为什么我得到画布：试图使用回收的位图android.graphics？

我有4个活动A，B，C和D.为什么我得到画布：试图使用回收的位图android.graphics？

活动A有一个菜单。其中一个选项打开具有列表视图的Activity D。活动A通过按钮打开活动B.活动B通过按钮打开活动C.

活动C有4个ImageViews，我完成后回收它们。

当我做以下情形每一件事情是确定：

甲 - >乙--back到 - >一个 - 单击菜单去d - >OK

当我做了以下情况我得到这个致命异常：

A - > B - > C -back to - > B --back to - > A - 点击菜单去D - >get例外

没有关系在活动D和C之间，但为什么我在这里得到这个例外？

A->B->C (using buttons) 

A-> D (using menu)

05-15 11:33:49.600: E/AndroidRuntime(2722): FATAL EXCEPTION: main 
05-15 11:33:49.600: E/AndroidRuntime(2722): java.lang.RuntimeException: Canvas: trying to use a recycled bitmap [email protected] 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.graphics.Canvas.throwIfRecycled(Canvas.java:1038) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.graphics.Canvas.drawBitmap(Canvas.java:1142) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:393) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.widget.ImageView.onDraw(ImageView.java:924) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.View.draw(View.java:10983) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.drawChild(ViewGroup.java:2887) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.drawChild(ViewGroup.java:2885) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.widget.ListView.drawChild(ListView.java:3223) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.widget.AbsListView.dispatchDraw(AbsListView.java:2092) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.widget.ListView.dispatchDraw(ListView.java:3218) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.View.draw(View.java:11088) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.widget.AbsListView.draw(AbsListView.java:3398) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.drawChild(ViewGroup.java:2887) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.View.draw(View.java:10986) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.drawChild(ViewGroup.java:2887) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.drawChild(ViewGroup.java:2885) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.drawChild(ViewGroup.java:2885) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.View.draw(View.java:10986) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.widget.FrameLayout.draw(FrameLayout.java:450) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2126) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewRootImpl.draw(ViewRootImpl.java:2026) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1634) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.os.Handler.dispatchMessage(Handler.java:99) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.os.Looper.loop(Looper.java:137) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at android.app.ActivityThread.main(ActivityThread.java:4424) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at java.lang.reflect.Method.invokeNative(Native Method) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at java.lang.reflect.Method.invoke(Method.java:511) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
05-15 11:33:49.600: E/AndroidRuntime(2722):  at dalvik.system.NativeStart.main(Native Method)

来源

2012-05-15 breceivemail