2011.09.21——— android 動(dòng)態(tài)壁紙開(kāi)發(fā)
參考: http://www.ophonesdn.com/article/show/278
resources/articles/live-wallpapers.html
自己做了一個(gè)非常簡(jiǎn)單的 只是想了解過(guò)程 源碼見(jiàn)附件 步驟如下:
1、新建一個(gè)Android工程? 然后進(jìn)入工程的/res/文件夾,刪除layout這個(gè)文件夾,當(dāng)然里面的main.xml也會(huì)被刪除的,對(duì)于Live Wallpaper來(lái)說(shuō)傳統(tǒng)的布局文件是不需要的。
2、在res下面新建一個(gè)xml文件夾 然后新建一個(gè)mylivewallpaper.xml 內(nèi)容如下:
這里的android:thumbnail值得是你這個(gè)動(dòng)態(tài)壁紙的小圖標(biāo) 會(huì)在你選著動(dòng)態(tài)壁紙的時(shí)候出現(xiàn) 如下圖:
這個(gè)可以自己選一個(gè)好看一點(diǎn)的
3、開(kāi)始編寫代碼了? 直接看吧
實(shí)現(xiàn)的效果是一個(gè)動(dòng)態(tài)改變的時(shí)間 如下圖:
我們一一來(lái)解釋:
onCreateEngine() :
啟動(dòng)一個(gè)WallpaperService.Engine 這個(gè)engine才是負(fù)責(zé)繪制壁紙以及響應(yīng)與用戶交互事件的核心部件 這個(gè)方法也是必須要重寫的 并且是WallpaperService和service的主要區(qū)別
onOffsetsChanged():
這個(gè)一般在幾個(gè)屏幕滑動(dòng)的時(shí)候調(diào)用 而且 當(dāng)你拖動(dòng)A屏幕向B屏幕過(guò)度時(shí) 會(huì)隨著B屏幕的顯示面積的變大或者變小一直調(diào)用這個(gè)方法
onVisibilityChanged()
這個(gè)是屏幕顯示或者不顯示的時(shí)候調(diào)用的 必須完全覆蓋屏幕才會(huì)調(diào)用
onCommand()
可以給壁紙發(fā)送一些命令 讓其執(zhí)行
onTouchEvent()
處理壁紙的點(diǎn)擊時(shí)間的
setTouchEventsEnabled(true)
作用是使壁紙能響應(yīng)touch event,默認(rèn)是false
其他的看名字應(yīng)該就知道了 呵呵
這里也說(shuō)下Engine的慣用寫法吧
4、在AndroidManifes.xml里面注冊(cè)service
除了
5、自己的一些關(guān)于方法執(zhí)行順序的測(cè)試信息:
當(dāng)進(jìn)入改壁紙的設(shè)置頁(yè)面 但是還沒(méi)有設(shè)置時(shí)
09-21 07:55:05.575: INFO/System.out(1337): service onCreate
09-21 07:55:05.614: INFO/System.out(1337): service onCreateEngine
09-21 07:55:05.634: INFO/System.out(1337): MyEngine
09-21 07:55:05.663: INFO/System.out(1337): onCreate
09-21 07:55:05.746: INFO/System.out(1337): onSurfaceCreated
09-21 07:55:05.753: INFO/System.out(1337): onSurfaceChanged
09-21 07:55:05.785: INFO/System.out(1337): onVisibilityChanged
當(dāng)點(diǎn)擊設(shè)置壁紙按鈕后
09-21 07:55:19.434: INFO/System.out(1337): onTouchEvent
09-21 07:55:19.574: INFO/System.out(1337): onTouchEvent
09-21 07:55:20.283: INFO/System.out(1337): service onCreateEngine
09-21 07:55:20.294: INFO/System.out(1337): MyEngine
09-21 07:55:20.304: INFO/System.out(1337): onCreate
09-21 07:55:20.414: INFO/System.out(1337): onSurfaceCreated
09-21 07:55:20.424: INFO/System.out(1337): onSurfaceChanged
09-21 07:55:20.443: INFO/System.out(1337): onVisibilityChanged
09-21 07:55:20.443: INFO/System.out(1337): onoffsetsChanged
09-21 07:55:20.863: INFO/System.out(1337): onVisibilityChanged
09-21 07:55:21.305: INFO/System.out(1337): onSurfaceDestoryed
09-21 07:55:21.333: INFO/System.out(1337): onDestroy
在壁紙上面點(diǎn)擊
09-21 07:55:34.654: INFO/System.out(1337): onTouchEvent
09-21 07:55:34.754: INFO/System.out(1337): onTouchEvent
09-21 07:55:34.754: INFO/System.out(1337): onCommand
啟動(dòng)其他程序 完全覆蓋屏幕
09-21 07:56:03.855: INFO/System.out(1337): onTouchEvent
09-21 07:56:03.884: INFO/System.out(1337): onTouchEvent
09-21 07:56:04.494: INFO/System.out(1337): onVisibilityChanged
設(shè)置其他壁紙 代替自己的壁紙
09-21 07:56:34.893: INFO/System.out(1337): onSurfaceDestoryed
09-21 07:56:34.893: INFO/System.out(1337): onDestroy
09-21 07:56:34.953: INFO/System.out(1337): service onDestory
另:Engine的生命周期:
參考: http://www.ophonesdn.com/article/show/278
resources/articles/live-wallpapers.html
自己做了一個(gè)非常簡(jiǎn)單的 只是想了解過(guò)程 源碼見(jiàn)附件 步驟如下:
