使用 AnimationDrawable：画布：尝试使用回收的位图

Question

我正在使用 Animation drawable 来显示 gif。我将 gif 拆分为帧，创建了一个动画文件并使用以下方法加载它：

animationImageView.setImageResource(splashAnimationResource);       
animation = (AnimationDrawable) animationImageView.getDrawable();

所有这些都发生在 onResume() 中。动画显示后，在 onPause() 中我尝试释放内存：

for (int frameCounter = 0; frameCounter < animation.getNumberOfFrames(); ++frameCounter) {
        Drawable frame = animation.getFrame(frameCounter);
        if (frame instanceof BitmapDrawable) {
            BitmapDrawable castedFrame = (BitmapDrawable) frame;
            Bitmap bitmap = castedFrame.getBitmap();
            if (bitmap != null && !bitmap.isRecycled())
                bitmap.recycle();
        }
        frame.setCallback(null);
    }
splashAnimation.setCallback(null);

这一切都很好，动画显示正确，内存被释放。如果我尝试再次进入动画活动，它第一次工作，但随后抛出异常：

java.lang.RuntimeException: Canvas: trying to use a recycled bitmap android.graphics.Bitmap@2ee1a817
        at android.graphics.Canvas.throwIfCannotDraw(Canvas.java:1225)
        at android.view.GLES20Canvas.drawBitmap(GLES20Canvas.java:600)
        at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:544)
        at android.graphics.drawable.DrawableContainer.draw(DrawableContainer.java:76)
        at android.widget.ImageView.onDraw(ImageView.java:1187)
        at android.view.View.draw(View.java:16269)
        at android.view.View.updateDisplayListIfDirty(View.java:15192)
        at android.view.View.getDisplayList(View.java:15215)
        at android.view.View.draw(View.java:15990)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3708)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3502)
        at android.view.View.updateDisplayListIfDirty(View.java:15187)
        at android.view.View.getDisplayList(View.java:15215)
        at android.view.View.draw(View.java:15990)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3708)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3502)
        at android.view.View.updateDisplayListIfDirty(View.java:15187)
        at android.view.View.getDisplayList(View.java:15215)
        at android.view.View.draw(View.java:15990)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3708)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3502)
        at android.view.View.updateDisplayListIfDirty(View.java:15187)
        at android.view.View.getDisplayList(View.java:15215)
        at android.view.View.draw(View.java:15990)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3708)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3502)
        at android.view.View.draw(View.java:16272)
        at android.widget.FrameLayout.draw(FrameLayout.java:592)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:3047)
        at android.view.View.updateDisplayListIfDirty(View.java:15192)
        at android.view.View.getDisplayList(View.java:15215)
        at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:307)
        at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:313)
        at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:352)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:2811)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2634)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2222)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1230)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6726)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:777)
        at android.view.Choreographer.doCallbacks(Choreographer.java:590)
        at android.view.Choreographer.doFrame(Choreographer.java:560)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:763)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:145)
        at android.app.ActivityThread.main(ActivityThread.java:6141)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

我真的很困惑。有什么想法吗？

Answer 1

我在敲了几天的头后找到了解决方案。首先，您需要创建较小的图像尺寸，例如我首先使用 400x400 尺寸的框架..然后我减少到 100x100。然后我删除了位图回收的所有代码，因为这个问题没有任何解决方案。那你就玩animation.start() 和.stop() 就很好了。