java.lang.RuntimeException: Canvas: trying to use a recycled bitmap [email protected] at android.graphics.BaseCanvas.throwIfCannotDraw(BaseCanvas.java:55) at android.view.DisplayListCanvas.throwIfCannotDraw(DisplayListCanvas.java:226) at android.view.RecordingCanvas.drawBitmap(RecordingCanvas.java:97) at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:529) at android.view.View.getDrawableRenderNode(View.java:19377) at android.view.View.drawBackground(View.java:19313) at android.view.View.draw(View.java:19110) at android.view.View.updateDisplayListIfDirty(View.java:18069) at android.view.View.draw(View.java:18847) at android.view.ViewGroup.drawChild(ViewGroup.java:4214) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000) at android.view.View.updateDisplayListIfDirty(View.java:18060) at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198) at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178) at android.view.View.updateDisplayListIfDirty(View.java:18028) at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198) at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178) at android.view.View.updateDisplayListIfDirty(View.java:18028) at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198) at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178) at android.view.View.updateDisplayListIfDirty(View.java:18028) at android.view.View.draw(View.java:18847) at android.view.ViewGroup.drawChild(ViewGroup.java:4214) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000) at android.view.View.updateDisplayListIfDirty(View.java:18060) at android.view.View.draw(View.java:18847) at android.view.ViewGroup.drawChild(ViewGroup.java:4214) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000) at android.view.View.updateDisplayListIfDirty(View.java:18060) at android.view.View.draw(View.java:18847) at android.view.ViewGroup.drawChild(ViewGroup.java:4214) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000) at android.view.View.updateDisplayListIfDirty(View.java:18060) at android.view.View.draw(View.java:18847) at android.view.ViewGroup.drawChild(ViewGroup.java:4214) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000) at android.view.View.updateDisplayListIfDirty(View.java:18060) at android.view.View.draw(View.java:18847) at android.view.ViewGroup.drawChild(ViewGroup.java:4214) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000) at android.view.View.draw(View.java:19122) at com.android.internal.policy.DecorView.draw(DecorView.java:785) at android.view.View.updateDisplayListIfDirty(View.java:18069) at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:643) at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:649) at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:757) at android.view.ViewRootImpl.draw(ViewRootImpl.java:2980) at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2794) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2347) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1386) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6733) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911) at android.view.Choreographer.doCallbacks(Choreographer.java:723) at android.view.Choreographer.doFrame(Choreographer.java:658) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897) at android.os.Handler.handleCallback(Handler.java:789) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6541) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 08-13 06:44:54.834 21842-21842/com.picart.snapfilter.squareblur E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
解決：
以上兩篇建議新建ImageView，重寫onDraw（）
報錯： drawBitmap catch some exceptions
失敗
這篇建議註釋掉onDestroy
失敗
這篇建議定位使用了已回收圖片的地方，直接註釋掉
這篇worked，but I didn't locate the error position sucessfully
我怎麼找到的呢：找我最近改動的幾個java檔案，command＋F：recycle，然後註釋掉，執行一下，發現確實可以解決這個error。
但是還存在一個問題，我寫的listview是很多張圖片，在我點選圖1，然後點選圖2，……，然後點選圖6，再返回點選圖2時候，肉眼可以看見背景變化過程中有圖1的快取，雖然這個變化過程很快但是我看見了……
出錯的在這裡
public void recycleDrawable(Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
Bitmap bmp = ((BitmapDrawable) drawable).getBitmap();
if (bmp != null && !bmp.isRecycled()) {
// bmp.recycle();//必須註釋掉
bmp = null;
}
}
}