DatePicker 闪退 版本0.0.12

ATAL EXCEPTION: main
Process: com.xushizhilian.app.kd.test, PID: 29209
java.lang.NullPointerException: Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference in method 'void android.view.ViewGroup.dispatchDraw(android.graphics.Canvas)'
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4440)
at android.view.View.draw(View.java:24737)
at com.kongzue.dialogx.datepicker.view.WheelView.drawItems(WheelView.java:689)
at com.kongzue.dialogx.datepicker.view.WheelView.onDraw(WheelView.java:648)
at android.view.View.draw(View.java:24728)
at android.view.View.updateDisplayListIfDirty(View.java:23520)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4668)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4641)
at android.view.View.updateDisplayListIfDirty(View.java:23445)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:736)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:745)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:851)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:5653)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:5332)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:4433)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2990)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:10455)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1663)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1672)
at android.view.Choreographer.doCallbacks(Choreographer.java:1189)
at android.view.Choreographer.doFrame(Choreographer.java:1061)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1642)
at android.os.Handler.handleCallback(Handler.java:958)
at android.os.Handler.dispatchMessage(Handler.java:99)

Start with the stack trace in datepicker/view/WheelView.java, especially drawItems at line 689 and onDraw at line 648. Reproduce the DatePicker crash using the reported 0.0.12 version and inspect the null View involved in drawing. Done means the DatePicker no longer throws this NullPointerException during rendering.

Written by the indexing model from the issue text.