IssueTracker

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

commit c60f33e229e31ab328ef6b59dab63b264954831c
Author: Alexandre Elias <aelias@google.com>
Date:   Fri Jul 10 16:23:09 2020

    Semantics no-op cleanups
   
    Partly in response to lmr's broad code review, I did a pass of
    superficial API/implementation cleanup.  The main changes are:
   
    - I changed each Boolean SemanticsProperty where false is equivalent to
      not being present to take "Unit" instead.  This is conceptually
      clearer: it avoids questions like "can I cancel out a semantics from a
      merged child by setting it to false?"  Because "property = Unit" looks
      weird, I also changed the style of these to "property()".
   
    - I moved the Semantics id generator closer to where it's used, in
      SemanticsModifierCore.  I made it internal and an AtomicInt.
      (Note that integer ids are heavily used in the Android
      AccessibilityNodeInfo APIs so I can't simply remove them entirely.)
   
    - I deleted dead code.  Some examples include SemanticsHintOverrides,
      a public API not connected to anything, and SemanticsPropertyKey
      merge() open method which is never called.  (In both cases I have
      a different plan in mind for accessibility.)
   
    Fixes: 145951226
    Fixes: 145955412
    Test: existing tests
    Relnote: "Single-value semantics properties now use a calling style.
    For example, 'semantics { hidden = true }' is now written as:
    'semantics { hidden() }'."
   
    Change-Id: Ic1afd12ea22c926babc9662f1804d80b33aa0cfc

M       ui/integration-tests/benchmark/src/androidTest/java/androidx/ui/benchmark/test/LayoutNodeModifierBenchmark.kt
M       ui/ui-core/api/0.1.0-dev15.txt
M       ui/ui-core/api/current.txt
M       ui/ui-core/api/public_plus_experimental_0.1.0-dev15.txt
M       ui/ui-core/api/public_plus_experimental_current.txt
M       ui/ui-core/api/restricted_0.1.0-dev15.txt
M       ui/ui-core/api/restricted_current.txt
M       ui/ui-core/src/androidAndroidTest/kotlin/androidx/ui/graphics/vector/VectorTest.kt
M       ui/ui-core/src/androidAndroidTest/kotlin/androidx/ui/semantics/SemanticsTests.kt
M       ui/ui-core/src/androidMain/kotlin/androidx/ui/core/AndroidActuals.kt
M       ui/ui-core/src/androidMain/kotlin/androidx/ui/core/AndroidComposeView.kt
M       ui/ui-core/src/androidMain/kotlin/androidx/ui/core/AndroidComposeViewAccessibilityDelegateCompat.kt
M       ui/ui-core/src/androidMain/kotlin/androidx/ui/core/AndroidPopup.kt
M       ui/ui-core/src/commonMain/kotlin/androidx/ui/core/Expect.kt
M       ui/ui-core/src/commonMain/kotlin/androidx/ui/core/semantics/SemanticsConfiguration.kt
D       ui/ui-core/src/commonMain/kotlin/androidx/ui/core/semantics/SemanticsHintOverrides.kt
M       ui/ui-core/src/commonMain/kotlin/androidx/ui/core/semantics/SemanticsModifier.kt
M       ui/ui-core/src/commonMain/kotlin/androidx/ui/core/semantics/SemanticsNode.kt
M       ui/ui-core/src/commonMain/kotlin/androidx/ui/core/semantics/SemanticsOwner.kt
M       ui/ui-core/src/commonMain/kotlin/androidx/ui/core/semantics/SemanticsWrapper.kt
M       ui/ui-core/src/commonMain/kotlin/androidx/ui/semantics/SemanticsProperties.kt
M       ui/ui-foundation/api/0.1.0-dev15.txt
M       ui/ui-foundation/api/current.txt
M       ui/ui-foundation/api/public_plus_experimental_0.1.0-dev15.txt
M       ui/ui-foundation/api/public_plus_experimental_current.txt
M       ui/ui-foundation/api/restricted_0.1.0-dev15.txt
M       ui/ui-foundation/api/restricted_current.txt
M       ui/ui-foundation/src/main/java/androidx/ui/foundation/Clickable.kt
M       ui/ui-foundation/src/main/java/androidx/ui/foundation/Dialog.kt
M       ui/ui-foundation/src/main/java/androidx/ui/foundation/Scroller.kt
M       ui/ui-foundation/src/main/java/androidx/ui/foundation/selection/Selectable.kt
M       ui/ui-foundation/src/main/java/androidx/ui/foundation/selection/Toggleable.kt
M       ui/ui-foundation/src/main/java/androidx/ui/foundation/semantics/FoundationSemanticsProperties.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/ButtonTest.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/CardTest.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/CheckboxScreenshotTest.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/RadioButtonScreenshotTest.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/ScaffoldTest.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/SnackbarTest.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/SurfaceTest.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/ripple/RippleIndicationTest.kt
M       ui/ui-material/src/androidTest/java/androidx/ui/material/textfield/TextFieldScreenshotTest.kt
M       ui/ui-material/src/main/java/androidx/ui/material/AppBar.kt
M       ui/ui-material/src/main/java/androidx/ui/material/TextFieldImpl.kt
M       ui/ui-test/src/androidTest/java/androidx/ui/test/AssertsTest.kt
M       ui/ui-test/src/androidTest/java/androidx/ui/test/CallSemanticsActionTest.kt
M       ui/ui-test/src/androidTest/java/androidx/ui/test/ErrorMessagesTest.kt
M       ui/ui-test/src/androidTest/java/androidx/ui/test/FindersTest.kt
M       ui/ui-test/src/androidTest/java/androidx/ui/test/PrintToStringTest.kt
M       ui/ui-test/src/androidTest/java/androidx/ui/test/ScrollToTest.kt
M       ui/ui-test/src/androidTest/java/androidx/ui/test/TextActionsTest.kt
M       ui/ui-test/src/main/java/androidx/ui/test/Actions.kt
M       ui/ui-test/src/main/java/androidx/ui/test/Filters.kt
M       ui/ui-text/api/0.1.0-dev15.txt
M       ui/ui-text/api/current.txt
M       ui/ui-text/api/public_plus_experimental_0.1.0-dev15.txt
M       ui/ui-text/api/public_plus_experimental_current.txt
M       ui/ui-text/api/restricted_0.1.0-dev15.txt
M       ui/ui-text/api/restricted_current.txt
M       ui/ui-text/src/commonMain/kotlin/androidx/ui/text/CoreTextField.kt
M       ui/ui-text/src/commonMain/kotlin/androidx/ui/text/TextSemanticsProperties.kt

