android 动画绘图 ， 自定义view ， 很好的学习资料 。 游戏基础-android animation graphics, custom view, good learning materials. Game basis

Android 自定义 View 绘图基础 控件的测量可以说是固定写法，原生的View只支持EXACTLY的测量模式，我们自定义的控件可以重写onMeasure方法(The measure of a control can be said to be a fixed writing method, and the native View only supports the EXACTLY measurement mode, and our custom controls can rewrite