在onCreateViewHolder中调用父级的getWidth [英] Calling getWidth of parent in onCreateViewHolder

问题描述

在RecyclerView适配器的onCreateViewHolder中获取父级的宽度可以吗?父母的尺寸在那个状态下被测量了，所以当我在父母上调用getWidth()时我不会得到0?

Is it ok to get parent's width in onCreateViewHolder at RecyclerView adapter? Are parent's dimensions measured at that state so I don't get 0 when I call getWidth() on parent?

推荐答案

是的，父级实际上是RecyclerView.在调用onCreateViewHolder时，它的getWidth()和getMeasuredWidth()都为非零值.

Yes, the parent is actually the RecyclerView. It has both a non-zero getWidth() and getMeasuredWidth() by the time onCreateViewHolder is called.

一种简便的验证方法是将调试器设置为停止该方法并检查父级.

Easy way to verify this is set your debugger to stop in the method and inspect the parent.

parent = android.support.v7.widget.RecyclerView{d08d560 VFED..... ......ID 0,0-1080,1698 #7f0c0074 app:id/recyclerView1}

mMeasuredWidth = 1080
mLeft = 0
mRight = 1080

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