gistfile1.txt

public abstract class NucleusActionBarActivity<PresenterType extends Presenter> extends ActionBarActivity {
    private static final String PRESENTER_STATE_KEY = "presenter_state";
    private PresenterType presenter;

    public NucleusActionBarActivity() {
    }

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.requestPresenter(savedInstanceState == null ? null : savedInstanceState.getBundle("presenter_state"));
    }

    protected void onDestroy() {
        if (this.isFinishing()) {
            this.destroyPresenter();
        }

        super.onDestroy();
    }

    protected void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putBundle("presenter_state", this.savePresenter());
    }

    protected void onResume() {
        super.onResume();
        this.takeView();
    }

    protected void onPause() {
        super.onPause();
        this.dropView(this);
    }

    public PresenterType getPresenter() {
        return this.presenter;
    }

    public void destroyPresenter() {
        if (this.presenter != null) {
            PresenterManager.getInstance().destroy(this.presenter);
            this.presenter = null;
        }

    }

    private void requestPresenter(Bundle presenterState) {
        if (this.presenter == null) {
            this.presenter = PresenterManager.getInstance().provide(this, presenterState);
        }

    }

    private Bundle savePresenter() {
        return PresenterManager.getInstance().save(this.presenter);
    }

    private void takeView() {
        this.requestPresenter((Bundle) null);
        this.presenter.takeView(this);
    }

    private void dropView(Activity activity) {
        this.presenter.dropView();
        if (activity.isFinishing()) {
            this.destroyPresenter();
        }

    }
}