向上滑动面板（Java至Kotlin）

如何在Kotlin中显示SlidingUpPanel的面板状态

我想使用库，遵循本教程：

结果应该是这样的：

教程链接中的Java代码：

private SlidingUpPanelLayout.PanelSlideListener onSlideListener() {
    return new SlidingUpPanelLayout.PanelSlideListener() {
        @Override
        public void onPanelSlide(View view, float v) {
            textView.setText("panel is sliding");
        }

        @Override
        public void onPanelCollapsed(View view) {
            textView.setText("panel Collapse");
        }

        @Override
        public void onPanelExpanded(View view) {
            textView.setText("panel expand");
        }

        @Override
        public void onPanelAnchored(View view) {
            textView.setText("panel anchored");
        }

        @Override
        public void onPanelHidden(View view) {
            textView.setText("panel is Hidden");
        }
    };
}

从Java到Kotlin的转换代码（我将toast放在anko库中，而不是textView中）：

在Java代码中，在onCreate方法中，我有：

slidingLayout.setPanelSlideListener(onSlideListener());

这在Kotlin中似乎不起作用，因为我使用的方法是单击、拖动、悬停、按键和触摸（侦听器）

我想另一个好办法是实施

SlidingPaneLayout.PanelSlideListener

在我的课堂上，但我仍然无法让它发挥作用

---

找到面板在Kotlin中显示或隐藏的解决方案吗？

您需要加载幻灯片布局

private lateinit var slidingLayout: SlidingUpPanelLayout
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
    return inflater.inflate(R.layout.activity_main, container, false).also {
        slidingLayout = it.findViewById(R.id.sliding_Layout)
    }
}

然后你再检查一下状态

if (slidingLayout.panelState == SlidingUpPanelLayout.PanelState.HIDDEN)

您还可以定位、展开、折叠和拖动状态

如果您想在Kotlin中设置侦听器，我已经这样做了

slidingLayout.addPanelSlideListener(object : SlidingUpPanelLayout.PanelSlideListener {
        override fun onPanelSlide(panel: View?, slideOffset: Float) {
            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
        }

        override fun onPanelStateChanged(panel: View?, previousState: SlidingUpPanelLayout.PanelState?, newState: SlidingUpPanelLayout.PanelState?) {
           TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
        }
    })

---

方法没有指定“重写”，但它应该是编译时错误

slidingLayout.addPanelSlideListener(object : SlidingUpPanelLayout.PanelSlideListener {
        override fun onPanelSlide(panel: View?, slideOffset: Float) {
            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
        }

        override fun onPanelStateChanged(panel: View?, previousState: SlidingUpPanelLayout.PanelState?, newState: SlidingUpPanelLayout.PanelState?) {
           TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
        }
    })