问InputMethodService与Jetpack组合- ComposeView原因:组合到不传播ViewTreeLifecycleOwner的视图中

EN

class IMEService : InputMethodService(), LifecycleOwner, ViewModelStoreOwner,
    SavedStateRegistryOwner {

    override fun onCreateInputView(): View {
        val view = ComposeKeyboardView(this)
        ViewTreeLifecycleOwner.set(view, this)
        ViewTreeViewModelStoreOwner.set(view, this)
        ViewTreeSavedStateRegistryOwner.set(view, this)
        return view
    }


    //Lifecylce Methods

    private var lifecycleRegistry: LifecycleRegistry = LifecycleRegistry(this)

    override fun getLifecycle(): Lifecycle {
        return lifecycleRegistry
    }


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

    override fun onCreate() {
        super.onCreate()
        savedStateRegistry.performRestore(null)
        handleLifecycleEvent(Lifecycle.Event.ON_CREATE)
    }



    override fun onDestroy() {
        super.onDestroy()
        handleLifecycleEvent(Lifecycle.Event.ON_DESTROY)
    }


    //ViewModelStore Methods
    private val store = ViewModelStore()

    override fun getViewModelStore(): ViewModelStore = store

    //SaveStateRegestry Methods

    private val savedStateRegistry = SavedStateRegistryController.create(this)

    override fun getSavedStateRegistry(): SavedStateRegistry = savedStateRegistry.savedStateRegistry
}

class KeyboardViewLifecycleOwner : 
LifecycleOwner, ViewModelStoreOwner, SavedStateRegistryOwner {

    fun onCreate() {
        savedStateRegistryController.performRestore(null)
        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE)
    }

    fun onResume() {
        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_RESUME)
    }

    fun onPause() {
        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_PAUSE)
    }

    fun onDestroy() {
        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY)
        store.clear()
    }
    
    /**
      Compose uses the Window's decor view to locate the
      Lifecycle/ViewModel/SavedStateRegistry owners. 
      Therefore, we need to set this class as the "owner" for the decor view.
    */
    fun attachToDecorView(decorView: View?) {
        if (decorView == null) return

        ViewTreeLifecycleOwner.set(decorView, this)
        ViewTreeViewModelStoreOwner.set(decorView, this)
        ViewTreeSavedStateRegistryOwner.set(decorView, this)
    }
    
    // LifecycleOwner methods
    private val lifecycleRegistry: LifecycleRegistry = LifecycleRegistry(this)
    override fun getLifecycle(): Lifecycle = lifecycleRegistry

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

    // SavedStateRegistry methods
    private val savedStateRegistryController = SavedStateRegistryController.create(this)
    override fun getSavedStateRegistry(): SavedStateRegistry =
        savedStateRegistryController.savedStateRegistry
}

class MyKeyboardService : InputMethodService() {
    private val keyboardViewLifecycleOwner = KeyboardViewLifecycleOwner()

    override fun onCreate() {
        super.onCreate()
        keyboardViewLifecycleOwner.onCreate()
    }

    override fun onCreateInputView(): View {
        //Compose uses the decor view to locate the "owner" instances
        keyboardViewLifecycleOwner.attachToDecorView(
            window?.window?.decorView
        )

        return MyComposeView(this)
    }

    override fun onStartInputView(info: EditorInfo?, restarting: Boolean) {
        keyboardViewLifecycleOwner.onResume()
    }

    override fun onFinishInputView(finishingInput: Boolean) {
        keyboardViewLifecycleOwner.onPause()
    }

    override fun onDestroy() {
        super.onDestroy()
        keyboardViewLifecycleOwner.onDestroy()
    }
}

@file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")

package io.simsim.demo.fetal

import android.app.Service
import android.content.Intent
import android.os.IBinder
import androidx.annotation.CallSuper
import androidx.lifecycle.*
import androidx.savedstate.SavedStateRegistry
import androidx.savedstate.SavedStateRegistryController
import androidx.savedstate.SavedStateRegistryOwner

abstract class BaseService :
    Service(),
    LifecycleOwner,
    ViewModelStoreOwner,
    SavedStateRegistryOwner {
    private val _lifecycleRegistry: LifecycleRegistry by lazy { LifecycleRegistry(this) }
    private val _store by lazy { ViewModelStore() }


    override fun getLifecycle(): Lifecycle = _lifecycleRegistry

    override fun getViewModelStore(): ViewModelStore = _store

    override val savedStateRegistry: SavedStateRegistry = SavedStateRegistryController.create(this).savedStateRegistry

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

    @CallSuper
    override fun onCreate() {
        super.onCreate()
        // You must call performAttach() before calling performRestore(Bundle)
        savedStateRegistry.performAttach(lifecycle)
        savedStateRegistry.performRestore(null)
        handleLifecycleEvent(Lifecycle.Event.ON_CREATE)
    }

    @CallSuper
    override fun onTaskRemoved(rootIntent: Intent?) {
        super.onTaskRemoved(rootIntent)
        stopSelf()
    }

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

    @CallSuper
    override fun onDestroy() {
        super.onDestroy()
        handleLifecycleEvent(Lifecycle.Event.ON_DESTROY)
    }
}

ComposeView(this).also {
    it.setContent(content)
    ViewTreeLifecycleOwner.set(it, this)
    ViewTreeViewModelStoreOwner.set(it, this)
    it.setViewTreeSavedStateRegistryOwner(this)
}