BottomSheetDialogFragment - listen to dismissed by user event
If you extended from BottomSheetDialogFragment() just override in your class
override fun onDismiss(dialog: DialogInterface) {
super.onDismiss(dialog)
//Code here
}
This will trigger when onBackPress and when you dismiss the dialog by clicking outside of it.
Make sure to NOT set your dialog as cancelable because this will not fire
Although all similar questions on SO suggest using onDismiss
I think following is the correct solution:
@Override
public void onCancel(DialogInterface dialog)
{
super.onCancel(dialog);
Toast.makeText(MainApp.get(), "CANCEL", Toast.LENGTH_SHORT).show();
}
This fires if:
* the user presses back
* the user presses outside of the dialog
This fires NOT:
* on screen rotation and activity recreation
Solution
Combine onCancel and BottomSheetBehavior.BottomSheetCallback.onStateChanged like following:
public class Dailog extends BottomSheetDialogFragment
{
@Override
public void onCancel(DialogInterface dialog)
{
super.onCancel(dialog);
handleUserExit();
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
Dialog d = super.onCreateDialog(savedInstanceState);
d.setOnShowListener(new DialogInterface.OnShowListener() {
@Override
public void onShow(DialogInterface dialog) {
BottomSheetDialog d = (BottomSheetDialog) dialog;
FrameLayout bottomSheet = (FrameLayout) d.findViewById(android.support.design.R.id.design_bottom_sheet);
BottomSheetBehavior behaviour = BottomSheetBehavior.from(bottomSheet);
behaviour.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
@Override
public void onStateChanged(@NonNull View bottomSheet, int newState) {
if (newState == BottomSheetBehavior.STATE_HIDDEN)
{
handleUserExit();
dismiss();
}
}
@Override
public void onSlide(@NonNull View bottomSheet, float slideOffset) {
}
});
}
});
return d;
}
private void handleUserExit()
{
Toast.makeText(MainApp.get(), "TODO - SAVE data or similar", Toast.LENGTH_SHORT).show();
}
}