android - Google Maps Location - Blue dot No and Button Yes -

i have app google maps custom marker in location. i'm trying map showing location button not blue dot. i've tried not works:

mapa.setmylocationenabled(false);

mapa.getuisettings().setmylocationbuttonenabled(true);

this code not shows button , blue dot. how do?

the location button visible when my location layer enabled setmylocationenabled method. can simulate behavior adding similar button of own center on user's location when pressed.