android studio中OkHttp请求数据

 1:首先在GitHub中找到OkHttp 在找到下面那行代码，把下面的那句代码粘贴到build.grable里面

2：在输入这个网站找到OkHttp的网址 ,点击Examples有例子


3：然后直接按着上面的例子,一步步完成，我直接上我的写的一个小案例了，可以改改直接用

package com.example.okhttpdemo;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.widget.ImageView;
import java.io.IOException;
import butterknife.ButterKnife;
import butterknife.InjectView;
import okhttp3.Call;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;

public class MainActivity extends Activity {

    Handler mHandler=new Handler();
    @InjectView(R.id.iv)
    ImageView iv;
    // 图片的网址
    private final String path = "https://ss0.bdstatic.com/5aV1bjqh_Q23odCf/static/superman/img/logo/bd_logo1_31bdc765.png";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.inject(this);
        initData(path);



    }

    private void initData(final String path) {

        new Thread(new Runnable() {
            @Override
            public void run() {


                // 创建okHttpClient
                OkHttpClient client = new OkHttpClient();
                // 创建一个请求
                Request request = new Request.Builder()
                        .url(path)
                        .build();
                //给okhttpClient传入一个请求，这个时候得到一个call
                Call call = client.newCall(request);
                try {
                    Response response = call.execute();
                    int code = response.code();
                    if (code == 200) {
                        ResponseBody body = response.body();
                        byte[] bytes = body.bytes();
                        final Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
                        mHandler.post(new Runnable() {
                            @Override
                            public void run() {
                                iv.setImageBitmap(bitmap);
                            }
                        });

                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }


            }
        }).start();
    }
}
4：在xml文件定义一个ImageView控件

<ImageView
    android:id="@+id/iv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     />