从 DecorView@2da7146[MyActivity] 中找不到 ViewTreeLifecycleOwner

Question

从撰写更新alpha-11到alpha-12（或beta-01）后，每当我打开具有撰写视图的活动或片段时，我都会遇到此崩溃。

我正在使用AppCompatActivitywhich implements LifecycleOwner，所以这非常奇怪。

    java.lang.IllegalStateException: ViewTreeLifecycleOwner not found from DecorView@2da7146[MyActivity]
            at androidx.compose.ui.platform.WindowRecomposer_androidKt.createLifecycleAwareViewTreeRecomposer(WindowRecomposer.android.kt:214)
            at androidx.compose.ui.platform.WindowRecomposer_androidKt.access$createLifecycleAwareViewTreeRecomposer(WindowRecomposer.android.kt:1)
            at androidx.compose.ui.platform.WindowRecomposerFactory$Companion$LifecycleAware$1.createRecomposer(WindowRecomposer.android.kt:98)
            at androidx.compose.ui.platform.WindowRecomposerPolicy.createAndInstallWindowRecomposer$ui_release(WindowRecomposer.android.kt:151)
            at androidx.compose.ui.platform.WindowRecomposer_androidKt.getWindowRecomposer(WindowRecomposer.android.kt:199)
            at androidx.compose.ui.platform.AbstractComposeView.ensureCompositionCreated(ComposeView.android.kt:176)
            at androidx.compose.ui.platform.AbstractComposeView.onAttachedToWindow(ComposeView.android.kt:207)
            at android.view.View.dispatchAttachedToWindow(View.java:20014)
            at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3589)
            at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3596)
            at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3596)
            at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3596)
            at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3596)
            at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3596)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2223)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1888)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8511)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
            at android.view.Choreographer.doCallbacks(Choreographer.java:761)
            at android.view.Choreographer.doFrame(Choreographer.java:696)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
            at android.os.Handler.handleCallback(Handler.java:873)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:214)
            at android.app.ActivityThread.main(ActivityThread.java:7050)
            at java.lang.reflect.Method.invoke(Native Method)
            at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)

我的代码看起来很简单：

    class MyActivity : AppCompatActivity() {
    
        override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
    
            setContent {
                MaterialTheme {
                    Text(text = "compose")
                }
            }
        }
    }

更新

显然你需要使用 androidx.appcompat:appcompat:1.3.0-beta01

Answer 1

尝试更新AppCompat对rc01版本的依赖。这为我解决了这个问题。

implementation 'androidx.appcompat:appcompat:1.3.0-rc01'

Answer 2

如果你的视图是旧的，在我的例子中它是对话框，你可以尝试添加这样的行来手动设置视图树所有者

val decorView: View = dialog?.window?.decorView ?: throw IllegalStateException("Failed to get decorview")
        ViewTreeLifecycleOwner.set(decorView, this)
        ViewTreeViewModelStoreOwner.set(decorView, this)
        view.setViewTreeSavedStateRegistryOwner(decorView.findViewTreeSavedStateRegistryOwner())

以这种方式 DialogFragment 被修复在这里：

https://android-review.googlesource.com/c/platform/frameworks/support/+/1610494/1/fragment/fragment/src/main/java/androidx/fragment/app/DialogFragment.java#48

Answer 3

由于没有一个解决方案对我有用，我来这里是为了让您的一天更轻松（假设您拥有我为我的项目所做的配置）。

因此，这是升级到后未启动的活动beta01：

class AuthenticationActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        supportFragmentManager.beginTransaction()
            .replace(android.R.id.content, SignInFragment())
            .commit()
    }
}

setContentView(...)正如你所看到的，这里没有。分析堆栈跟踪后，我发现该操作setTag(R.id.view_tree_lifecycle_owner, lifecycleOwner)未执行，导致getTag()返回 null - 因此出现异常。

事实证明，当执行setTag(...)任何重载时就会被调用。setContentView()

因此，我的设置的简单修复方法是引入一个冗余setContentView(View(this))，在内部设置生命周期所有者：

class AuthenticationActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(View(this)) // <-- here's the newly introduced line
        supportFragmentManager.beginTransaction()
            .replace(android.R.id.content, SignInFragment())
            .commit()
    }
}