[user=37860]Mehdi[/user] jaan As far as I know, Android has such a feature as "default media button registration", which multimedia apps register themselves as default (doesn't need user confirmation) on the operating system. The registration remains intact as long as another multimedia app doesn't "steal" it by registering itself instead of previous app.. So, a music app (in this case Deezer) registers itself every single time it's run. Doing so, until user hasn't used another music app (like play music, of spotify), android recognizes the "media playback" app to be Deezer. This helps the operating system to decide what app it should refer to (the last multimedia app used by user obviously) when for example car Bluetooth or a headset is connected. In this case, android sends an Intent to Deezer (even if the app is closed), which should technically launch Deezer and should be handled by it to start playback. Please refer to: https://developer.android.com/guide/topics/media-
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