android listview列表展示效果 android listview实现新闻列表展示效果

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;

  }
}

<?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>