Android TextView has height and width of 0

Question

I have a small project where I want to reuse a certain UI component a few time so I created a widget by expanding a ViewGroup. In that ViewGroup I inflated a view that conta

Answer 1

Remember:getHeight() and getWidth()return 0 if components are not drawn yet.

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To find the width And height of a View before it being drawn:

1. First call measure

   view.measure(MeasureSpec.UNSPECIFIED,MeasureSpec.UNSPECIFIED)
   

2. Now you can get width using getMeasuredWidth and height using getMeasuredHeight

   int width = view.getMeasuredWidth();
   int height = view.getMeasuredHeight();
   

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I have posted some more ideas here: How to get width/height of a View

Answer 2

So, I put a bounty on this one, and here is what I've found.

Inflating with a null reference is A Bad Idea(TM). Essentially, that View won't get the proper layout parameters it needs (its parent sets a whole bunch of them, with a whole bunch of magic/logic involved). So inflating into null means no parents, and no inherited layout parameters. One can manually set a number of these parameters, but due to the magic involved it might not solve your problem.

The "solution(s)" that I've come up with involve; using include (when you know how many you need) and pulling them into code, or inflating to a parent (when you need true dynamic, N things). And of course, the XML you inflate will have ID collisions, so I go about it by grabbing the last child (e.g. getChildAt(getChildCount()-1) ) of whatever I'm looking for, etc.

Answer 3

Did you try passing yourself as the root:

View.inflate(context, R.layout.xml, this); 

Since you will be the parent of this View that complies with the javadoc spec.

Answer 4

1) Here is some links to use Hierarchy Viewer on your dev phone.

http://developer.android.com/guide/developing/debugging/debugging-ui.html

and the class you'll need:

http://github.com/romainguy/ViewServer

2) You can also reuse layout like a component with the include tag:

<include android:id="@+id/your_id" layout="@layout/layout_name" />