Android List Implementation (2) _ cursor list Case Study

Copy codeThe Code is as follows: 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
* Data comes from a cursor, and
* 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 );
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 );
}

}

Note: In this example, you must grant permissions to the program.:Copy codeThe Code is as follows: <uses-permission android: name = "android. permission. READ_CONTACTS"/>

Simple_list_item_2.xmlCopy codeThe Code is as follows: <? 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 before t in compliance with the License.
You may obtain a copy of the License

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>