OKHttp请求网络数据

最新推荐文章于 2022-04-04 16:33:44 发布

原创最新推荐文章于 2022-04-04 16:33:44 发布 · 520 阅读

CC 4.0 BY-SA版权

本文介绍了一个使用OkHttp库进行网络GET请求的例子。通过创建OkHttpClient实例并定义请求URL，利用回调机制处理请求的成功与失败情况。文章还提供了一个自定义的监听器接口和消息处理机制来更新UI。

package com.lbp.demo04;

import android.os.Handler;
import android.os.Message;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**
 * Created by Administrator on 2018/1/3 0003.
 */

public class OkHttpUtils {
    private OkThhpGetListener okhttplist;
    private MyHandler handler = new MyHandler();
    public void get(String url){
        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder().url(url).build();
        Call call = client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Message msg = new Message();
                msg.obj="失败了";
                msg.what=0;
                handler.sendMessage(msg);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                Message message = handler.obtainMessage();
                String s = response.body().string();
                message.obj=s;
                message.what=1;
                handler.sendMessage(message);
            }
        });
    }

    public interface OkThhpGetListener{
        void error(String error);
        void success(String json);
    }

    public void setOnOkHttpGetListener(OkThhpGetListener okhttplist){
        this.okhttplist=okhttplist;
    }

    class MyHandler extends Handler{
        @Override
        public void handleMessage(Message msg) {
            int i = msg.what;
            if(i==0){
                String error = (String) msg.obj;
                okhttplist.error(error);
            }
            if(i==1){
                String json = (String) msg.obj;
                okhttplist.success(json);
            }
        }
    }
}