Snippet.java

mOpenDialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG, "onClick: opening dialog");

                MyCustomDialog dialog = new MyCustomDialog();
                dialog.setTargetFragment(MainFragment.this, 1);
                dialog.show(getFragmentManager(), "MyCustomDialog");
            }
        });