CoderzHeaven

Complex JSON String parsing in ANDROID

http://www.coderzheaven.com/2011/06/10/complex-json-string-parsing-in-android/

Parsing JSON Object in ANDROID.

http://www.coderzheaven.com/2011/06/09/parsing-json-objects-in-android/

Hi,

For removing or deleting duplicates from a NSMutableArray , use the following lines of code. It will simply check for duplicates elements and get it deleted or removed.

NSArray *tempArr= [urArray copy];

NSInteger idx = [tempArr count] - 1;

for (id object in [tempArr reverseObjectEnumerator]) {

     if ([urArray indexOfObject:object inRange:NSMakeRange(0, index)] !=NSNotFound) {

           [urArray removeObjectAtIndex:idx];
     }

idx--;

}
[tempArr release];

Hi,

In order to simply set the iPhone/iPad table view transparent use the following line of code.

urTblView.backgroundColor = [UIColor clearColor];

Here ‘urTblView’ is the table view that you want to make transparent. Try it out. This single line will make your table view transparent and looks better.

Hi,

Sometimes during the execution of program you may need to change the z order value of sprite for better working. Use the following sample of code to change the z order value of a sprite in Cocos2D/Box2D iPhone programming.

CCSprite *urSprite = [CCSprite spriteWithFile:@"coderzheavenLogo.png"];
urSprite.position = ccp(240,160);
//First setting the z value to 1
[self addChild:urSprite z:1];
.
.
.
.
.
//After some other executions are over setting z value to 7
[self reorderChild:urSprite z:7];

Hi,

Sometimes you may need to get a sprite using tag while doing a project using Cocos2D. It’s easy to get a sprite by a tag in Cocos2D, use the following code to get it.

tempSprite = (CCSprite*)[self getChildByTag:7];

Here ‘tempSprite’ is your CCSprite and it will get the sprite with tag 7.

Hi,

In order to make a sprite completely invisible , use the following code while using Cocos2D, this code will set the visibility of your sprite to zero.

urSprite.visible = 0; 

In order to make a sprite completely visible, use the following code while using Cocos2D, this code will set the visibility of the sprite back to one.

urSprite.visible = 1; 

Hi,

In order to mute and unmute sound in Cocos2D iPhone, use the following code.

if ([[SimpleAudioEngine sharedEngine] mute]) {
            // This will unmute the sound
            [[SimpleAudioEngine sharedEngine] setMute:0];
}
else {
             //This will mute the sound
             [[SimpleAudioEngine sharedEngine] setMute:1];
}

Hi,

In order to set font and size of a UITextView programmatically use the following code.

self.urTxtView.font = [UIFont fontWithName:@"Zapfino" size:customSize];

IL is Intermediate Language
IL is also known as MSIL (Microsoft Intermediate Language)
or
CIL (Common Intermediate Language)

JIL – IL is converted into machine code by Just-In-Time (JIT) compiler

Hi,

Sometimes you need to check for whether the given string is Palindrome or not. Given below is a sample code to check whether the given string is Palindrome or not using C Sharp/C#.

class Palindrome
{
  static void Main()
  {
      string checkStr, sampleStr;
      char[] temp;

      System.Console.Write("Enter your String: ");

      sampleStr = System.Console.ReadLine();

      checkStr = sampleStr.Replace(" ", "");

      checkStr = checkStr.ToLower();

      temp = checkStr.ToCharArray();

      System.Array.Reverse(temp);

      if(checkStr== new string(temp))
      {
          System.Console.WriteLine(""{0}" is a palindrome.",sampleStr);
      }

      else
      {
          System.Console.WriteLine(""{0}" is NOT a palindrome.",sampleStr);
      }

  }
}

Hi all…….
In today’s exampl e I will show you how to deal with global variables in ANDROID.
You know global variables are those variables that you can access across any variables.
It’s value becomes changed when you change it in any of the classes in your project. These types of variables act as like cookies in a browser to store your login information across different pages. Now Let’s see how to implement this………
For this demo I am using three classes, one is the global class which has the global variable and other two normal classes.
In the global class I have a variable named “global_var” which I am accessing across the other two classes and I am changing the value across the classes. Please check the Logcat for seeing the output.

