java - 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.pngboot_00102.pngboot_00103.pngboot_00104.pngboot_00105.pngboot_00106.pngboot_00107.pngboot_00108.pngboot_00109.pngboot_00110.pngboot_00111.pngboot_00112.pngboot_00113.pngboot_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？

日志:

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:

“boot_0010”+ (i + 1) 到 “boot_00”+ (100+ (i + 1))

更改后的循环应如下所示:

       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);
        }

循环的问题在于，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。