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    Android列表实现(2)_游标列表案例讲解

    2018-04-03 22:30:46 次阅读 稿源:互联网
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    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
    代码如下:

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

    simple_list_item_2.xml
    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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