抽象活动(Wire Presenter实例,带View)

public abstract class MvpActivity<Presenter extends MvpPresenter>
        extends ActionBarActivity {
 
  protected Presenter mPresenter;
 
  @Override protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mPresenter = getPresenterInstance();
  }
 
  @Override protected void onResume() {
    super.onResume();
    mPresenter.onResume(this);
  }
 
  @Override protected void onPause() {
    mPresenter.onPause();
    super.onPause();
  }
}

视图界面

public interface MyView {
  void redirect();
}

视图实现

public class MyActivity
        extends MvpActivity<MyPresenter>
        implements MyView {
 
  @Override protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.my_view);
 
    Button myButton = (Button)findViewById(R.id.my_button);
 
    myButton.setOnClickListener(v -> mPresenter.onButtonPressed());
  }
 
  @Override protected MyPresenter getPresenterInstance() {
    return new MyPresenter();
  }
 
  @Override void redirect(){
    startActivity(new Intent(this,MyOtherActivity.class));
  }

抽象的主持人

public abstract class MvpPresenter<ViewType> {
 
  private ViewType mView;
 
  public void onResume(ViewType view) {
    mView = view;
  }
 
  public void onPause() {
    mView = null;
  }
 
  protected ViewType getView() {
    if (mView == null) {
      throw new IllegalStateException("Presenter view is null");
    }
    return mView;
  }
}

和演示者实现

public class MyPresenter extends MvpPresenter<MyView> {
 
  @Override public void onResume(MyView myView){
    super.onResume(myView);
    Log.("MyPresenter","Presenter resumed");
  }
 
  @Override public void onPause(){
    super.onPause()
    Log.("MyPresenter","Presenter paused");
  }
 
  public void onButtonPressed(){
    getView().redirect();
  }
}

问题出现在getView()触发的“IllegalStateException：Presenter视图为空”.redirect();从MyPresenter.onButtonPressed()方法调用时.

这对我没有任何意义,因为如果侦听器被触发,视图应始终不为null.如果执行仅从MvpActivity.onPause()调用的MvpPresenter.onPause(),则视图仅设置为null.发生这种情况后,我不希望收到任何点击事件,所以我在这里缺少什么？

遗憾的是,我无法通过手动测试应用程序来重现此问题.这些报道来自Crashlytics.

注意：retrolambda用于按钮单击侦听器

更新10/07/2017

解决此问题的一些方法：

–
https://developer.android.com/reference/android/view/View.html#cancelPendingInputEvents()

–
https://github.com/JakeWharton/butterknife/blob/master/butterknife/src/main/java/butterknife/internal/DebouncingOnClickListener.java