MVP　设计模式.

Model

主要负责数据交互.
实现数据请求方法，使用回调接口.

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public class MainModel{
	private Context context;
	public MainModel(Context context){
		this.context = context;
	}
	
	public void getGankList(String date, CallBack callBank){
		//网络请求，数据返回给　callBank
	}
}

View

定义接口. 操作各种控件.

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public interface MainView{
	public void setData(List list);
	public void showToast(String msg);
	public Context getContext();
}

Presenter

负责Model和View的交互. 持有Model和View的引用, 调用Model中的接口，在回调中调用View中的方法

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public class MainPresenter{
	private MainView view;
	private MainModel model;
	
	public MainPresenter(MainView view){
		this.view = view;
		model = new MainModel(view.getContext);
	}
	
	public getGankList(String date){
		model.getGankList(date, new CallBack(){
			public void onSuccess(List list){
				view.setData(list);
			}
		})
	}
}

Activity

实现 View 接口
持有 Presenter　的引用

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public class MainActivity extends BaseActivity implements MainView{
	private MainPresenter presenter;
	
	@Override 
	public void onCreate(){
		presenter = new MainPresenter(this);
		presenter.getGankList("2017-02-21");
	}
	
	@Override
	public void setData(List list){
		//给控件赋值..
	}
	@Override
	public void getContext{
		return this;
	}
}