its me again with a new question
I want to write a library for android.
I know how to do this for Java. In Android I have to do it similar.
Now here is the question:
I want to use some android classes, for example the smsManager.
If I write a regularly android application my class extends activity.
But I don't need any activities or GUIs, etc.
How can I declare my class, that I can use the smsManager?