From the fragment now
Opening another fragment with addToBackStack(null);
Pressing the back button in this state returns you to the original fragment
What I want to do is addToBackStack(null); When I open another fragment, if I press the back button, the opened fragment closes
Return to main fragment
If I press the back button on the main fragment, I want to do something else (For example, float a dialog.)
What should I do to do this?
Thank you^
^ android fragment
If you don't have to stack the back key when you return to the Main Fragment, you can override onBackPressed() in Activity to handle the desired action.
override fun onBackPressed() {
super.onBackPressed()
//do something
}
First, create OnBackPressedListener interface.
public interface OnBackPressedListener {
void onBackPressed();
}
And interface for each Fragment do implementations. For example, below.
public class SettingFragment extends Fragment
implements OnBackPressedListner {
@Override
void onBackPressed() {
// // doIt your code
}
}
And if you override the onBackPressed() of the parent Activity as follows,
@Override
public void onBackPressed() {
List<Fragment> fragmentList = getSupportFragmentManager().getFragments();
if (fragmentList != null) {
//TODO: Perform your logic to pass back press here
for(Fragment fragment : fragmentList){
if(fragment instanceof OnBackPressedListener){
((OnBackPressedListener)fragment).onBackPressed();
}
}
}
}
For each Fragment, the desired BackButton action is possible.
© 2024 OneMinuteCode. All rights reserved.