//为系统设置壁纸
WallpaperManager wallpaperManager = WallpaperManager.getInstance(mContext);
try {
wallpaperManager.setResource(R.drawable.background);
Log.d(TAG, "--------set wallpaper");
} catch (Exception e2) {
// TODO: handle exception
}
记得在AndroidManifest.xml里加权限
<uses-permission android:name="android.permission.SET_WALLPAPER"/>