OkHttpClient请求数据

//OKHttp请求依赖compile 'com.squareup.okhttp3:okhttp:3.9.0'

public class App extends Application {    //OkHttpClient实例是唯一的, 所有的请求都会通过这个OkHttpClient,所以所有的请求都可能被拦截器拦截,    // 我们可以在这个必经之路,做一些通用的操作,比如打印日志.    private static OkHttpClient okHttpClient;    @Override    public void onCreate() {        super.onCreate();        //建议一个app只有一个OkHttpClient实例        okHttpClient = new OkHttpClient();        okHttpClient = okHttpClient.newBuilder()                .connectTimeout(10, TimeUnit.SECONDS)                .readTimeout(10, TimeUnit.SECONDS)                .addInterceptor(new MyLogInterceptor())//拦截器                .build();    }    public static OkHttpClient okHttpClient() {        return okHttpClient;    }    //拦截器,可以修改header,可以通过拦截器打印日志    public class MyLogInterceptor implements Interceptor {        @Override        public Response intercept(Chain chain) throws IOException {            Request request = chain.request().newBuilder()                    .header("shenfenyanzheng", "zhangsan")                    .build();            HttpUrl url = request.url();            String httpUrl = url.url().toString();            Response response = chain.proceed(request);            int code = response.code();            return response;        }    }}

//在方法中使用

//异步,所以的回调方法里面都是分线程.不能更新ui    //request 设置url     Request request = new Request.Builder()            .url("http://www.baidu.com")            .build();    App.okHttpClient().newCall(request).enqueue(new Callback() {        @Override        public void onFailure(Call call, IOException e) {            runOnUiThread(new Runnable() {                @Override                public void run() {                    Toast.makeText(MainActivity.this, "get失败", Toast.LENGTH_SHORT).show();                }            });        }        @Override        public void onResponse(Call call, Response response) throws IOException {            if (response.isSuccessful()) {                //得到Json串                String json = response.body().string();                //用Gson解析                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        Toast.makeText(MainActivity.this, "成功", Toast.LENGTH_SHORT).show();                    }                });            } else {                //提示用户                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        Toast.makeText(MainActivity.this, "失败", Toast.LENGTH_SHORT).show();                    }                });            }        }    });