Overriding default back button behavior in android

Question

I just recently learned how to clear the backstack in Android. I have two activities, one for login (LoginActivity) and one to use the application (MainActivity). It consists of a bunch of fragments. This is the code I used to start the MainActivity

Intent intent = new Intent(LoginActivity.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish(); // call this to finish the current activity

Everything works fine, when I'm on the MainActivity and I press the home button, the application closes. When I open it back up, it opens the MainActivity. But when I press the back button, it's closing the application and when I open it back up, the LoginActivity is opening. How do I override the back button so it behaves the same as the home button.

you can just put @Override public void onBackPressed() { moveTaskToBack(true); } in side your main activty — saeed, Apr 15 '16 at 03:48

score 9 · Accepted Answer · answered Apr 15 '16 at 03:53

Sounds like you want to override the back button behavior to move the app to the background instead of doing the usual back button behavior.

You can do this by overriding onBackPressed:

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

score 1 · Answer 2 · answered Apr 15 '16 at 03:47

1

You can use activity's method.

from activity,

onBackPress()

from fragment,

getActivity().onBackPress()

answered Apr 15 '16 at 03:47

ErShani

392
2
9

score 0 · Answer 3 · edited May 23 '17 at 12:25

You can start Luncher Application in your MainActivity's onBackPressed(),it seems you press the home button.

According to :Going to home screen programmatically

 @Override
public void onBackPressed() {
    Intent startMain = new Intent(Intent.ACTION_MAIN);
    startMain.addCategory(Intent.CATEGORY_HOME);
    startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(startMain);
}

Overriding default back button behavior in android

3 Answers3

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