Unable to add markers using latitude and longitude retrieved from Firebase and stored in ArrayList<String>
问题 I am developing an app which has an activity having map in it. When users open this activity from their devices, their current location coordinates is saved in the Firebase and then are retrieved instantly and a marker is shown on their current location. This procedure is happening successfully. Here's how I'm retrieving the latitude and longitude from firebase: acceptingUserReference.child(requestID).child(key).addListenerForSingleValueEvent(new ValueEventListener() { @Override public void