Bash script for uninstalling and installing apk on multiple connected devices at once

installtools.sh

#!/bin/bash

clear

START=$(date +"%s")

function ShowElapsedTime {
echo '' 
end=$(date +"%s")
elapsed=$(($end-$START))
echo "$(($elapsed / 60)) minutes $(($elapsed % 60)) seconds"
echo '' 
}

echo '' 
echo '' 
echo '' 
echo '|||||||||||||||||||||||||||||||' 
echo '|                             |' 
echo '|          Mopsicus           |' 
echo '|         Test tools          |' 
echo '|                             |' 
echo '|||||||||||||||||||||||||||||||' 
echo ''
echo ''
echo ''
echo ''
echo '1 – Uninstall app'
echo '2 – Install app'
echo '3 – Uninstall & install app'
echo '' 
echo '' 
read -n 1 -s -r -p 'Select operation type, ESC to cancel...' key
echo ''
if [ "$key" == $'\e' ]; then
echo '' 
echo '' 
echo 'Operation canceled!'
echo '' 
echo '' 
exit 1
fi
clear
case $key in
1)
echo '' 
echo '' 
echo 'Enter app package name to uninstall, e.g. com.rstgames.XXX and press Enter, Ctrl+C to cancel...'
echo '' 
read -p 'Package name: ' data
echo ''
echo 'Uninstall started'
echo '-------------------------'
adb devices | tail -n +2 | cut -sf 1 | xargs -I {} adb -s {} uninstall $data
;; 
2)
echo '' 
echo '' 
echo 'Enter path to APK file to install, e.g. MyApp.apk and press Enter, Ctrl+C to cancel...' 
echo '' 
read -p 'Path to APK: ' data
echo ''
echo 'Install started'
echo '-------------------------'
adb devices | tail -n +2 | cut -sf 1 | xargs -I {} adb -s {} install $data
;; 
3)
echo '' 
echo '' 
echo 'Enter app package name to uninstall, e.g. com.rstgames.XXX and press Enter, Ctrl+C to cancel...'
echo '' 
read -p 'Package name: ' data
echo ''
echo 'Enter path to APK file to install, e.g. MyApp.apk and press Enter, Ctrl+C to cancel...' 
echo '' 
read -p 'Path to APK: ' data2
echo ''
echo 'Uninstall started'
echo '-------------------------'
adb devices | tail -n +2 | cut -sf 1 | xargs -I {} adb -s {} uninstall $data
echo ''
echo 'Install started'
echo '-------------------------'
adb devices | tail -n +2 | cut -sf 1 | xargs -I {} adb -s {} install $data2
;;
*)
echo '' 
echo '' 
echo 'Unknown operation type!'
echo '' 
echo '' 
exit 1
;;
esac
ShowElapsedTime