignment="Top" Width="351" FontFamily="Times New Roman" Grid.ColumnSpan="2" Foreground="#FF00BE3A" />
        <Image Height="45" HorizontalAlignment="Left" Name="myimage" Stretch="Fill" VerticalAlignment="Top" Width="44" Margin="8,5,0,0" Source="/Lists;component/images/coderzheaven.png" />
        <TextBlock Height="15" HorizontalAlignment="Left" Margin="67,33,0,0" Name="sub" Text="TextBlock" VerticalAlignment="Top" Width="384" FontSize="14" FontStyle="Normal" FontFamily="Times New Roman" Grid.ColumnSpan="2" Foreground="#FFD15F3E" />
    </Grid>
</UserControl>

Copy five image files into a folder named images in the solution explorer as shown in the first screenshot.

Open MainPage.cs from the solution explorer and copy this code into it.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;

namespace Lists
{
    public partial class MainPage : PhoneApplicationPage
    {
        // Constructor
        public MainPage()
        {
            InitializeComponent();

            string[] arr1 = new string[] { "CoderzHeaven", "Google", "Android","Apple", "Windows" };
            string[] sub = new string[] { "www.coderzheaven.com", "www.google.com", "www.android.com", "www.apple.com", "www.microsoft.com" };
            string[] images = new string[] { "coderzheaven", "google", "android", "apple", "windows" };

            for(int i = 0; i < arr1.Length ; ++i){
                List_row row = new List_row();
                row.title.Text = arr1[i];
                row.sub.Text = sub[i];
                row.myimage.Source = (ImageSource)new ImageSourceConverter().ConvertFromString("images/" + images[i] + ".png");
                L1.Items.Add(row);

            }
            for (int i = 0; i < arr1.Length; ++i)
            {
                List_row row = new List_row();
                row.title.Text = arr1[i];
                row.sub.Text = sub[i];
                row.myimage.Source = (ImageSource)new ImageSourceConverter().ConvertFromString("images/" + images[i] + ".png");
                L1.Items.Add(row);

            }
            for (int i = 0; i < arr1.Length; ++i)
            {
                List_row row = new List_row();
                row.title.Text = arr1[i];
                row.sub.Text = sub[i];
                row.myimage.Source = (ImageSource)new ImageSourceConverter().ConvertFromString("images/" + images[i] + ".png");
                L1.Items.Add(row);

            }

            this.Loaded += new RoutedEventHandler(MainPage_Loaded);

        }

        // Load data for the ViewModel Items
        private void MainPage_Loaded(object sender, RoutedEventArgs e)
        {

        }

        private void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {

        }
    }
}

Please leave your valuable comments on this post.

Download the complete source code from here.

In order to receive memory warning in Corona, use the following chunk of code,

local function memoryWarningCheck ( event )
    print( "Memory Warning ! Memory is leaking somewhere! " )
end
Runtime:addEventListener( "memoryWarning", memoryWarningCheck )

In order to get the elapsed time after the application launch in Corona, use the following lines of code,

function elapsedTimeCalc( event )
  print ("Time elapsed since app launch---"..event.time/1000 )
end

Runtime:addEventListener("enterFrame", elapsedTimeCalc)

Thus we will get the elapsed time after the app launch in milliseconds.

Hello everyone,
Here is a simple example showing how to change the theme of default AlertDialog in android.

To start first create a fresh project named AlertTest.
In the AlertTestDemo.java file copy this code

package com.coderzheaven.pack;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;

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

        AlertDialog dialog = new CustomDialog(this);
        dialog.setButton("OK", new OnClickListener()
        {
            public void onClick(DialogInterface arg0, int arg1)
            {
            }
        });
        dialog.setTitle("Coderzheaven");
        dialog.setMessage("Heaven of all working codes!! n Keep Visiting..n" +
        		"Thankyou.");
        dialog.show();
    }
}

Now create a file named “styles.xml” inside the res/values folder and copy this code into it.

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <style name="CenterTextView" parent="@android:style/Widget.TextView">
        <item name="android:gravity">center|center_vertical</item>
    </style>

    <style name="CenterJustifyDialogTitle" parent="@android:style/DialogWindowTitle" >
         <item name="android:gravity">center|center_vertical</item>
         <item name="android:textColor">#000000</item>
    </style>

	<style name="CenterJustifyTheme1" parent="@android:style/Theme.Translucent">
        <item name="android:textViewStyle">@style/CenterTextView</item>
        <item name="android:windowTitleStyle">@style/CenterJustifyDialogTitle</item>
    </style>

    <style name="CenterJustifyTheme2" parent="@android:style/Theme.Black">
        <item name="android:textViewStyle">@style/CenterTextView</item>
        <item name="android:windowTitleStyle">@style/CenterJustifyDialogTitle</item>
    </style>

    <style name="CenterJustifyTheme3" parent="@android:style/Theme.Light">
        <item name="android:textViewStyle">@style/CenterTextView</item>
        <item name="android:windowTitleStyle">@style/CenterJustifyDialogTitle</item>
    </style>

</resources>

Now create another java file named “CustomDialog.java” and copy this code into it.
We will apply the theme through this java file.
The theme is located and named in the above xml file.

package com.coderzheaven.pack;
import android.app.AlertDialog;
import android.content.Context;
import com.coderzheaven.pack.R;


public class CustomDialog extends AlertDialog {
		public CustomDialog(Context ctx)
		{
			super(ctx, R.style.CenterJustifyTheme1);
		}
}

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

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.

