So I would like to know how can I implement similar functionality in my app or at least what's its name or how can I search for it. I can highligh any text in any app, a little list comes up, and shows me that the text can be "used within tha Google Translates app" - in this case the text will be translated. Is this implemented by broadcast receiver? Or something else? Here is a picture. "Fordítás" means "translate" in my language.
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                    1if you're asking what a feature on android is called, it's probably off-topic here. if you're asking how to implement it, that's too broad :) – a_local_nobody Mar 16 '20 at 20:00
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                    Without mentioning that you are trying to build an app, feature identification is a bit more on topic at: https://android.stackexchange.com/ which is for end-users of Android. – Morrison Chang Mar 16 '20 at 20:04
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                    Does this answer your question? [How to add an item to the text selection popup menu?](https://stackoverflow.com/questions/51632908/how-to-add-an-item-to-the-text-selection-popup-menu) – Nicolas Mar 16 '20 at 20:38