网络请求在主线程里面直接封装

这是网络请求的精华，代码量很小

public class Utills {

    private volatile  static Utills  utills;

   private   OkHttpClient client;

    private   Handler handler;

    //单例保证该方法执行后只能在同一时间使用同一个对象

    public static synchronized  Utills getInstance(){

        if (utills == null) {

            utills=new Utills();

        }

        return utills;

    }

    //构造方法

    public Utills() {

        this.handler = new Handler();

        client =new OkHttpClient();

    }

    //创建接口是为了实现异步调用

    interface CallBacks{

        void getString(String ss);

    }

    //请求网络的方法  注意凡是在callback中的方法都是在子线程中执行

    public void getNetData(String url, final CallBacks callBacks){

        Request request=new Request.Builder().url(url).build();

        client.newCall(request).enqueue(new Callback() {

            @Override//请求网络失败，失败的原因可以通过IOException e该参数转成String打印出来

            public void onFailure(Call call, IOException e) {

                System.out.println("====="+e.toString());

            }

            @Override//请求网络成功，请求回来的数据在response中保存，请求的内容在Call任务中保存，同样可以打印出来

            public void onResponse(final Call call, Response response) throws IOException {

               final String result= response.body().string();

                //为什么要使用handler.post是为了把内容发送到主线程中

                handler.post(new Runnable() {

                    @Override

                    public void run() {

                        //run里面的方法都在主线中

                        callBacks.getString(result);

                    }

                });

            }

        });

    }

}

2.网路请求的数据简单封装

public class OkhttpUtils {

private static OkHttpClient client = new OkHttpClient();
private static OkhttpUtils utils = new OkhttpUtils();

public OkhttpUtils() {

}

private static OkhttpUtils okHttpUtils() {
return utils;
}

public void dogetAsync(String url, Callback callback) {
Request request = new Request.Builder().url(url).build();
client.newCall(request).enqueue(callback);

}

public String dogetTB(String url) {
Request request = new Request.Builder().url(url).build();
try {
Response execute = client.newCall(request).execute();
String string = execute.body().string();
return string;

} catch (IOException e) {
e.printStackTrace();
return null;
}
}
}