| AppStartReasonProvider.kt |
Provides the reason this [Application] instance was started: see [StartReason] for options
and [reason] for details.
This class relies on specific lifecycle method call orders and main thread Runnable scheduling
that could potentially change between OEMs and OS versions: **be careful when using it.** This
implementation was tested on the Moto G5 Android 8.1.0 and the Pixel 2 Android 11.
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| DefaultActivityLifecycleCallbacks.kt |
An inheritance of [Application.ActivityLifecycleCallbacks] where each method has a default
implementation that does nothing. This allows classes that extend this interface to have
more concise definitions if they don't implement some methods; this is in the spirit of
other `Default*` classes, such as [androidx.lifecycle.DefaultLifecycleObserver].
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| StartupActivityLog.kt |
A record of the [Activity] created, started, and stopped events as well as [Application]
foreground and background events. See [log] for the log. This class is expected to be
registered in [Application.onCreate] by calling [registerInAppOnCreate].
To prevent this list from growing infinitely, we clear the list when the application is stopped.
This is acceptable from the current requirements: we never need to inspect more than the current
start up.
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| StartupPathProvider.kt |
This should be a member variable of [Activity] because its data is tied to the lifecycle of an
Activity. Call [attachOnActivityOnCreate] & [onIntentReceived] for this class to work correctly.
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| StartupStateProvider.kt |
Identifies the "state" of start up where state can be COLD/WARM/HOT and possibly others.
This class is nuanced: **please read the kdoc carefully before using it.** Consider contacting
the perf team with your use case.
For this class, we use the terminology from the [StartupActivityLog] such as STARTED and STOPPED.
However, we're assuming STARTED means foregrounded and STOPPED means backgrounded. If this
assumption is false, the logic in this class may be incorrect.
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| StartupTypeTelemetry.kt |
Records telemetry for the number of start ups. See the
[Fenix perf glossary](https://wiki.mozilla.org/index.php?title=Performance/Fenix/Glossary)
for specific definitions.
This should be a member variable of [MainActivity] because its data is tied to the lifecycle of an
Activity. Call [attachOnMainActivityOnCreate] for this class to work correctly.
N.B.: this class is lightly hardcoded to MainActivity.
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