1

我尝试了一切使用前台服务在后台运行服务，它适用于除中国设备（如vivo、oppo、oneplus）之外的所有设备。一旦应用程序从最近的列表中被终止，这些设备就会终止服务。

甚至前台通知也没有粘性。它是可滑动的。但是，我想在清除后立即再次显示通知，有什么办法吗？

例如，当下载任何文件时，我在 IDM（Internet 下载管理器）之类的应用程序中看到通知仍然可见。即使它被清除，通知也会再次弹出。

如何获得这种类型的功能？

我的代码：

MainActivity.java


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void startService(View v) {
        Intent serviceIntent = new Intent(this, ExampleService.class);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            startForegroundService(serviceIntent);
        } else startService(serviceIntent);
    }

    public void stopService(View v) {
        Intent serviceIntent = new Intent(this, ExampleService.class);
        stopService(serviceIntent);
    }

}

ExampleService.java


    final Handler worker = new Handler();

    @Override
    public void onCreate() {
        super.onCreate();
        Log.d("Foreground Service", "*********** Service Created ***********");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        worker.removeCallbacksAndMessages(null);
        Log.d("Foreground Service", "*********** Service Destroyed ***********");
    }

    @Override
    public int onStartCommand(final Intent intent, int flags, int startId) {
        Intent notificationIntent = new Intent(this, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        final NotificationCompat.Builder notification = new NotificationCompat.Builder(this, App.NOTIFICATION_CHANNEL_ID)
                .setContentTitle("Example Service")
                .setContentText("Working in background")
                .setSmallIcon(android.R.drawable.sym_def_app_icon)
                .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
                .setAutoCancel(false)
                .setOngoing(true)
                .setContentIntent(pendingIntent);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            notification.setCategory(Notification.CATEGORY_PROGRESS);
        }
        startForeground(1, notification.build());

        worker.post(new Runnable() {
            @Override
            public void run() {
                Log.i("Info", Thread.currentThread().getName());
                Toast toast = Toast.makeText(getApplicationContext(), "Service Ping", Toast.LENGTH_SHORT);
                toast.show();
                Log.d("Foreground Service", "*********** Service working ***********");
                worker.postDelayed(this, 5000);
            }
        });
        return START_STICKY;
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}
4

0 回答 0