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。