https://android-review.googlesource.com/1360099

My use case seems pretty common when you want to move forward in the stack with a shared element transition and doesn't want to go back to that screen but another screen previously added to the stack.
I understand the screen is detached since it's not added to the stack but then shouldn't that screen wait for transition to complete befofe being detached?

Yep, it should work.

For future reference, this is the exception message I get running your sample (thanks, it was very helpful):

2018-12-07 11:10:56.152 19973-19973/com.example.samystudio.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.samystudio.myapplication, PID: 19973
    java.lang.NullPointerException: Attempt to invoke interface method 'boolean java.util.Collection.contains(java.lang.Object)' on a null object reference
        at androidx.collection.MapCollections.retainAllHelper(MapCollections.java:481)
        at androidx.collection.ArrayMap.retainAll(ArrayMap.java:164)
        at androidx.fragment.app.FragmentTransition.captureOutSharedElements(FragmentTransition.java:801)
        at androidx.fragment.app.FragmentTransition.configureSharedElementsReordered(FragmentTransition.java:573)
        at androidx.fragment.app.FragmentTransition.configureTransitionsReordered(FragmentTransition.java:233)
        at androidx.fragment.app.FragmentTransition.startTransitions(FragmentTransition.java:133)
        at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2424)
        at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2372)
        at androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
        at androidx.fragment.app.FragmentManagerImpl$1.run(FragmentManager.java:733)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

This is currently one of our highest crashes. Is there a short term solution we can try or can we expect an update soon?

We had to remove our shared element transitions because of this crash with Navigation and popUpTo. Is there a better workaround?

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

commit 0cd3b081e65a5a15e2d1a9bf32399cb10c4d07ae
Author: jbwoods <jbwoods@google.com>
Date:   Tue Jul 09 14:01:35 2019

    Fix NPE when combining pop with add transaction
   
    When adding a transaction with a shared transition after popping a
    transaction without a shared transition, if reordering is allowed, a NPE
    is thrown. This ensures that the reordered transactions will not break.
   
    Test: Added Test
    BUG: 120507394
    Change-Id: Id37913b642cf4b4fe30ff52cfeed9f28be87f850

M       fragment/fragment/src/androidTest/java/androidx/fragment/app/FragmentTransitionTest.kt
M       fragment/fragment/src/main/java/androidx/fragment/app/FragmentTransition.java

https://android-review.googlesource.com/1013801
https://goto.google.com/android-sha1/0cd3b081e65a5a15e2d1a9bf32399cb10c4d07ae

This has been fixed internally and will be available in the Fragment 1.2.0-alpha02 release.