java.lang.IndexOutOfBoundsException

java.lang.IndexOutOfBoundsException: Invalid index 47, size is 47
    at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
    at java.util.ArrayList.get(ArrayList.java:308)
    at ys.getItem(AbstractFilesBrowserAdapter.java:37)
    at android.widget.AdapterView.getItemAtPosition(AdapterView.java:788)
    at zt$5.onActionItemClicked(BrowseOfflineFragment.java:804)
    at android.widget.AbsListView$MultiChoiceModeWrapper.onActionItemClicked(AbsListView.java:6791)
    at com.android.internal.policy.PhoneWindow$DecorView$ActionModeCallback2Wrapper.onActionItemClicked(PhoneWindow.java:3617)
    at ic$a.onActionItemClicked(SupportActionModeWrapper.java:168)
    at android.support.v7.app.AppCompatDelegateImplV7$b.onActionItemClicked(AppCompatDelegateImplV7.java:1510)
    at android.support.v7.app.AppCompatDelegateImplV7$b.onActionItemClicked(AppCompatDelegateImplV7.java:1510)
    at ib.onMenuItemSelected(StandaloneActionMode.java:137)
    at il.a(MenuBuilder.java:811)
    at in.invoke(MenuItemImpl.java:153)
    at il.performItemAction(MenuBuilder.java:958)
    at il.performItemAction(MenuBuilder.java:948)
    at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:598)
    at android.support.v7.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:139)
    at android.view.View.performClick(View.java:5265)
    at android.view.View$PerformClick.run(View.java:21534)
    at android.os.Handler.handleCallback(Handler.java:815)
    at android.os.Handler.dispatchMessage(Handler.java:104)
    at android.os.Looper.loop(Looper.java:207)
    at android.app.ActivityThread.main(ActivityThread.java:5728)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
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