Automate key input to Android applications and system utilities using input command on any Android device via adb

adb-sendkey

#!/bin/bash
pnam=$(basename "$0")
usage="$pnam [-b] [-n] [-v] KeySequence
$pnam {-h|--help}
"

adb_shell_input_keyevent() {
  $verbose && echo "adb shell input keyevent $1"
  $dryrun || adb shell -n input keyevent $1
}

adb_sendkey() {
  if $buffered; then
    $verbose && echo "buffering $1"
    buffer="$buffer $1"
  else
    adb_shell_input_keyevent $1
  fi
}

buffer=''
buffered=false
dryrun=false
verbose=false
while true; do
  case "$1" in
  -b) buffered=true; shift;;
  -h|--help) echo "$usage"; exit 0;;
  -n) dryrun=true; verbose=true; shift;;
  -v) verbose=true; shift;;
  -*) echo "$pnam: $1: unknown option.">&2; shift; exit 1;;
  *) break;;
  esac
done

test $# -eq 0 && { echo "$usage"; exit 0; }

while read -N 1 cc; do
  test -z $cc && break
  case $cc in
  [0-9]) adb_sendkey $(($cc+7));;
  [a-z]) adb_sendkey $(($(echo -n B|od -An -d)-68));;
  [A-Z]) adb_sendkey 59
         adb_sendkey $(($(echo -n B|od -An -d)-36));;
  \<)
    read -d \> token || {
      echo "$pnam: broken key symbol; it must be surrounded with < and >.">&2
      exit 2
    }
    case "${token,,}" in
    xmenu) adb_sendkey 1;;
    soft_right) adb_sendkey 2;;
    home) adb_sendkey 3;;
    back) adb_sendkey 4;;
    call) adb_sendkey 5;;
    endcall) adb_sendkey 6;;
    dpad_up) adb_sendkey 19;;
    dpad_down) adb_sendkey 20;;
    dpad_left) adb_sendkey 21;;
    dpad_right) adb_sendkey 22;;
    dpad_center) adb_sendkey 23;;
    volume_up) adb_sendkey 24;;
    volume_down) adb_sendkey 25;;
    power) adb_sendkey 26;;
    camera) adb_sendkey 27;;
    clear) adb_sendkey 28;;
    alt_left) adb_sendkey 57;;
    alt_right) adb_sendkey 58;;
    shift_left) adb_sendkey 59;;
    shift_right) adb_sendkey 60;;
    tab) adb_sendkey 61;;
    space) adb_sendkey 62;;
    sym) adb_sendkey 63;;
    explorer) adb_sendkey 64;;
    envelope) adb_sendkey 65;;
    enter) adb_sendkey 66;;
    del) adb_sendkey 67;;
    num|numlock) adb_sendkey 78;;
    headsethook) adb_sendkey 79;;
    focus) adb_sendkey 80;;
    menu) adb_sendkey 82;;
    notification) adb_sendkey 83;;
    search) adb_sendkey 84;;
    star) adb_sendkey 17;;
    pound) adb_sendkey 18;;
    comma) adb_sendkey 55;;
    period) adb_sendkey 56;;
    grave) adb_sendkey 68;;
    minus) adb_sendkey 69;;
    equals) adb_sendkey 70;;
    left_bracket) adb_sendkey 71;;
    right_bracket) adb_sendkey 72;;
    backslash) adb_sendkey 73;;
    semicoron) adb_sendkey 74;;
    apostrophe) adb_sendkey 75;;
    slash) adb_sendkey 76;;
    at) adb_sendkey 77;;
    plus) adb_sendkey 81;;
    *) echo "$pnam: <${token,,}>: unknown key symbol.">&2; exit 4;;
    esac;;
  \*) adb_sendkey 17;;
  \#) adb_sendkey 18;;
  ,) adb_sendkey 55;;
  .) adb_sendkey 56;;
  \ ) adb_sendkey 62;;
  \`) adb_sendkey 68;;
  -) adb_sendkey 69;;
  =) adb_sendkey 70;;
  \[) adb_sendkey 71;;
  \]) adb_sendkey 72;;
  \\) adb_sendkey 73;;
  \;) adb_sendkey 74;;
  \') adb_sendkey 75;;
  /) adb_sendkey 76;;
  @) adb_sendkey 77;;
  +) adb_sendkey 81;;
  *) echo "$pnam: '$cc': unknown key char.">&2; exit 3;;
  esac
done <<EOS
$*
EOS

$buffered && {
  for cc in $buffer; do
    adb_shell_input_keyevent $cc
  done
}