MainActivity.java

public class MainActivity extends FragmentActivity{
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setUpView();
        setUpFragment();
    }
    void setUpView(){
         setContentView(R.layout.activity_main);
    }
    void setUpFragment(){
         FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
         SlidingFragment fragment = new SlidingFragment();
         transaction.replace(R.id.sample_content_fragment, fragment);
         transaction.commit();
    }
}