android:ListView使用总结

ListView的实现要有一个数组和一个单行的布局文件,同时还要有一个适配器将数组和ListView关联起来

不同内容的ListView,相应的采用不同的适配器

Item为单行文本的ListView,可以使用ArrayAdapter

代码如下:

ListView lv=new ListView(this);ArrayAdapter adapter=new Adapter(this,android.R.layout.simple_list_item_1,数组);lv.setAdapter(adapter);setContentView(lv);

如果Item有多个控件,那么可以使用SimpleAdapter

package com.example.listview1;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.widget.ListView;import android.widget.SimpleAdapter;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);ListView lv=new ListView(this);SimpleAdapter adapter=new SimpleAdapter(this,getData(),R.layout.simple_layout,new String[]{"name","num","grade"},new int[]{R.id.name,R.id.num,R.id.grade});lv.setAdapter(adapter);setContentView(lv);}public List<Map<String,Object>> getData(){List<Map<String,Object>> list=new ArrayList<Map<String,Object>>();Map map=new HashMap();map.put("name","student1");map.put("num", "num1");map.put("grade","grade1");list.add(map);map=new HashMap();map.put("name","student2");map.put("num", "num2");map.put("grade","grade2");list.add(map);map=new HashMap();map.put("name","student3");map.put("num", "num3");map.put("grade","grade3");list.add(map);return list;}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

R.layout.simple_layout文件声明如下:

<?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="horizontal" >    <TextView        android:id="@+id/name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        ></TextView>    <TextView        android:id="@+id/num"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        ></TextView>    <TextView        android:id="@+id/grade"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        ></TextView></LinearLayout>

运行结果: