android listview实现新闻列表展示效果

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。