Bash script to kill all running Android emulators

stop-emulators.sh

#!/bin/bash
for ((PORT=5554; PORT<=5584; PORT+=2)); do
    echo killing emulator-$PORT...
    adb -s emulator-$PORT emu kill
done

Should append " || true" to the kill command so it doesn't return errors for non-running emulators...

Nowadays we can retrieve a list of all emulators with corresponding ports and kill emulators that actually exists

adb devices | grep "emulator-" | while read -r line ; do
    suffix="	device"
    emulatorInstanceName=${line%${suffix}}

    echo "Killing $emulatorInstanceName"
    adb -s ${emulatorInstanceName} emu kill
done

This gist was super helpful to me in some CI scripting. Wanted to point out for future spelunkers that the loop above can use the ability of read to assign multiple variables to eliminate the munging of emulatorInstanceName like so:

adb devices | grep "emulator-" | while read -r emulator device; do
  adb -s $emulator emu kill
done

Another take:

#!/bin/bash
devices=`adb devices`

for device in $devices; do
    if [[ "$device" =~ "emulator-" ]]; then
      adb -s $device emu kill
      echo $device removed
    fi    
done    
echo "All Done."