// java.lang.NullPointerException: Attempt to invoke virtual method 'int java.ut
il.ArrayList.size()' on a null object reference
// at com.yanzhenjie.album.app.album.GalleryActivity.onCurrentChanged(Galle
ryActivity.java:79)
// at com.yanzhenjie.album.app.gallery.GalleryView$1.onPageSelected(Gallery
View.java:97)
// at android.support.v4.view.ViewPager.dispatchOnPageSelected(ViewPager.ja
va:1941)
// at android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:680)
// at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.ja
va:664)
// at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.ja
va:625)
// at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:617)
// at android.support.v4.view.ViewPager.pageLeft(ViewPager.java:2880)
// at android.support.v4.view.ViewPager.arrowScroll(ViewPager.java:2841)
// at android.support.v4.view.ViewPager.executeKeyEvent(ViewPager.java:2757
)
// at android.support.v4.view.ViewPager.dispatchKeyEvent(ViewPager.java:273
8)
// at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838)
// at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838)
// at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838)
// at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838)
// at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838)
// at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838)
// at com.android.internal.policy.DecorView.superDispatchKeyEvent(DecorView
.java:541)
// at com.android.internal.policy.PhoneWindow.superDispatchKeyEvent(PhoneWi
ndow.java:1943)
// java.lang.NullPointerException: Attempt to invoke virtual method 'int java.ut il.ArrayList.size()' on a null object reference // at com.yanzhenjie.album.app.album.GalleryActivity.onCurrentChanged(Galle ryActivity.java:79) // at com.yanzhenjie.album.app.gallery.GalleryView$1.onPageSelected(Gallery View.java:97) // at android.support.v4.view.ViewPager.dispatchOnPageSelected(ViewPager.ja va:1941) // at android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:680) // at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.ja va:664) // at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.ja va:625) // at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:617) // at android.support.v4.view.ViewPager.pageLeft(ViewPager.java:2880) // at android.support.v4.view.ViewPager.arrowScroll(ViewPager.java:2841) // at android.support.v4.view.ViewPager.executeKeyEvent(ViewPager.java:2757 ) // at android.support.v4.view.ViewPager.dispatchKeyEvent(ViewPager.java:273 8) // at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838) // at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838) // at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838) // at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838) // at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838) // at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1838) // at com.android.internal.policy.DecorView.superDispatchKeyEvent(DecorView .java:541) // at com.android.internal.policy.PhoneWindow.superDispatchKeyEvent(PhoneWi ndow.java:1943)