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Android列表实现(2)_游标列表案例讲解

2019-10-24 21:09:06
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最近开始学习android的ui 游标列表实现,先上几个相关的例子,后续还会有更新,感兴趣的朋友可以研究下
 
复制代码代码如下:

import android.app.ListActivity; 
import android.database.Cursor; 
import android.os.Bundle; 
import android.provider.Contacts.Phones; 
import android.widget.ListAdapter; 
import android.widget.SimpleCursorAdapter; 

/** 
* A list view example where the 
* data comes from a cursor, and a 
* SimpleCursorListAdapter is used to map each item to a two-line 
* display. 
*/ 
public class List3 extends ListActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 

// Get a cursor with all phones 
Cursor c = getContentResolver().query(Phones.CONTENT_URI, null, null, null, null); 
startManagingCursor(c); 

// Map Cursor columns to views defined in simple_list_item_2.xml 
ListAdapter adapter = new SimpleCursorAdapter(this, 
android.R.layout.simple_list_item_2, c, 
new String[] { Phones.NAME, Phones.NUMBER }, 
new int[] { android.R.id.text1, android.R.id.text2 }); 
setListAdapter(adapter); 


}

注意 该例子要给程序赋予权限: 
复制代码代码如下:

<uses-permission android:name="android.permission.READ_CONTACTS"/> 

simple_list_item_2.xml 
复制代码代码如下:

<?xml version="1.0" encoding="utf-8"?> 
<!-- Copyright (C) 2006 The Android Open Source Project 

Licensed under the Apache License, Version 2.0 (the "License"); 
you may not use this file except in compliance with the License. 
You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0 

Unless required by applicable law or agreed to in writing, software 
distributed under the License is distributed on an "AS IS" BASIS, 
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
See the License for the specific language governing permissions and 
limitations under the License. 
--> 

<TwoLineListItem xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:minHeight="?android:attr/listPreferredItemHeight" 
android:mode="twoLine" 


<TextView android:id="@android:id/text1" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:layout_marginLeft="?android:attr/listPreferredItemPaddingLeft" 
android:layout_marginTop="8dip" 
android:textAppearance="?android:attr/textAppearanceListItem" 
/> 

<TextView android:id="@android:id/text2" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:layout_below="@android:id/text1" 
android:layout_alignLeft="@android:id/text1" 
android:textAppearance="?android:attr/textAppearanceSmall" 
/> 

</TwoLineListItem>

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