show info window on every marker at a time in android

Question

how can show info window on every marker at a time Try but only show the last marker in Google Maps

gMap.addMarker(markerOptions);
        Marker = gMap.addMarker(markerOptions);
        Marker.showInfoWindow(); 

Answer 1

Displaying multiple info windows for multiple markers at the same time is not currently possible. Google's documentation states:

An info window allows you to display information to the user when they tap on a marker. Only one info window is displayed at a time. If a user clicks on a marker, the current info window will be closed and the new info window will be displayed. Note that if the user clicks on a marker that is currently showing an info window, that info window closes and re-opens.

For potential workarounds please check out these related threads and their proposed solutions:
How to open a Infowindow on every marker (multiple marker) in android?
Multiple Info Windows in Android Maps API 2
Show multiple infoWindows on google maps api, android

Hope this helps!