Functions to take a screen video recording or screenshot on the currently-connected Android device and drop it on your Mac’s Desktop.

AndroidScreenRecording.sh

function androidScreenshot
{
    # only do this if there is a device connected
    adb shell exit 2>/dev/null
    if [[ $? == 0 ]]; then
        # Example filename: ~/Desktop/Android Screen 2013-09-11 12.32.16 PM.png
        # perl line ending hacks from http://blog.shvetsov.com/2013/02/grab-android-screenshot-to-computer-via.html
        dateString=`date +"%Y-%m-%d at %I.%M.%S %p"`
        fileName="Android Screen $dateString.png"
        adb shell screencap -p | perl -pe 's/\x0D\x0A/\x0A/g' > ~/Desktop/$fileName
    else
        echo "No android device connected."
    fi
}

function androidVideo
{
    function unsetLocalFunctions
    {
        unset -f unsetLocalFunctions
        unset -f androidVideoPrintUsage
        unset -f copyAndCleanUpVideo
    }

    function androidVideoPrintUsage
    {
        echo "Usage: adroidVideo [duration]"
        echo
        echo "Options:"
        echo "        -h   Help"
        echo "  duration   Record the video for this many seconds. Must be a positive integer."
        echo
        unsetLocalFunctions
        return 0
    }

    if [[ $1 == "-h" ]]; then
        echo "printing usage 2"
        androidVideoPrintUsage
    fi

    local keepLooping=true
    function copyAndCleanUpVideo
    {
        local thePath=$1
        local theName=$2
        # perl line ending hacks from http://blog.shvetsov.com/2013/02/grab-android-screenshot-to-computer-via.html
        local deviceName=`adb shell getprop ro.product.model | perl -pe 's/\x0D\x0A/\x0A/g'`
        echo "Copying video from your $deviceName..."
        sleep 1
        adb pull $thePath/$theName ~/Desktop/$theName > /dev/null 2>&1
        adb shell rm $thePath/$theName
        trap - SIGINT
        keepLooping=false
        echo "Done."
        unsetLocalFunctions
        return 0
    }

    # only do this if there is a device connected
    adb shell exit 2>/dev/null
    if [[ $? == 0 ]]; then
        local dateString=`date +"%Y-%m-%d at %I.%M.%S %p"`
        local fileName="Android Video $dateString.mp4"
        local filePath=/sdcard/Movies

        local bitRate=8000000 # 8 megabits
        local regex='^[0-9]+$'

        if [[ -z $1 ]]; then
            # no parameters, so run until stopped
            stty -echoctl # suppress ^C from being printed
            adb shell screenrecord $filePath/$fileName > /dev/null &| # the pid of this background process will be $!
            trap "kill -SIGINT $!; copyAndCleanUpVideo '$filePath' '$fileName'; stty echoctl" SIGINT
            echo "Recording screen. Use Ctrl-C to stop recording."
            while $keepLooping; do
            done
        elif [[ $1 =~ $regex && $1 != 0 ]]; then # $1 is an integer, so record the video
            echo "Recording video..."
            adb shell screenrecord --bit-rate $bitRate --time-limit $1 $filePath/$fileName > /dev/null &|
            for n in {$1..0}; do
                if [[ $n == 1 ]]; then
                    local timeUnit="second"
                else
                    local timeUnit="seconds"
                fi
                echo -en "\r$n $timeUnit remaining."
                sleep 1
            done
            echo -en "\r"
            copyAndCleanUpVideo "$filePath" "$fileName"
        else
            echo "Duration is in seconds, and must be a positive integer."
            echo
            echo "printing usage 1"
            androidVideoPrintUsage
            return 1
        fi
    else
        echo "No android device connected."
        unsetLocalFunctions
    fi
}