在Android中单击Firebase通知时将数据发送到活动

Question

In my application I want use fireBase for notification .
I want when click on notification (when app is closed, my mean is app is background ) send data with putExtra to mainActivity .
I write below codes, but when click on notification (in app is background) but show me null for getStringExtra !

MyNotificationManager class :

public class MyNotificationManager {

    private Context mCtx;
    private Uri soundUri;
    private static MyNotificationManager mInstance;

    public MyNotificationManager(Context context) {
        mCtx = context;
    }

    public static synchronized MyNotificationManager getInstance(Context context) {
        if (mInstance == null) {
            mInstance = new MyNotificationManager(context);
        }
        return mInstance;
    }

    public void displayNotification(String title, String body) {

        soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        Intent intent = new Intent(mCtx, MainActivity.class);
        intent.putExtra("fcm_notification", "Y");

        PendingIntent pendingIntent = PendingIntent.getActivity(mCtx, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mCtx, Constants.NOTIF_CHANNEL_ID)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(title)
                .setSound(soundUri)
                .setAutoCancel(true)
                .setVibrate(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400})
                .setContentText(body)
                .setContentIntent(pendingIntent);

        NotificationManager mNotifyMgr = (NotificationManager) mCtx.getSystemService(NOTIFICATION_SERVICE);

        if (mNotifyMgr != null) {
            mNotifyMgr.notify(1, mBuilder.build());
        }
    }
}

MyFirebaseMessagingService class :

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        showNotify(remoteMessage.getFrom(), remoteMessage.getNotification().getBody());
    }

    private void showNotify(String title, String body) {
        MyNotificationManager myNotificationManager = new MyNotificationManager(getApplicationContext());
        //myNotificationManager.displayNotification(title, body);
        myNotificationManager.displayNotification(title, body);
    }
}

MainActivity class :

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

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            checkIntent();
        }
    }, 1000);
}

private boolean checkIntent() {
    String value = getIntent().getStringExtra("fcm_notification");
    Toast.makeText(context, "" + value, Toast.LENGTH_SHORT).show();

    if (value == null) return false;

    if (value.equals("Y")) {
        startActivity(new Intent(this, LandingActivity.class));
        // open one activity.

    } else if (value.equals("another thing")) {
        // open another activity.
    }

    finish();
    return true;
}

When click on notification (on app is background) , show me null message in Toast for this line String value = getIntent().getStringExtra("fcm_notification");

How can i fix it?

Answer 1

When sending notification from console, add the custom data from 'Advanced options':

For some reason, firebase doesn't allow the key to start with fcm. You cannot use fcm_notification . Use a different key.

For above image, receive the key as follows:

String value = getIntent().getStringExtra("test_key");

Answer 2

Try this:

Intent intent = new Intent(mCtx, MainActivity.class);
intent.putExtra("EXTRA_DATA", title);

And to get:

String value = getIntent().getStringExtra("EXTRA_DATA");

Better to change the key. Also, it seems like you'll need to send a data from console and then, sending the data to the another Activity .

I've used the current notification title to check if it returns the title or not.If it returned the value, so, try sending data from the console.