RootCommand("su -c 'screencap /mnt/sdcard/screenaaa.png' && adb pull /sdcard/screenaaa.png") ;
 
/**
     * 应用程序运行命令获取 Root权限，设备必须已破解(获得ROOT权限)
     *
     * @param command
     *            命令：String apkRoot="chmod 777 "+getPackageCodePath();
     *            RootCommand(apkRoot);
     * @return 应用程序是/否获取Root权限
     */
    private boolean RootCommand(String command) {
        Process process = null;
        DataOutputStream os = null;
        try {
            process = Runtime.getRuntime().exec("su");
            os = new DataOutputStream(process.getOutputStream());
            os.writeBytes(command + "\n");
            os.writeBytes("exit\n");
            os.flush();
            process.waitFor();
        } catch (Exception e) {
            Log.d("*** DEBUG ***", "ROOT REE" + e.getMessage());
            return false;
        } finally {
            try {
                if (os != null) {
                    os.close();
                }
                process.destroy();
            } catch (Exception e) {
            }
        }
        Log.d("*** DEBUG ***", "Root SUC ");
        return true;
    }