When selecting text in a browser, there is usually a "search" action available on the actions pop-up.
Duckduckgo's native app seems to support this and is open source so that would be a good source of information for what the intent filter might look like.
When selecting text in a browser, there is usually a "search" action available on the actions pop-up. Duckduckgo's native app seems to support this and is open source so that would be a good source of information for what the intent filter might look like.