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When sharing a file to other apps by pressing the share button from an image viewer etc. on recent Android (per 8.0), GoogleDrive folders on the app's icon list, mail app address candidates, LINE talk room Some of them are displayed, and you can throw the file directly.

What is this function? Intent Filter alone does not come out here as the application implementation side, but what kind of implementation should I do to get it out?

I went back to Google's OS documentation and checked the new features. Can you tell me if you know the name of the function or the name of the implementation API?