[Android] Add an item to the context menu

[mjustin]

Zitat:

Copied text is saved to the clipboard and inserted into the text box of my application.

Your application (fortunately) is not allowed to copy text from the SMS / messaging app to your app, or to modify their context menus.
However, your app may register a clipboard change listener.
This way, users may select and copy text, and your listener will be called.