And call initCompose() in Launcher.java. Therefore there is no behavior
change for BaseActivity, or other ActivityContext subtypes that don't
call initCompose().
This should work for non-activity subtypes of ActivityContext. It's
likely that the Launcher activity will require more complete supoort for
Lifecycle and SavedState.
Note: In order to test the ComposeView, need to build this CL together
with ag/22461463.
1. `ViewTreeLifecycleOwner.set(..., ...);` is necessary to fix the
following crash:
java.lang.IllegalStateException: ViewTreeLifecycleOwner not found
This error comes from WindowRecomposer.android.kt
- http://cs/androidx-platform-dev/compose/ui/ui/src/androidMain/kotlin/androidx/compose/ui/platform/WindowRecomposer.android.kt;l=351-354;rcl=5673af1441ebe04c776f528193dfc5f85c0c9a66
2. `ViewTreeSavedStateRegistryOwner.set(..., ...);` is necessary to fix
the following crash:
java.lang.IllegalStateException: Composed into the View which doesn't propagateViewTreeSavedStateRegistryOwner!
This error comes from AndroidComposeView.android.kt.
- http://cs/androidx-platform-dev/compose/ui/ui/src/androidMain/kotlin/androidx/compose/ui/platform/AndroidComposeView.android.kt;l=1178-1183;rcl=5673af1441ebe04c776f528193dfc5f85c0c9a66
3. The lifecycle needs to be STARTED. Otherwise the ComposeView doesn't
show up in its parent (i.e., isn't drawn).
- In ComponentActivity, `onSaveInstanceState` starts the lifecycle.
- In ComposeInitializeImpl (from SystemUI),
ViewLifecycleOwner.updateState() starts the lifecycle when the
window is visible and in focus.
The implementation in this CL does the same thing as the
ComposeInitializeImpl.
Bug: 275905704
Test: on device, trigger a card such as the timer
Test: RUN_ERROR_PRONE=True m out/soong/.intermediates/packages/apps/Launcher3/Launcher3/android_common/lint/lint-report.xml
Test: RUN_ERROR_PRONE=True m out/soong/.intermediates/vendor/google/gms/packages/SearchLauncher/SearchLauncher/android_common/lint/lint-report.html
Test: Presubmit
Change-Id: Ieced66ad5238916a82ea13c01f69146bbdcf287a
Xiaowen Lei