gui: more safe (do in mainthread)
gui: more safe (do in mainthread)

albertz/music-player,albertz/music-player,albertz/music-player,albertz/music-player,albertz/music-player,kingsj/music-player,kingsj/music-player,kingsj/music-player,kingsj/music-player,kingsj/music-player,albertz/music-player