add metric
#	modified:   FloatingWindow/res/layout/main.xml
#	new file:   FloatingWindow/src/com/example/utils/Metrics.java
#	modified:   FloatingWindow/src/com/example/window/FloatingWindow.java
#	modified:   FloatingWindow/src/com/example/window/FloatingWindowService.java
#	new file:   android-demos/src/com/example/utils/Metrics.java
Merge branch 'master' of https://github.com/victoryckl/android-demos