android 背景设置

public static final String TAG = "WallpaperActivity";

/**
* 背景图片名称
*/
private static final String FILE_NAME = "MM-320x480.png";

/**
* @see android.app.Activity#onCreate(android.os.Bundle)
*/
public void onCreate(Bundle cycle) {
super.onCreate(cycle);
super.setContentView(R.layout.wallpaper);

// 取得背景图片
Bitmap wallpaper = this.getWallpager();

// 设置桌面背景
this.putWallpaper(wallpaper);
}

/**
* 取得SDCard中的背景图片
*/
private Bitmap getWallpager() {
// SDCard的路径，也就是“/sdcard/”
File root = Environment.getExternalStorageDirectory();
// MM图片
File wall = new File(root, FILE_NAME);
// MM图片路径
String path = wall.getAbsolutePath();

Log.d(TAG, "MM文件路径为：" + path);

return BitmapFactory.decodeFile(path);
}

/**
* 设置桌面背景
*/
private void putWallpaper(Bitmap bitmap) {
try {
WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
wallpaperManager.setBitmap(bitmap);
} catch (IOException e) {
String msg = "设置桌面背景发生异常:" + e.getLocalizedMessage();
Log.e(TAG, "设置桌面背景发生异常！", e);
Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
}

}

增加权限

    在AndroidManifest.xml文件中增加设置桌面背景权限：

   
    
    
    
    

    
     
     
     
     <!--
    
     
     
     
      设置桌面背景的权限 
    
     
     
     
     -->
    
     
     
     
      
    
     
     
     
     <
    
     
     
     
     uses-permission 
    
     
     
     
     android:name
    
     
     
     
     ="android.permission.SET_WALLPAPER"
    
     
     
     
      
    
     
     
     
     />