本篇主要讲下如何设置系统桌面壁纸.
代码如下:

    public static void setLauncherWallPaper(Context context, Bitmap bitmap) throws IOException {if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {final int result;try {result = WallpaperManager.getInstance(context).setBitmap(bitmap, null, false, WallpaperManager.FLAG_SYSTEM);} catch (Throwable e) {throw new IOException(e);}if (result == 0) {throw new IOException("setLauncherWallPaper failed");}} else {try {WallpaperManager.getInstance(context).setBitmap(bitmap);} catch (Throwable e) {throw new IOException(e);}}}

本地调用如下:

    Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.wallpaper);try {setLauncherWallPaper(this,bitmap);} catch (IOException e) {e.printStackTrace();}