How to get back to the previously opened activity without data lost

Question

I have open activities like this

Activity-A(Get the User Personal Details) -->

Activity-B(Getting the User Contact Info) -->

Activity-C(Getting the User Credit Card Details) -->

Activity-D(Credit Card Verification)

Now from the Activity-D, I need to move to the Activity-B wihtout loosing user entered data on the Activity-B

I have tried finish() menthod on Activity-D But It fails.

I have open every activity using the following method. Example from Activtiy-A to Activty-B

 Intent intent_B = new Intent(getApplicationContext(), ActivityB.class)
startActivity(intent_B);

How to I resume the Activity-B from Activity-D

use saveInstanceState to handle these events.. Read documentation here.. https://developer.android.com/training/basics/activity-lifecycle/recreating.html — Queendevelopers, Nov 29 '16 at 16:14
@M.S.P how do i call activtiy B from activity D. It creates as new Activity without any data I have entered — nifCody, Nov 29 '16 at 16:16
Pass your data using the key value pair or Buffer. But even I would suggest you to go with saveinstancestate — Panda, Nov 29 '16 at 16:17

score 1 · Answer 1 · edited May 23 '17 at 12:08

Store/Restore whole required data of activity B to savedInstanceState.
Start activity B from activity D with Intent.FLAG_ACTIVITY_CLEAR_TOP

This lead to behavior you exactly need:

activity C & D is cleared from backstack
previously created activity B is opened
User can return from activity D to activity C by clicking back button
Also we prevent data from loosing in case removing invisible activities from memory by system

score 1 · Accepted Answer · answered Nov 30 '16 at 07:00

1

Simple solutions for your problem.

you Should call finish() before navigate to Activity D.

Intent intent_D = new Intent(getApplicationContext(), ActivityD.class)
startActivity(intent_D);
finish();

this will finish Activity C and Activity A and B are still in background. so when you Click Backpress or call finish() on Activity D, you will be navigate on Activity B and your data will be available without any extra effort.

answered Nov 30 '16 at 07:00

Nishchal Sharma

1,070
9
16

Welcome!! @nifcody – Nishchal Sharma Dec 05 '16 at 11:29

score 0 · Answer 3 · answered Nov 29 '16 at 16:24

0

Best way to do this would be to use Either static variables or Singleton class. Please find singleton explained here: link

As for static variables, please look here: link

answered Nov 29 '16 at 16:24

Vulovic Vukasin

1,540
2
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score -1 · Answer 4 · answered Nov 29 '16 at 16:22

Here's

IN Activity 1 ::

int REQ_INT=888;
Intent intent_B = new Intent(getApplicationContext(), ActivityB.class)
startActivityForResult(intent_B,REQ_INT);
 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK)
            switch (requestCode) {
                case REQ_INT: 
                 //DO your stuff here after getting in this activity again..
                 break;
            }
    }

In Activity 2::

After finishing the task for that activity .

Just

setResult(RESULT_OK);
finish();

you can pass the data to that activity with intent..

Or go see these link Link1 Link 2

and where is here an answer on particular question? – Beloo Nov 29 '16 at 16:34 — Beloo, Nov 29 '16 at 16:34

How to get back to the previously opened activity without data lost

4 Answers4