Use Intents to move between activities

        Intent intent = new Intent(getActivity(), LoginActivity.class);
        startActivityForResult(intent, Contants.REQUEST_CODE);

People with development experience use startActivityForResult(intent, Contants.REQUEST_CODE);

instead of startActivity(intent);

The value of Contents.REQUEST_CODE is set to be greater than or equal to 0, and the default is set to 0 first;