Shell script to take (and file) a screenshot from an Android device via adb

adbscreenshot.sh

#!/bin/bash
# Installation: configure target directory, and make sure it exists

targetdir=/export/Android/Screenshots

prefix="android"
device=$(adb devices |awk 'NR == 2 {print $1}')
prefix=$device

#############################################
# Formatting: Field Separator, Date format
datefmt="+%Y-%m-%d_%H%M"
#############################################
yesterday=`TZ=CET+24 /bin/date '+%b %e'`
now=`/bin/date ${datefmt}`
utc=`TZ=UTC /bin/date ${datefmt}`
#############################################
targetfile=${prefix}-${now}

cd ${targetdir}
adb shell screencap -p /sdcard/${targetfile}.png && adb pull /sdcard/${targetfile}.png && adb shell rm /sdcard/${targetfile}.png

echo Screenshot saved to ${targetdir}/${targetfile}.png

exit