我們只需要2步：

1、Prestener繼承LifecycleObserver接口
public interface IPresenter extends LifecycleObserver {

@OnLifecycleEvent(Lifecycle.Event.ON_CREATE)
void onCreate(@NotNull LifecycleOwner owner);

@OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
void onDestroy(@NotNull LifecycleOwner owner);

@OnLifecycleEvent(Lifecycle.Event.ON_ANY)
void onLifecycleChanged(@NotNull LifecycleOwner owner,
                        @NotNull Lifecycle.Event event);
 

}
Android官方架構組件:Lifecycle詳解&原理分析
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public class BasePresenter implements IPresenter {

private static final String TAG = "com.qingmei2.module.base.BasePresenter";    

@Override
public void onLifecycleChanged(@NotNull LifecycleOwner owner, @NotNull Lifecycle.Event event) {

}

@Override
public void onCreate(@NotNull LifecycleOwner owner) {
    Log.d("tag", "BasePresenter.onCreate" + this.getClass().toString());
}

@Override
public void onDestroy(@NotNull LifecycleOwner owner) {
    Log.d("tag", "BasePresenter.onDestroy" + this.getClass().toString());
}
 

}

這裏我直接將我想要觀察到Presenter的生命周期事件都列了出來，然後封裝到BasePresenter 中，這樣每一個BasePresenter 的子類都能感知到Activity容器對應的生命周期事件，並在子類重寫的方法中，對應相應行為。

2、在Activity/Fragment容器中添加Observer：
public class MainActivity extends AppCompatActivity {
private IPresenter mPresenter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d("tag", "onCreate" + this.getClass().toString());
    setContentView(R.layout.activity_main);
    mPresenter = new MainPresenter(this);
    getLifecycle().addObserver(mPresenter);//添加LifecycleObserver
}

@Override
protected void onDestroy() {
    Log.d("tag", "onDestroy" + this.getClass().toString());
    super.onDestroy();
}
 

}

如此，每當Activity發生了對應的生命周期改變，Presenter就會執行對應事件註解的方法：

除onCreate和onDestroy事件之外，Lifecycle一共提供了所有的生命周期事件，只要
通過註解進行聲明，就能夠使LifecycleObserver觀察到對應的生命周期事件：

//以下為logcat日誌
01-08 23:21:01.702 D/tag: onCreate class com.qingmei2.mvparchitecture.mvp.ui.MainActivity
01-08 23:21:01.778 D/tag: onCreate class com.qingmei2.mvparchitecture.mvp.presenter.MainPresenter

01-08 23:21:21.074 D/tag: onDestroy class com.qingmei2.mvparchitecture.mvp.presenter.MainPresenter
01-08 23:21:21.074 D/tag: onDestroy class com.qingmei2.mvparchitecture.mvp.ui.MainActivity

public enum Event {
/**

• Constant for onCreate event of the {@link LifecycleOwner}.
  */
  ON_CREATE,
  /**
• Constant for onStart event of the {@link LifecycleOwner}.
  */
  ON_START,
  /**
• Constant for onResume event of the {@link LifecycleOwner}.
  */
  ON_RESUME,
  /**
• Constant for onPause event of the {@link LifecycleOwner}.
  */
  ON_PAUSE,
  /**
• Constant for onStop event of the {@link LifecycleOwner}.
  */
  ON_STOP,
  /**
• Constant for onDestroy event of the {@link LifecycleOwner}.
  */
  ON_DESTROY,
  /**
• An {@link Event Event} constant that can be used to match all events.
  */
  ON_ANY
  }

Android官方架構組件:Lifecycle詳解&迪士尼彩樂園定制開發原理分析