Keycode is always zero in Chrome for Android

below solution also work for me. might be useful for others also.

var getKeyCode = function (str) {
    return str.charCodeAt(str.length - 1);
}

document.getElementById("a").onkeyup = function (e) {
    var kCd = e.keyCode || e.which;
    if (kCd == 0 || kCd == 229) { //for android chrome keycode fix
        kCd = getKeyCode(this.value);
    }
    alert(kCd)
}