First class “Global_var_test.java”

package pack.coderzheaven.test;

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

public class Global_var_test extends Activity {

	Button b;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main1);

        b = (Button)findViewById(R.id.Button01);
        GlobalClass global = new GlobalClass();
        System.out.println("var1 value in first class before changing = " + global.global_var1);
        global.global_var1 = "value2";
        System.out.println("var1 value in first class after changing = " + global.global_var1);

        b.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				startActivity(new Intent(Global_var_test.this, SecondClass.class));
			}
		});
    }
}

Next SecondClass.java

package pack.coderzheaven.test;

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

public class SecondClass extends Activity{

		Button b;
		@Override
	    public void onCreate(Bundle savedInstanceState) {
	        super.onCreate(savedInstanceState);
	        setContentView(R.layout.main2);

	        b = (Button)findViewById(R.id.Button01);

	        GlobalClass global = new GlobalClass();
	        System.out.println("var1 value in second class before changing = " + global.global_var1);
	        global.global_var1 = "value3";
	        System.out.println("var1 value in second class after changing = " + global.global_var1);

	        b.setOnClickListener(new OnClickListener() {
				@Override
				public void onClick(View v) {
					startActivity(new Intent(SecondClass.this, SecondClass.class));
				}
			});
	    }

}

Now the GlobalClass.java which holds the global variable.
You can have any datatype as global variable….

package pack.coderzheaven.test;

import android.app.Application;

class GlobalClass extends Application{

	String global_var1 = "Value1";

}

Please check your logcat to see the global value changes…..
Get more ANDROID posts from here
Happy coding………
Please leave your valuable comments………

Hi all…….
In today’s exampl e I will show you how to deal with global variables in ANDROID.
You know global variables are those variables that you can access across any variables.
It’s value becomes changed when you change it in any of the classes in your project. These types of variables act as like cookies in a browser to store your login information across different pages. Now Let’s see how to implement this………
For this demo I am using three classes, one is the global class which has the global variable and other two normal classes.
In the global class I have a variable named “global_var” which I am accessing across the other two classes and I am changing the value across the classes. Please check the Logcat for seeing the output.

First class “Global_var_test.java”

package pack.coderzheaven.test;

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

public class Global_var_test extends Activity {

	Button b;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main1);

        b = (Button)findViewById(R.id.Button01);
        GlobalClass global = new GlobalClass();
        System.out.println("var1 value in first class before changing = " + global.global_var1);
        global.global_var1 = "value2";
        System.out.println("var1 value in first class after changing = "; + global.global_var1);

        b.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				startActivity(new Intent(Global_var_test.this, SecondClass.class));
			}
		});
    }
}

Next SecondClass.java

package pack.coderzheaven.test;

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

public class SecondClass extends Activity{

		Button b;
		@Override
	    public void onCreate(Bundle savedInstanceState) {
	        super.onCreate(savedInstanceState);
	        setContentView(R.layout.main2);

	        b = (Button)findViewById(R.id.Button01);

	        GlobalClass global = new GlobalClass();
	        System.out.println("var1 value in second class before changing = " + global.global_var1);
	        global.global_var1 = "value3";
	        System.out.println("var1 value in second class after changing = " + global.global_var1);

	        b.setOnClickListener(new OnClickListener() {
				@Override
				public void onClick(View v) {
					startActivity(new Intent(SecondClass.this, SecondClass.class));
				}
			});
	    }

}

Now the GlobalClass.java which holds the global variable.
You can have any datatype as global variable….

package pack.coderzheaven.test;

import android.app.Application;

class GlobalClass extends Application{

	String global_var1 = "Value1"

}

Please leave your valuable comments………

Hi,

We have discussed here copying a file using FileInfo. Now we are going to see how we can do the same without using FileInfo in C Sharp/C#.

