AndroidSetWallpaper.doc

Setting wallpaper - 
•	Copy some images in folder drawable-hdpi like a.jpg, b.jpg etc.
•	add following controls to layout
o	ImageView1(width-200dp, height=200dp)
o	Button1
o	Add scroll view and linear layout
<HorizontalScrollView 
android:layout_width="200dp" 
android:layout_height="wrap_content" 
android:layout_gravity="center">
<LinearLayout 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
          android:orientation="horizontal">
•	Add some images in <LinearLayout> </LinearLayout> and define size 125dp X 100dp.
<ImageView
        android:id="@+id/imageView2"
        android:layout_width="125dp"
        android:layout_height="100dp"
        android:src="@drawable/a"
 android:padding="10dp" />
•	Write following java code
ImageView display;
    int toPhone;
    public void onCreate(Bundle b) 
    {
        super.onCreate(b);
        setContentView(R.layout.main);
        
        display=(ImageView ) findViewById(R.id.imageView1);
        ImageView i1,i2,i3,i4,i5,i6,i7,i8;
        i1=(ImageView ) findViewById(R.id.imageView2);
        i2=(ImageView ) findViewById(R.id.imageView3);
        i3=(ImageView ) findViewById(R.id.imageView4);
        i4=(ImageView ) findViewById(R.id.imageView5);
        i5=(ImageView ) findViewById(R.id.imageView6);
        i6=(ImageView ) findViewById(R.id.imageView7);
        i7=(ImageView ) findViewById(R.id.imageView8);
        i8=(ImageView ) findViewById(R.id.imageView9);
        
        Button btnSetWallpaper=(Button) findViewById(R.id.button1);
        btnSetWallpaper.setOnClickListener(new A());
        
        toPhone=R.drawable.a;
        
        i1.setOnClickListener(new A());
        i2.setOnClickListener(new A());
        i3.setOnClickListener(new A());
        i4.setOnClickListener(new A());
        i5.setOnClickListener(new A());
        i6.setOnClickListener(new A());
        i7.setOnClickListener(new A());
        i8.setOnClickListener(new A());
        
        
    }
    class A implements View.OnClickListener
    {

		public void onClick(View v) 
		{
			switch(v.getId())
			{
				case R.id.imageView2 :
					display.setImageResource(R.drawable.a);
					toPhone=R.drawable.a;
					break;
				case R.id.imageView3 :
					display.setImageResource(R.drawable.b);
					toPhone=R.drawable.b;
					break;
				case R.id.imageView4 :
					display.setImageResource(R.drawable.c);
					toPhone=R.drawable.c;
					break;
				case R.id.imageView5 :
					display.setImageResource(R.drawable.d);
					toPhone=R.drawable.d;
					break;
				case R.id.imageView6 :
					display.setImageResource(R.drawable.e);
					toPhone=R.drawable.e;
					break;
				case R.id.imageView7 :
					display.setImageResource(R.drawable.f);
					toPhone=R.drawable.f;
					break;
				case R.id.imageView8 :
					display.setImageResource(R.drawable.g);
					toPhone=R.drawable.g;
					break;
				case R.id.imageView9 :
					display.setImageResource(R.drawable.h);
					toPhone=R.drawable.h;
					break;
				case R.id.button1:
					Bitmap whatever=BitmapFactory.decodeStream(getResources().openRawResource(toPhone));
					try
					{
						getApplicationContext().setWallpaper(whatever);
					}
					catch(Exception e)
					{
						e.printStackTrace();
					}
					break;
			}
		}
    	}
Here a,b,c,d,e,f,g,h are names of images.		
•	Set the permission of setting wallpaper, update the manifest file and following permission in code of manifest.
<uses-permission android:name="android.permission.SET_WALLPAPER" />
•