我要评论参考： https://blog.csdn.net/fengshenlangzi/article/details/51727264?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase
view/activity的生命周期关系
在MyActivity中布局添加一个CustomView，然后在各个回调中添加log，会有如下调用顺序：
E/MyActivity: onCreate:
E/CustomView: onFinishInflate:
E/MyActivity: onResume:
E/MyActivity: onAttachedToWindow:
E/CustomView: onAttachedToWindow:
E/CustomView: onMeasure:
E/CustomView: onMeasure:
E/CustomView: onMeasure:
E/CustomView: onSizeChanged:
E/CustomView: onLayout:
E/CustomView: onDraw:
E/MainActivity: onWindowFocusChanged: true
E/CustomView: onWindowFocusChanged: true
//接下来退出Activity
E/MainActivity: onWindowFocusChanged: false
E/CustomView: onWindowFocusChanged: false
E/MyActivity: onDestroy:
E/CustomView: onDetachedFromWindow:
E/MyActivity: onDetachedFromWindow:
因此如果是在 onCreate或者是onResume 里面获取View的 宽高，得到的都是0.
可以用View.post(Runnable)来延后 执行
本文地址：https://blog.csdn.net/GYBIN02/article/details/108129496
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