Android Firebase通知消息已收到，但未显示通知提示？

Question

I have followed this tutorial and when I try to send a message from Firebase console, onMessageReceived were called and createNotification were performed, no notification prompt shows up.

It suppose to prompt this but it didn't

Below is my MyAndroidFirebaseMsgService code

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.media.RingtoneManager;
import android.net.Uri;
import android.support.v4.app.NotificationCompat;
import android.util.Log;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

import java.util.HashMap;
public class MyAndroidFirebaseMsgService extends FirebaseMessagingService
{
  private static final String TAG = "MyAndroidFCMService";
  @Override
  public void onMessageReceived(RemoteMessage remoteMessage) {
    //Log data to Log Cat
    Log.d(TAG, "From: " + remoteMessage.getFrom());
    Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());
    //create notification
    createNotification(remoteMessage.getNotification().getBody());
  }

  private void createNotification( String messageBody)
  {
    Intent intent = new Intent( this , ResultActivity.class );
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent resultIntent = PendingIntent.getActivity( this , 0, intent, PendingIntent.FLAG_ONE_SHOT);

    Uri notificationSoundURI = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder mNotificationBuilder = new NotificationCompat.Builder( this)
        .setSmallIcon(R.mipmap.ic_launcher)
        .setContentTitle("Test Notification")
        .setContentText(messageBody)
        .setAutoCancel( false )
        .setSound(notificationSoundURI)
        .setContentIntent(resultIntent);

    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(0, mNotificationBuilder.build());
  }
}

Answer 1

最终发现该通知实际上仅出现在android下拉菜单中，而不是由于我的设备运行的是Android 4而弹出。我再次使用Android 5设备进行测试，并且该通知如本教程一样弹出。

Answer 2

Maybe you were missing notification notify.
Please try bellow code. it's working properly

//This method is only generating push notification
    //It is same as we did in earlier posts
    private void sendNotification(RemoteMessage remoteMessage) {
        Intent resultIntent = new Intent(this, MenuBarActivity.class);
        resultIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        HashMap<String, String> dataMap = new HashMap<String, String>(remoteMessage.getData());
        resultIntent.putExtra(Constant.KEY_MESSAGE_BODY, dataMap);
        resultIntent.putExtra(Constant.KEY_IS_NOTIFICATION, true);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, resultIntent,
                PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(getString(R.string.app_name))
                .setStyle(new NotificationCompat.BigTextStyle().bigText(remoteMessage.getData().get(Constant.KEY_BODY)))
                .setContentText(remoteMessage.getData().get(Constant.KEY_BODY))
                .setAutoCancel(true)
                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))
                .setSound(defaultSoundUri);

//        if (!BaseActivity.isInForeground()) {
        notificationBuilder.setContentIntent(pendingIntent);
//        }
        // Generate ID
        long time = new Date().getTime();
        String tmpStr = String.valueOf(time);
        String last4Str = tmpStr.substring(tmpStr.length() - 5);
        int notificationId = Integer.valueOf(last4Str);

        // Sets an ID for the notification
//            int notificationId = Constant.NOTIFICATION_ID;

        // Gets an instance of the NotificationManager service
        NotificationManager mNotifyMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

        // Builds the notification and issues it.
        mNotifyMgr.notify(notificationId, notificationBuilder.build());
    }