当Android应用程序从最近的托盘中删除时,Firebase(FCM)通知不会出现

Question

我正在通过我自己的Web服务发送Firebase通知,如下所示.

$url = 'https://fcm.googleapis.com/fcm/send';
        $fields = array(
             'registration_ids' => $tokens,
             'data' => $message
            );
        $headers = array(
            'Authorization:key = SERVER_KEY ',
            'Content-Type: application/json'
            );

1.当App在前台和后台没有任何问题时,通知即将到来,但如果我从最近的托盘中删除应用程序然后通知没有到来,我必须处理这个任何解决方案吗？(就像Whatsup通知显示所有场景甚至我强制停止此应用程序的设置)

2.一旦我收到通知,从"onMessageReceived"如何将这些消息,正文内容传递给我的Activity/Fragments？

3.在某些情况下,我想向所有人发送通知,而不是将所有令牌添加到数组中.任何其他方式处理像"发送给所有"这样的东西？

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    private static final String TAG = "MsgService";
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Log.d(TAG, "From: " + remoteMessage.getFrom());
        Log.d(TAG, "Data Payload : " + remoteMessage.getData());
        sendNotification(remoteMessage.getData().get("message"));
    }
    private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);
        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("Firebase Push Notification")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0, notificationBuilder.build());
    }
} 

设备失败:( 从Recent Tray中删除后通知不会出现)

• MI Redmi Note 2(5.0.2 Lollipop)
• 华为荣誉5c(5.1.1棒棒糖)

成功设备:(从最近的托盘中删除通知后)

• HTC One X(4.2果冻豆)
• 三星galaxy grand prime(4.4 Kitkat)

Answer 1

1.当App在前台和后台没有任何问题时,通知即将到来,但如果我从最近的托盘中删除应用程序然后通知没有到来,我必须处理这个任何解决方案吗？(就像Whatsup通知显示所有场景甚至我强制停止此应用程序的设置)

根据您的代码,您必须获取空指针异常,remoteMessage.getNotification().getBody()因为您没有发送通知,而是从curl请求发送数据有效负载.根据我的个人经验,您刚才提到的问题尤其在Android Kitkat或以下设备中出现.在棒棒糖或以上Firebase推动似乎工作正常.

2.一旦我收到通知,从"onMessageReceived"如何将这些消息,正文内容传递给我的Activity/Fragments？

您可以onMessageReceived()在活动中发出广播并注册Braodcast接收器,并以广播意图发送数据.示例代码:

活动

private BroadcastReceiver receiver;

@Overrride
public void onCreate(Bundle savedInstanceState){

  // your oncreate code

  IntentFilter filter = new IntentFilter();
  filter.addAction("SOME_ACTION");

  receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
      String message = intent.getStringExtra("message");
    }
  };
     registerReceiver(receiver, filter);
}

 @Override
 protected void onDestroy() {
  if (receiver != null) {
   unregisterReceiver(receiver);
   receiver = null
  }
  super.onDestroy();
 }

FirebaseMessagingService

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    private static final String TAG = "MsgService";
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Log.d(TAG, "From: " + remoteMessage.getFrom());
        Log.d(TAG, "Notification Message Body: " + remoteMessage.getData());

        Intent intent=new Intent();
        intent.setAction("SOME_ACTION");
        intent.putExtra("message", remoteMessage.getNotification().getBody());
        sendBroadcast(intent);
    }
} 

3.在某些情况下,我想向所有人发送通知,而不是将所有令牌添加到数组中.任何其他方式处理像"发送给所有"这样的东西？

Firebase API中没有"发送给所有人",唯一的方法是使用Firebase控制台,它有自己的问题来处理白色图标问题,并翻录通知的自定义参数.