AlertDialog.java

private void showAlertDialog() {
        
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    // Get the layout inflater
    LayoutInflater inflater = getLayoutInflater();
    View view = inflater.inflate(R.layout.alert_dialog, null);

    // Inflate and set the layout for the dialog
    // Pass null as the parent view because its going in the dialog layout
    builder.setView(view);

    final AlertDialog dialog = builder.create();
    dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);

    ImageView imageButton = view.findViewById(R.id.imageButton);
    imageButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            dialog.dismiss();
        }
    });
    dialog.show();
}