Bash for Android automation - Can't compare variable resulting from read\awk

You can use a case statement to get the density. This worked for me:

bash

ppi=$(adb wait-for-device shell getprop ro.sf.lcd_density | tr -d '\r')
density="N/A"
case $ppi in
    120)
        density="ldpi" ;;
    160)
        density="mdpi" ;;
    240)
        density="hdpi" ;;
    480)
        density="xhdpi" ;;
    320)
        density="xxhdpi" ;;
    640)
        density="xxxhdpi" ;;
esac

echo $density

Updated code using -le (less than or equal to):

bash

get_ppi() {
    adb wait-for-device shell getprop ro.sf.lcd_density | tr -d '\r'
}

get_density() {
    _ppi=$1
    if [ $_ppi -le 120 ]; then
        echo "ldpi"
    elif [ $_ppi -le 160 ]; then
        echo "mdpi"
    elif [ $_ppi -le 240 ]; then
        echo "hdpi"
    elif [ $_ppi -le 480 ]; then
        echo "xhdpi"
    elif [ $_ppi -le 320 ]; then
        echo "xxhdpi"
    elif [ $_ppi -le 640 ]; then
        echo "xxxhdpi"
    else
        echo "N/A"
    fi
}

ppi=$(get_ppi)
density=$(get_density $ppi)

echo $ppi
echo $density

Output on my device:

bash

480
xhdpi