android - Define a required attribute for

Question

Is it possible to define the stylable attributes as required? (as in XSD schemas)

<declare-styleable name="PieChart">
    <attr name="name" format="string" use="required"/>
</declare-styleable>    

The above XML does not work, is there another syntax to achieve it?

Answer 1

如果在 attr 值为 null 的情况下在构造函数中抛出异常怎么办？