解决内存泄漏

一：写p层的方法

//解耦
public void datach(){
   if (shopView != null){
        shopView = null;
    }
}

二：主页面的方法

@Override
public void onDestroy() {
    super.onDestroy();
    if (shopPresenter != null){
        shopPresenter.datach();
    }
}