Android Device take Screenshot with ADB - From http://blog.shvetsov.com/2013/02/grab-android-screenshot-to-computer-via.html
# bash only
adb shell screencap -p > screen.png
# using sed
adb shell screencap -p | sed 's/\r$//' > screen.png
# using perl
adb shell screencap -p | perl -pe 's/\x0D\x0A/\x0A/g' > screen.png