Presenter 层

后是 Presenter 层，它是处理业务逻辑和业务数据的，所以必须持有 Model 的引用，同时要将处理完的数据交给 View 层用于显示，也必须持有 View 的引用，那么，一开始我们就要把这两层给实例化，具体看下面的代码：

package com.test.mvp.mvpdemo.mvp.v1.presenter;

import com.test.mvp.mvpdemo.mvp.v1.MainContract;
import com.test.mvp.mvpdemo.mvp.v1.model.DataModel;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
* presenter 层，承担业务逻辑处理，数据源处理等
*/
public class MainPresenter implements MainContract.IMainPresenter {

private MainContract.IMainModel mModel;
private MainContract.IMainView mView;

public MainPresenter(MainContract.IMainView view) {
this.mView = view;
mModel = new DataModel();
}

@Override
public void handlerData() {
if (mView != null) {
mView.showDialog();
}
/**
* 发起请求，获得回调数据
*/
mModel.requestBaidu(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}

@Override
public void onResponse(Call call, Response response) throws IOException {
String content = response.body().string();
if (mView != null) {
mView.succes(content);
}
}
});
}
}
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