MaterialViewPager

MaterialViewPager is a library that creates a scrollable, swipeable interface with an animated header image, toolbar, and logo following Material Design guidelines. It provides a complete implementation of a Material Design ViewPager, where the header background color and image animate as the user swipes between pages.

The library coordinates scroll-driven header animations by synchronising scroll offsets from the ViewPager and attached scrollable views through a central coordinator. It supports fragment-based page composition, allowing each page to have independent content layouts while sharing a common header. The toolbar behavior can be configured to hide, stick, or become transparent based on scroll position, managed through a finite state machine driven by scroll position thresholds.

MaterialViewPager includes a pluggable header layout system that supports swapping between default, custom, Ken Burns effect, or static image layouts. It also offers a tab bar strategy pattern that switches between standard, news-stand, or custom tab bar implementations. The library integrates with RecyclerViews and ScrollViews through an observable scroll view abstraction, and derives header background colors from the current page's dominant image palette using a lightweight color extraction algorithm.

Features

Material Design Components - Provides a complete Material Design ViewPager with animated header, toolbar, and logo.

Material Design Libraries - Provides a complete Material Design ViewPager implementation with animated header, toolbar, and logo.

Shared Header Fragment Pages - Provides fragment-based page composition where each page shares a common animated header.

Animated Image Tabs - Animates header background color and images as the user swipes between pages.

Page Header Components - Animates header background color and images as the user swipes between pages in a view pager.

Scroll-Driven Animation Tools - Synchronizes header image and toolbar animations with scroll position via a central coordinator.

Dominant Color Extraction - Extracts dominant colors from page images to dynamically set the header background.

RecyclerView-ViewPager Scroll Links - Links a RecyclerView's scroll to update the ViewPager's header and toolbar.

Scroll-Aware Toolbar Behaviors - Configures the toolbar to hide, stick, or become transparent as the user scrolls.

Swappable Header Layouts - Replaces the default header with custom, Ken Burns, or static image layouts.

Swappable Header Layouts - Replaces the default header with custom, Ken Burns, or static image layouts in a view pager.

Swappable Header Layouts - Supports swapping between default, custom, Ken Burns, or static header layouts via a single interface.

RecyclerView-ViewPager Scroll Links - Links a RecyclerView's scroll to update the ViewPager's header and toolbar.

Scroll-Aware Toolbar Behaviors - Configures the toolbar to hide, stick, or become transparent based on scroll position in a view pager.

ScrollView-ViewPager Scroll Links - Links a ScrollView's scroll to update the ViewPager's header and toolbar.

Unified - Wraps RecyclerView and ScrollView with a unified scroll listener for header animation coordination.

Toolbar State Machines - Manages toolbar visibility, transparency, and sticky modes via a finite state machine driven by scroll thresholds.

Strategy-Based Tab Bars - Switches between standard, news-stand, or custom tab bars using a strategy pattern.

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Features

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