Unable to create back stack for activities

Question

I am receiving a notification and i want to create a custom back stack so the user can navigate through it.But as of now clicking on the notification opens the desired activity but when i press the back button it completely exits the app.

Intent resultIntent = new Intent(this, NotifViewActivity.class);
    resultIntent.putExtra(StringHolder.NOTIFICATION_ID, notif.getId());

    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
    stackBuilder.addParentStack(HomeActivity.class);
    stackBuilder.addParentStack(NotifActivity.class);
    stackBuilder.addNextIntent(resultIntent);
    PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder notificationCompat = new NotificationCompat.Builder(context)
            .setAutoCancel(true)
            .setContentTitle(notif.getTitle())
            .setSmallIcon(R.drawable.ic_launcher)
            .setContentIntent(resultPendingIntent);

Manifest File

<activity
        android:name=".NotifActivity"
        android:parentActivityName=".HomeActivity">
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".HomeActivity" />
    </activity>
    <activity
        android:name=".NotifViewActivity"
        android:parentActivityName=".NotifActivity">
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".NotifActivity" />
    </activity>

The way i want it to work is,on click of the notification the user is taken to NotifViewActivity then when back button is pressed the user is taken to NotifActivity and when back button is pressed again the user is taken to HomeActivity .Thats the hierarchy i am trying to create,how can i do that?

Divers · Accepted Answer · 2017-04-09T10:04:37.903

You should build your task stack that way:

    stackBuilder.addParentStack(HomeActivity.class);
    stackBuilder.addParentStack(NotifActivity.class);
    stackBuilder.addNextIntentWithParentStack(resultIntent);

Or actually because you already specifying activity hierarchy in manifest, you can do it with just one line:

   stackBuilder.addNextIntentWithParentStack(resultIntent);

Or another way to archive the same without specifying hierarchy in manifest:

    Intent mainActivityIntent = new Intent(this, HomeActivity.class);
    Intent notifActivityIntent = new Intent(this, NotifActivity.class);
    stackBuilder.addNextIntent(mainActivityIntent);
    stackBuilder.addNextIntent(notifActivityIntent);
    stackBuilder.addNextIntent(resultIntent);

Strangely mine was exactly like this but wasn't working until I uninstalled the app and reinstalled it!! (on emulator) — Bakhshi, Jul 06 '17 at 06:21

score 0 · Answer 2 · answered May 23 '19 at 08:07

0

For anyone who is trying to start those the created activity with TaskStackBuilder, follow @Divers solution and then use taskStackBuilder.startActivities().

answered May 23 '19 at 08:07

Samir

3,139
2
17
24

where do you put taskStackBuilder.startActivities();? – CanCoder Jul 04 '20 at 14:18

score -2 · Answer 3 · answered Apr 09 '17 at 10:01

-2

try this : put below code into NotifViewActivity

 @Override
        public void onBackPressed() {
            Intent i = new Intent(this, HomeActivity.class);
        i.putExtra("exit", true);
        i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(i);
        super.onBackPressed();
        }

answered Apr 09 '17 at 10:01

Santosh Bachkar

460
4
14

What is the sense in `i.putExtra("exit", true);` and `i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);` ? – Divers Apr 09 '17 at 10:02
https://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_CLEAR_TOP – Santosh Bachkar Apr 09 '17 at 10:06
And? How it's applied to current authors question? How it will add to back stack `HomeAcitivty`? How it actually will work only for cases when acitivity opened by clicking on notification? How adding `exit - true` in extras can help? – Divers Apr 09 '17 at 10:07
i.putExtra("exit", true); ,its optional – Santosh Bachkar Apr 09 '17 at 10:11
have you try this. – Santosh Bachkar Apr 09 '17 at 10:25
@SantoshBachkar this would always work and i was aware of this solution but its more of a work around considering there is a standard solution available. – Jude Fernandes Apr 09 '17 at 10:45

Unable to create back stack for activities

3 Answers3