AndroidSoftKeyboardHelper.as

package com.sf.util {
import com.distriqt.extension.application.Application;

import flash.events.TimerEvent;
import flash.system.Capabilities;
import flash.utils.Timer;

public class AndroidSoftKeyboardHelper {

    public static var SoftKeyboardHeight:int;

    private static var _callBack:Function;

    public static function get isNeeded():Boolean {
        var os:String = Capabilities.manufacturer.toLowerCase();
        if (os.search("android") > -1) {
            return true;
        }
        return false;
    }

    public static function get hasValidRecordedKeyboardHeight():Boolean {
        if (SoftKeyboardHeight > 0) {
            return true;
        }
        return false;
    }

    // here we check if we have already the softkeyboard height.
    // if not we start the timer to get the correct height when the
    // SoftKeyboard is fully appeared
    public static function onSoftKeyboardInitialized(callback:Function):void {
        _callBack = callback;

        if (hasValidRecordedKeyboardHeight) {
            callCallBack();
        } else {
            startInitializeSoftKeyboard();
        }

    }

    private static function startInitializeSoftKeyboard():void {
        var timer:Timer = new Timer(100, 1);
        timer.addEventListener(TimerEvent.TIMER_COMPLETE, onRefreshTimerComplete);
        timer.start();
    }

    // Here we check if the sofkeyboard height is already bigger than 0
    // if not we start the timer again till we get the correct height
    private static function onRefreshTimerComplete(e:TimerEvent):void {
        if (e.target != null) {
            var timer:Timer = e.target as Timer;
            timer.removeEventListener(TimerEvent.TIMER, onRefreshTimerComplete);
            timer = null;
        }

        if (Application.isSupported) {
            SoftKeyboardHeight = Application.service.keyboard.height;
        }

        if (hasValidRecordedKeyboardHeight) {
            callCallBack();
        } else {
            startInitializeSoftKeyboard();
        }
    }

    private static function callCallBack():void {
        if (_callBack != null) {
            _callBack();
        }
        _callBack = null;
    }
}
}