[Android] Add an item to the context menu

[danten]

Hi, how do I create an association in the context menu and run my program?

I have a program that encodes and decodes the text.

The user receives an encrypted SMS, marks the text, and displays "Open in My Program" in the menu. Same menu like copy, paste ....

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

It must be functional on all mobile devices.

Thank you