[mfazekas]

On the new backend, onSurfaceTextureSizeChanged now resizes the RiveSurface through a reflective call to the Kotlin-internal RiveSurface.resize (resolved by name prefix and (int, int) signature, cached), mirroring what upstream RiveView does. It fails open: if the method is missing or throws, it logs a warning and keeps the old size. Fit.Layout resizes are also followed by a zero advance, since the render loop stops advancing a settled or paused state machine and the artboard resize would otherwise never apply. Adds an Issue #418 reproducer page.

Fixes #418

[Nezz]

Thanks for fixing this, I was about to make a report because I just came across the same issue on Android.

[sahzhang]

@mfazekas do you have an ETA for when this can be included in a released version?

[Copilot]

🟡 Changes recommended

The layout advance can run before data binding, freeze responsive animations after resizing, or trigger state-machine transitions on paused views during unrelated prop updates.

3 open issues

• Resume advancement after responsive layout changes · New
• Defer initial advancement until data binding completes · New
• Avoid layout advancement when dimensions are unchanged · New

What changed in this PR

This PR addresses issue #418 by updating Android’s experimental backend to resize the render surface when its view changes size, rather than retaining the creation-time dimensions.

Changes:

• Adds cached reflective access to the SDK’s internal surface resize method, with warning logs on failure.
• Advances Fit.Layout state machines by zero time after artboard resizing to apply layout updates.
• Adds a reproducer comparing animated height changes with remounting.

File	Description
example/​src/​reproducers/​Issue418SurfaceResize.tsx	Adds height-toggle and remount controls to reproduce issue #418.
android/​src/​new/​java/​com/​rive/​RiveSurfaceResize.kt	Adds the reflective surface-resize helper.
android/​src/​new/​java/​com/​rive/​RiveReactNativeView.kt	Connects surface resizing and zero-time layout advancement.

_{Review effort: Balanced}

[Copilot]

🟡 Changes recommended

Reloads can apply a stale resize to a new paused state machine, while layout changes can cause indefinite frame advances because SDK settling is not reset.

2 open issues

• Clear pending layout resize state when reloading · New
• Reset SDK settling state after layout changes · New

3 resolved since last review

• Avoid layout advancement when dimensions are unchanged
• Defer initial advancement until data binding completes
• Resume advancement after responsive layout changes

_{Review effort: Balanced}

[Copilot]

🔵 Needs a closer look

A pending layout advance can run after switching away from Layout, causing a paused state machine to consume inputs or fire transitions.

No open issues 🎉

1 previously missed issue

In code that hasn't changed since last review

Clear pending layout advance when switching to a non-Layout fit

android/​src/​new/​java/​com/​rive/​RiveReactNativeView.kt:357

If a paused Layout view is resized and its fit changes to a non-Layout fit before the next frame, the fit update does not reload the state machine, so this branch leaves the previous layout advance pending. The next frame then advances the paused machine and can consume inputs or fire transitions even though the current fit no longer needs that layout update. Clear the pending advance when leaving Layout.

2 resolved since last review

• Reset SDK settling state after layout changes
• Clear pending layout resize state when reloading

_{Review effort: Balanced}

[mfazekas]

Re the previously missed issue in Copilot's last review (a pending layout advance surviving a switch to a non-Layout fit): fixed in 9f3ac21. resizeArtboardIfLayout() now clears layoutAdvancePending along with appliedLayout when the fit is not Layout.

[Copilot]

🟡 Changes recommended

Switching a paused view away from Fit.Layout leaves the artboard resized, causing other fits to render with incorrect bounds.

1 open issue

• Reset authored artboard size when leaving Layout fit · New

_{Review effort: Balanced}