How to use it on Android

[mattkhaw]

How to use it on Android

[mozhn]

I simply did something but I cannot get it to work when the application is closed.

OneSignalPush.java file:

  @Override
   public void notificationReceived(OSNotification notification) {
     try {
       if (notification.payload.additionalData.getJSONObject("Caller") != null) {
         JSONObject data = notification.payload.additionalData.getJSONObject("Caller");
         System.out.println(data.getString("Username"));
         System.out.println(data.getString("ConnectionId"));
         CordovaCall.getInstance().notificationAccept(data.getString("Username"));
       }
     } catch (JSONException e) {
       e.printStackTrace();
     }

     try {
       CallbackHelper.callbackSuccess(jsNotificationReceivedCallBack, new JSONObject(notification.stringify()));
     }
     catch (Throwable t) {
       t.printStackTrace();
     }
   }

CordovaCall.java file:

    public void notificationAccept(String username) {
        from = username;
        permissionCounter = 2;
        pendingAction = "receiveCall";
        this.checkCallPermission();
    }

[mattkhaw]

You need to specify what to do after you receive the notification. In this case, you need to force the app to open upon receiving the notification. This is as far as I go. The rest is native implementation.

[mozhn]

With the application closed, I was able to receive and process the notification. The problem is auto start.
firebase/quickstart-android#822 (comment)

I don't know much about Java, so I wrote a simple code. If I try to open the call acceptance screen with the code I wrote, I get this error.

2020-11-12 14:45:35.977 18947-19005/? E/AndroidRuntime: FATAL EXCEPTION: Firebase-MyFirebaseMessagingService
    Process: com.blabla.blabla, PID: 18947
    java.lang.NullPointerException: Attempt to invoke virtual method 'void com.dmarc.cordovacall.CordovaCall.notificationAccept()' on a null object reference
        at com.gae.scaffolder.plugin.MyFirebaseMessagingService.onMessageReceived(MyFirebaseMessagingService.java:42)
        at com.google.firebase.messaging.FirebaseMessagingService.zzc(com.google.firebase:firebase-messaging@@20.0.0:68)
        at com.google.firebase.messaging.zze.run(com.google.firebase:firebase-messaging@@20.0.0:2)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at com.google.android.gms.common.util.concurrent.zza.run(Unknown Source:6)
        at java.lang.Thread.run(Thread.java:764)

I don't fully understand the issue of starting the application.

[mozhn]

Well, I went a little further. It doesn't crash anymore but I can't show any call acceptance screens either.

MyFirebaseMessagingService.java

    public void onMessageReceived(RemoteMessage remoteMessage) {
        // TODO(developer): Handle FCM messages here.
        // If the application is in the foreground handle both data and notification messages here.
        // Also if you intend on generating your own notifications as a result of a received FCM
        // message, here is where that should be initiated. See sendNotification method below.
        Log.d(TAG, "==> MyFirebaseMessagingService onMessageReceived");

        String packageName = getApplicationContext().getPackageName();
        String className = MyFirebaseMessagingService.class.getName();
        ComponentName componentName = new ComponentName(packageName, className);

        TelecomManager telecomManager = (TelecomManager)this.getSystemService(Context.TELECOM_SERVICE);
        PhoneAccountHandle handle = new PhoneAccountHandle(componentName, "MyApp");
        PhoneAccount phoneAccount;

        if(android.os.Build.VERSION.SDK_INT >= 26) {
            phoneAccount = new PhoneAccount.Builder(handle, "MyApp")
                .setCapabilities(PhoneAccount.CAPABILITY_SELF_MANAGED)
                .build();
            telecomManager.registerPhoneAccount(phoneAccount);
        }

        if(android.os.Build.VERSION.SDK_INT >= 23) {
            phoneAccount = new PhoneAccount.Builder(handle, "MyApp")
                .setCapabilities(PhoneAccount.CAPABILITY_CALL_PROVIDER)
                .build();
            telecomManager.registerPhoneAccount(phoneAccount);
        }

        Bundle extras = new Bundle();
        extras.putParcelable(TelecomManager.EXTRA_PHONE_ACCOUNT_HANDLE, handle);
        extras.putInt(TelecomManager.EXTRA_START_CALL_WITH_VIDEO_STATE, VideoProfile.STATE_BIDIRECTIONAL);
        telecomManager.addNewIncomingCall(handle, extras);

        if(remoteMessage.getNotification() != null){
            Log.d(TAG, "\tNotification Title: " + remoteMessage.getNotification().getTitle());
            Log.d(TAG, "\tNotification Message: " + remoteMessage.getNotification().getBody());
        }
        
