Tencent Cloud Developer

Feb 1, 2021 · Mobile Development

Flutter Event Propagation and Gesture Recognition Mechanism (Source Code Analysis)

Flutter converts native MotionEvent data into a serialized ByteBuffer, passes it through JNI to the engine, creates a Dart PointerDataPacket, hit‑tests the render tree, dispatches the event to each hit object, and resolves competing GestureRecognizers in the arena so the winning recognizer triggers the appropriate callback such as onTap or onDrag.