ListView是什么?
ListView是一個 數據控件,可以展示從數據庫中讀取的數據。是.net3.5的新控件。
它比gridview更靈活,而且支持多種模板,支持分頁。
文章地址 http://www.cnblogs.com/mmyblogs/p/6058322.html(轉載請保留)
接下來我就為大家演示一個簡單的利用SimpleAdapter實現ListView及其點擊事件的例子。
main.xml主頁面布局
<?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="match_parent" android:orientation="vertical" android:gravity="center"> <ListView android:id="@+id/lv" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>
list_item.xml每個item的排布
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="60dp" android:orientation="horizontal"> <LinearLayout android:layout_width="60dp" android:layout_height="60dp"> <ImageView android:id="@+id/image" android:layout_width="fill_parent" android:layout_height="fill_parent"/> </LinearLayout> <LinearLayout android:layout_width="fill_parent" android:layout_height="60dp" android:orientation="vertical" android:gravity="center"> <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="25sp"/> <TextView android:id="@+id/context" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="15sp"/> </LinearLayout> </LinearLayout>
MainActivity.java核心代碼
import android.app.Activity; import android.os.Bundle; import android.widget.ListView; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.HashMap; import android.widget.SimpleAdapter; import android.view.View; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView; import android.widget.Adapter; import android.widget.Toast; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); List<Map<String,Object>>datalist=new ArrayList<Map<String,Object>>(); ListView lv=(ListView) findViewById(R.id.lv); Map<String,Object> map1=new HashMap<String,Object>(); map1.put("image",R.mipmap.ic_launcher); map1.put("title","AIDE資源"); map1.put("context","AIDE 資源 分享"); Map<String,Object> map2=new HashMap<String,Object>(); map2.put("image",R.mipmap.ic_launcher); map2.put("title","了解AIDE"); map2.put("context","AIDE 了解 分享"); Map<String,Object> map3=new HashMap<String,Object>(); map3.put("image",R.mipmap.ic_launcher); map3.put("title","玩轉AIDE"); map3.put("context","AIDE 玩轉 分享"); Map<String,Object> map4=new HashMap<String,Object>(); map4.put("image",R.mipmap.ic_launcher); map4.put("title","控件之TextView"); map4.put("context","AIDE TextView 分享"); datalist.add(map1); datalist.add(map2); datalist.add(map3); datalist.add(map4); lv.setAdapter(new SimpleAdapter(this,datalist,R.layout.list_item,new String[]{"image","title","context"},new int[]{R.id.image,R.id.title,R.id.context})); lv.setOnItemClickListener(new OnItemClickListener(){ //list點擊事件 @Override public void onItemClick(AdapterView<?> p1, View p2, int p3, long p4) { // TODO: Implement this method switch(p3){ case 0://第一個item Toast.makeText(MainActivity.this,"AIDE 資源 分享",Toast.LENGTH_SHORT).show(); break; case 1://第二個item Toast.makeText(MainActivity.this,"AIDE 了解 分享",Toast.LENGTH_SHORT).show(); break; case 2://第三個item Toast.makeText(MainActivity.this,"AIDE 玩轉 分享",Toast.LENGTH_SHORT).show(); break; } } }); } }