compose 保持屏幕常亮的工具类

利用view的 keepScreenOn属性，通过监听compose的resume和pause来给视图添加常亮

@Composable
fun KeepScreenOn() {

    val lifecycleOwner = LocalLifecycleOwner.current
    val view = LocalView.current
    DisposableEffect(Unit) {
        val observer = LifecycleEventObserver { _, event ->
            when (event) {
                Lifecycle.Event.ON_RESUME -> {
                    // 回到前台，保持屏幕常亮
                    LogUtils.d("KeepScreenOn ON_RESUME ")
                    view.keepScreenOn = true
                }
                Lifecycle.Event.ON_PAUSE -> {
                    // 跳到后台或切到其他应用，取消保持常亮
                    LogUtils.d("KeepScreenOn ON_PAUSE ")
                    view.keepScreenOn = false
                }
                else -> Unit
            }
        }
        lifecycleOwner.lifecycle.addObserver(observer)
        onDispose {
            lifecycleOwner.lifecycle.removeObserver(observer)
            LogUtils.d("KeepScreenOn onDispose ")
            view.keepScreenOn = false
        }
    }
}

在需要常亮的地方通过

KeepScreenOn()

就可以添加界面常亮了