Android: how to quit an activity without closing it when click on back button?

Question

I have a subActivity that can be open from my mainActivity.

For some reasons, when the user clicks on the back button go back to my mainActivity, I want my subActivity to remain open in background in order to be able to come back for later.

Questions:

how to avoid to close the subActivity when the user clicks back ?
how to come back to the mainActivity without restarting it ?
how to come back later to my opened activity without re-creating it completely ? (just want to bring it to front)

Thanks !

Don't finish your activity just change. – Farhana Naaz Ansari Nov 22 '18 at 10:55 — Farhana Naaz Ansari, Nov 22 '18 at 10:55

score 2 · Accepted Answer · edited Nov 22 '18 at 11:11

2

On you subActivity onBackPressed() add this

@Override
public void onBackPressed() {
     Intent i = new Intent(SubActivity.this, MainActivity.class);
    i.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);

    startActivity(i);
}

on mainActivity :

  private void openSubActivity() {        

        Intent intent = new Intent(MainActivity.this,SubActivity.class);
       intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
        startActivity(intent);

    }

edited Nov 22 '18 at 11:11

toto_tata

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answered Nov 22 '18 at 10:59

Ali Ahmed

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Thanks but how to come back to the mainActivity without restarting it ? – toto_tata Nov 22 '18 at 11:03
1

Ok, probably found the answer https://stackoverflow.com/questions/8688099/android-switch-to-activity-without-restarting-it for this last point – toto_tata Nov 22 '18 at 11:04
1

I modified your answer with the solution ! Thanks a lot. – toto_tata Nov 22 '18 at 11:12

score 0 · Answer 2 · edited Nov 22 '18 at 10:59

0

override onBackPressed() and remove super from it then try opening the activity which you want to open from there for ex-

  @Override
    public void onBackPressed() {
 // your code
    }

and with the help of different activity launch modes you can achieve it

edited Nov 22 '18 at 10:59

ʍѳђઽ૯ท

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answered Nov 22 '18 at 10:58

Rohit Sharma

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Android: how to quit an activity without closing it when click on back button?

2 Answers2