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android listview實(shí)現(xiàn)新聞列表展示效果

 更新時(shí)間:2017年03月10日 10:09:06   作者:zhu6201976  
這篇文章主要為大家詳細(xì)介紹了android listview實(shí)現(xiàn)新聞列表展示效果,具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了android listview列表展示效果的具體代碼,供大家參考,具體內(nèi)容如下

1.封裝一些新聞數(shù)據(jù)
2.使用listview展示出來(lái)
3.設(shè)置條目點(diǎn)擊事件,點(diǎn)擊后跳轉(zhuǎn)瀏覽器查看新聞

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 上下文環(huán)境
   * @return 新聞集合
   */
  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 = "鳥(niǎo)瞰暴雨后的武漢 全市已轉(zhuǎn)移16萬(wàn)人次";
      newsBean1.des = "7月5-6日,武漢普降暴雨-大暴雨,中心城區(qū)、蔡甸部分地區(qū)出現(xiàn)特大暴雨。江夏大道湯遜湖大橋段,被湖水沖破的路障。記者賈代騰飛 陳卓攝";
      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 三四十條鱷魚(yú)逃至附近農(nóng)田";
      newsBean2.des = "因強(qiáng)降雨造成內(nèi)澇,安徽省蕪湖市蕪湖縣花橋鎮(zhèn)鱷魚(yú)湖農(nóng)莊所養(yǎng)鱷魚(yú)逃跑至附近農(nóng)田。。據(jù)悉,溜出來(lái)的鱷魚(yú)為散養(yǎng)的揚(yáng)子鱷,比較溫馴。初步預(yù)計(jì)有三四十條,具體數(shù)量未統(tǒng)計(jì),其中最大的約1.8米長(zhǎng)。圖為網(wǎng)友拍攝到的農(nóng)田中的鱷魚(yú)。";
      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 = "暴雨過(guò)后 南京理工大學(xué)變“奇幻森林”";
      newsBean3.des = "近日,持續(xù)強(qiáng)降雨,導(dǎo)致地勢(shì)低洼的南京理工大學(xué)出現(xiàn)嚴(yán)重積水。這一組幾張照片,南理工恍若童話世界中。網(wǎng)友:泡在水中的南理工,也可以倔強(qiáng)地刷出顏值新高度。";
      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="新聞標(biāo)題"
      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="新聞內(nèi)容"
      android:textColor="#666666"
      android:textSize="13sp" />
  </LinearLayout>

</LinearLayout>

以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。

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