Start a new activity, but old one continues?

Question

From my activity, I start a new Activity by defining an Intent for it. Then I start the new Activity.

Now suppose in method A this happens :

A {
    /*
     *
     *
     */
    startActivity(i);  // where i is the intent for new Acivity
    /*
     *
     *
     */
}

Now what happens is that statements after start activity are executed even before i starts. I want when I start 'i', the current class pauses the 'i' starts , and afte 'i' finishes, this class resumes from that point ?

Is it possible to do this ?

You wan to kill the current activtity before starting the new one? — amalBit, Mar 22 '14 at 06:59
I am passing data from A to i, want to do the processing in i and then show the result back in A...... — user3448960, Apr 03 '14 at 16:00

Pratik Dasa · Answer 1 · 2014-03-22T07:10:27.010

0

Write finish(); after startActivity(i); Or call onDestroy() method.

edited Mar 22 '14 at 07:10

answered Mar 22 '14 at 07:01

Pratik Dasa

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hmmm... why to write `finish()` in `onDestroy()`? – Gopal Gopi Mar 22 '14 at 07:04
to kill all the instances of current activity. – Pratik Dasa Mar 22 '14 at 07:05
when `onDestroy()` is called, means `Activity` is in finishing state. why to call `finish()` again? – Gopal Gopi Mar 22 '14 at 07:07
ya its fine, if you cant write finish there. It was my mistake. Sorry. – Pratik Dasa Mar 22 '14 at 07:10
you can call dear, why you not call manually, you can and you can perform any actions on it. Its your misunderstanding. I was saying that once you implement onDestroy() then no need to call finish() method. – Pratik Dasa Mar 22 '14 at 07:16
Nope. you can not call `Activity` life cycle methods manually even though they are simply plain methods... – Gopal Gopi Mar 22 '14 at 07:18

score 0 · Accepted Answer · edited May 23 '17 at 12:11

You could call finish() right after your startActivity() call, but that would terminate the first activity. The alternative is to start the new activity with startActivityForResult() and put logic in the first activity to stop doing what it's doing until it gets the results. The results will come as a firing of callback onActivityResult().

This question has a good write-up of an example.

score 0 · Answer 3 · edited May 23 '17 at 12:20

The activities live in UI Threat and is impossible stop this threat because Android Kernel protect this.

When you start a new activity with startActivity(i) the old activity appears again if you clic in back button or if you invoque onBackPressed(). And you can overwrite this method to close the actual activity after launch the new, like this :

@Override
public void onBackPressed() {
    Intent i = new Intent(this, ACTIVITYNAME.class );
    startActivity(i);
    this.finish();
}

After you need recall the first activity if you need resume...

And finally, perhaps the best option, you can use startActivityForResult(), here a good example :

How to manage `startActivityForResult` on Android?

Start a new activity, but old one continues?

3 Answers3