安卓访问网络API

访问网络API

原生：

• java.net.HttpURLConnection;

  • get

      URL url = new URL(urlString);
      HttpURLConnection conn = (HttpURLConnection) url.openConnection();
      
      // 设置连接参数
      conn.setRequestMethod("GET");
      conn.setConnectTimeout(8000);
      conn.setReadTimeout(8000);
      
      if(conn.getResponseCode() == 200){
          // 获取输入流
          InputStream is = conn.getInputStream();
          // 从输入流中读取服务器返回的数据
          String text = Tools.getTextFromStream(is);
      }
    

  • post

      URL url = new URL(urlString);
      HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    
      // 连接参数
      conn.setRequestMethod("POST");
      conn.setConnectTimeout(8000);
      conn.setReadTimeout(8000);
      
      // 要发送的请求数据
      String content = "name=" + URLEncoder.encode(name) + "&pass=" + pass;
      
      // 设置请求头
      conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
      conn.setRequestProperty("Content-Length", content.length() + "");
      
      // 开启客户端输出流
      conn.setDoOutput(true);
      // 获取客户端输出流
      OutputStream os = conn.getOutputStream();
      // 把请求数据发送给服务器
      os.write(content.getBytes());
      
      if(conn.getResponseCode() == 200){
          // 获取输入流
          InputStream is = conn.getInputStream();
          // 从输入流中读取服务器返回的数据
          String text = Tools.getTextFromStream(is);
      }
    

• org.apache.http.client.HttpClient;

  • android 6.0(api 23) SDK，不再提供org.apache.http.*(只保留几个类).

  • get

      HttpClient client = new DefaultHttpClient();
      HttpGet get = new HttpGet(urlString);
      HttpResponse response = client.execute(get);
    
      StatusLine sl = response.getStatusLine();
      if(sl.getStatusCode() == 200){
          HttpEntity entity = response.getEntity();
          InputStream is = entity.getContent();
          String text = Tools.getTextFromStream(is)
      }
    

  • post

      AsyncHttpClient client = new AsyncHttpClient();
      
      RequestParams rp = new RequestParams();
      rp.add("name", name);
      rp.add("pass", pass);
      
      client.get(path, rp, new MyResponseHandler());
      
      class MyResponseHandler extends AsyncHttpResponseHandler{
          @Override
          public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
              // statusCode：状态码
              // Header[] headers：响应头
              // byte[] responseBody：响应正文，是一个字符数组
              String text = new String(responseBody);
          }
      
          @Override
          public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
              String text = new String(responseBody);
          }
      }
    

三方：

• OKhttp（口碑好）：http://blog.csdn.net/lmj623565791/article/details/47911083
• xUtils（功能多）：https://github.com/wyouflf/xUtils