如何理解android完成绘制视图？(How to understand that android finished drawing a view? [duplicate])

如何理解android完成绘制视图？(How to understand that android finished drawing a view? [duplicate])

可能重复： 活动何时完成绘图本身？

我想知道一个视图何时完成其绘图，这是可能的吗？ 我如何理解android是否完成了绘制视图？

Possible Duplicate: When has the Activity finished drawing itself?

I want to know when a view completes its drawing, is that possible? How can I understand if android finished drawing a view or not?

最满意答案

添加一个ViewTreeObserver到它。

样品，

TextView pagerView1=new TextView(this); ViewTreeObserver textViewTreeObserver=pagerView1.getViewTreeObserver(); textViewTreeObserver.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { public void onGlobalLayout() { //Do your operations here. pagerView1.removeGlobalOnLayoutListener(this); } });

这是一个Listener，一旦被完全绘制，就会被调用。 所以我已经将它用于TextView。 同样，您可以使用您所做的任何视图。 在onGlobalLayout（）里面你可以做你的代码。

Add a ViewTreeObserver to it.

Sample,

TextView pagerView1=new TextView(this); ViewTreeObserver textViewTreeObserver=pagerView1.getViewTreeObserver(); textViewTreeObserver.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { public void onGlobalLayout() { //Do your operations here. pagerView1.removeGlobalOnLayoutListener(this); } });

This is a Listener which gets called once that particular gets drawn completely. So I have made it use for TextView. Similarly you can make use of any view you do. And inside onGlobalLayout() you can do your code.