Using Bluetooth Earbuds microphone and buttons

Are there any guides or examples for using the buttons and microphone with standard bluetooth headphones?

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https://developer.android.com/guide/topics/media-apps/mediabuttons

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The documentation says this should work for bluetooth headphones, but I can't seem to catch a keyevent when pressing buttons on the headphones, but do when pressing the volume buttons on the phone itself.

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And while audio plays automatically through my headphones when bluetooth is connected, any sort of recording always uses the phones mic instead of the mic in the headphones.