android listview实现新闻列表展示效果

xiaoxiao2021-02-28  4

这篇文章主要为大家详细介绍了android listview实现新闻列表展示效果,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

本文实例为大家分享了android listview列表展示效果的具体代码,供大家参考,具体内容如下

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

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; } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 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;    } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 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;   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:

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 <? 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 >

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

listview_item.xml:

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