AndroidWindowManagerComposeView_1">在Android的WindowManager中添加ComposeView的流程及注意事项

流程

总体跟普通的View一样设置窗口参数再用addView添加到WIndowManager中

private val wm by lazy { MobilePlatformPlugin.applicationContext.getSystemService(WINDOW_SERVICE) as WindowManager }fun showPopWindow(context: Context) {val params = WindowManager.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT, // 宽度WindowManager.LayoutParams.MATCH_PARENT, // 高度WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY, // 窗口类型 TODO: //API LevelWindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, // 窗口标志PixelFormat.TRANSLUCENT // 像素格式)composeView = ComposeView(context = context).apply {setContent {PopWindowView()}}lifecycleOwner = MyComposeViewLifecycleOwner().also {it.onCreate() // 注意it.attachToDecorView(composeView)}wm.addView(composeView, params)lifecycleOwner?.onStart()lifecycleOwner?.onResume()}

不过ComposeView需要有LifeCycleOwner的支持，不然运行会崩溃，所以需要自定义一个LifeCycleOwner，完全照抄下面这个即可，这里我也是抄的哈哈

    private class MyComposeViewLifecycleOwner : LifecycleOwner, ViewModelStoreOwner,SavedStateRegistryOwner {private val lifecycleRegistry: LifecycleRegistry = LifecycleRegistry(this)private val savedStateRegistryController = SavedStateRegistryController.create(this)private val store = ViewModelStore()override val lifecycle: Lifecycleget() = lifecycleRegistryoverride val savedStateRegistry: SavedStateRegistryget() = savedStateRegistryController.savedStateRegistryoverride val viewModelStore: ViewModelStoreget() = storefun onCreate() {savedStateRegistryController.performRestore(null)lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE)}fun onStart() {lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START)}fun onResume() {lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_RESUME)}fun onPause() {lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_PAUSE)}fun onStop() {lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_STOP)}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?) {decorView?.let {it.setViewTreeViewModelStoreOwner(this)it.setViewTreeLifecycleOwner(this)it.setViewTreeSavedStateRegistryOwner(this)} ?: return}}

注意事项

这里需要注意一个非常关键的点，有一些资料只执行了LifeCycleOwner的create事件，只执行create事件可能会导致Compose的状态监听失效，所以最后一定要模拟start和resume事件,一定要在addView后添加

lifecycleOwner?.onStart()
lifecycleOwner?.onResume()

这个坑有点大，研究了挺久才发现，所以放出来希望能帮助到遇到同样问题的人们。

销毁

最后关闭悬浮窗也记得执行一下pause,stop,destroy流程

    fun closePopWindow() {if (composeView?.isAttachedToWindow != true) returnwm.removeView(composeView)composeView = nulllifecycleOwner?.onPause()lifecycleOwner?.onStop()lifecycleOwner?.onDestroy()lifecycleOwner = null}