新闻案例本地版(listview实现)

来源：互联网发布：光纤网络监控方案编辑：程序博客网时间：2024/06/05 16:44

package com.itheima74.newscustom.domain;import android.graphics.drawable.Drawable;/** * Created by My on 2016/11/8. */public class NewsBean {    public String title;    public String des;    public Drawable icon;    public String news_url;}

package com.itheima74.newscustom.utils;import android.content.Context;import com.itheima74.newscustom.R;import com.itheima74.newscustom.domain.NewsBean;import java.util.ArrayList;/** * Created by My on 2016/11/8. */public class NewsUtils {    /**     * @param context 上下文环境     * @return 新闻集合     */    public static ArrayList<NewsBean> getAllNews(Context context) {        ArrayList<NewsBean> arrayList = new ArrayList<>();        for (int i = 0; i < 5; i++) {            NewsBean newsBean1 = new NewsBean();            newsBean1.title = "鸟瞰暴雨后的武汉 全市已转移16万人次";            newsBean1.des = "7月5-6日，武汉普降暴雨-大暴雨，中心城区、蔡甸部分地区出现特大暴雨。江夏大道汤逊湖大桥段，被湖水冲破的路障。记者贾代腾飞 陈卓摄";            newsBean1.icon = context.getResources().getDrawable(R.drawable.wuhan);            newsBean1.news_url = "http://slide.news.sina.com.cn/s/slide_1_2841_101020.html#p=1";            arrayList.add(newsBean1);            NewsBean newsBean2 = new NewsBean();            newsBean2.title = "安徽暴雨 三四十条鳄鱼逃至附近农田";            newsBean2.des = "因强降雨造成内涝，安徽省芜湖市芜湖县花桥镇鳄鱼湖农庄所养鳄鱼逃跑至附近农田。。据悉，溜出来的鳄鱼为散养的扬子鳄，比较温驯。初步预计有三四十条，具体数量未统计，其中最大的约1.8米长。图为网友拍摄到的农田中的鳄鱼。";            newsBean2.icon = context.getResources().getDrawable(R.drawable.eyu);            newsBean2.news_url = "http://slide.news.sina.com.cn/s/slide_1_2841_101024.html#p=1";            arrayList.add(newsBean2);            NewsBean newsBean3 = new NewsBean();            newsBean3.title = "暴雨过后 南京理工大学变“奇幻森林”";            newsBean3.des = "近日，持续强降雨，导致地势低洼的南京理工大学出现严重积水。这一组几张照片，南理工恍若童话世界中。网友：泡在水中的南理工，也可以倔强地刷出颜值新高度。";            newsBean3.icon = context.getResources().getDrawable(R.drawable.qihuan);            newsBean3.news_url = "http://slide.news.sina.com.cn/s/slide_1_2841_101010.html#p=1";            arrayList.add(newsBean3);        }        return arrayList;    }}

package com.itheima74.newscustom.activity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import com.itheima74.newscustom.R;import com.itheima74.newscustom.domain.NewsBean;import com.itheima74.newscustom.utils.NewsUtils;import java.util.ArrayList;/** * 1.封装一些新闻数据 * 2.使用listview展示出来 * 3.设置条目点击事件,点击后跳转浏览器查看新闻 */public class MainActivity extends AppCompatActivity {    private ListView lv;    private ArrayList<NewsBean> mList;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initUI();        initData();        initAdapter();    }    private void initAdapter() {        lv.setAdapter(new NewsAdapter());    }    private void initData() {        mList = NewsUtils.getAllNews(this);    }    private void initUI() {        lv = (ListView) findViewById(R.id.lv);        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                Intent intent = new Intent();                intent.setAction(Intent.ACTION_VIEW);                intent.setData(Uri.parse(mList.get(position).news_url));                startActivity(intent);            }        });    }    private class NewsAdapter extends BaseAdapter {        @Override        public int getCount() {            return mList.size();        }        @Override        public NewsBean getItem(int position) {            return mList.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            ViewHolder holder;            if (convertView == null) {                holder = new ViewHolder();                convertView = View.inflate(getApplicationContext(), R.layout.listview_item, null);                holder.tv_title = (TextView) convertView.findViewById(R.id.tv_title);                holder.tv_des = (TextView) convertView.findViewById(R.id.tv_des);                holder.iv_icon = (ImageView) convertView.findViewById(R.id.iv_icon);                convertView.setTag(holder);            } else {                holder = (ViewHolder) convertView.getTag();            }            NewsBean item = getItem(position);            holder.tv_title.setText(item.title);            holder.tv_des.setText(item.des);            holder.iv_icon.setImageDrawable(item.icon);            return convertView;        }    }    private static class ViewHolder {        TextView tv_title;        TextView tv_des;        ImageView iv_icon;    }}

listview_item:<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:gravity="center"    android:orientation="horizontal"    android:padding="10dp">    <ImageView        android:id="@+id/iv_icon"        android:layout_width="100dp"        android:layout_height="80dp"        android:layout_marginEnd="10dp"        android:layout_marginRight="10dp"        android:src="@mipmap/ic_launcher" />    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="vertical">        <TextView            android:id="@+id/tv_title"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginBottom="3dp"            android:maxLines="1"            android:text="新闻标题"            android:textColor="#000000"            android:textSize="16sp" />        <TextView            android:id="@+id/tv_des"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:maxLines="2"            android:text="新闻内容"            android:textColor="#666666"            android:textSize="13sp" />    </LinearLayout></LinearLayout>

0 0