android手机壁纸

android手机系统含有两种壁纸，一种是默认壁纸，还有一种是其他的。

默认壁纸一般存储在framework里：frameworks\base\core\res\res\drawable-nodpi\default_wallpaper.png

其他壁纸存储在Launcher里：packages\apps\Launcher3\WallpaperPicker\res，我们在packages\apps\Launcher3\WallpaperPicker\res\drawable-nodpi目录下存放了一些壁纸，原图和其小图，其中Launcher不一定为Launcher3，也可以为Launcher2，关键看你手机用的是哪个launcher。我们需要在packages\apps\Launcher3\WallpaperPicker\res\values-nodpi\目录下对wallpapers.xml文件进行修改：

<?xml version="1.0" encoding="utf-8"?>
<!--
 * Copyright (C) 2009 Google Inc.
 *
 * 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.
 -->

<resources>
    <string-array name="wallpapers" translatable="false">
	<item>wallpaper_01</item>
	<item>wallpaper_02</item>
        <item>wallpaper_03</item>
        <item>wallpaper_04</item>
	<item>wallpaper_05</item>
	<item>wallpaper_06</item>
    </string-array>
</resources>

上图中，红色部分就是其他壁纸，长按桌面，弹出小部件和壁纸，点击壁纸，就会显示出默认壁纸和其他壁纸了。