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I’m trying to figure out why I keep getting an err...
# compose
l
I’m trying to figure out why I keep getting an error when trying to add compose to my project. Haven’t been able to find an answer from searching online, so maybe y’all can help me. I’ll post the stack trace in thread
java.lang.IllegalStateException: ViewTreeLifecycleOwner not found from androidx.coordinatorlayout.widget.CoordinatorLayout{96763ee V.E...... ......I. 0,0-0,0} at androidx.compose.ui.platform.WindowRecomposer_androidKt.createLifecycleAwareViewTreeRecomposer(WindowRecomposer.android.kt:242) 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:153) at androidx.compose.ui.platform.WindowRecomposer_androidKt.getWindowRecomposer(WindowRecomposer.android.kt:228) at androidx.compose.ui.platform.AbstractComposeView.ensureCompositionCreated(ComposeView.android.kt:200) at androidx.compose.ui.platform.AbstractComposeView.onAttachedToWindow(ComposeView.android.kt:235) at android.view.View.dispatchAttachedToWindow(View.java:22010) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4291) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:4298) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3087) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2575) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:9910) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1010) at android.view.Choreographer.doCallbacks(Choreographer.java:809) at android.view.Choreographer.doFrame(Choreographer.java:744) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:995) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:246) at android.app.ActivityThread.main(ActivityThread.java:8512) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
I’m thinking is because of some dependency, but not sure which one and nothing I’ve tried has solved it
also I’m trying to add a simple composable to an existing screen with a 
ComposeView
in the xml
i
If you're using 
AppCompatActivity
, make sure you're using AppCompat 
1.3.0-rc01
- only the 1.3 versions set the 
ViewTreeLifecycleOwner
that 
ComposeView
requires
l
thanks! I’ll try that. Is this documented anywhere? I haven’t been able to find which dependencies work with compose, so I’ve been a little lost
l
Compose should throw an exception telling you to use 1.3+, so I’m curious what code path triggers this - how are you adding 
ComposeView
/ how are you calling 
setContent
on it?
i
(Are you calling 
setContent
on your 
ComposeView
at all?)
l
The 
ComposeView
I’m just adding in the xml, and then in 
Fragment
I’m calling the 
setContent
which passing in my composable function
Copy code
<androidx.compose.ui.platform.ComposeView
            android:id="@+id/user_section_header"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
Copy code
updateInfoComposeView.setContent {
            UserInfoSection()
        }
this is an older screen so just want to move a single section that displays some user info. I’m not even passing in any data and I’m just hardcoding everything in the composable until I get something to show up on the screen
l
Where in your 
Fragment
are you calling 
setContent
?
l
in 
onViewCreated
i
Then yeah, unless this was the very first fragment in your app, your 
ComposeView
will have gone through 
onAttachedToWindow
by that point
l
btw I was using an older version of appcompat, I never got any errors telling me that I was in the wrong version though. Updated and will let you know if that worked
i
If you're in a Fragment, you'll need to upgrade your Fragment version to 1.3.X
(for the same reason)
l
yeah that one I’m on 1.3.3, I missed the appcompat one
i
I wonder if 
ComposeView
could avoid throwing in 
onAttachedToWindow
and instead wait for you call 
setContent
for the first time? Then you'd get the good error message
l
Unless I’m missing something, 
ComposeView
shouldn’t create anything until is 
setContent
is called, no? Only 
AbstractComposeView
allows for extra choices in terms of when to set up the composition
l
updating the appcompat version worked! thanks!
Is there a place where which dependencies work with compose is documented?
i
l
gotcha. Not sure why I wasn’t getting that error though
l
If you have a small reproducible sample, it would be helpful if you could file a bug, since this is a very confusing crash when you don’t see this error message 🙂
l
not sure if I can come up with a reproducible sample, but I can compile a list of our apps dependencies (some of which are very old) and try to do something with that
either way, updating appcompat worked. I appreciate all the help!
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