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1、动态壁纸是在Android 2.1新增的一个功能。动态壁纸可以添加到Android的桌面，具有交互式的动画背景效果。在本教程中，我们将教会你如何去制作一个交互式的动态壁纸。动态壁纸是一个Android应用程序，包括一个服务(WallpaperService)。该服务必须包括一个引擎(WallpaperService.Engine)。该引擎是连接用户、桌面、系统之间的桥梁。它也可以绘制桌面壁纸。首先，必须由内在的Engine类创建一个WallpaperService类。该服务必须在AndroidManifest.xml中声明为android.service.wallpaper.Wallpaper
2、Service，这样它才会作为动态壁纸被手机识别。而且还要在服务配置中附加android.permission.BIND_WALLPAPER的权限许可：?12345678910111213创建一个XML文件，放置在应用程序目录下的/res/xml/中。它用来描述你的动态壁纸。?123456再创建一个xml的属性文件attrs.xml，代码如下：?1234567891011121314动态壁纸的服务代码如下：?1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515
3、25354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105package net.androgames.blog.sample.livewallpaper;import android.content.SharedPreferences;import android.service.wallpaper.WallpaperService;import android.view.MotionEvent;import android.
4、view.SurfaceHolder;/* Android Live Wallpaper Archetype* author antoine vianey* under GPL v3 : http:/www.gnu.org/licenses/gpl-3.0.html*/public class LiveWallpaperService extends WallpaperService Overridepublic Engine onCreateEngine() return new SampleEngine();Overridepublic void onCreate() super.onCr
5、eate();Overridepublic void onDestroy() super.onDestroy();public class SampleEngine extends Engine private LiveWallpaperPainting painting;SampleEngine() SurfaceHolder holder = getSurfaceHolder();painting = new LiveWallpaperPainting(holder, getApplicationContext();Overridepublic void onCreate(SurfaceH
6、older surfaceHolder) super.onCreate(surfaceHolder);/ register listeners and callbacks heresetTouchEventsEnabled(true);Overridepublic void onDestroy() super.onDestroy();/ remove listeners and callbacks herepainting.stopPainting();Overridepublic void onVisibilityChanged(boolean visible) if (visible) /
7、 register listeners and callbacks herepainting.resumePainting(); else / remove listeners and callbacks herepainting.pausePainting();Overridepublic void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) super.onSurfaceChanged(holder, format, width, height);painting.setSurfaceS
8、ize(width, height);Overridepublic void onSurfaceCreated(SurfaceHolder holder) super.onSurfaceCreated(holder);/ start paintingpainting.start();Overridepublic void onSurfaceDestroyed(SurfaceHolder holder) super.onSurfaceDestroyed(holder);boolean retry = true;painting.stopPainting();while (retry) try painting.join();retry = false; c
