title: Cast String data type to double in Firebase
body: <p>I'm get data from dataSnapshot Firebase. My data all is String. I can get data but can't cast String to double, if I cast, my app will stop. Please help me.</p>
  
  <pre><code> mReference.addChildEventListener(new ChildEventListener() {
          @Override
          public void onChildAdded(DataSnapshot dataSnapshot, String s) {
              String strName=(String) dataSnapshot.child("name").getValue();
              String strphone=(String) dataSnapshot.child("phone").getValue();
              String lati=(String) dataSnapshot.child("latitude").getValue();
              String longti=(String) dataSnapshot.child("longtitude").getValue();
              String strDiemden=(String) dataSnapshot.child("diemden").getValue();
  
            // double lati=Double.parseDouble(strLat);
             // double longti=Double.parseDouble(strLong);
              ;
            mMap.addMarker(new MarkerOptions().position(new LatLng(lati,longti)).title(strName));
  </code></pre>