Android OkHttp学习使用

用到的第三方包 OkHTTP
     Github地址:https://github.com/square/okhttp

注意：
        这里涉及到了网络操作，所以一定记得加上相关的权限：
  

1. <uses-permission android:name="android.permission.INTERNET" />

一、GET请求：
    

1. package barneyx.com.okhttpdemo;
   
2. 
   
3. import android.support.v7.app.AppCompatActivity;
   
4. import android.os.Bundle;
   
5. import android.view.View;
   
6. import android.widget.TextView;
   
7. 
   
8. import org.w3c.dom.Text;
   
9. 
   
10. import java.io.IOException;
    
11. 
    
12. import okhttp3.Call;
    
13. import okhttp3.Callback;
    
14. import okhttp3.OkHttpClient;
    
15. import okhttp3.Request;
    
16. import okhttp3.Response;
    
17. 
    
18. public class MainActivity extends AppCompatActivity {
    
19. 
    
20.     private String mBaseUrl = "http://192.168.0.17:8080/";
    
21.     private TextView tv;
    
22. 
    
23.     @Override
    
24.     protected void onCreate(Bundle savedInstanceState) {
    
25.         super.onCreate(savedInstanceState);
    
26.         setContentView(R.layout.activity_main);
    
27.         tv = (TextView)findViewById(R.id.t_view);
    
28.     }
    
29. 
    
30.     public void doGet(View view) throws IOException{
    
31.         //1.拿到okHttpClient对象
    
32.         OkHttpClient okHttpClient = new OkHttpClient();
    
33. 
    
34.         //2.构造Reqeust
    
35.         Request.Builder builder = new Request.Builder();
    
36.         Request request =builder.get().url(
    
37.                 mBaseUrl+"user!login?username=bai&password=xiaobai"
    
38.         ).build();
    
39. 
    
40.         //3.将Request封装为Call
    
41.         Call call = okHttpClient.newCall(request);
    
42.         //Response response = call.execute();
    
43. 
    
44.         //4.执行Call
    
45.         call.enqueue(new Callback() {
    
46.             @Override
    
47.             public void onFailure(Call call, IOException e) {
    
48.                 L.e("onFailure"+e.getMessage());
    
49.                 e.printStackTrace();
    
50.             }
    
51. 
    
52.             @Override
    
53.             public void onResponse(Call call, Response response) throws IOException {
    
54.                 L.e("OnResponse:");
    
55.                final String res = response.body().string();
    
56.                 L.e(res);
    
57.                 runOnUiThread(new Runnable() {
    
58.                     @Override
    
59.                     public void run() {
    
60.                         tv.setText(res);
    
61.                     }
    
62.                 });
    
63. 
    
64. 
    
65.             }
    
66.         });
    
67.     }
    
68. }

activity_main.xml布局文件：

1. <?xml version="1.0" encoding="utf-8"?>
   
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   
3.     xmlns:tools="http://schemas.android.com/tools"
   
4.     android:id="@+id/activity_main"
   
5.     android:orientation="vertical"
   
6.     android:layout_width="match_parent"
   
7.     android:layout_height="match_parent"
   
8.     tools:context="barneyx.com.okhttpdemo.MainActivity">
   
9.     <Button
   
10.         android:text="Get"
    
11.         android:onClick="doGet"
    
12.         android:layout_width="match_parent"
    
13.         android:layout_height="wrap_content" />
    
14.     <TextView
    
15.         android:id="@+id/t_view"
    
16.         android:text="hello world"
    
17.         android:gravity="center"
    
18.         android:paddingTop="10dp"
    
19.         android:layout_width="match_parent"
    
20.         android:layout_height="wrap_content" />
    
21. 
    
22. 
    
23. 
    
24. 
    
25. </LinearLayout>