ArrayAdapter使用方法

ArrayAdapter是一个简单的适配器，他的作用是将一个数组中的内容放入listView中。listView的item必须为textView。

MainActivity.java

 

 1 package com.kale.listview;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.widget.ArrayAdapter;
 6 import android.widget.ListView;
 7 
 8 public class MainActivity extends Activity {
 9 
10     ListView redLv;
11     @Override
12     protected void onCreate(Bundle savedInstanceState) {
13         super.onCreate(savedInstanceState);
14         setContentView(R.layout.activity_main);
15         
16         redLv = (ListView)findViewById(R.id.red_listView_id);
17         
18         String []arr01 = {"01","02","03","04","05","06"};
19         //将数组送入arrayAdapter，这里的item对象必须是一个textView。
20         //系统已经默认将数组中的信息放入textView了，所以无需指定额外的id
21         ArrayAdapter adapter01 = new ArrayAdapter(this, R.layout.list_item,arr01);
22         //设置adapter
23         redLv.setAdapter(adapter01);
24     }
25 }

 

xml

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6 
 7     
 8     <ListView 
 9         android:id="@+id/red_listView_id"
10         android:layout_width="match_parent"
11         android:layout_height="wrap_content"
12         android:divider="#f00"
13         android:dividerHeight="2dp"
14         android:layout_gravity="center"
15         android:headerDividersEnabled="false"/>
16     
17 
18 LinearLayout>

listview_item.xml

xml version="1.0" encoding="utf-8"?>
 <TextView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/item_textView_id"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_gravity="center_horizontal"
     android:text="Large Text"
     android:gravity="center_horizontal"
     android:textAppearance="?android:attr/textAppearanceLarge" />