lint-results.xml

...
   <issue
        id="Instantiatable"
        severity="Fatal"
        message="This class should provide a default constructor (a public constructor with no arguments) (my.package.name.MyView)"
        category="Correctness"
        priority="6"
        summary="Ensures that classes registered in the manifest file are instantiatable"
        explanation="Activities, services, broadcast receivers etc. registered in the manifest file must be &quot;instantiatable&quot; by the system, which means that the class must be public, it must have an empty public constructor, and if it&apos;s an inner class, it must be a static inner class."
        errorLine1="    public MyView(Context context, AttributeSet attrs, int defStyle) {
"
        errorLine2="           ~~~~~~~~~~">
        <location
            file="C:\[...]\NumberView.java"
            line="40"
            column="12"/>
    </issue>
...

MyView.java

...

public class MyView extends View {

    ...

    public MyView(Context context) {
        super(context);
        init(context);
    }

    public MyView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public MyView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context);
    }
    
    // makes lint happy, but I shouldn't need this
    public MyView() {
        super(null);
    }
    ...

}