android 重启app

private void restartApp() {
        Intent intent = mContext.getPackageManager()
                .getLaunchIntentForPackage(mContext.getPackageName());
        PendingIntent restartIntent = PendingIntent.getActivity(mContext, 0, intent, PendingIntent.FLAG_ONE_SHOT);
        AlarmManager mgr = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
        mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent); // 1秒钟后重启应用
        System.exit(0);
    }