使用 jetpack compose 从服务创建视图答案

【问题标题】：Create a view from a service with jetpack compose使用 jetpack compose 从服务创建视图
【发布时间】：2022-09-25 06:53:29
【问题描述】：

每当我们需要来自服务的视图时，我们使用以下

val windowManager = getSystemService(WINDOW_SERVICE) as WindowManager

val inflater = getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater

val v = inflater.inflate(R.layout.mylayout,null) as view

windowManager.addView(v,params)

如果这次使用 @Composable 而不是布局，如何获得相同的结果？

标签： android kotlin android-jetpack-compose android-jetpack

【解决方案1】：

我使用以下内容在服务中使用 compose，它适用于普通服务和输入服务。它只是复制 ComponentActivity 中的内容。

class TranslationOverlayServiceddd : Service(), LifecycleOwner, ViewModelStoreOwner,
  SavedStateRegistryOwner {
  private val mSavedStateRegistryController = SavedStateRegistryController.create(this)
  private var windowManager: WindowManager? = null
  private var serviceView: View? = null

  override fun onBind(intent: Intent?): IBinder? {
    return null
  }

  private fun addOverlayView() {
    serviceView = TranslationPopupView(this)
    windowManager!!.addView(serviceView, null)
    serviceView?.let { decorView ->
      ViewTreeLifecycleOwner.set(decorView, this)
      ViewTreeViewModelStoreOwner.set(decorView, this)
      decorView.setViewTreeSavedStateRegistryOwner(this)
    }
    serviceView?.let {
      ViewTreeLifecycleOwner.set(it, this)
      ViewTreeViewModelStoreOwner.set(it, this)
      it.setViewTreeSavedStateRegistryOwner(this)
    }
  }

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

  private val mLifecycleRegistry = LifecycleRegistry(this)
  override fun getLifecycle(): Lifecycle = mLifecycleRegistry

  private val store = ViewModelStore()
  override fun getViewModelStore(): ViewModelStore = store

  private fun handleLifecycleEvent(event: Lifecycle.Event) =
    mLifecycleRegistry.handleLifecycleEvent(event)

  override fun onCreate() {
    super.onCreate()
    mSavedStateRegistryController.performRestore(null)
    handleLifecycleEvent(Lifecycle.Event.ON_RESUME)
    windowManager = getSystemService(Context.WINDOW_SERVICE) as WindowManager
    addOverlayView()
  }

  override fun onDestroy() {
    super.onDestroy()
    handleLifecycleEvent(Lifecycle.Event.ON_DESTROY)
    if (serviceView != null) {
      windowManager!!.removeView(serviceView)
      serviceView = null
    }
  }
}

【讨论】：