UserDetailsActivity.java

//UserDetailsActivity
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_user_details);
    tvUser = (TextView) findViewById(R.id.tvUser);
    tvUserUrl = (TextView) findViewById(R.id.tvUserUrl);

    //This check has to be called. Otherwise, when user is not logged in, presenter won't be injected and this line will cause NPE
    if (isUserSessionStarted()) {
        presenter.onCreate();
    }
}