SaveStateObserver

Android tool to output the contents sizes of saved state bundles in onSaveInstance state calls. This will allow you to analyze your bundles as you pass data to other classes to prevent them from growing to sizes that are not allowed by Android.

Usage

To use in debug builds only use:

debugImplementation 'com.pnuema.android:savestateobserver:2.12.1'

Once it has been included as a dependency it will listen for lifecycle state changes and output the following information without any code being inserted in your codebase.

Example Logcat:

   2022-07-06 08:59:54.618 27026-27026/com.pnuema.android.savestateobserver.app D/SaveStateObserver: ===== SaveStateObserver =====
MainActivity saved Bundle@142181721 which contained 8 elements for 304.73 KB
     String = 32 bytes
     Bundle@238359838 innerBundle contained 4 elements for 100.17 KB
         String = 40 bytes
         BigString = 100.02 KB
         Integer = 8 bytes
         Float = 8 bytes
     Bundle@205345279 android:viewHierarchyState contained 1 elements for 612 bytes
         android:views = 568 bytes
     Integer = 8 bytes
     Float = 8 bytes
     Bundle@257018828 androidx.lifecycle.BundlableSavedStateRegistry.key contained 4 elements for 203.19 KB
         Bundle@229907989 androidx:appcompat contained 0 elements for 4 bytes
         Bundle@1664298 android:support:lifecycle contained 0 elements for 4 bytes
         Bundle@2035483 android:support:activity-result contained 5 elements for 1.39 KB
             KEY_COMPONENT_ACTIVITY_RANDOM_OBJECT = 152 bytes
             KEY_COMPONENT_ACTIVITY_REGISTERED_KEYS = 752 bytes
             KEY_COMPONENT_ACTIVITY_REGISTERED_RCS = 56 bytes
             Bundle@230021304 KEY_COMPONENT_ACTIVITY_PENDING_RESULT contained 0 elements for 4 bytes
             KEY_COMPONENT_ACTIVITY_LAUNCHED_KEYS = 8 bytes
         Bundle@80053905 android:support:fragments contained 1 elements for 201.54 KB
             android:support:fragments = 201.47 KB
     android:lastAutofillId = 8 bytes
     android:fragments = 336 bytes

Notification

Consumers can register for detection events. Start by registering this on application start in debug only code to receive notifications and perform the action intended such as logging analytic events, or reporting a bug.

Example:

    uuid = OversizeBundleRegistrar.register { stringifyBundle ->
        // Action to perform when oversize bundle is detected
    }

Make sure to unregister when you no longer want to trigger the work to be done:

Example:

    OversizeBundleRegistrar.unregister(uuid)