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java.lang.ArrayIndexOutOfBoundsException: length=4; index=4	at android.support.v4.widget.ViewDragHelper.saveLastMotion(ViewDragHelper.java:849)	at android.support.v4.widget.ViewDragHelper.shouldInterceptTouchEvent(ViewDragHelper.java:1057)	at android.support.v4.widget.DrawerLayout.onInterceptTouchEvent(DrawerLayout.java:1434)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2366)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)	at com.android.internal.policy.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2831)