Android开发之OKHttp

1.OkHttp已经替代了传统的HttpURLConnection

2.添加依赖库

    compile 'com.squareup.okhttp3:okhttp:3.4.1'

3.创建OkHttpClient实例

OkHttpClient client = new OkHttpClient();

4.创建Request对象

Request request = new Request.Builder() .url(UrlStr) .build();5.创建Call对象，并调用execute()方法发送请求，获取服务器返回的数据 Response response = client.newCall(request).execute();

6.判断是否获取成功

if(response != null && response.isSuccessful()){

7.服务器返回数据的获取

String data = response.body().string();

8.发送POST请求

    8.1构建RequestBody对象

RequestBody requestBody = new FormBody.Builder() .add("username","admin") .add("password","123456") .build();

    8.2 Request.Builder中调用post()方法

Request request = new Request.Builder() .url(downloadUrl) .post(requestBody) .build();