mvp展示

分包

1创建ibase接口然后用imainView继承ibaseview

package com.example.lian.view.interfaces;

import com.example.lian.model.bean.NewsBean;

lic interface IMainView extends IBaseView {
    void callBackSuccess(NewsBean data);
    void cakkBackFail(int code,String err);
}

2创建bean类然后httputils

package com.example.lian.model.utils;

import com.google.gson.Gson;

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

pulic class HttpUtils<T> {

    private static HttpUtils httpUtils;

    public static HttpUtils getInstance(){
        if (httpUtils==null){
            httpUtils = new HttpUtils();
            return httpUtils;
        }else{
            return httpUtils;
        }
    }
    public T getData(String path,Class<T> tClass){
        try {
            URL url = new URL(path);
            HttpURLConnection urlConnection =(HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("GET");
            if (urlConnection.getResponseCode()==200){
                InputStream inputStream = urlConnection.getInputStream();
                ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
                byte[] bytes = new byte[1024];
                int length=0;
                while ((length=inputStream.read(bytes))!=-1){
                    byteArrayOutputStream.write(bytes,0,length);
                }
                String value=byteArrayOutputStream.toString();
                Gson gson = new Gson();
                T t = gson.fromJson(value, tClass);
                return t;
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
    public String postData(String path,String post){
        URL url=null;
        try {
            url = new URL(path);
            HttpURLConnection httpURLConnection =(HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream());
            printWriter.write(post);
            printWriter.flush();
            BufferedInputStream stream = new BufferedInputStream(httpURLConnection.getInputStream());
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            int len;
            byte[] arr = new byte[1024];
            while ((len=stream.read(arr))!=-1){
                bos.write(arr,0,len);
                bos.flush();
            }
            bos.close();
            return bos.toString("utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

3创建basepresenter然后mainpresenter层继承basepresenter

package com.example.lian.presenter;

import com.example.lian.model.bean.NewsBean;
import com.example.lian.model.utils.HttpUtils;
import com.example.lian.view.interfaces.IMainView;

pulic class MainPresenter extends BasePresenter {

    private IMainView view;
    private HttpUtils httpUtils;

    public MainPresenter(){
        httpUtils=HttpUtils.getInstance();
    }
    public void getHomeData(final String url){
        new Thread(new Runnable() {
            @Override
            public void run() {
                NewsBean data =(NewsBean) httpUtils.getData(url, NewsBean.class);
                view.callBackSuccess(data);
            }
        }).start();
    }
    public void setView(IMainView view){
        this.view=view;
    }
}

4mainactivity

package com.example.lian.view.activity;

import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;

import com.example.lian.R;
import com.example.lian.model.bean.NewsBean;
import com.example.lian.presenter.MainPresenter;
import com.example.lian.view.adapter.MyAdapter;
import com.example.lian.view.interfaces.IBaseView;
import com.example.lian.view.interfaces.IMainView;

import java.util.List;

public class MainActivity extends AppCompatActivity implements IMainView {

    private String path = "http://result.eolinker.com/iYXEPGn4e9c6dafce6e5cdd23287d2bb136ee7e9194d3e9?uri=one";
    private MainPresenter mainPresenter;

    Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            NewsBean newsBean =(NewsBean) msg.obj;
            List<NewsBean.DataBean> data = newsBean.getData();
            MyAdapter myAdapter=new MyAdapter(data,MainActivity.this);
            listView.setAdapter(myAdapter);
        }
    };
    private ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initData();
        //Log.e("myMessage","main"+Thread.currentThread().toString());
    }

    @Override
    protected void onResume() {
        super.onResume();
        loadDataFromNet();
    }

    private void initView() {
        listView = findViewById(R.id.ListView);
    }

    private void initData() {
        mainPresenter = new MainPresenter();
        mainPresenter.setView(this);
    }

    private void loadDataFromNet() {
        mainPresenter.getHomeData(path);
    }

    @Override
    public void callBackSuccess(NewsBean data) {
        Message message = handler.obtainMessage();
        message.obj=data;
        message.what=1;
        handler.sendMessage(message);
    }

    @Override
    public void cakkBackFail(int code, String err) {

    }
}