adjust margin
#	modified:   res/values-sw720dp-land/dimens.xml
#	modified:   res/values/dimens.xml
add popupwindow
#	new file:   res/drawable/pop_bg.xml
#	modified:   res/layout/activity_my_popup_window.xml
#	new file:   res/layout/pop.xml
#	modified:   src/com/example/mypopupwindow/MyPopupWindow.java
#	new file:   src/com/example/pop/MyPop.java