Handler网络请求数据解析

最新推荐文章于 2022-08-10 09:02:23 发布

OrangeBoys

最新推荐文章于 2022-08-10 09:02:23 发布

阅读量407

点赞数

CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/qq_43573190/article/details/85003357

本文介绍了一个基于Android的图片加载与数据更新机制的实现。通过使用Universal Image Loader库和Gson进行JSON解析，文章详细阐述了如何在Android应用中异步加载图片并更新UI。同时，还展示了如何通过Handler机制处理线程间通信，实现数据的实时更新。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

package com.example.kanghuwei20181214;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.widget.ListView;

import com.google.gson.Gson;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.ArrayList;
import java.util.List;

public class TwoActivity extends AppCompatActivity {
    private String url="http://api.tianapi.com/meinv/?key=3304a8bc9414f97e30928b80163cf098&num=";
    private List<ListBean.NewslistBean>list = new ArrayList<>();
    private ListView lv;
    private MyBase adapter;
    private ImageLoader imageLoaderstance;
    private int page;
    @SuppressLint("HandlerLeak")
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what == 1){
                String string = (String) msg.obj;
                Gson gson = new Gson();
                ListBean listBean = gson.fromJson(string, ListBean.class);
                List<ListBean.NewslistBean> data = listBean.getNewslist();
                list.addAll(data);
                adapter.notifyDataSetChanged();
            }
        }
    };
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_two);
        lv = findViewById(R.id.lv);
        imageLoaderstance = ImageLoader.getInstance();

        initData(page);

        adapter = new MyBase(list,TwoActivity.this,imageLoaderstance);
        lv.setAdapter(adapter);
    }
    private void initData(final int page){
        new Thread(){
            @Override
            public void run() {
                super.run();
                String json = NetUtils.getJson(url);
                Message message = handler.obtainMessage();
                message.what = 1;
                message.obj = json;
                handler.sendMessage(message);
            }
        }.start();
    }
}