OKhttp的封装（下）

OKhttpManager2.Class  请求工具类

 package com.example.administrator.okhttp3;

 import android.os.Handler;
 import android.os.Looper;

 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;

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

 /**
  * 当前类： OKhttp 工具封装类
  * <p/>
  * Created by ${火龙裸先生} on 2016/9/30.
  * 邮箱：791335000@qq.com
  */
 public class OkhttpManager2 {

     private OkHttpClient client;
     private static OkhttpManager2 okhttpManager2;
     private Handler mHandler;

     /**
      * 单例模式 OKhttpManager2实例
      */
     private static OkhttpManager2 getInstance() {
         if (okhttpManager2 == null) {
             okhttpManager2 = new OkhttpManager2();
         }
         return okhttpManager2;
     }

     private OkhttpManager2() {
         client = new OkHttpClient();
         mHandler = new Handler(Looper.getMainLooper());
     }

     //******************  内部逻辑处理方法  ******************/
     private Response p_getSync(String url) throws IOException {
         Request request = new Request.Builder().url(url).build();
         Response response = client.newCall(request).execute();
         return response;
     }

     private String p_getSyncAsString(String url) throws IOException {
         return p_getSync(url).body().string();
     }

     private void p_getAsync(String url, final DataCallBack callBack) {
         final Request request = new Request.Builder().url(url).build();
         client.newCall(request).enqueue(new Callback() {
             @Override
             public void onFailure(Call call, IOException e) {
                 deliverDataFailure(request, e, callBack);
             }

             @Override
             public void onResponse(Call call, Response response) {
                 try {
                     String result = response.body().string();
                     deliverDataSuccess(result, callBack);
                 } catch (IOException e) {
                     e.printStackTrace();
                     deliverDataFailure(request, e, callBack);
                 }
             }
         });
     }

     private void p_postAsync(String url, Map<String, String> params, final DataCallBack callBack) {
         RequestBody requestBody = null;
         if (params == null) {
             params = new HashMap<String, String>();
         }
         FormBody.Builder builder = new FormBody.Builder();
         for (Map.Entry<String, String> entry : params.entrySet()) {
             String key = entry.getKey().toString();
             String value = null;
             if (entry.getValue() == null) {
                 value = "";
             } else {
                 value = entry.getValue().toString();
             }
             builder.add(key, value);
         }
         requestBody = builder.build();
         final Request request = new Request.Builder().url(url).post(requestBody).build();
         client.newCall(request).enqueue(new Callback() {
             @Override
             public void onFailure(Call call, IOException e) {
                 deliverDataFailure(request, e, callBack);
             }

             @Override
             public void onResponse(Call call, Response response) throws IOException {
                 try {
                     String result = response.body().string();
                     deliverDataSuccess(result, callBack);
                 } catch (IOException e) {
                     e.printStackTrace();
                     deliverDataFailure(request, e, callBack);
                 }
             }
         });
     }

     //******************  数据分发的方法  ******************/
     private void deliverDataFailure(final Request request, final IOException e, final DataCallBack callBack) {
         mHandler.post(new Runnable() {//发送到主线程
             @Override
             public void run() {
                 if (callBack != null) {
                     callBack.requestFailure(request, e);
                 }
             }
         });
     }

     private void deliverDataSuccess(final String result, final DataCallBack callBack) {
         mHandler.post(new Runnable() {//同样 发送到主线程
             @Override
             public void run() {
                 if (callBack != null) {
                     callBack.requestSuccess(result);
                 }
             }
         });
     }

     //******************  对外公布的方法  ******************/
     public static Response getSync(String url) throws IOException {
         return getInstance().p_getSync(url);//同步GET，返回Response类型数据
     }

     public static String getSyncAsString(String url) throws IOException {
         return getInstance().p_getSyncAsString(url);//同步GET，返回String类型数据（和上面getSync方法只是返回的数据类型不同而已）
     }

     public static void getAsync(String url, DataCallBack callBack) {
         getInstance().p_getAsync(url, callBack);//异步GET 调用方法
     }

     public static void postAsync(String url, Map<String, String> params, DataCallBack callBack) {
         getInstance().p_postAsync(url, params, callBack);//POST提交表单 调用方法
     }

