Hi,
I'm creating my own View class, and defining custom xml attributes
with a attrs.xml. As long as I provide each attribute manually, there
is no problem, but
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable id="my.package.CustomizedButtonView"
name="CustomizedButtonView">
<attr name="borderDrawable" format="reference|color"/>
</declare-styleable>
</resources>
To be honest, I don't understand the proper use of the attributes "id"
and "name" in the above code, but somehow it works. I can now
reference the borderDrawable-Attribute from a layout xml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android";
xmlns:mypack="http://some.weird.url.com/seems/not/to/matter";
<my.package.CustomizedButtonView
android:text="This is my text"
mypack:borderDrawable="@drawable/border243"/>
</LinearLayout>
My class CustomizedButtonView now reads the attribute like this:
public CustomizedButtonView(Context context, AttributeSet attrs) {
super(context, attrs);
int borderDrawableId = attrs.getAttributeResourceValue(
"http://some.weird.url.com/seems/not/to/matter";,
"borderDrawable", -1);
Until now, everything works fine. Many of my CustomizedButtonView will
have the same borderDrawable, but not all of them, so I want to define
a style. My styles.xml reads like this:
<style name="customStyle1">
<item
name="android:text">Default text</item>
<item
name="mypack:borderDrawable">@drawable/border243</item>
</style>
And the layout like that:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android";
xmlns:mypack="http://some.weird.url.com/seems/not/to/matter";
<my.package.CustomizedButtonView
style="@style/customStyle1"/>
</LinearLayout>
The android:text is properly set in my instance, but the
borderDrawable is not. I guess this has something to do with
namespaces, because inside the styles.xml, the
name="mypack:borderDrawable" is not handled by the XML parser's
namespace facility, because its inside an attribute value. So "mypack"
is in no way connected to "http://some.weird.url.com/seems/not/to/
matter" and adding it via xmlns:mypack... to the stylefile would not
help, I guess. In the same file, "android:text" is somehow recognized,
even though "android" is AFAIK only a ns-defintion for "http://
schemas.android.com/apk/res/android", which is also not declared in
that file.
So what is the proper way to set a custom attribute in a style?
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