OKHttpUtils请求网络数据工具类

package com.example.ok_http.Util;

import android.os.Handler;
import android.os.Message;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class OkhttpUtile {
private  MyHandler myHandler = new MyHandler();
private OKHttpGetListener onOKHttpGetListener;

//get
public void get(String url){
OkHttpClient client = new OkHttpClient();
//创建请求对象
Request request = new Request.Builder().url(url).build();
//创建Call请求队列,请求都是放到一个队列里面
Call call = client.newCall(request);
call.enqueue(new Callback() {
//失败，成功的方法都是在子线程里面，不能直接更新UI
@Override
public void onFailure(Call call, IOException e) {
Message message = myHandler.obtainMessage();
message.obj="请求失败";
message.what=0;
myHandler.sendMessage(message);

}

@Override
public void onResponse(Call call, Response response) throws IOException {
Message message = myHandler.obtainMessage();
String json = response.body().string();
message.obj = json;
message.what = 1;
myHandler.sendMessage(message);

}
});

}

//使用接口回调，将接口返回
public  interface OKHttpGetListener{
void error(String error);
void success(String json);
}
//给外部调用的方法
public void setOnOKHttpGetListener(OKHttpGetListener onOKHttpGetListener){
this.onOKHttpGetListener = onOKHttpGetListener;
}

//handler
private class MyHandler extends Handler {
@Override
public void handleMessage(Message msg) {
int w = msg.what;
if (w == 0) {
//请求失败
String error = (String) msg.obj;
onOKHttpGetListener.error(error);
}
if (w == 1) {
String json = (String) msg.obj;
onOKHttpGetListener.success(json);
}

}
}
}

--------------------------------------MainActivity----------------------------------

package com.example.ok_http;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import com.example.ok_http.Util.OkhttpUtile;import com.google.gson.Gson;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity implements View.OnClickListener {public String key = "2f41498b35e69877fc56dc96776e5d1f";public String url = "http://v.juhe.cn/toutiao/index?type=top&key=" + key;private Button get;private ListView lv;ArrayList<NesBean.ResultBean.DataBean> list = new ArrayList<>();private Myadpater md;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initViews();}//初始化控件private void initViews() {get = (Button) findViewById(R.id.get);get.setOnClickListener(this);lv = (ListView) findViewById(R.id.lv);md = new Myadpater();lv.setAdapter(md);}@Overridepublic void onClick(View view) {//创建OKHttpClient对象OkhttpUtile ok = new OkhttpUtile();ok.get(url);

ok.setOnOKHttpGetListener(new OkhttpUtile.OKHttpGetListener() {@Overridepublic void error(String error) {Toast.makeText(MainActivity.this, error, Toast.LENGTH_SHORT).show();}@Overridepublic void success(String json) {//成功就解析数据Gson gson = new Gson();NesBean nesBean = gson.fromJson(json, NesBean.class);List<NesBean.ResultBean.DataBean> data = nesBean.getResult().getData();list.addAll(data);md.notifyDataSetChanged();}});}//适配器class Myadpater extends BaseAdapter {@Overridepublic int getCount() {return list.size();}@Overridepublic Object getItem(int i) {return null;}@Overridepublic long getItemId(int i) {return 0;}@Overridepublic View getView(int i, View view, ViewGroup viewGroup) {TextView textView = new TextView(MainActivity.this);textView.setText(list.get(i).getTitle());return textView;}}}

-------------------------------XML文件--------------------------------------

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context="com.example.ok_http.MainActivity"><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="get请求"android:id="@+id/get"/><ListViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:id="@+id/lv"></ListView></LinearLayout>

-----------------------------------------依赖--------------------------------------

compile 'com.squareup.okhttp3:okhttp:3.4.1'compile 'com.squareup.okio:okio:1.5.0'compile 'com.google.code.gson:gson:2.8.2'