CODEWITHSUNDEEP
android
Android
Android

Reputation: 3868

Go back to previous screen without creating new instance

enter image description here

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.

Upvotes: 9

Views: 13092

Answers (5)

Hiral Vadodaria
Hiral Vadodaria

Reputation: 19250

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.

Upvotes: 0

Haresh Chaudhary
Haresh Chaudhary

Reputation: 4400

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

Upvotes: 1

Imdad Sarkar
Imdad Sarkar

Reputation: 1235

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();

Upvotes: 0

Errol Dsilva
Errol Dsilva

Reputation: 177

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

Upvotes: 0

jeet
jeet

Reputation: 29199

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.

Upvotes: 19

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