1、新建一個(gè)Android工程? 然后進(jìn)入工程的/res/文件夾,刪除layout這個(gè)文件夾,當(dāng)然里面的main.xml也會(huì)被刪除的,對(duì)于Live Wallpaper來(lái)說(shuō)傳統(tǒng)的布局文件是不需要的。
2、在res下面新建一個(gè)xml文件夾 然后新建一個(gè)mylivewallpaper.xml 內(nèi)容如下:
<?xml version="1.0" encoding="utf-8"?> <wallpaper xmlns:android="http://schemas.android.com/apk/res/android" android:thumbnail="@drawable/icon" />
這里的android:thumbnail值得是你這個(gè)動(dòng)態(tài)壁紙的小圖標(biāo) 會(huì)在你選著動(dòng)態(tài)壁紙的時(shí)候出現(xiàn) 如下圖:

這個(gè)可以自己選一個(gè)好看一點(diǎn)的
3、開(kāi)始編寫代碼了? 直接看吧
package com.lp.wallpaper; import java.text.SimpleDateFormat; import java.util.Date; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.os.Bundle; import android.os.Handler; import android.service.wallpaper.WallpaperService; import android.view.MotionEvent; import android.view.SurfaceHolder; public class MyWallpaper extends WallpaperService{ private Handler handler = new Handler(); @Override public void onCreate() { System.out.println("service onCreate"); super.onCreate(); } @Override public void onDestroy() { System.out.println("service onDestory"); super.onDestroy(); } @Override public Engine onCreateEngine() { System.out.println("service onCreateEngine"); return new MyEngine(); } private class MyEngine extends Engine{ private float x = 200; private float y = 300; private Paint mPaint; private boolean mVisible = false; private Runnable drawThread = new Runnable() { public void run() { drawWallpaper(); } }; public MyEngine(){ System.out.println("MyEngine"); mPaint = new Paint(); mPaint.setColor(Color.RED); mPaint.setAntiAlias(true); mPaint.setStrokeWidth(4); mPaint.setStyle(Paint.Style.STROKE); mPaint.setTextSize(24); } @Override public Bundle onCommand(String action, int x, int y, int z, Bundle extras, boolean resultRequested) { // TODO Auto-generated method stub System.out.println("onCommand"); return super.onCommand(action, x, y, z, extras, resultRequested); } @Override public void onCreate(SurfaceHolder surfaceHolder) { System.out.println("onCreate"); super.onCreate(surfaceHolder); //作用是使壁紙能響應(yīng)touch event,默認(rèn)是false setTouchEventsEnabled(true); } @Override public void onDestroy() { System.out.println("onDestroy"); super.onDestroy(); handler.removeCallbacks(drawThread); } @Override public void onOffsetsChanged(float xOffset, float yOffset, float xOffsetStep, float yOffsetStep, int xPixelOffset, int yPixelOffset) { // TODO Auto-generated method stub System.out.println("onoffsetsChanged"); super.onOffsetsChanged(xOffset, yOffset, xOffsetStep, yOffsetStep, xPixelOffset, yPixelOffset); } @Override public void onVisibilityChanged(boolean visible) { System.out.println("onVisibilityChanged"); mVisible = visible; if (visible) { //開(kāi)始 handler.postDelayed(drawThread, 50); } else { handler.removeCallbacks(drawThread); } } @Override public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) { System.out.println("onSurfaceChanged"); // TODO Auto-generated method stub super.onSurfaceChanged(holder, format, width, height); } @Override public void onSurfaceCreated(SurfaceHolder holder) { System.out.println("onSurfaceCreated"); super.onSurfaceCreated(holder); } @Override public void onSurfaceDestroyed(SurfaceHolder