添加超过10帧时动态壁纸动画强行关闭？

Question

我正在尝试用一系列启动动画 .png 制作一个简单的动态壁纸...

我正在使用

private static final int NUM_RES = 9;
        private final Bitmap[] mPics = new Bitmap[NUM_RES];
        CubeEngine() {
            Resources res = getResources();
            for (int i = 0; i< NUM_RES; i++) {
                int id = res.getIdentifier("boot_0010" + (i + 1), "drawable", "minghai.wallpaper");
                mPics[i] = BitmapFactory.decodeResource(res, id);
            }
        }

9 似乎是我能达到的最高值。如果我将 NUM_RES 设置为超过 9 的值，我会强制关闭。

我的所有文件都带有标签... boot_00101.png boot_00102.png boot_00103.png boot_00104.png boot_00105.png boot_00106.png boot_00107.png boot_00108.png boot_00109.png boot_00110.png boot_00111.png boot_00112.png boot_00113.png boot_00114.png 等等...我有大约 50 张图像正在尝试使用

有人知道我应该做什么吗？

LOGCAT：

08-21 19:18:43.108: ERROR/AndroidRuntime(6475): FATAL EXCEPTION: main
08-21 19:18:43.108: ERROR/AndroidRuntime(6475): java.lang.NullPointerException
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at android.graphics.Canvas.drawBitmap(Canvas.java:1115)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at minghai.wallpaper.YayoiWallpaper$CubeEngine.drawYayoi(YayoiWallpaper.java:166)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at minghai.wallpaper.YayoiWallpaper$CubeEngine.drawFrame(YayoiWallpaper.java:144)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at minghai.wallpaper.YayoiWallpaper$CubeEngine.onOffsetsChanged(YayoiWallpaper.java:117)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at android.service.wallpaper.WallpaperService$Engine.doOffsetsChanged(WallpaperService.java:669)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at android.service.wallpaper.WallpaperService$IWallpaperEngineWrapper.executeMessage(WallpaperService.java:847)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:61)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at android.os.Looper.loop(Looper.java:123)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at android.app.ActivityThread.main(ActivityThread.java:4627)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at java.lang.reflect.Method.invokeNative(Native Method)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at java.lang.reflect.Method.invoke(Method.java:521)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-21 19:18:43.108: ERROR/AndroidRuntime(6475):     at dalvik.system.NativeStart.main(Native Method)

@Yok 非常感谢你成功了......在某种程度上，我似乎无法超过 30 我遇到了内存错误。很抱歉问，但是您是否知道一种更有效的方法来简单地获得像我想要实现的动画。

08-22 04:35:03.720: ERROR/AndroidRuntime(8783): FATAL EXCEPTION: main
08-22 04:35:03.720: ERROR/AndroidRuntime(8783): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.Bitmap.nativeCreate(Native Method)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.Bitmap.createBitmap(Bitmap.java:468)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.Bitmap.createBitmap(Bitmap.java:435)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:340)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.BitmapFactory.finishDecode(BitmapFactory.java:488)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:462)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:323)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:346)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:372)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at minghai.wallpaper.YayoiWallpaper$CubeEngine.<init>(YayoiWallpaper.java:60)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at minghai.wallpaper.YayoiWallpaper.onCreateEngine(YayoiWallpaper.java:35)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.service.wallpaper.WallpaperService$IWallpaperEngineWrapper.executeMessage(WallpaperService.java:814)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:61)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.os.Looper.loop(Looper.java:123)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at android.app.ActivityThread.main(ActivityThread.java:4627)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at java.lang.reflect.Method.invokeNative(Native Method)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at java.lang.reflect.Method.invoke(Method.java:521)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-22 04:35:03.720: ERROR/AndroidRuntime(8783):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

您的 for 循环更改存在问题：

将 "boot_0010" + (i + 1) 更改为 "boot_00" + (100+ (i + 1))

更改后的循环应该看起来像like ：

       for (int i = 0; i< NUM_RES; i++) {
            int id = res.getIdentifier("boot_00" + (100 + (i + 1)), "drawable", "minghai.wallpaper");
            mPics[i] = BitmapFactory.decodeResource(res, id);
        }

您的循环的问题是，之前它用于获取第 10 个图像的 boot_001010 而不是 boot_00110 。这也是空指针异常的原因，因为 boot_001010 的图像不存在。

Answer 2

当i为9时，表达式"boot_0010" + (i + 1)计算结果为字符串boot_001010；您可能希望它是 boot_00110。