java.lang.NullPointerException: Attempt to invoke virtual method 'int com.kunfei.bookshelf.widget.my_page.TxtPage.getPosition()' on a null object reference
at com.kunfei.bookshelf.widget.my_page.PageLoader.drawBackground(PageLoader.java:932)
at com.kunfei.bookshelf.widget.my_page.PageLoader.drawBackground(PageLoader.java:861)
at com.kunfei.bookshelf.widget.my_page.PageLoader.drawPage(PageLoader.java:835)
at com.kunfei.bookshelf.widget.my_page.PageView.drawPage(PageView.java:345)
at com.kunfei.bookshelf.widget.my_page.PageLoader.pagingEnd(PageLoader.java:777)
at com.kunfei.bookshelf.widget.my_page.PageView$1.changePage(PageView.java:140)
at com.kunfei.bookshelf.widget.my_page.animation.PageAnimation.scrollAnim(PageAnimation.java:149)
at com.kunfei.bookshelf.widget.my_page.PageView.computeScroll(PageView.java:577)
at android.view.View.updateDisplayListIfDirty(View.java:16183)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3713)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3693)
at android.view.View.updateDisplayListIfDirty(View.java:16159)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3713)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3693)
at android.view.View.updateDisplayListIfDirty(View.java:16159)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3713)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3693)
at android.view.View.updateDisplayListIfDirty(View.java:16159)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3713)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3693)
at android.view.View.updateDisplayListIfDirty(View.java:16159)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3713)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3693)
at android.view.View.updateDisplayListIfDirty(View.java:16159)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3713)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3693)
at android.view.View.updateDisplayListIfDirty(View.java:16159)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:648)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:654)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:762)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2848)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2656)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2263)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1302)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6441)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:876)
at android.view.Choreographer.doCallbacks(Choreographer.java:688)
at android.view.Choreographer.doFrame(Choreographer.java:623)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:862)
at android.os.Handler.handleCallback(Handler.java:754)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:163)
at android.app.ActivityThread.main(ActivityThread.java:6395)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:933)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)