Button to go back to MainActivity

Question

I want to create a button that would lead the user straight back to main activity which doesn't have the android name="com.example.example".
It has android.intent.etc...
How can I reference my button to go back to this activity?

what is the full name of the Activity you are trying to start ? — confucius, Jul 12 '12 at 21:28
@Moussa The accepted answer is wrong since it will add a new instance of Home activity to the stack, it's like create your activity again and again!! — K_Anas, Jul 12 '12 at 21:54

score 45 · Accepted Answer · edited Jun 23 '13 at 08:53

45

Lets say your main activity is called Main.java.

btnBack.setOnClickListener(new OnClickListener(){

  private void onClick(){
    Intent intent = new Intent(currentActivity.this, Main.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);   
    startActivity(intent);
  }
});

edited Jun 23 '13 at 08:53

Peter Lozovitskiy

239
3
10

answered Jul 12 '12 at 21:32

zzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

5,711
8
54
70

This will add a new instance of Home activity to the stack, not take the user back to the Home activity. – E-Riz Jul 12 '12 at 21:48
You are adding new instance to the stack!! – K_Anas Jul 12 '12 at 21:54
2

I added the flag so it doesn't add a new instance to the stack. – zzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Jul 13 '12 at 17:13

score 15 · Answer 2 · answered Jul 12 '12 at 21:31

15

use startActivity(intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));

answered Jul 12 '12 at 21:31

K_Anas

31,226
9
68
81

1

+1: This is the correct response. Adding flags like NEW_TASK will only create unexpected behavior for the user, and simply starting a new activity will add a second (new) instance to the stack. – devunwired Jul 12 '12 at 21:34
1

@Moussa Intent a = new Intent(this,Home.class); a.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(a); – K_Anas Jul 12 '12 at 21:50

Adam Stelmaszczyk · Answer 3 · 2014-07-04T08:49:52.650

10

Sometimes you can just call activity.finish() to end current activity, so the main (first created) activity will pop out.

If this is not your case, do this:

Intent intent = new Intent(getApplicationContext(), Main.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)             
startActivity(intent);

edited Jul 04 '14 at 08:49

answered Jul 12 '12 at 21:32

Adam Stelmaszczyk

19,665
4
70
110

confucius · Answer 4 · 2012-07-12T21:47:06.547

5

Intent intent = new Intent(this, Main.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);

edited Jul 12 '12 at 21:47

answered Jul 12 '12 at 21:30

confucius

13,127
10
47
66

This is my setup: public void onClick(View v) { // Perform action on click Intent intent = new Intent(this, Main.class); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); This is the error: The constructor Intent(new View.OnClickListener(){}, Class
) is undefined'.
– Moussa Jul 12 '12 at 21:41
what is the name of the class that contains the onClick method – confucius Jul 12 '12 at 21:46
Thanks for your help very much but zzzzzzzzzz answer helped me – Moussa Jul 12 '12 at 21:47

score 0 · Answer 5 · answered Jul 12 '12 at 21:29

0

Well from wherever you are just call startActivity() with the required parameters inside the buttons onClick method. That's it.

answered Jul 12 '12 at 21:29

Code Droid

10,344
17
72
112

score 0 · Answer 6 · answered Jun 06 '17 at 18:28

0

public void onBackPressed(){
    finish();
}

answered Jun 06 '17 at 18:28

Jupiter

615
1
6
15

This does not provide an answer to the question. Once you have sufficient [reputation](https://stackoverflow.com/help/whats-reputation) you will be able to [comment on any post](https://stackoverflow.com/help/privileges/comment); instead, [provide answers that don't require clarification from the asker](https://meta.stackexchange.com/questions/214173/why-do-i-need-50-reputation-to-comment-what-can-i-do-instead). - [From Review](/review/low-quality-posts/16343576) – Zoe Jun 07 '17 at 11:28
@LunarWatcher I respectfully disagree - this _is_ an _attempt_ to answer... An attempt that is perhaps faulty and happens to work in very specific cases - but a solution being bad is not reason enough for deletion. – Dev-iL Jun 07 '17 at 14:53
It is 5 years too late and wrong, but the key here is that it requires clarification if someone is new to ANdroid for an instance. What is this, where is it placed, etc – Zoe Jun 07 '17 at 15:18
Its a nice hack – Goodlife Nov 27 '17 at 16:17

Button to go back to MainActivity

6 Answers6

Linked