        Map<String, Object> data = new HashMap<String, Object>();
        data.put("wasTapped", false);
        
        if(remoteMessage.getNotification() != null){
            data.put("title", remoteMessage.getNotification().getTitle());
            data.put("body", remoteMessage.getNotification().getBody());
        }

        for (String key : remoteMessage.getData().keySet()) {
            Object value = remoteMessage.getData().get(key);
            Log.d(TAG, "\tKey: " + key + " Value: " + value);
            data.put(key, value);
        }
        
        Log.d(TAG, "\tNotification Data: " + data.toString());
        FCMPlugin.sendPushPayload(data);
    }

AndroidManifest.xml

<service android:name="com.gae.scaffolder.plugin.MyFirebaseMessagingService" android:permission="android.permission.BIND_TELECOM_CONNECTION_SERVICE" android:stopWithTask="false">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.telecom.ConnectionService" />
            </intent-filter>
        </service>

Edit:

Console output after sending the notification.

2020-11-12 19:37:17.695 1423-1446/? I/Telecom: PhoneAccountRegistrar: Modify account: [ComponentInfo{com.blabla.blabla/com.gae.scaffolder.plugin.MyFirebaseMessagingService}, ***, UserHandle{0}]: TSI.rPA@LV0
2020-11-12 19:37:17.704 1423-4211/? I/Telecom: : Adding new incoming call with phoneAccountHandle ComponentInfo{com.blabla.blabla/com.gae.scaffolder.plugin.MyFirebaseMessagingService}, ***, UserHandle{0}: TSI.aNIC@LV4
2020-11-12 19:37:17.710 1423-4211/? I/Telecom: PhoneAccountRegistrar: SimCallManager queried, returning: null: TSI.aNIC@LV4
2020-11-12 19:37:17.710 1423-4211/? I/Telecom: Call: CallerInfo lookup returned null, skipping update: TSI.aNIC@LV4
2020-11-12 19:37:17.711 1423-4211/? I/Telecom: LogUtils: EventRecord added as Call: [TC@42, NEW, null, null, A, childs(0), has_parent(false), [Capabilities:], [Properties:]]: TSI.aNIC@LV4
2020-11-12 19:37:17.712 1423-4211/? I/Telecom: Event: RecordEntry TC@42: CREATED, null: TSI.aNIC@LV4
2020-11-12 19:37:17.717 1423-4211/? I/Telecom: PhoneAccountRegistrar: SimCallManager queried, returning: null: TSI.aNIC@LV4
2020-11-12 19:37:17.717 1423-4211/? I/Telecom: CreateConnectionProcessor: Trying attempt CallAttemptRecord(ComponentInfo{com.blabla.blabla/com.gae.scaffolder.plugin.MyFirebaseMessagingService}, ***, UserHandle{0},ComponentInfo{com.blabla.blabla/com.gae.scaffolder.plugin.MyFirebaseMessagingService}, ***, UserHandle{0}): TSI.aNIC@LV4
2020-11-12 19:37:17.718 1423-4211/? I/Telecom: Event: RecordEntry TC@42: START_CONNECTION, null: TSI.aNIC@LV4

[mattkhaw]

I see that you are using OneSignal. You don't need to implement everything in native. Just use native code to force the app to open and handle it in Cordova. Pretty straightforward. The only downside is that you might need to adjust the styles so that it looks like it is opened transparently. Leverage the background notifications feature in OneSignal.

[mozhn]

I see that you are using OneSignal. You don't need to implement everything in native. Just use native code to force the app to open and handle it in Cordova. Pretty straightforward. The only downside is that you might need to adjust the styles so that it looks like it is opened transparently. Leverage the background notifications feature in OneSignal.

It is said that this is a bad experience. I still can't find how to do it.

[mozhn]

I managed to start the application. However, this does not seem like a nice method.

Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

[mattkhaw]

It is said that this is a bad experience. I still can't find how to do it.

Just a part of learning. You'll eventually find the solution. Imagine me going through this without any help or resource.

I managed to start the application. However, this does not seem like a nice method.

Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

This is a complete legit solution by the way. Just tweak your styles a bit to fit your current criteria.

[mozhn]

Thank you for your support. I just did not fully understand what you mean by this sentence.

Just tweak your styles a bit to fit your current criteria.

[mattkhaw]

Thank you for your support. I just did not fully understand what you mean by this sentence.

Just tweak your styles a bit to fit your current criteria.

What I meant by styles here is Android style. You can change the appearance of your app by changing various options given in Android.

Did you notice that on startup, every Android app will start with a black screen? In my case, I modified it so that it will startup in the background once the notification is received. Otherwise, it will be very weird to see a black screen first then the call UI if the app is started up from closed state.

[mozhn]

Got it, thank you again for everything. I am closing the subject because I solved my problem. I'll prepare a small document for android if I have time.

[mattkhaw]

Got it, thank you again for everything. I am closing the subject because I solved my problem. I'll prepare a small document for android if I have time.

Glad it worked out for you.