screenshot command: captures screenshot from current device via adb and saves it to your desktop. input an optional filename. save this to /usr/local/bin to use anywhere.

screenshot

#!/bin/bash

# What: Pull screenshot from connected device and save it to the Desktop (on Mac)
# Usage: screenshot
# Examples:
#> screenshot foo
#	(creates [device name]-foo.png on the Desktop)
#> screenshot
#	(creates [device name]-[date_time].png on the Desktop)
# Notes: update FILEPATH to change directory. if you set it to empty ("FILEPATH=") it will save to the current directory.
# Update IGNORE_EMULATORS to ignore any connected emulators.

FILEPATH=~/Desktop/
FILENAME=("-`date +%Y-%m-%d_%H.%M.%S`.png")
IGNORE_EMULATORS=false

if [ $1 ]; then
    FILENAME="-$1.png"
fi

for line in `adb devices | grep -v "List"  | awk '{print $1}'`
do
  DEVICE=`echo $line | awk '{print $1}'`
  
  if [[ $IGNORE_EMULATORS == false || ($IGNORE_EMULATORS == true && $DEVICE != emulator*) ]] 
  then
  	if [ -z "$FILEPATH" ]
  	then
  		echo "saving $DEVICE$FILENAME to current directory"
  	else
  		echo "saving $DEVICE$FILENAME to $FILEPATH"
  	fi
  	adb -s $DEVICE shell screencap -p | perl -pe 's/\x0D\x0A/\x0A/g' > $FILEPATH$DEVICE$FILENAME
  fi
done