Do not kill the activity on back key pressed

Question

I have two Activity A and B.

I do not want to destroy the Activity B, maintain in stack to reuse the same activity when i navigate from A to B again.

Actual: Activity B is loading URL in webview oncreate which creating every time and reloads the URL.

Expected: It should start Activity A to Activity B by not creating and should not reload again.

So you want to "hide" the activity, instead of destroying it. Check this out - [onbackpressed to hide not destroy activity](https://stackoverflow.com/questions/5914040/onbackpressed-to-hide-not-destroy-activity) — Nero, Jan 02 '19 at 11:25
Possible duplicate of [Sending Activity to background without finishing](https://stackoverflow.com/questions/2041891/sending-activity-to-background-without-finishing) — Manohar, Jan 02 '19 at 11:27
when i use moveTaskToBack(true); it is taking Activity B to background. It doesn't help me. It should go to Activity A. When again i navigate to B, it should not recreate. — Rajesh Gaddam, Jan 02 '19 at 11:29

score 0 · Answer 1 · edited Jan 02 '19 at 11:44

0

@Override
public void onBackPressed() {
  moveTaskToBack(true);
}

It'll move your activity to Stack and it'll remain there when you'll return. For more details look here

edited Jan 02 '19 at 11:44

VVN

answered Jan 02 '19 at 11:32

I don't want to hide the activity. It should navigate to Activity A without destroying Activity B to reuse it. – Rajesh Gaddam Jan 02 '19 at 11:35

score 0 · Answer 2 · answered Jan 02 '19 at 11:39

0

Try this solution

@Override
public void onBackPressed() {
this.startActivity(new Intent(YourActivity.this,ActivityA.class));  
}

Override the onBackPressed() in ActivityB and then launch the activity A

answered Jan 02 '19 at 11:39

Quick learner

In this scenario navigating to Activity A, but URL is reloading in webview when i navigate again to Activity B. – Rajesh Gaddam Jan 02 '19 at 11:44

score 0 · Answer 3 · answered Jan 03 '19 at 05:45

From Activity B, below code will not destroy the Activity B and navigate to A

@Override
public void onBackPressed() {
this.startActivity(new Intent(ActivityB.this,ActivityA.class));  
}

Navigating from Activity A to B, set below flag to intent which will not recreate the activity.

setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT)

Thanks.

3 Answers3