Navigate to menu on back button press

Question

I'm navigating from:

Main activity to Activity 2
Activity 2 to Activity 3
Activity 3 to Activity 4

through Intent.

I've also created the menu so that user can directly navigate from Activity 4 to Main activity.
But after navigating from Activity 4 to Main activity by using menu, when I press back, it takes me to Activity 3 rather than exiting the application.

I tried:

@Override
public void onBackPressed() {
    super.onBackPressed();
    MainActivity.this.finish();
}

But no gain. Any suggestions?

I think that was answered [here][1] [1]: http://stackoverflow.com/questions/4732184/how-to-finish-an-android-application?rq=1 — Luis Neves, Jun 20 '12 at 09:25
in `manifest.xml` in above link, why it is `` instead of `` ? — GAMA, Jun 20 '12 at 09:29

score 6 · Accepted Answer · edited Jun 20 '12 at 09:24

6

Just try this code when you navigate from 4th Activity to Main Activity.

Intent inMain=new Intent(Activity4.this, MainActivity.class);
inMain.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(inMain);

Note:

This code in your case, clears the previous activities and launches the main activity with no activity in the backstack.

edited Jun 20 '12 at 09:24

Pattabi Raman

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answered Jun 20 '12 at 09:09

Deepika

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score 3 · Answer 2 · answered Jun 20 '12 at 09:09

3

You can set flag Intent.FLAG_ACTIVITY_CLEAR_TOP to finish all the intermediate activities and your called activity will come to top of the activity stack.

answered Jun 20 '12 at 09:09

Mohammed Azharuddin Shaikh

41,633
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score 2 · Answer 3 · edited Jun 20 '12 at 09:22

2

use the flag Intent.FLAG_ACTIVITY_CLEAR_TOP with your intent. For more detail -

FLAG_ACTIVITY_CLEAR_TOP

edited Jun 20 '12 at 09:22

Praveenkumar

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answered Jun 20 '12 at 09:07

Dheeresh Singh

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score 1 · Answer 4 · answered Jun 20 '12 at 09:09

1

call startActivity Method using clear top flag

   startActivity(new Intent(this, UI.class)
  .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK));

answered Jun 20 '12 at 09:09

Antony

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score 1 · Answer 5 · answered Jun 20 '12 at 09:12

You need to consider your "back stack" more closely.

What is happening exactly is, your back stack gets populated as follows:

Main activity -> Activity 2 -> Activity 3 -> Activity 4

Then from Activity 4 you launch your Main Activity. So your stack becomes:

Main activity -> Activity 2 -> Activity 3 -> Main Activity

Hence, when you press back, you land up in Activity 3.

Solution:

Either call finish() on every Activity when you navigate away from them. Or use Intent.FLAG_ACTIVITY_CLEAR_TOP to clear all intermediate Activities.

More about Intent.FLAG_ACTIVITY_CLEAR_TOP.

score 1 · Answer 6 · answered Jun 20 '12 at 09:14

When you go back to the MainActivity you need to use the Intent.FLAG_ACTIVITY_CLEAR_TOP on your Intent. This is an example of a goHome method that you can used in your Activity:

public void goHome ()
{
    Intent homeIntent = new Intent();
    homeIntent.setClass(this, MainActivity.class);
    homeIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(homeIntent);
}

score 0 · Answer 7 · answered Jun 20 '12 at 09:10

0

In activity 2 and 3, after calling startActivity(intent), call this.finish(). This will also be one solution.

answered Jun 20 '12 at 09:10

Guanlun

1,598
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no, it'll not work in my case as if I want to get back to 2 from 3, I can't navigate – GAMA Jun 20 '12 at 09:15

score 0 · Answer 8 · answered Jun 20 '12 at 09:13

0

Finish previous activity when you are go to the next activity means write finish(); after startactivity(intent); and write below code for start first activity from fourth activity's button click event.

Intent in1=new Intent(Act4.this, Act1.class);
startActivity(in1);
finish();

answered Jun 20 '12 at 09:13

no, it'll not work in my case as if I want to get back to 2 from 3, I can't navigate – GAMA Jun 20 '12 at 09:15
@GAMA you can navigate to activity3 to activity2 using intent. – Jun 20 '12 at 09:19
no, not using intent. i'm talking about going to act 3 from act 2 by using back button. – GAMA Jun 20 '12 at 09:24
@GAMA Using this code you are going to act3 to act2, Intent in1=new Intent(Act3.this, Act2.class); startActivity(in1); finish(); – Jun 20 '12 at 09:27
NO, i'm not navigating from 3 to 2 by code. That should be taken care by back button and hence I'm not using `finish()` – GAMA Jun 20 '12 at 09:31

Navigate to menu on back button press

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