WallpaperManager.java:
 
frameworks\base\core\java\android\app\WallpaperManager.java
 

 
 
WallpaperManagerService.java:
 
 
frameworks\base\services\java\com\android\server\WallpaperManagerService.java
 
 

 
 
默认壁纸资源
 
frameworks\base\core\res\res\drawable-nodpi

WallpaperManager: Provides access to the system wallpaper. With WallpaperManager, you can get the current wallpaper, get the desired dimensions for the wallpaper, set the wallpaper, and more. Get an instance of WallpaperManager with getInstance().
 
 
 
Sample code:
 
public class SetWallpaperActivity extends Activity {
    final static private int[] mColors =
            {Color.BLUE, Color.GREEN, Color.RED, Color.LTGRAY, Color.MAGENTA, Color.CYAN,
                    Color.YELLOW, Color.WHITE};
    /**
     * Initialization of the Activity after it is first created.  Must at least
     * call {@link android.app.Activity#setContentView setContentView()} to
     * describe what is to be displayed in the screen.
     */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // Be sure to call the super class.
        super.onCreate(savedInstanceState);
        // See res/layout/wallpaper_2.xml for this
        // view layout definition, which is being set here as
        // the content of our screen.
        setContentView(R.layout.wallpaper_2);
        final WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
        final Drawable wallpaperDrawable = wallpaperManager.getDrawable();
        final ImageView imageView = (ImageView) findViewById(R.id.imageview);
        imageView.setDrawingCacheEnabled(true);
        imageView.setImageDrawable(wallpaperDrawable);
        Button randomize = (Button) findViewById(R.id.randomize);
        randomize.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                int mColor = (int) Math.floor(Math.random() * mColors.length);
                wallpaperDrawable.setColorFilter(mColors[mColor], PorterDuff.Mode.MULTIPLY);
                imageView.setImageDrawable(wallpaperDrawable);
                imageView.invalidate();
            }
        });
        Button setWallpaper = (Button) findViewById(R.id.setwallpaper);
        setWallpaper.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                try {
                    wallpaperManager.setBitmap(imageView.getDrawingCache());
                    finish();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });
    }
} 

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wallpaper1
 
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l2=Label(text='输出文件名')
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l3=Label(text='编码/解码格式')
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l1.pack()
entin.pack()
l2.pack()
entout.pack()
l3.pack()
enttype.pack()
jcv=Canvas(root,bg='blue',height=200,width=600)
jcv.place(x=50,y=250,anchor='nw')
jcv.create_text(1,1,text="")