Question

我似乎无法接收我在Android上杀死应用后从FCM控制台发送的FCM推送通知，例如长按“概述”按钮并滑动要杀死的应用。当应用程序在前台或后台运行时，它可以正常工作。这似乎是一个重复的问题，但我尝试过其他方法，但我似乎仍然无法得到它。

NotificationService.java

public class NotificationService extends FirebaseMessagingService
{

private static final String TAG = "FCM Service";
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {

    Log.d(TAG, "From: " + remoteMessage.getFrom());
    Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());
    sendNotification(remoteMessage.getNotification().getBody());
}

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);
        android.support.v4.app.NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("Firebase")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

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

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

TokenRefresh.java

public class TokenRefresh extends FirebaseInstanceIdService {

private static final String TAG = "FirebaseIDService";

@Override
public void onTokenRefresh() {
    // Get updated InstanceID token.
    String refreshedToken = FirebaseInstanceId.getInstance().getToken();
    Log.d(TAG, "Refreshed token: " + refreshedToken);

    // TODO: Implement this method to send any registration to your app's servers.
    sendRegistrationToServer(refreshedToken);
}

/**
 * Persist token to third-party servers.
 *
 * Modify this method to associate the user's FCM InstanceID token with any server-side account
 * maintained by your application.
 *
 * @param token The new token.
 */
private void sendRegistrationToServer(String token) {
    // Add custom implementation, as needed.

}

}

MainActivity.java

public class MainActivity extends AppCompatActivity {

Context context;

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


    FirebaseMessaging.getInstance().subscribeToTopic("global");

    String token = ("fcm"+ FirebaseInstanceId.getInstance().getToken());


}

}

Answer 1

我有完全相同的问题。通知在前台和后台模式中表现得很好，但在应用程序被杀死时却没有。最终我发现了这个：https://github.com/firebase/quickstart-android/issues/41#issuecomment-306066751

问题在于Android Studio中的调试模式。要正确测试您的通知，请执行以下操作：在Android Studio中通过调试运行您的应用。滑动即可将其杀死。通过手机上的启动器图标重新启动应用。再次滑动它（因此它被杀死）。

发送您的通知，现在您将看到它！

希望这能解决你的问题。

Answer 2

尝试将BroadcastReceiver添加到MainActivity.java

BroadcastReceiver mRegistrationBroadcastReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {

                // checking for type intent filter
                if (intent.getAction().equals(Config.REGISTRATION_COMPLETE)) {
                    // gcm successfully registered
                    // now subscribe to `global` topic to receive app wide notifications
                    FirebaseMessaging.getInstance().subscribeToTopic(Config.TOPIC_GLOBAL);

                    displayFirebaseRegId();

                } else if (intent.getAction().equals(Config.PUSH_NOTIFICATION)) {
                    // new push notification is received

                    String message = intent.getStringExtra("message");

                    Toast.makeText(getApplicationContext(), "Push notification: " + message, Toast.LENGTH_LONG).show();

                    txtMessage.setText(message);
                }
            }
        };

        displayFirebaseRegId();
    }

    // Fetches reg id from shared preferences
    // and displays on the screen
    private void displayFirebaseRegId() {
        SharedPreferences pref = getApplicationContext().getSharedPreferences(Config.SHARED_PREF, 0);
        String regId = pref.getString("regId", null);

        Log.e(TAG, "Firebase reg id: " + regId);

        if (!TextUtils.isEmpty(regId))
            txtRegId.setText("Firebase Reg Id: " + regId);
        else
            txtRegId.setText("Firebase Reg Id is not received yet!");
    }

    @Override
    protected void onResume() {
        super.onResume();

        // register GCM registration complete receiver
        LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
                new IntentFilter(Config.REGISTRATION_COMPLETE));

        // register new push message receiver
        // by doing this, the activity will be notified each time a new message arrives
        LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
                new IntentFilter(Config.PUSH_NOTIFICATION));

        // clear the notification area when the app is opened
        NotificationUtils.clearNotifications(getApplicationContext());
    }

    @Override
    protected void onPause() {
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver);
        super.onPause();
    }
}

Answer 3

您需要标记您的 Firebase 服务类，以免与您的主应用一起被杀死。

    ComponentName componentName = new ComponentName(
            applicationContext,
            FCMService.class);

    applicationContext.getPackageManager().setComponentEnabledSetting(
            componentName,
            PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
            PackageManager.DONT_KILL_APP);

你可以check this real implementation in Java

Answer 4

尝试更改标记

 Intent intent = new Intent(this, MainActivity.class);
    intent.addFlags(Intent.FLAG_FROM_BACKGROUND);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
            PendingIntent.FLAG_ONE_SHOT);

应用程序被杀后推送通知

4 个答案: