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今天就跟大家聊聊有關如何在android中利用listview實現一個列表展示效果,可能很多人都不太了解,為了讓大家更加了解,小編給大家總結了以下內容,希望大家根據這篇文章可以有所收獲。
1.設置條目點擊事件
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 = "鳥瞰暴雨后的武漢 全市已轉移16萬人次"; newsBean1.des = "7月5-6日,武漢普降暴雨-大暴雨,中心城區、蔡甸部分地區出現特大暴雨。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 三四十條鱷魚逃至附近農田"; newsBean2.des = "因強降雨造成內澇,安徽省蕪湖市蕪湖縣花橋鎮鱷魚湖農莊所養鱷魚逃跑至附近農田。。據悉,溜出來的鱷魚為散養的揚子鱷,比較溫馴。初步預計有三四十條,具體數量未統計,其中最大的約1.8米長。圖為網友拍攝到的農田中的鱷魚。"; 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 = "暴雨過后 南京理工大學變“奇幻森林”"; newsBean3.des = "近日,持續強降雨,導致地勢低洼的南京理工大學出現嚴重積水。這一組幾張照片,南理工恍若童話世界中。網友:泡在水中的南理工,也可以倔強地刷出顏值新高度。"; 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="新聞內容" android:textColor="#666666" android:textSize="13sp" /> </LinearLayout> </LinearLayout>
看完上述內容,你們對如何在android中利用listview實現一個列表展示效果有進一步的了解嗎?如果還想了解更多知識或者相關內容,請關注億速云行業資訊頻道,感謝大家的支持。
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