A handful of core components and APIs exist only on Android, recognizable by the Android in their names or by the platform they wrap: the navigation drawer, the ripple, the Back button, runtime permissions and toasts. This section uses them in BookNest, then covers what Android asks of every app in 2026: edge-to-edge drawing, the merged manifest, notification channels, and testing code that runs on one platform only. The demos are in src/android/ and ran on the Android 16 emulator.
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Android Components
Android-Specific Components and APIs