using System;
using System.IO;

class MainClass {
  public static void Main(string[] args) {

    int i;
    FileStream fileIn;
    FileStream fileOut;

    try {
      fileIn = new FileStream("opFile.txt", FileMode.Open);
    }
    catch(FileNotFoundException exc) {
      Console.WriteLine(exc.Message + "nFile Not Found");
      return;
    }

    try {
      fileOut = new FileStream("clFile.txt", FileMode.Create);
    }
    catch(IOException exc) {
      Console.WriteLine(exc.Message + "nError Opening File");
      return;
    }

    try {
      do {
        i = fileIn.ReadByte();
        if(i != -1)
           fileOut.WriteByte((byte)i);
      } while(i != -1);
    }
    catch(IOException exc) {
      Console.WriteLine(exc.Message + "Error");
    }

    fileIn.Close();
    fileOut.Close();
  }
}

Hi,

For copying a file using FileInfo in C Sharp/C#, use the following code. For copying a file without using file info check the example given here.

using System;
using System.IO;

public class MainClass
{
  static void Main(string[] args)
  {

    FileInfo testFile = new FileInfo(@"c:NewWorkstestOld.txt");

    testFile.Create();

    testFile.CopyTo(@"c:NewProjtestNew.txt");

  }
}

The FlowLayout class puts components in a row, sized at their preferred size.

Creates a new flow layout manager with the indicated alignment and the indicated horizontal and vertical gaps. The hgap and vgap arguments specify the number of pixels to put between components.

import java.applet.*;
import java.awt.*;
/*
  <applet code="FlowLayoutApplet" width=300 height=200>
  </applet>
*/

public class test extends Applet
{

  public void init()
  {
    setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
    for (int i = 0; i < 20; i++)
    {
    	add(new Button("Button" + i));
    }
  }
}

The output window look like this

Hello all……..
In today’s post I will show you send mail from an android application progrmatically..
Let’s go to the code fast……
This is the code in the mail java file….

package com.coderzheaven;

import android.app.Activity;
import android.content.Intent;
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 sendMailDemo extends Activity {
    Button send;
    EditText address, subject, emailbody;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        address = (EditText) findViewById(R.id.address);
        subject = (EditText) findViewById(R.id.subject);
        emailbody = (EditText) findViewById(R.id.body);
        send = (Button) findViewById(R.id.send);

        send.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
            	sendEmail();
            }
        });
    }

    public void sendEmail(){

    	if(!address.getText().toString().trim().equalsIgnoreCase("")){
    	  final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
	      emailIntent.setType("plain/text");
	      emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{ address.getText().toString()});
	      emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject.getText());
	      emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, emailbody.getText());
	      sendMailDemo.this.startActivity(Intent.createChooser(emailIntent, "Send mail..."));
	    }
    	else{
    		Toast.makeText(getApplicationContext(), "Please enter an email address..", Toast.LENGTH_LONG).show();
    	}
      }
	}

Now the layout file (main.xml)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent"
	android:layout_height="fill_parent"
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical"
	android:background="@drawable/android"
	>
	<TextView
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:id="@+id/emailaddress"
		android:text="Email Address"
		android:textStyle="bold">
	</TextView>

	<EditText
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:width="250dip"
		android:hint="email address"
		android:id="@+id/address">
	</EditText>

	<TextView
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:text="Subject"
		android:textStyle="bold">
	</TextView>

	<EditText
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:width="250dip"
		android:hint="Subject"
		android:id="@+id/subject">
	</EditText>

	<TextView
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:text="Your Message"
		android:textStyle="bold">
	</TextView>
	<EditText
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:lines="5"
		android:hint="Your message here!!"
		android:id="@+id/body">
	</EditText>
	<Button
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:id="@+id/send"
		android:text="Send Email"
		android:width="150dip">
	</Button>
</LinearLayout>

The AndroidManifest.xml

<?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">
    <application android:icon="@drawable/icon" android:label="Send Mail Demo">
        <activity android:name=".sendMailDemo"
                  android:label="Send Mail Demo">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

Note: However if you test this in your emulator, it will not work. Install it in your device to test it.