package fanggao.qf.okhttptest;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.TextView;import java.io.IOException;import java.io.InputStream;import okhttp3.Callback;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.Response;import okhttp3.ResponseBody;public class MainActivity extends AppCompatActivity {    private TextView textview;    private static final String url = "http://m2.qiushibaike.com/article/list/text?page=1";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button button = (Button) findViewById(R.id.btn_download);        textview = (TextView) findViewById(R.id.tv_text);    }    /**     * 点击下载数据     * @param view     */    public void onClick(View view){        //同步的方式   /*     new Thread(new Runnable() {            @Override            public void run() {                getDataForGet();            }        }).start();*/        //异步  ,不需要开启子线程         getAsyncOkHttp();    }    /**     * 异步:同时执行多个     * 通过get请求获取数据     *     */    private void getAsyncOkHttp() {        OkHttpClient okHttpClient = new OkHttpClient();        Request request = new Request.Builder().get().url(url).build();        //异步:        okHttpClient.newCall(request).enqueue(new Callback() {            @Override            public void onFailure(Request request, IOException e) {            }            @Override            public void onResponse(Response response) throws IOException {                final String string = response.toString();                Log.i("tag","------"+Thread.currentThread().getId());                //不能在子线程中进行UI操作                //在主线程中进行                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        textview.setText(string);                    }                });            }        });    }    /**     * 同步:一次执行一个     * 通过get请求获取数据     */    private void getDataForGet() {        try {        //1.声明okhttp客户端        OkHttpClient okHttpClient = new OkHttpClient();        //2.构造request            //1.声明构造器 ,设置请求方式,设置请求参数        Request request = new Request.Builder().get().url(url).build();        //3.通过客户端执行请求,获得response            Response response = okHttpClient.newCall(request).execute();            //4,判断响应是否成功            if(response.isSuccessful()){                //获得响应实体                ResponseBody body = response.body();                //获得string               final  String string = body.string();                //获得bytep[]                byte[] bytes = body.bytes();                //获得流                InputStream inputStream = body.byteStream();                //在主线程中进行                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        textview.setText(string);                    }                });            }            Log.i("tag",Thread.currentThread().getName());        } catch (IOException e) {            e.printStackTrace();        }    }}