OkHttp的用法

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1.activity_main.xml

<?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;    @Override    protected 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);    }    @Override    public 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 Runnable() {            @Override            public 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>

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