CODEWITHSUNDEEP
android
michael
michael

Reputation: 110670

Get value of a custom attribute in Java Code

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?

Upvotes: 3

Views: 3524

Answers (1)

Rich Schuler
Rich Schuler

Reputation: 41972

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();
}

Upvotes: 5

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