Question 1

How to install react-native-collapsing-toolbar in a React Native Android project?

Accepted Answer

Install both this library and react-native-nested-scroll-view via npm, then manually add packages to MainApplication.java and update build.gradle and settings.gradle files, as shown in the Getting Started section—it's more involved than typical React Native libraries.

Question 2

react-native-collapsing-toolbar or JavaScript-based collapsing header libraries: which is better?

Accepted Answer

This library offers superior performance and authentic Material Design by using native Android APIs, but it's limited to Android. JavaScript alternatives like react-native-animated-header might be cross-platform but can lack smoothness and native feel.

Question 3

How to add a parallax effect to a collapsing toolbar in React Native?

Accepted Answer

Use the CollapsingParallax component inside CollapsingToolbarLayout and set the parallaxMultiplier prop—values above 1 create a parallax scroll effect, as explained in the API section with example code.

Question 4

Can I use react-native-collapsing-toolbar with React Navigation?

Accepted Answer

Integration is tricky because this library relies on native CoordinatorLayout, which may conflict with React Navigation's header management. You'll likely need custom coordination or avoid combining them, as the README doesn't address navigation libraries.

Question 5

Why is my FlatList not scrolling properly with the collapsing toolbar?

Accepted Answer

Ensure you're using the renderScrollComponent prop to wrap FlatList in NestedScrollView, and follow the exact component order from the README—deviations can break the scrolling coordination due to the fragile structure.

Question 6

How to animate an image while the toolbar collapses?

Accepted Answer

Use the onOffsetChanged event from AppBarLayout with Animated.Event to drive custom animations, like rotating an image based on scroll offset, as demonstrated in the Animated.Events usage example with interpolation.

react-native-collapsing-toolbar

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