Detect back button but don't dismiss dialogfragment

Question

I have a dialogfragment for a floating dialog which includes a special keyboard that pops up when a user presses inside an EditText field (the normal IME is stopped from bei

Answer 1

How has no one suggested this?

public Dialog onCreateDialog(Bundle savedInstanceState) {
  Dialog dialog = super.onCreateDialog(savedInstanceState);

  // Add back button listener
  dialog.setOnKeyListener(new Dialog.OnKeyListener() {
    @Override
    public boolean onKey(DialogInterface dialogInterface, int keyCode, KeyEvent keyEvent) {
      // getAction to make sure this doesn't double fire
      if (keyCode == KeyEvent.KEYCODE_BACK && keyEvent.getAction() == KeyEvent.ACTION_UP) {
        // Your code here
        return true; // Capture onKey
      }
      return false; // Don't capture
    }
  });

  return dialog;
}

Answer 2

Prevent canceling DialogFragment:

dialog.setCanceledOnTouchOutside(false)
dialog.setCancelable(false)
dialog.setOnKeyListener { dialog, keyCode, event ->
    keyCode == KeyEvent.KEYCODE_BACK && event.action == KeyEvent.ACTION_UP
}

Answer 3

When creating the dialog, override both onBackPressed and onTouchEvent :

        final Dialog dialog = new Dialog(activity) {
            @Override
            public boolean onTouchEvent(final MotionEvent event) {
                //note: all touch events that occur here are outside the dialog, yet their type is just touching-down
                boolean shouldAvoidDismissing = ... ;
                if (shouldAvoidDismissing) 
                    return true;
                return super.onTouchEvent(event);
            }

            @Override
            public void onBackPressed() {
                boolean shouldAvoidDismissing = ... ;
                if (!shouldSwitchToInviteMode)
                    dismiss();
                else
                    ...
            }
        };

Answer 4

Use onDismiss() callback of DialogFragment with a closeActivity flag

private var closeActivity: Boolean = true    

override fun onDismiss(dialog: DialogInterface?) {
        super.onDismiss(dialog)

        if (closeActivity) {
            activity!!.finish()
        }
    }

Answer 5

Use Fragment onCancel override method. It's called when you press back. here is a sample:

@Override
public void onCancel(DialogInterface dialog) {
    super.onCancel(dialog);

    // Add you codition
}

Answer 6

The best way and cleanest way is to override onBackPressed() in the dialog you created in onCreateDialog().

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    return new Dialog(getActivity(), getTheme()){
        @Override
        public void onBackPressed() {
            //do your stuff
        }
    };
}