Get value of a custom attribute in Java Code

Question

I create an attribute in attrs.xml file:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="Custom">
        <attr name="src" format="integer" />
    </declare-styleable>
</resource>

And in my code, I get the value of the attribute like this: attrs.getAttributeIntValue("mynamespace", "src", -1);

It works. I get the value of 'src' from the layout xml file. But my question is why android does not generate a value in R class so that I don't need to use the string 'src' again in my java code?

Rich Schuler · Accepted Answer · 2012-04-13 04:48:11Z

5

Instead use the TypedArray

public CustomView(final Context context) {
    this(context, null);
}

public CustomView(final Context context,
            final AttributeSet attrs) {
    this(context, attrs, 0);
}

public CustomView(final Context context,
            final AttributeSet attrs, final int defStyle) {
        super(context, attrs, defStyle);

    final TypedArray a = context.obtainStyledAttributes(attrs,
                R.styleable.Custom, defStyle, 0);

    int src = a.getInt(R.styleable.Custom_src, 0);

    a.recycle();
}

answered Apr 13, 2012 at 4:48

Rich Schuler

42k6 gold badges75 silver badges59 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Get value of a custom attribute in Java Code

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related