OkHttp的用法

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="@+id/activity_main"
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.sh.newworktest.MainActivity">

<Button
android:id="@+id/send_request"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Send Request"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
android:id="@+id/responst_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</ScrollView>
</LinearLayout>

2.MainActivity.java

public class MainActivity extends AppCompatActivity implements View.OnClickListener {TextView responseText;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button sendRequest =(Button)findViewById(R.id.send_request);responseText =(TextView)findViewById(R.id.responst_text);sendRequest.setOnClickListener(this);}@Overridepublic void onClick(View v) {switch (v.getId()){case R.id.send_request:// sendRequestWithHttpURLConnection();sendRequestWithOkHttp();break;default:}}private void sendRequestWithOkHttp(){//开启线程来发起网络的请求new Thread(new Run4000nable() {@Overridepublic void run() {try {//1.先创建一个OkHttpClient的实例OkHttpClient client = new OkHttpClient();// 2.想要发出一条Http请求，就需要创建一个Request的对象Request request = new Request.Builder().url("http://www.baidu.com").build();//3.调用OkHttpClient的newCall（）方法来创建一个Call对象，并调用它的execute方法来发送请求服务器返回的数据Response response = client.newCall(request).execute();String responseData = response.body().string();showResponse(responseData);} catch (Exception e){e.printStackTrace();}}}).start();}}

3.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest package="com.sh.newworktest"xmlns:android="http://schemas.android.com/apk/res/android">......<uses-permission android:name="android.permission.INTERNET"/></manifest>