光刻LithingChangedEvent始终被触发

Question

光刻FocusChangedEvent一直被触发

我正在尝试编写一个Android TV演示，将FocusChangedEvent添加到ListItemSpec来更改项目状态。该演示非常简单，只需将ClickEvent从barbones（demo）更改即可。并发现hasFocus处于RecyclerCollectionComponent状态的项目一直在不断enter code here ging。我发现列表中的第一项一直失去关注并重新获得关注。和电视遥控装置难以滑动列表。我检查了dispatchKeyEvent的keyevent是否出现，但是什么也没有。

@OnCreateLayout
fun onCreateLayout(
        c: ComponentContext,
        @Prop color: Int,
        @Prop title: String,
        @Prop subtitle: String,
        @State isFocus: Boolean
): Component = Column.create(c)
        .paddingDip(ALL, 16f)
        .focusable(true)
        .clickHandler(ListItem.onFocusChanged(c))
        .backgroundColor(if (isFocus) Color.GRAY else Color.WHITE)
        .child(
                Text.create(c)
                        .text(title)
                        .textSizeSp(40f))
        .child(
                Text.create(c)
                        .text(subtitle)
                        .textSizeSp(20f))
        .build()

@OnUpdateState
fun bgColorChange(isFocus: StateValue<Boolean>) {
    isFocus.set(!isFocus.get()!!)
}

@OnEvent(FocusChangedEvent::class)
fun onFocusChanged(c: ComponentContext, @FromEvent hasFocus:Boolean) {
    logd("onFocusChanged","$hasFocus")
    ListItem.bgColorChange(c)
}




2019-06-24 11:35:41.626 19560-19560/com.demo.lithodemo D/onFocusChanged: true
2019-06-24 11:35:41.659 19560-19560/com.demo.lithodemo D/onFocusChanged: true
2019-06-24 11:35:41.662 19560-19560/com.demo.lithodemo D/onFocusChanged: false
2019-06-24 11:35:41.664 19560-19560/com.demo.lithodemo D/onFocusChanged: true
2019-06-24 11:35:41.697 19560-19560/com.demo.lithodemo D/onFocusChanged: true
2019-06-24 11:35:41.700 19560-19560/com.demo.lithodemo D/onFocusChanged: false
2019-06-24 11:35:41.705 19560-19560/com.demo.lithodemo D/onFocusChanged: true
2019-06-24 11:35:41.742 19560-19560/com.demo.lithodemo D/onFocusChanged: true
2019-06-24 11:35:41.744 19560-19560/com.demo.lithodemo D/onFocusChanged: false