如何解决Jetpack Compose Button onClick事件内存泄漏问题？

问题背景 #

最初遇到Jetpack Compose按钮点击动作泄漏的问题，首先定义了承载字符串、颜色、按钮点击动作等资源的类：

data class CameraOnBoardingComposeViewResources(val title: String, val buttonTitle: String, val buttonAction: () -> Unit)

该数据类在Fragment中创建方式如下：

val resources = CameraOnBoardingComposeViewResources(
    "Title", "ButtonTitle"
) { navigate() }

随后在Composable函数中按如下方式使用这些资源：

@Composable
fun composeOnBoardingView(resources: CameraOnBoardingComposeViewResources) {
    Surface(
        shape = RoundedCornerShape(4.dp),
        color = colorResource(R.color.idenfyMainColorV2),
        modifier = Modifier
            .height(42.dp)
            .padding(start = 16.dp, end = 16.dp)
            .clickable(onClick = resources.buttonAction)
            .fillMaxWidth()
    )
}

最初怀疑是buttonAction导致内存泄漏，询问需要主动释放还是调整现有架构。

问题实际定位 #

收到CommonsWare回复后进一步排查，定位到问题实际出自composeOnBoardingView组合函数内部的定时任务代码：

val currentInstructionDescription: MutableState<String> = remember {
   mutableStateOf("")
}

val progress = remember { mutableStateOf(0.0f) }

val handler = Handler(Looper.getMainLooper())
exoPlayer?.apply {
    val runnable = object : Runnable {
        override fun run() {
            progress.value =
                exoPlayer.currentPosition.toFloat() / exoPlayer.duration.toFloat()
            currentInstructionDescription.value = InstructionsDescriptionBuilder.build(
                context,
                (resources.documentCenterImageUiViewModel as OnBoardingCenterImageUIViewModel.DocumentResource).step,
                exoPlayer.currentPosition.toInt() / 1000
            )
            handler.postDelayed(this, 1000)
        }
    }
    handler.post(runnable)
}

尝试的无效修复方案 #

最初尝试通过DisposableEffect在组合销毁时释放handler回调，但问题没有解决：

val lifecycleOwner: LifecycleOwner = LocalLifecycleOwner.current

DisposableEffect(lifecycleOwner) {
    onDispose {
        handler.removeCallbacksAndMessages(null)
    }
}

最终解决方案 #

弃用Handler，改用Jetpack Compose原生的LaunchedEffect结合协程实现组合内的每秒定时任务，泄漏问题彻底解决。

内容的提问来源于stack exchange，提问作者Viktor Vostrikov