How to get the attr reference in code?

Question

I\'m looking to get the pointing reference from an attribute via code. In my xml layouts I can easily get the referenced drawable like this:

android:backgrou         


        

Answer 1

Shouldn't you use:

android:background="@drawable/listItemBackground"

And then:

myImageButton.getBackgroundDrawable()

Or maybe I didn't understand ...

Answer 2

This is how you do it:

// Create an array of the attributes we want to resolve
// using values from a theme
int[] attrs = new int[] { R.attr.listItemBackground /* index 0 */};

// Obtain the styled attributes. 'themedContext' is a context with a
// theme, typically the current Activity (i.e. 'this')
TypedArray ta = themedContext.obtainStyledAttributes(attrs);

// To get the value of the 'listItemBackground' attribute that was
// set in the theme used in 'themedContext'. The parameter is the index
// of the attribute in the 'attrs' array. The returned Drawable
// is what you are after
Drawable drawableFromTheme = ta.getDrawable(0 /* index */);

// Finally, free the resources used by TypedArray
ta.recycle();