holder) { System.out.println("onSurfaceDestoryed"); // TODO Auto-generated method stub super.onSurfaceDestroyed(holder); handler.removeCallbacks(drawThread); } @Override public void onTouchEvent(MotionEvent event) { System.out.println("onTouchEvent"); // TODO Auto-generated method stub super.onTouchEvent(event); } private void drawWallpaper() { SurfaceHolder holder = getSurfaceHolder(); Canvas canvas = holder.lockCanvas(); drawTime(canvas); holder.unlockCanvasAndPost(canvas); //循環(huán)執(zhí)行 handler.postDelayed(drawThread, 50); } private void drawTime(Canvas canvas) { Date date = new Date(System.currentTimeMillis()); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); String dataStr = sdf.format(date); canvas.save(); canvas.drawColor(0xff00ff00); canvas.drawText(dataStr, x, y, mPaint); canvas.restore(); } } }
實(shí)現(xiàn)的效果是一個(gè)動(dòng)態(tài)改變的時(shí)間 如下圖:

我們一一來(lái)解釋:
onCreateEngine() :
啟動(dòng)一個(gè)WallpaperService.Engine 這個(gè)engine才是負(fù)責(zé)繪制壁紙以及響應(yīng)與用戶交互事件的核心部件 這個(gè)方法也是必須要重寫的 并且是WallpaperService和service的主要區(qū)別
onOffsetsChanged():
這個(gè)一般在幾個(gè)屏幕滑動(dòng)的時(shí)候調(diào)用 而且 當(dāng)你拖動(dòng)A屏幕向B屏幕過(guò)度時(shí) 會(huì)隨著B屏幕的顯示面積的變大或者變小一直調(diào)用這個(gè)方法
onVisibilityChanged()
這個(gè)是屏幕顯示或者不顯示的時(shí)候調(diào)用的 必須完全覆蓋屏幕才會(huì)調(diào)用
onCommand()
可以給壁紙發(fā)送一些命令 讓其執(zhí)行
onTouchEvent()
處理壁紙的點(diǎn)擊時(shí)間的
setTouchEventsEnabled(true)
作用是使壁紙能響應(yīng)touch event,默認(rèn)是false
其他的看名字應(yīng)該就知道了 呵呵
這里也說(shuō)下Engine的慣用寫法吧
private class MyEngine extends Engine{ //這里定義一個(gè)線程 private Runnable drawThread = new Runnable() { public void run() { drawWallpaper(); } }; //構(gòu)造方法里面 一般初始化Paint對(duì)象 public MyEngine(){ System.out.println("MyEngine"); mPaint = new Paint(); mPaint.setColor(Color.RED); mPaint.setAntiAlias(true); mPaint.setStrokeWidth(4); mPaint.setStyle(Paint.Style.STROKE); mPaint.setTextSize(24); } //這里 調(diào)用setTouchEventsEnabled(true);即可 @Override public void onCreate(SurfaceHolder surfaceHolder) { System.out.println("onCreate"); super.onCreate(surfaceHolder); //作用是使壁紙能響應(yīng)touch event,默認(rèn)是false setTouchEventsEnabled(true); } //取消callback @Override public void onDestroy() { System.out.println("onDestroy"); super.onDestroy(); handler.removeCallbacks(drawThread); } //當(dāng)顯示的時(shí)候 綁定callback 不顯示時(shí) 取消callback @Override public void onVisibilityChanged(boolean visible) { System.out.println("onVisibilityChanged"); mVisible = visible; if (visible) { //開(kāi)始 handler.postDelayed(drawThread, 50); } else { handler.removeCallbacks(drawThread); } } @Override public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) { System.out.println("onSurfaceChanged"); // TODO Auto-generated method stub super.onSurfaceChanged(holder, format, width, height); } @Override public void onSurfaceCreated(SurfaceHolder holder) { System.out.println("onSurfaceCreated"); super.onSurfaceCreated(holder); } //取消callback @Override public void onSurfaceDestroyed(SurfaceHolder holder) { System.out.println("onSurfaceDestoryed"); // TODO Auto-generated method stub super.onSurfaceDestroyed(holder); handler.removeCallbacks(drawThread); } //處理點(diǎn)擊事件 比如說(shuō) 點(diǎn)擊時(shí) 出現(xiàn)水波等 @Override public void onTouchEvent(MotionEvent event) { System.out.println("onTouchEvent"); // TODO Auto-generated method stub super.onTouchEvent(event); } //得到surfaceholder和canvas 并調(diào)用核心處理方法 private void drawWallpaper() { SurfaceHolder holder = getSurfaceHolder(); Canvas canvas = holder.lockCanvas(); drawTime(canvas); holder.unlockCanvasAndPost(canvas); //循環(huán)執(zhí)行 handler.postDelayed(drawThread, 50); } //核心處理方法 private void drawTime(Canvas canvas) { } }
