NullPointerException在

Question

Since I started targetting android M I'm getting NPE in View.getHardwareLayer on many different machines. Two such errors here:

Exception: java.lang.NullPointerException
 raw
android.view.View.getHardwareLayer (View.java:10178)
android.view.ViewGroup.drawChild (ViewGroup.java:2863)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.support.v4.widget.DrawerLayout.drawChild (DrawerLayout.java:1229)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
com.sothree.slidinguppanel.SlidingUpPanelLayout.drawChild (SlidingUpPanelLayout.java:888)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.draw (View.java:10981)
com.sothree.slidinguppanel.SlidingUpPanelLayout.draw (SlidingUpPanelLayout.java:941)
android.view.View.getDisplayList (View.java:10417)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.draw (View.java:10981)
android.widget.FrameLayout.draw (FrameLayout.java:450)
android.view.View.getDisplayList (View.java:10417)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.draw (View.java:10981)
android.widget.FrameLayout.draw (FrameLayout.java:450)
com.android.internal.policy.impl.PhoneWindow$DecorView.draw (PhoneWindow.java:2126)
android.view.View.getDisplayList (View.java:10417)
android.view.HardwareRenderer$GlRenderer.draw (HardwareRenderer.java:899)
android.view.ViewRootImpl.draw (ViewRootImpl.java:1910)
android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:1634)
android.view.ViewRootImpl.handleMessage (ViewRootImpl.java:2442)
android.os.Handler.dispatchMessage (Handler.java:99)
android.os.Looper.loop (Looper.java:137)
android.app.ActivityThread.main (ActivityThread.java:4456)
java.lang.reflect.Method.invokeNative (Method.java)
dalvik.system.NativeStart.main (NativeStart.java)

And another one:

Fatal Exception: java.lang.NullPointerException
 raw
android.view.View.getHardwareLayer (View.java:10178)
android.view.ViewGroup.drawChild (ViewGroup.java:2863)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.HardwareRenderer$GlRenderer.draw (HardwareRenderer.java:899)
android.view.ViewRootImpl.draw (ViewRootImpl.java:1910)
android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:1634)
android.view.ViewRootImpl.handleMessage (ViewRootImpl.java:2442)
android.os.Handler.dispatchMessage (Handler.java:99)
android.os.Looper.loop (Looper.java:137)
android.app.ActivityThread.main (ActivityThread.java:4456)
java.lang.reflect.Method.invokeNative (Method.java)
dalvik.system.NativeStart.main (NativeStart.java)

Is there any change in M that I should be aware of to get rid of these exceptions?

Answer 1

OK, it appears it was a Support Library bug. As stated by Google :

Fixed crash issues for the Fragment class by limiting the use of hardware layers to Android 4.1 (API level 16) and higher. ( Issue 183896 )

Thank you, GOOOGLE!!!...