     //******************  数据回调接口  ******************/
     public interface DataCallBack {
         void requestFailure(Request request, IOException e);

         void requestSuccess(String result);
     }
 }

MainActivity.class   工具类的调用方法

 package com.example.administrator.okhttp3;

 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;

 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;

 import okhttp3.Request;

 public class MainActivity extends AppCompatActivity implements View.OnClickListener {

     private Button button1, button2, button3, button4;
     private TextView textView;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         button1 = (Button) findViewById(R.id.btn_one);
         button2 = (Button) findViewById(R.id.btn_two);
         button3 = (Button) findViewById(R.id.btn_three);
         button4 = (Button) findViewById(R.id.btn_four);
         button1.setOnClickListener(this);
         button2.setOnClickListener(this);
         button3.setOnClickListener(this);
         button4.setOnClickListener(this);
         textView = (TextView) findViewById(R.id.tv);
     }

     @Override
     public void onClick(View view) {
         switch (view.getId()) {
             case R.id.btn_one://同步GET
                 new Thread(new Runnable() {
                     @Override
                     public void run() {
                         try {
 //                            调用getSync方法（以下两行），和调用getSyncAsString方法相同，只是返回数据类型不一样
 //                            Response response = OkhttpManager2.getSync("http://cache.video.iqiyi.com/jp/avlist/202861101/1/?callback=jsonp9");
 //                            final String message = response.body().string();
 //                            调用getSyncAsString方法（以下一行）
                             final String message = OkhttpManager2.getSyncAsString("http://cache.video.iqiyi.com/jp/avlist/202861101/1/?callback=jsonp9");
                             runOnUiThread(new Runnable() {
                                 @Override
                                 public void run() {
                                     textView.setText(message);
                                 }
                             });
                         } catch (IOException e) {
                             e.printStackTrace();
                         }
                     }
                 }).start();
                 break;
             case R.id.btn_two://异步GET
                 OkhttpManager2.getAsync("http://web.juhe.cn:8080/finance/exchange/rmbquot", new OkhttpManager2.DataCallBack() {
                     @Override
                     public void requestFailure(Request request, IOException e) {
                         //数据加载成功会执行此方法，此时可以直接更新UI
                         textView.setText(e.toString());
                     }

                     @Override
                     public void requestSuccess(String result) {
                         //数据加载成功会执行此方法，此时可以直接更新UI
                         textView.setText(result);
                     }
                 });
                 break;
             case R.id.btn_three://POST提交表单
                 Map<String, String> params = new HashMap<String, String>();
                 params.put("cellphone", "123456");//用户名
                 params.put("password", "123456");//密码
                 OkhttpManager2.postAsync("http://58.250.31.19:28080/afeducation/appfront/main/loginUser_app.do", params, new OkhttpManager2.DataCallBack() {
                     @Override
                     public void requestFailure(Request request, IOException e) {
                         //数据加载成功会执行此方法，此时可以直接更新UI
                         textView.setText(e.toString());
                     }

                     @Override
                     public void requestSuccess(String result) {
                         //数据加载成功会执行此方法，此时可以直接更新UI
                         textView.setText(result);
                     }
                 });
                 break;
             case R.id.btn_four://文件下载

                 break;
         }
     }
 }

activity_main.xml   布局文件

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.example.administrator.okhttp3.MainActivity">

     <Button
         android:id="@+id/btn_one"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="同步get" />

     <Button
         android:id="@+id/btn_two"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="异步get" />

     <Button
         android:id="@+id/btn_three"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Post提交表单" />

     <Button
         android:id="@+id/btn_four"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="文件下载" />

     <TextView
         android:id="@+id/tv"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="text" />
 </LinearLayout>

个人觉得主要得注意的地方是，任何更新UI操作，都必须要在主线程中才能更新，而网络请求操作，则需要放在子线程。这里通过接口回调和数据分发的方式，利用Handler发送到主线程，实现UI的更新。