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
Android 是一种基于 Linux 的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由 Google 公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用 "安卓" 或 "安致"。
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>
来源: http://www.phperz.com/article/17/0316/326173.html