Android Studio OkHttpClient使用教程詳解

更新時間：2020年09月23日 10:47:00 作者：手撕高達的村長

這篇文章主要介紹了Android Studio OkHttpClient使用教程詳解,文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下

本次來記錄下OkHttpClient的使用，OkHttpClient是用來完成android 客戶端對服務端請求的工具。

首先記住，使用網(wǎng)絡的時候一定要加入權限，加入到AndroidMainfest.xml中

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

在初次使用的時候會出現(xiàn)報錯。cannot resolve symbol OkHttpClient

這里需要引入

implementation 'com.squareup.okhttp3:okhttp:3.0.1'
然后刷新下項目就可以了。

代碼：

package com.example.administrator.testclient;


import com.squareup.*;

import java.io.IOException;

import okhttp3.FormBody;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class BaseHttpClient {

 public static final MediaType MEDIA_TYPE_MARKDOWN
   = MediaType.parse("text/x-markdown; charset=utf-8");
 // 01. 定義okhttp
 private final OkHttpClient client = new OkHttpClient();

 public BaseHttpClient(){

  //client.connectTimeoutMillis();
 }


 /**
  * 發(fā)送一個表單請求
  * @throws Exception
  */
 public void SendForm() throws Exception {
  RequestBody formBody = new FormBody.Builder()
    .add("search", "Jurassic Park")
    .build();
  Request request = new Request.Builder()
    .url("https://en.wikipedia.org/w/index.php")
    .post(formBody)
    .build();

  Response response = client.newCall(request).execute();
  if (!response.isSuccessful())
   throw new IOException("Unexpected code " + response);

  System.out.println(response.body().string());
 }

 /**POST 請求
  * 發(fā)送一個string請求
  * @throws Exception
  */
 public void SendPostString() throws Exception {
  String postBody = ""
    + "Releases\n"
    + "--------\n"
    + "\n"
    + " * _1.0_ May 6, 2013\n"
    + " * _1.1_ June 15, 2013\n"
    + " * _1.2_ August 11, 2013\n";

  Request request = new Request.Builder()
    .url("https://api.github.com/markdown/raw")
    .post(RequestBody.create(MEDIA_TYPE_MARKDOWN, postBody))
    .build();

  Response response = client.newCall(request).execute();
  if (!response.isSuccessful())
   throw new IOException("Unexpected code " + response);

  System.out.println(response.body().string());
 }

 /**POST 請求
  * 發(fā)送一個From請求
  * @throws Exception
  */
 public void SendPostFrom() throws Exception {

  RequestBody body = new FormBody.Builder()
    .add("name", "sy")//添加參數(shù)體
    .add("age", "18")
    .build();

  Request request = new Request.Builder()
    .post(body) //請求參數(shù)
    .url("http://123.207.70.54:8080/SpringMvc/hello")
    .build();

  Response response = client.newCall(request).execute();
  if (!response.isSuccessful())
   throw new IOException("Unexpected code " + response);
 }

 /**Get請求
  * 發(fā)送一個From請求
  * @throws Exception
  */
 public void SendGetFrom() throws Exception {

  Request request = new Request.Builder()
    .get() //請求參數(shù)
    .url("http://123.207.70.54:8080/SpringMvc/hello")
    .build();

  Response response = client.newCall(request).execute();
  if (!response.isSuccessful())
   throw new IOException("Unexpected code " + response);
 }

}

測試發(fā)現(xiàn)，上面的用不了，下面放一個測試通過的方法：

public void getDatasyncFactory(){
    new Thread(new Runnable() {
     @Override
     public void run() {
      try {
       OkHttpClient client = new OkHttpClient();//創(chuàng)建OkHttpClient對象
       Request request = new Request.Builder()
         .url("http://123.207.70.54:8080/SpringMvc/hello")//請求接口。如果需要傳參拼接到接口后面。
         .build();//創(chuàng)建Request 對象
       Response response = null;
       response = client.newCall(request).execute();//得到Response 對象
       if (response.isSuccessful()) {
        Log.d("kwwl","response.code()=="+response.code());
        Log.d("kwwl","response.message()=="+response.message());
        Log.d("kwwl","res=="+response.body());
        //此時的代碼執(zhí)行在子線程，修改UI的操作請使用handler跳轉(zhuǎn)到UI線程。
       }
      } catch (Exception e) {
       e.printStackTrace();
      }
     }
    }).start();
   }

返回信息：