Wrapper for a text attribute value which represents an annotation. An annotation has two special aspects:

1. it is connected to a range of main text; if this range or the main text is changed then the annotation becomes invalid,
2. it can not be joined with adjacent annotations even if the text attribute value is the same.

By wrapping text attribute values into an Annotation, these aspects will be taken into account when handling annotation text and the corresponding main text.

Note: There is no semantic connection between this annotation class and the java.lang.annotation package.

[Android Documentation]