Run only first device in android emulator.

run_first_android_device.sh

#! /bin/bash
# only run first android emulator/
# ref. http://stackoverflow.com/questions/7837952/what-is-the-command-to-list-the-available-avdnames

# Check if the emulator command exists first
if ! type emulator > /dev/null; then
  echo "emulator command not found"
  exit 1
fi

# Gather emulators that exist on this computer
DEVICES=( $(emulator -list-avds 2>&1 ) )

# Run first device.
emulator @${DEVICES[0]}