4、在AndroidManifes.xml里面注冊(cè)service
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.lp.wallpaper"> <uses-sdk android:minSdkVersion="7" /> <uses-feature android:name="android.software.live_wallpaper" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <service android:label="@string/app_name" android:name=".MyWallpaper" android:permission="android.permission.BIND_WALLPAPER"> <intent-filter> <action android:name="android.service.wallpaper.WallpaperService" /> </intent-filter> <meta-data android:name="android.service.wallpaper" android:resource="@xml/mylivewallpaper" /> </service> </application> </manifest>
除了
android:resource="@xml/mylivewallpaper"是可以自己修改 其他的都是必須得 特別強(qiáng)調(diào)幾個(gè):
<uses-sdk android:minSdkVersion="7" /> <uses-feature android:name="android.software.live_wallpaper" /> android:permission="android.permission.BIND_WALLPAPER"
5、自己的一些關(guān)于方法執(zhí)行順序的測(cè)試信息:
當(dāng)進(jìn)入改壁紙的設(shè)置頁(yè)面 但是還沒(méi)有設(shè)置時(shí)
09-21 07:55:05.575: INFO/System.out(1337): service onCreate
09-21 07:55:05.614: INFO/System.out(1337): service onCreateEngine
09-21 07:55:05.634: INFO/System.out(1337): MyEngine
09-21 07:55:05.663: INFO/System.out(1337): onCreate
09-21 07:55:05.746: INFO/System.out(1337): onSurfaceCreated
09-21 07:55:05.753: INFO/System.out(1337): onSurfaceChanged
09-21 07:55:05.785: INFO/System.out(1337): onVisibilityChanged
當(dāng)點(diǎn)擊設(shè)置壁紙按鈕后
09-21 07:55:19.434: INFO/System.out(1337): onTouchEvent
09-21 07:55:19.574: INFO/System.out(1337): onTouchEvent
09-21 07:55:20.283: INFO/System.out(1337): service onCreateEngine
09-21 07:55:20.294: INFO/System.out(1337): MyEngine
09-21 07:55:20.304: INFO/System.out(1337): onCreate
09-21 07:55:20.414: INFO/System.out(1337): onSurfaceCreated
09-21 07:55:20.424: INFO/System.out(1337): onSurfaceChanged
09-21 07:55:20.443: INFO/System.out(1337): onVisibilityChanged
09-21 07:55:20.443: INFO/System.out(1337): onoffsetsChanged
09-21 07:55:20.863: INFO/System.out(1337): onVisibilityChanged
09-21 07:55:21.305: INFO/System.out(1337): onSurfaceDestoryed
09-21 07:55:21.333: INFO/System.out(1337): onDestroy
在壁紙上面點(diǎn)擊
09-21 07:55:34.654: INFO/System.out(1337): onTouchEvent
09-21 07:55:34.754: INFO/System.out(1337): onTouchEvent
09-21 07:55:34.754: INFO/System.out(1337): onCommand
啟動(dòng)其他程序 完全覆蓋屏幕
09-21 07:56:03.855: INFO/System.out(1337): onTouchEvent
09-21 07:56:03.884: INFO/System.out(1337): onTouchEvent
09-21 07:56:04.494: INFO/System.out(1337): onVisibilityChanged
設(shè)置其他壁紙 代替自己的壁紙
09-21 07:56:34.893: INFO/System.out(1337): onSurfaceDestoryed
09-21 07:56:34.893: INFO/System.out(1337): onDestroy
09-21 07:56:34.953: INFO/System.out(1337): service onDestory
另:Engine的生命周期:

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