01.OkHttp基本用法

目錄介紹

• 01.OkHttp簡單介紹
• 02.OkHttp簡單使用
• 03.OkHttp的流程圖

01.OkHttp簡單介紹

• 1.支持HTTP2/SPDY
• 2.socket自動選擇最好路線，並支持自動重連
• 3.擁有自動維護的socket連接池，減少握手次數
• 4.擁有隊列線程池，輕鬆寫併發
• 5.擁有Interceptors輕鬆處理請求與響應（比如透明GZIP壓縮）基於Headers的緩存策略

02.OkHttp簡單使用

2.1 Get請求

• get同步請求

  String url = "www.baidu.com/index";
  OkHttpClient okHttpClient = new OkHttpClient();
  Request request = new Request.Builder()
          .url(url)
          .build();
  
  Response response;
  try {
      response = okHttpClient.newCall(request).execute();
      String body = response.body().string();
      Log.d("body---yc---",body);
  } catch (IOException e) {
      e.printStackTrace();
  }
  

• get異步請求

  String url = "www.baidu.com/index";
  OkHttpClient okHttpClient = new OkHttpClient();
  Request request = new Request.Builder()
          .url(url)
          .build();
  okHttpClient.newCall(request).enqueue(new Callback() {
      @Override
      public void onFailure(@NonNull Call call, @NonNull IOException e) {
  
      }
  
      @Override
      public void onResponse(@NonNull Call call, @NonNull Response response) throws IOException {
          String body = response.body().string();
          Log.d("body---yc---",body);
      }
  });
  

2.2 Post請求

• Post同步請求

  String url = "www.baidu.com/index";
  String json = "{\"page\":1,\"name\":\"yc\",\"age\":26}";
  MediaType type = MediaType.parse("application/json; charset=utf-8");
  OkHttpClient client = new OkHttpClient();
  RequestBody body = RequestBody.create(type, json);
  Request request = new Request.Builder()
          .url(url)
          .post(body)
          .build();
  Response response = null;
  try {
      response = client.newCall(request).execute();
      String string = response.body().string();
  } catch (IOException e) {
      e.printStackTrace();
  }
  

• Post異步請求

  String url = "www.baidu.com/index";
  String json = "{\"page\":1,\"name\":\"yc\",\"age\":26}";
  MediaType type = MediaType.parse("application/json; charset=utf-8");
  OkHttpClient client = new OkHttpClient();
  RequestBody body = RequestBody.create(type, json);
  Request request = new Request.Builder()
          .url(url)
          .post(body)
          .build();
  client.newCall(request).enqueue(new Callback() {
      @Override
      public void onFailure(@NonNull Call call, @NonNull IOException e) {
  
      }
  
      @Override
      public void onResponse(@NonNull Call call, @NonNull Response response) throws IOException {
          String string = response.body().string();
      }
  });
  

03.OkHttp的流程圖

• 首先放一張完整流程圖（看不懂沒關係，慢慢往後看）：