Writing Custom Views for Android

on YouTube ↗40m

" summary

Covers concrete practices for custom Android views: use onAttachedToWindow and onDetachedFromWindow to allocate and release resources, prefer the animation framework over manual timers for pulsing effects, and avoid deep view hierarchies because requestLayout bubbles up and is expensive. Explains measure/layout with MeasureSpec modes (EXACTLY, AT_MOST, UNSPECIFIED), how to implement custom LayoutParams, when to override onDraw versus dispatchDraw, touch negotiation via onInterceptTouchEvent and getScaledTouchSlop, and how to save view state correctly.

AI-written summary · about

" chapters (7)

1. 0:00Introduction
2. 0:42Why write custom views
3. 3:48Life overview
4. 22:50Drawing
5. 26:59Instance State
6. 29:21Touch Events
7. 36:33Animations

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