android中监听Bean实体类字段更新

在项目中想要监听某个Bean实体类的字段更新后需要处理相关逻辑，可以使用如下方法

data class AABean(
    var carName:String = "",
    var carType:Int = 0,
) {
    private val propertyChangeSupport = PropertyChangeSupport(this)

    var carLight: Int = 60
        set(value) {
            val oldValue = field
            field = value
            propertyChangeSupport.firePropertyChange("carLight", oldValue, value)
        }

    var carMode: Int = 0
        set(value) {
            val oldValue = field
            field = value
            propertyChangeSupport.firePropertyChange("carMode", oldValue, value)
        }

    fun addPropertyChangeListener(listener: PropertyChangeListener) {
        propertyChangeSupport.addPropertyChangeListener(listener)
    }

    fun removePropertyChangeListener(listener: PropertyChangeListener) {
        propertyChangeSupport.removePropertyChangeListener(listener)
    }
}

需要监听时先add
 MyApplication.bean.addPropertyChangeListener(propertyChangeListener)

 private val propertyChangeListener = PropertyChangeListener { evt ->
        if (evt.propertyName == "carLight") {
            int value = evt.newValue as Int
        }
        if (evt.propertyName == "carMode") {
            int value = evt.newValue as Int
        }
    }
需要销毁时使用
MyApplication.bean.removePropertyChangeListener(propertyChangeListener)