【学习笔记】android动态壁纸

最近在学习做动态壁纸，这里写下小心得，顺便当做笔记，首先要建一个继承了WallpaperService的类，看下图

可以看到是继承了Service，想要在android动态壁纸里找到你的壁纸，首先要在Manifest里面注册一个sevice，具体如下图

mete-data的那个resource要在xml注册

<?xml version="1.0" encoding="UTF-8"?>  
<wallpaper
xmlns:android="http://schemas.android.com/apk/res/android"   

android:thumbnail="@drawable/thumbnail"  

android:description="@string/description" 

android:settingsActivity="PreferenceActivity"/> 

android:settingsActivity可以添加你的PreferenceActivity，机子里面会多个setting按钮

下面就可以写你的Wallpaper了

public class LiveWallPaper extends WallpaperService {

	@Override
	public Engine onCreateEngine() {
		return new MyEngine();
	}
	class MyEngine extends Engine{
		
		@Override
		public void onCreate(SurfaceHolder surfaceHolder) {			
			super.onCreate(surfaceHolder);
			//设置处理触摸是事件
			setTouchEventsEnabled(true);
			System.out.println("onCreate");
		}
		@Override
		public void onDestroy() {
			super.onDestroy();
			System.out.println("onDestroy");
		}
		//触摸时调用
		@Override
		public void onTouchEvent(MotionEvent event) {
			super.onTouchEvent(event);
		}
		//可见时调用
		@Override
		public void onVisibilityChanged(boolean visible) {
			super.onVisibilityChanged(visible);
			System.out.println("onVisibilityChanged");
		}
		//屏幕大小改变调用
		@Override
		public void onSurfaceChanged(SurfaceHolder holder, int format,
				int width, int height) {
			super.onSurfaceChanged(holder, format, width, height);
			System.out.println("onSurfaceChanged");
		}
		//surface创建时调用
		@Override
		public void onSurfaceCreated(SurfaceHolder holder) {
			super.onSurfaceCreated(holder);
			System.out.println("onSurfaceCreated");
		}
		
		@Override
		public void onSurfaceDestroyed(SurfaceHolder holder) {
			super.onSurfaceDestroyed(holder);
			System.out.println("onSurfaceDestroyed");
		}
		
	}
	
}

其中

@Override
	public Engine onCreateEngine() {
		return new MyEngine();
	}

是必须实现的方法，返回的Engine就是动态壁纸的核心代码

里面的方法

下面是打开壁纸到关闭壁纸的输出

http://www.open-open.com/lib/view/open1331354112077.html

里面的那个三个球的例子很不错