Issue related to using android attribute (attr) defined in another package aar

Suppose it attr

is defined in package aar

( com.pack1

) as

<attr name="attr0" format="string" />

      

        
        
        
      

    

and in another package (say com.pack2

that has a dependency on com.pack1

), I define styleable

as

<attr name="attr2" format="integer" />
<declare-styleable name="view2">
    <attr name="attr1" format="string" />
    <attr name="attr2" />
</declare-styleable>

      

        
        
        
      

    

and I have a custom view in com.pack2

like

public class View2 extends LinearLayout
{
    public View2(Context context, AttributeSet attributeSet)
    {
        super(context, attributeSet);
        View.inflate(context, R.layout.view2, this);
        try
        {
            TypedArray typedArray = context.obtainStyledAttributes(attributeSet, R.styleable.view2);
            {
                if (typedArray.hasValue(R.styleable.view2_attr1))
                {
                    String t = typedArray.getString(R.styleable.view2_attr1);
                    logger.debug("attr1 -> has value -> {}", t);
                }
                else
                    logger.debug("attr1 -> no value");
                if (typedArray.hasValue(R.styleable.view2_attr2))
                {
                    int t = typedArray.getInteger(R.styleable.view2_attr2, 0);
                    logger.debug("attr2 -> has value -> {}", t);
                }
                else
                    logger.debug("attr2 -> no value");
            }
            typedArray.recycle();
        }
        catch (Throwable t)
        {
            logger.debug(t.toString());
        }
    }
}

      

        
        
        
      

    

And I add custom view to layout as

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:custom="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <com.pack2.View2
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        custom:attr1="this is a test"
        custom:attr2="1000"
        />

</LinearLayout>

      

        
        
        
      

    

Until then, when I run the application everything is working fine and the log says that

attr1 -> has value -> this is a test
attr2 -> has value -> 1000

      

        
        
        
      

    

but as soon as I change styleable

how

<attr name="attr2" format="integer" />
<declare-styleable name="view2">
    <attr name="attr0" />
    <attr name="attr1" format="string" />
    <attr name="attr2" />
</declare-styleable>

      

        
        
        
      

    

and run the application. I am getting wrong results. The registrar informs that

attr1 -> no value

      

        
        
        
      

    

and an exception happened

java.lang.UnsupportedOperationException: Can't convert to integer: type=0x3

      

        
        
        
      

    

Sounds like "This is a test" value being consumed for attr0

, although this attribute is not defined in the layout. Note that the application compiles correctly, but the result is incorrect.

Why am I getting this result?