Go back to previous screen without creating new instance

Question

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As explained in image, flow is something like this. So whenever user click on logo button Activity A should be called. As simple solution we can use this method...

Intent intent = new Intent(activity, activityToStart);
startActivity(intent);

But this activity will create a new activity for my app. but I need to call the same instance of the activity as we move forward in flow diagram. from Activity A to B and then again on B can be called easily by callingfinish() but from Activity C or D, how to come back to A.

I am running out of ideas but not getting any fruitful result. Please help me if you have any suggestion or at any place i am going wrong. Thanks in advance.

Have a look at [FLAG_ACTIVITY_CLEAR_TOP](http://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_CLEAR_TOP) — Praveenkumar, Jul 30 '12 at 05:39

score 19 · Accepted Answer · answered Jul 30 '12 at 05:34

To Come Back from D to A, use Intent Flags.

Intent intent = new Intent(activity, activityToStart);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
startActivity(intent);

FLAG_ACTIVITY_CLEAR_TOP, will instead of creating new activity, it will invoke the activity on the stack, and will pop all the activities over the activity being invoked.

score 1 · Answer 2 · answered Jul 30 '12 at 05:37

Instead of Using

Intent intent = new Intent(activity, activityToStart);
startActivity(intent);

Use

Intent intent = new Intent(activity, activityToStart);
startActivityforResult(intent,1234);

This will make Sure that The Activity A is not Killed and when You finish Your Activity C,Activity A will get Resumed.

Note :- Whenever You create A new Activity,without finishing(Exiting) the Host Activity,The Host Activity is Saved On the Stack in LIFO order

LIFO:- Last In First Out

Thanks for the explanation. I will definitely try your solution. — Android, Jul 30 '12 at 06:16

score 0 · Answer 3 · edited May 23 '17 at 11:45

0

By making Activity A a "SingleTask" you can achive this. When a Activity is in the SingleTask on clicking the Home button the other activites will be removed from the stack.

Refer these link's for more info on Android Activites...

Link 1 - Android Fundamentals

Link 2 - Another Similar Question

edited May 23 '17 at 11:45

Community

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answered Jul 30 '12 at 05:37

Errol Dsilva

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Don;t you think this way I won't be able to achieve back button functionality. Thanks any ways. – Android Jul 30 '12 at 06:17

score 0 · Answer 4 · answered Jul 30 '12 at 05:37

0

Use ViewFlipper to go and back between different window in the same activity.

ViewFlipper vf = (ViewFlipper) findViewById( R.id.view_flipper);

To go to the next window

vf.showNext();

To go to the previous window

vf.showPrevious();

answered Jul 30 '12 at 05:37

Imdad Sarkar

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score 0 · Answer 5 · answered Jul 30 '12 at 05:38

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I am not sure,this is right way or not,but you can give it a try!

You can finish() current activity when you open the new one starting from Activity-B.

i.e.

To open Activity-C => finish Activity-B and start Activity-C

To open Activity-D => finish Activity-C and start Activity-D

now when you will press back,Activity-A will open.

answered Jul 30 '12 at 05:38

Hiral Vadodaria

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Thanks. I will try as per your suggestion – Android Jul 30 '12 at 06:15

Go back to previous screen without creating new instance

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