SetWallpaper介绍如何在Android获取当前Wallpaper，对Wallpaper做些修改，然后用修改后的图像重新设置Wallpaper。
WallpaperManager用来管理Android的Wallpaper。下面代码通过WallpaperManager来取得当前Wallpaper然后显示在屏幕Layout的imageView上。
[java]
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);
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);
重新设置Wallpaper，也是通过WallpaperManager。
[java]
wallpaperManager.setBitmap(imageView.getDrawingCache());
wallpaperManager.setBitmap(imageView.getDrawingCache());
作者：mapdigit
