如何防止softKeyboard在adobe air的全屏横屏模式下隐藏textField？

import flash.display.Stage;
import flash.ui.Keyboard;
import flash.events.KeyboardEvent;

var textField:TextField = new TextField();
textField.type = TextFieldType.INPUT;
textField.multiline = true;
textField.wordWrap = true;
textField.width = stage.stageWidth;
textField.height = stage.stageHeight;
addChild(textField);

stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyboardDown);
stage.addEventListener(KeyboardEvent.KEY_UP, onKeyboardUp);

function onKeyboardDown(event:KeyboardEvent):void {
    if (event.keyCode == Keyboard.BACK) {
        event.preventDefault(); // 阻止默认的返回键行为
    }
}

function onKeyboardUp(event:KeyboardEvent):void {
    if (event.keyCode == Keyboard.BACK) {
        // 处理返回键事件
    }
}

stage.addEventListener(SoftKeyboardEvent.SOFT_KEYBOARD_ACTIVATE, onSoftKeyboardActivate);
stage.addEventListener(SoftKeyboardEvent.SOFT_KEYBOARD_DEACTIVATE, onSoftKeyboardDeactivate);

function onSoftKeyboardActivate(event:SoftKeyboardEvent):void {
    // 文本字段滚动到可见区域，例如将textField的y坐标向上移动软键盘的高度
    textField.y -= event.softKeyboardRect.height;
}

function onSoftKeyboardDeactivate(event:SoftKeyboardEvent):void {
    // 恢复文本字段的位置，将textField的y坐标还原
    textField.y += event.softKeyboardRect.height;
}