Android开发：浅谈MVP模式应用与内存泄漏问题解决

public class TestModle implements IModle{
  private CallbackListener callback;

  public TestModle(CallbackListener callback) {
    this.callback = callback;
  }
  public interface CallbackListener {
    void onGetData(String data);
  }
  public void getData() {
    new Thread() {
      public void run() {
        callback.onGetData("返回的数据");
      }
    }.start();
  }
}

// 抽象的view层
public interface TestViewInterf extends IView {
  void onGetData(String data);
}

// 具体的View层
public class MainActivity extends Activity implements TestViewInterf{
  private TestPresenter mTestPresenter;

  @Override
  public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // view层将获取数据的任务委派给中介者presenter，并传入自身实例对象，实现TestViewInterf接口
    mTestPresenter = new TestPresenter(this);
    mTestPresenter.getData();
  }

  @Override
  public void onGetData(String data) {
    // View层只做数据展示
    showToast(data);
  }

  private void showToast(String toast) {
    Toast.makeText(this, toast, Toast.LENGTH_LONG).show();
  }
}

public class TestPresenter implements IPresenter{
  IModle modle;
  IView view;
  public TestPresenter(IView view) {
    this.view = view;
  }

  public void getData() {
    // 获取数据的操作实际在Modle层执行
    modle = new TestModle(new CallbackListener() {
      public void onGetData(String data) {
        if (view != null) {
          view.onGetData(data);
        }
      }
    });
    modle.getData();
  }
}

@Override
  public void onDestroy() {
    super.onDestroy();
    mPresenter.destroy();
  }

public void destroy() {
  view = null;
  if(modle != null) {
    modle.cancleTasks();
  }
}

public void cancleTasks() {
  // TODO 终止线程池ThreadPool.shutDown()，AsyncTask.cancle()，或者调用框架的取消任务api
}