In the previous post I have showed how to create gradient buttons in android using XML.

This is how we do this in java code.

 Button b = (Button)findViewById(R.id.Button01);
 b.getBackground().setColorFilter(0xFF00FF00, PorterDuff.Mode.MULTIPLY);
 

This is another method of applying gradiant.

b.getBackground().setColorFilter(new LightingColorFilter(0xFF00FF00, 0xFFAA0000));

Please leave your valuable comments.

Hi,

For setting a tilt based gravity using Corona Accelerometer, use the following sample of code.

local function urTiltFunc( event )
        physics.setGravity( 10 * event.xGravity, -10 * event.yGravity )
end

Runtime:addEventListener( "accelerometer", urTiltFunc )

Hi,

For getting touch ‘began’, ‘moved’ & ‘ended’ in Corona, use the following code.

--Your touch event listener
 local function myTouchListener( event )
        if event.phase == "began" then
            print( "Touched!" )
        elseif event.phase == "moved" then
            print( "Touches Moved!" )
        elseif event.phase == "ended" then
            print( "Touches Ended!" )
        end
    end

--Adding an event listener for touch
Runtime:addEventListener( "touch", myTouchListener )

Hi,

For adding a label/text to an image in Corona, using Lua, use the following code,

local urGroup = display.newGroup()

local urImage = display.newImageRect('sample.png',70,70)
urImage.x = 150
urImage.y = 250

local urText = display.newText( "SampleText", 0, 0, "Helvetica", 22 )
urText:setTextColor( 0, 0, 0, 255 )

-- insert items into group, in the order you want them displayed:
urGroup:insert( urImage )
urGroup:insert( urText )

Hi,

In order to search for a particular character in a C++ string, use the following code.

#include <iostream>
#include <cstring>

using namespace std;

int main() {

  const char *testStr= "coderz@heaven";

  const char *temp;

  // Searching
  temp = strchr(testStr, '@');

  if(temp )

      cout << "Found";

  return 0;
}

Hello everyone..
In today’s tutorial I will show you how to use camera in ANDROID in your program.
In this tutorial we will be having a button which will open the camera and after taking the photo it will show it in an imageView.

Note: This program will work only in the real device not in the emulator. So make sure to test it in the device itself. Also make sure to add the permission while using camera as shown below in your AndroidManifest file.

 <uses-feature android:name="android.hardware.camera"></uses-feature>  

Here is the main java file code

package com.coderzheaven;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class OpenCameraDemo extends Activity {

	private static final int CAMERA_PIC_REQUEST = 2500;

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

        Button b = (Button)findViewById(R.id.Button01);
        b.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				 Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
				 startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
			}
		});
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == CAMERA_PIC_REQUEST) {
        	  Bitmap image = (Bitmap) data.getExtras().get("data");
              ImageView imageview = (ImageView) findViewById(R.id.ImageView01);
              imageview.setImageBitmap(image);
        }
    }
}

Now the main.xml file which contains the button and the imageview.

<?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"
    />
<ImageView
	android:id="@+id/ImageView01"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content">
</ImageView>
<Button
	android:text="Open Camera"
	android:id="@+id/Button01"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content">
</Button>
</LinearLayout>

The strings.xml file

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, OpenCameraDemo!</string>
    <string name="app_name">OpenCamera</string>
</resources>

And the AndroidManifest.xml file.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.coderzheaven"
      android:versionCode="1"
      android:versionName="1.0">

      <uses-feature android:name="android.hardware.camera"></uses-feature>

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".OpenCameraDemo"
                  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>

Please leave your valuable comments on this post.

Hi,

For creating a new file using JAVA, use the following code.

import java.io.File;
public class MainClass {

  public static void main(String[] a)throws Exception {

    File myFile = new File("c:\temp\newText.txt");

    myFile.createNewFile();

  }

}

Hi,

For searching for a particular substring from a starting index of a string and get the starting index of it in JAVA, use the following sample of code.

public class MainClass{

  public static void main(String[] arg){

    String myStr = "coderzco";

    int begIndex= 2;

    int myIndex= 0;

    myIndex = str.indexOf("co", begIndex);

    System.out.println(myIndex);
  }

}

It will print out the starting index of the substring ‘co’ (the second ‘co’), that is 6.

Hi,

For searching for a particular character from a string and getting the index of that particular character, use the following code.

public class MainClass{

  public static void main(String[] arg){

    String myStr = "Coderz";

    int strIndex = 0;
    strIndex = myStr.indexOf('o');

    System.out.println(strIndex);
  }

}

It will print out the index of ‘o’, that’s 1.

Hi,

In order to get the UUID of an iPhone, iPod or iPad, do the following in your code.

NSString *myUUIDStr= [UIDevice currentDevice].uniqueIdentifier;

Here ‘myUUIDStr’ will contain the UUID of your specified iOS device.