Android Compose 悬浮窗

今天需要写一个悬浮窗，但是在 Compose 中显示悬浮窗会遇到生命周期问题，我搜了一下，竟然有博主还要付费才给看，我真的是，开源社会不过是闻道有先后 ，大家互帮互助才有未来，这样明目张胆的放几张收款码让付款才给看几行代码，至于吗？吃相如此难看！看看源码还是可以翻出来的，这里免费给大家分享，开源万岁！我的文章不要求关注，不要求付费，不要求会员，只求一个点赞认可，感谢各位。

今天遇到的问题是两个报错，相信大家主要难以解决的也是这两个问题：

kotlin 复制代码

ViewTreeLifecycleOwner not found from androidx.compose.ui.platform.ComposeView

kotlin 复制代码

Composed into the View which doesn't propagateViewTreeSavedStateRegistryOwner!

解决办法：

groovy 复制代码

implementation("androidx.lifecycle:lifecycle-service:2.5.1")

kotlin 复制代码

import android.graphics.PixelFormat
import android.view.WindowManager
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.ComposeView
import androidx.lifecycle.LifecycleService
import androidx.lifecycle.setViewTreeLifecycleOwner
import androidx.savedstate.SavedStateRegistry
import androidx.savedstate.SavedStateRegistryController
import androidx.savedstate.SavedStateRegistryOwner
import androidx.savedstate.setViewTreeSavedStateRegistryOwner
import com.puremic.karaoke.global.tuning.TuningItemNotifier
import com.puremic.karaoke.ui.theme.PuremicKaraokeTheme

class NotifierService: LifecycleService(), SavedStateRegistryOwner {
    private val savedStateRegistryController by lazy {
        SavedStateRegistryController.create(this)
    }

    override val savedStateRegistry: SavedStateRegistry
        get() = savedStateRegistryController.savedStateRegistry

    override fun onCreate() {
        super.onCreate()
        savedStateRegistryController.performAttach()
        savedStateRegistryController.performRestore(null)

        val windowManager = getSystemService(WindowManager::class.java)
        val params = WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT
        )

        val composeView = ComposeView(this).apply {
            setViewTreeLifecycleOwner(this@NotifierService)
            setViewTreeSavedStateRegistryOwner(this@NotifierService)
            setContent {
                PuremicKaraokeTheme {
                    Notifier()
                }
            }
        }
        windowManager.addView(composeView, params)
    }

    @Composable
    private fun Notifier() {
        Box(
            modifier = Modifier.fillMaxSize()
        ) {
            TuningItemNotifier()
        }
    }
}

解决问题的无非就是那三四行代码，祝大家学业有成，步步高升