Drawble.Callback

作者: 小山雀 | 来源:发表于2017-02-13 17:09 被阅读0次

如果你想创建一个动画可扩展实现此接口。使用setCallback(android.graphics.drawable.Drawable.Callback)申请将此扩展绑定到Drawable视图，该视图会安排执行动画。

公有方法
abstract void	invalidateDrawable(Drawable who) 需要重绘时调用。 Called when the drawable needs to be redrawn.
abstract void	scheduleDrawable(Drawable who, Runnable what, long when) 调用此方法准备下一帧动画。 A Drawable can call this to schedule the next frame of its animation.
abstract void	unscheduleDrawable(Drawable who, Runnable what) 取消scheduleDrawable(Drawable who, Runnable what, long when)方法的上一次操作。 A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(Drawable, Runnable, long).