FragmentContainerView within PreferenceDialogFragmentCompat crashes [154366601]

Fixed

Bug

Status Update

No update yet.

Description

th...@outlook.com

created issue #1

Apr 18, 2020 01:12PM

I have a PreferenceScreen with a DialogPreference that opens a PreferenceDialogFragmentCompat when there is being clicked on. The DialogPreference has a custom dialogLayoutResource in which I set a new PreferenceFragmentCompat through xml using the <FragmentContainerView/> tag. On clicking the DialogPreference, the crash posted below occurs.

This crash does not occur when commenting out <FragmentContainerView/>

I was able to workaround this issue by using the following code in PreferenceDialogFragmentCompat:

private lateinit var mView: View

override fun onCreateDialogView(context: Context?): View {
    mView = super.onCreateDialogView(context)
    return mView
}

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
): View? = mView

A sample project demonstrating the isue can be found here

java.lang.IllegalStateException: Fragment androidx.fragment.app.Fragment$4@d586457 does not have a view
    at androidx.fragment.app.Fragment$4.onFindViewById(Fragment.java:2660)
    at androidx.fragment.app.FragmentAnim.loadAnimation(FragmentAnim.java:56)
    at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1458)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1497)
    at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2625)
    at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:2577)
    at androidx.fragment.app.Fragment.performActivityCreated(Fragment.java:2722)
    at androidx.fragment.app.FragmentStateManager.activityCreated(FragmentStateManager.java:346)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1188)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1356)
    at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1434)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1497)
    at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447)
    at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2169)
    at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1992)
    at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1947)
    at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1849)
    at androidx.fragment.app.FragmentManager$4.run(FragmentManager.java:413)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6854)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:860)

Comments

ja...@google.com <ja...@google.com> Apr 20, 2020 12:34PM

Status: New

il...@google.com <il...@google.com> #2Apr 20, 2020 04:16PM

Status: Duplicate of

150051716

Project: platform/frameworks/support
Branch: androidx-main

commit 57ca221882695bd6a52549f4d9ea3b812e6fe87c
Author: Simon Schiller <simonschiller@users.noreply.github.com>
Date: Mon Mar 22 16:09:30 2021

[GH] [FragmentStrictMode] Detect <fragment> tag usage

## Proposed Changes

- Detect `<fragment>` tag usage inside XML layouts

## Testing

Test: See `FragmentStrictModeTest#detectFragmentTagUsage`

## Issues Fixed

Fixes: 153738235

This is an imported pull request from

https://github.com/androidx/androidx/pull/141.

Resolves #141
Github-Pr-Head-Sha: 4ea052596e4341b9f11bcf335e2bc38045a91f19
GitOrigin-RevId: 62e7487aa4874eef6bb556490e193717cf937251
Change-Id: Iae48578e85e4e4897f806d7ade2e2a660adf9479

M fragment/fragment/api/public_plus_experimental_current.txt
M fragment/fragment/api/restricted_current.txt
M fragment/fragment/src/androidTest/java/androidx/fragment/app/strictmode/FragmentStrictModeTest.kt
M fragment/fragment/src/main/java/androidx/fragment/app/FragmentLayoutInflaterFactory.java
M fragment/fragment/src/main/java/androidx/fragment/app/strictmode/FragmentStrictMode.java
A fragment/fragment/src/main/java/androidx/fragment/app/strictmode/FragmentTagUsageViolation.java

https://android-review.googlesource.com/1649748

th...@outlook.com <th...@outlook.com> #3Apr 20, 2020 11:06PM

I am using Preference 1.1.1 already, as demonstrated in the sample project. In fact, I also reported 150051716, the one that is marked as duplicate. That issue is indeed fixed but this is a new one. The stacktrace is different too.

il...@google.com <il...@google.com> Apr 20, 2020 11:18PM

Status: New (reopened)

il...@google.com <il...@google.com> #4Apr 21, 2020 12:23AM

Yep, you're right. Looks like the root cause of this separate issue was already fixed by aosp/1181309 so upgrading to any Fragment 1.3.0 version would pull in the fix.

That fix is part of a much larger set of changes so I don't think it'll be possible for us to safely cherry pick that fix into a Fragment 1.2.X release, unfortunately.

I'll leave this open while we investigate what that would take.

th...@outlook.com <th...@outlook.com> #5Apr 21, 2020 12:53AM

My apologies for not trying the latest alpha release beforehand. Upgrading to version 1.3.0 solves my case. Thank you for pointing that out.

th...@outlook.com <th...@outlook.com> #6Apr 21, 2020 09:43AM

When using fragment-ktx:1.3.0-alpha03, I'm still able to reproduce this issue. The following crash occurs on a configuration change:

java.lang.IllegalStateException: Fragment androidx.fragment.app.Fragment$4@5ff632e does not have a view
    at androidx.fragment.app.Fragment$4.onFindViewById(Fragment.java:2711)
    at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:464)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1170)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1316)
    at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1394)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1460)
    at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2695)
    at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:2644)
    at androidx.fragment.app.Fragment.performActivityCreated(Fragment.java:2784)
    at androidx.fragment.app.FragmentStateManager.activityCreated(FragmentStateManager.java:507)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1171)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1316)
    at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1394)
    at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1460)
    at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2695)
    at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:2644)
    at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:251)
    at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:546)
    at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:201)
    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1392)
    at android.app.Activity.performStart(Activity.java:7172)
    at android.app.ActivityThread.handleStartActivity(ActivityThread.java:2967)
    at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:180)
    at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:165)
    at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:142)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6854)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:860)

il...@google.com <il...@google.com> #7Apr 21, 2020 11:49PM

Accepted by il...@google.com.

Thanks, this looks like an issue with DialogFragment so fixing that underlying issue should fix PreferenceDialogFragmentCompat as well.

ap...@google.com <ap...@google.com> #8Apr 22, 2020 02:40PM

Project: platform/frameworks/support
Branch: androidx-master-dev

commit 3c698888435fee8af2d911e54d1b9df9fd46648c
Author: Ian Lake <ilake@google.com>
Date: Tue Apr 21 16:46:50 2020

Fix onFindViewById in DialogFragment

Instead of only considering the Fragment's view,
DialogFragment should also consider the Dialog's
view when calling onFindViewById(). This ensures
that any <fragment> or FragmentContainerView that
is created as part of the Dialog's view structure
will properly be reattached to its view hierarchy
after a configuration change.

Test: updated DialogFragmentInflatedChildTest tests pass
BUG: 154366601
Change-Id: I59ada3193974f00ab4df475d992e237baa03c5bf

M fragment/fragment/src/androidTest/java/androidx/fragment/app/DialogFragmentInflatedChildTest.kt
M fragment/fragment/src/main/java/androidx/fragment/app/DialogFragment.java
M fragment/fragment/src/main/java/androidx/fragment/app/Fragment.java
M fragment/fragment/src/main/java/androidx/fragment/app/FragmentManager.java
M fragment/fragment/src/main/java/androidx/fragment/app/FragmentStateManager.java

https://android-review.googlesource.com/1292291

il...@google.com <il...@google.com> #9Apr 23, 2020 12:16AM

Marked as fixed.

This has been fixed internally and will be available in Fragment 1.3.0-alpha04.

You can confirm the fix in your project by following the snapshot instructions at androidx.dev, using a buildId of 6419956 and Fragment 1.3.0-SNAPSHOT.

th...@outlook.com <th...@outlook.com> #10Apr 23, 2020 12:46AM

That was quick! It works as expected now. Much appreciated