wallpaperSWAP

Create a wallpaperSWAP in android
WRITE A CODE IN 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:textAppearance="?android:attr/textAppearanceLarge"
android:text="@string/Change"
android:layout_height="wrap_content"
android:id="@+id/textView1"
android:layout_width="match_parent">
</TextView>

<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RadioButton
android:layout_height="wrap_content"
android:id="@+id/radio0" android:text="@string/onem"
android:checked="true"
android:layout_width="match_parent">
</RadioButton>
<RadioButton
android:layout_height="wrap_content"
android:id="@+id/radio1"
android:text="@string/five"
android:layout_width="match_parent">
</RadioButton>
<RadioButton
android:layout_height="wrap_content"
android:id="@+id/radio2"
android:text="@string/ten"
android:layout_width="match_parent">
</RadioButton>
<RadioButton
android:layout_height="wrap_content"
android:id="@+id/radio3"
android:text="@string/thirty"
android:layout_width="match_parent">
</RadioButton>
<RadioButton
android:layout_height="wrap_content"
android:id="@+id/radio4"
android:text="@string/oneh"
android:layout_width="match_parent">
</RadioButton>

</RadioGroup>

<Button
android:layout_height="wrap_content"
android:text="@string/Set" android:id="@+id/button1"
android:layout_width="match_parent"
android:textSize="25sp">
</Button>

<Button
android:layout_height="wrap_content"
android:text="@string/Unset" android:id="@+id/button2"
android:layout_width="match_parent"
android:textSize="25sp">
</Button>

</LinearLayout>

WALLPAPERMAIN.java

package com.example.wallswap;

import android.app.Activity;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.content.Intent;

import android.os.Bundle;

public class WallSwapActivity extends Activity {

    /** Called when the activity is first created. */

private Button mSetButton;

private Button mUnsetButton;

private RadioButton mOneMinRadio;

private RadioButton mFiveMinRadio;

private RadioButton mTenMinRadio;

private RadioButton mThirtyMinRadio;

private RadioButton mOneHourRadio;

private RadioGroup mTimeRadioGroup;

public int mChangeTime = 60;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        mSetButton = (Button)findViewById(R.id.button1);

        mUnsetButton = (Button)findViewById(R.id.button2);

        mOneMinRadio = (RadioButton)findViewById(R.id.radio0);

        mFiveMinRadio = (RadioButton)findViewById(R.id.radio1);

        mTenMinRadio = (RadioButton)findViewById(R.id.radio2);

        mThirtyMinRadio = (RadioButton)findViewById(R.id.radio3);

        mOneHourRadio = (RadioButton)findViewById(R.id.radio4);

        mTimeRadioGroup = (RadioGroup)findViewById(R.id.radioGroup1);

        mUnsetButton.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View arg0) {

            // TODO Auto-generated method stub

            Intent mDisableIntent = new Intent(WallSwapActivity.this, WallpaperChangeService.class);

            stopService(mDisableIntent);

            finish();

        }

        });

        mSetButton.setOnClickListener(new OnClickListener() {

        @Override

        /* Set the value of mChangeTime variable according to the radio button selected by the user */

        public void onClick(View arg0) {

        int mRadioID = mTimeRadioGroup.getCheckedRadioButtonId();

        if(mOneMinRadio.getId()==mRadioID){mChangeTime=60;}

        else if(mFiveMinRadio.getId()==mRadioID){mChangeTime=5*60;}

        else if(mTenMinRadio.getId()==mRadioID){mChangeTime=10*60;}

        else if(mThirtyMinRadio.getId()==mRadioID){mChangeTime=30*60;}

        else if(mOneHourRadio.getId()==mRadioID){mChangeTime=60*60;}

        /* Create an intent destined for the service */

        Intent mServiceIntent = new Intent(WallSwapActivity.this, WallpaperChangeService.class);

        /* Create a bundle and store in it a key-value pair specifying the time after which the wallpaper needs to be changed. */

        Bundle mBundleTime = new Bundle();

        mBundleTime.putInt("time", mChangeTime);

        /* Attach the bundle to the intent */

        mServiceIntent.putExtras(mBundleTime);

        /* Start the service */

        startService(mServiceIntent);

        /* End the activity */

        finish();

        }

        });

    }

}

WALLPAERCHANGESERVICES.JAVA

package com.example.wallswap;

import android.app.Service;

import android.os.Bundle;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.content.Intent;

import android.os.IBinder;

public class WallpaperChangeService extends Service implements Runnable {

/* Store references to the wallpaper images in an array */

private int wallpaperId[] = {R.drawable.wallpaper1,R.drawable.wallpaper2};

/* Declare a variable to store the time selected by the user */

private int time;

/* Declare a flag to check which image to display next */

private int FLAG=0;

private Thread t;

/* Declare two bitmap objects to store the wallpaper images */

private Bitmap bitmap;

private Bitmap bitmap1;

@Override

public IBinder onBind(Intent arg0) {

// TODO Auto-generated method stub

return null;

}

/* The overridden onStartCommand() method */

@Override

public int onStartCommand(Intent intent, int flag,int startId)

{

super.onStartCommand(intent,flag, startId);

/* Obtain the bundle sent along with the intent sent from the activity */

Bundle bundle=intent.getExtras();

/* Obtain the value of the time key */

time = bundle.getInt("time");

/* Initialize the Bitmap objects with the wallpaper images */

bitmap=BitmapFactory.decodeResource(getResources(),wallpaperId[0]);

bitmap1=BitmapFactory.decodeResource(getResources(),wallpaperId[1]);

/* Start a new thread to keep the service running in the background. */

t = new Thread(WallpaperChangeService.this);

t.start();

return 0;

}

/* The overridden onDestroy() method */

@Override

public void onDestroy(){

super.onDestroy();

System.exit(0);

}

/* The run() method containing code that is executed by the newly created 

thread */

@Override

public void run() {

// TODO Auto-generated method stub

try {

while(true){

if(FLAG==0) {

this.setWallpaper(bitmap);

FLAG++;

}

else{

this.setWallpaper(bitmap1);

FLAG--;

}

Thread.sleep(1000*time);

}

} catch (Exception e){

e.printStackTrace();

}

}

}