Question

11-24 23:19:18.434: ERROR/AndroidRuntime(12660): Uncaught handler: thread main exiting due to uncaught exception
11-24 23:19:18.684: ERROR/AndroidRuntime(12660): java.lang.RuntimeException: Canvas: trying to use a recycled bitmap android.graphics.Bitmap@4384c218
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.graphics.Canvas.throwIfRecycled(Canvas.java:955)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.graphics.Canvas.drawBitmap(Canvas.java:1044)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:291)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.widget.ImageView.onDraw(ImageView.java:908)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.View.draw(View.java:6283)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.drawChild(ViewGroup.java:1581)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1311)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.drawChild(ViewGroup.java:1579)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1311)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.View.draw(View.java:6286)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.drawChild(ViewGroup.java:1581)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1311)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.widget.AbsListView.dispatchDraw(AbsListView.java:1323)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.widget.ListView.dispatchDraw(ListView.java:2933)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.View.draw(View.java:6389)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at         android.widget.AbsListView.draw(AbsListView.java:2142)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.drawChild(ViewGroup.java:1581)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1311)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.drawChild(ViewGroup.java:1579)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1311)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at     android.view.View.draw(View.java:6286)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.drawChild(ViewGroup.java:1581)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1311)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.View.draw(View.java:6286)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewGroup.drawChild(ViewGroup.java:1581)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at     android.view.ViewGroup.dispatchDraw(ViewGroup.java:1311)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.View.draw(View.java:6286)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1928)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewRoot.draw(ViewRoot.java:1454)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewRoot.performTraversals(ViewRoot.java:1174)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1774)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.os.Looper.loop(Looper.java:123)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at android.app.ActivityThread.main(ActivityThread.java:4321)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at java.lang.reflect.Method.invokeNative(Native Method)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at java.lang.reflect.Method.invoke(Method.java:521)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
11-24 23:19:18.684: ERROR/AndroidRuntime(12660):     at dalvik.system.NativeStart.main(Native Method)

我使用SoftReference实现了一个图像缓存，并使用图像缓存中的Bitmap设置了ImageView。

在将位图设置为ImageView之前，我不使用Bitmap.recycle（）并检查Bitmap.isRcycled（）。

我无法弄清楚为什么画布使用可回收的位图进行绘制。它很少发生，但它确实发生了。

有什么建议吗？谢谢！

Answer 1

如果有人来到这里并且正在努力弄清楚哪个位图被回收（就像我做的那样），这就是我最终要做的事情来解决这个问题：
1）我放置了一个转储堆的全局Thread.setDefaultUncaughtExceptionHandler（我实际上已经将它用于诊断OOM错误）。处理程序中的代码是：

File f = new File(Environment.getExternalStorageDirectory(),"oom-error.hprof");
String path = f.getAbsolutePath();
// force a few GC before dumping stuff
System.gc();
System.gc();    
Debug.dumpHprofData(path);

2）使用this精彩文章，您可以了解如何使用MAT加载和分析hprof转储文件。

3）在MAT内部，我首先通过“Bitmap”正则表达式过滤类，然后查找位图引用ID（在OP情况下：“4384c218”）。这将为您提供一个非常好的想法，哪个视图持有此循环位图，您可以开始考虑它的解决方案。（在我的例子中，我正在从公共缓存中回收图像，其中一些是在XML布局中也使用的drawable，并且应该被“固定”到缓存中，直到OnDestroy）。

Answer 2

同样的问题，但现在我已经解决了。重新加载png或其他时尝试这种方式：

BitmapFactory.decodeStream(getResources().openRawResource(R.drawable.png1));

我必须知道png1何时被回收，如果没有，你也可以尝试捕获RuntimeException异常。

Answer 3

您不应该为不同的活动使用相同的图像资源，而其中一个活动正在回收其位图。

如果遇到这种情况，请更改其中一个活动的图像资源。

Canvas：尝试使用循环位图android.graphics.Bitmap

3 个答案: