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android listview实现新闻列表展示效果

2019-12-12 03:25:29
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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;}
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;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:

<?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武林网。

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