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Android: View.measure(int,int) always wants to be (0,0)

Answer 1

+1 A:

My guess is that you're measuring the view in onCreate(). The view isn't drawn yet. You have to wait until a time after the view is drawn before you can measure it.

Falmarri 2010-10-14 20:41:21

Maybe my approach isn't right. I need to know how big the view is before I can draw, it no?

EightyEight 2010-10-14 21:08:56

How exactly are you drawing it and where? Why don't you just use wrap_content?

Falmarri 2010-10-14 21:10:52

I have a callback that's attached to a button. The callback sets the visibility of webview to VISIBLE, then calls webView.measure(), then calls webView.layout(). I'm not sure what wrap_content is.

EightyEight 2010-10-14 21:17:02

You need to post some more code then. This is a pretty non standard way to draw a view.

Falmarri 2010-10-14 21:37:25

Answer 2

+2 A:

This:

addView(webView, ViewGroup.LayoutParams.WRAP_CONTENT);

is very wrong. The second parameter, when passed as an int, is the index of the view inside the parent. This does not do what you think it does. You should pass a new instance of LayoutParams instead.

Your problem is probably that you do a measurement before the WebView had time to load the HTML document. You measure with the constraint AT_MOST 3000, and 0 definitely respects that constraints. WebView is just telling you that its content has a height of 0 for now.

Romain Guy 2010-10-14 20:41:40

Oh, wow. You're totally right. I updated code above, with no difference.

EightyEight 2010-10-14 21:01:30

I don't think loadData() is synchronous. You need to wait until WebView has finished parsing the data and built the DOM. There must be a listener for this.

Romain Guy 2010-10-14 22:05:01

For future googlers; WebView dispatches an event to a PictureListener when it has finished laying itself out.

EightyEight 2010-10-15 17:30:35

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Android: View.measure(int,int) always wants to be (0,0)

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