MVP框架 简单使用

//关于接口地址的封装public class APIMain {    public static String mainUrl = "https://www.zhaoapi.cn/ad/getAd";}//view层  
public class MainActivity extends AppCompatActivity implements IMainView{    private Presenter presenter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);       /* mvp       * //当要获取数据的时候,通知presenter,,,presenter再去通知model获取数据        //view层有一个presenter的引用,,,,presenter要有model的应用        //model获取的道具之后,传给presenter...presnter再去传给view层        //接口回调....model里面有presenter实现了接口的引用....presenter需要有view实现了接口的引用        //view层有一个presenter的引用       * */        presenter = new Presenter(this);        presenter.getData(APIMain.mainUrl);    }    @Override    public void onSuccess(final DataDataBean dataBean) {        //数据拿回来解析        runOnUiThread(new Runnable() {            @Override            public void run() {                Toast.makeText(MainActivity.this,dataBean.getData().get(0).getTitle(),Toast.LENGTH_SHORT).show();            }        });    }    @Override    public void onError() {    }}
------------------接口-----------------
public interface IMainView {    void onSuccess(DataDataBean dataBean);    void onError();}
//presenter层
  
public class Presenter implements IMainP{       private IMainView iMainView;    public Presenter(IMainView iMainView) {        this.iMainView = iMainView;    }    private ModelImp modelImp;    public void getData(String mainUrl) {        //通知model去解析数据        modelImp = new ModelImp(this);          modelImp.getData(mainUrl);    }    @Override    public void onSuccess(DataDataBean dataBean) {      iMainView.onSuccess(dataBean);    }    @Override    public void onError() {    }}
----------------接口-----------
public interface IMainP {    void onSuccess(DataDataBean dataBean);    void onError();}
//model层
  
public class ModelImp {    private IMainP iMainP;    public ModelImp(IMainP iMainP) {        this.iMainP = iMainP;    }    //解析数据的方法    public void getData(String mainUrl) {        OkHttpClient okhttp=new OkHttpClient();        Request request = new Request.Builder()                .url(mainUrl)                .build();     okhttp.newCall(request).enqueue(new Callback() {         @Override         public void onFailure(Call call, IOException e) {         }         @Override         public void onResponse(Call call, Response response) throws IOException {         if(response.isSuccessful()){             String string = response.body().string();             DataDataBean dataDataBean = new Gson().fromJson(string, DataDataBean.class);                  //通过接口回调  将解析出来的信息返回去                 iMainP.onSuccess(dataDataBean);         }         }     });    }}