I am using Google Map inside the "Fragment" using sqlite database connection through volley library.

I have 4 location, but my map is showing only one marker. I don't know where exactly getting wrong.

Where do I need to change in my code to get all 4 location markers?

My PHP file:

        <?php

         define('&#95;&#95;ROOT&#95;&#95;', dirname(dirname(&#95;&#95;FILE&#95;&#95;))); 
       require&#95;once(&#95;&#95;ROOT&#95;&#95;.'/public&#95;html/Config.php');


          // Connecting to mysql database
          $mysqli = new mysqli(DB&#95;HOST, DB&#95;USER, DB&#95;PASSWORD, DB&#95;DATABASE);

            // json response array
              $response = array("error" => FALSE);




            // get the tree details for google map marker
              if($stmt = $mysqli->query("SELECT * FROM tree")){



               if ($stmt->num&#95;rows) {


   while($tree = $stmt->fetch&#95;assoc()) {

    $response["error"] = FALSE;

    $response ["tree"] ["treeid"] = $tree['treeid'];
    $response ["tree"] ["treespecies"] = $tree['treespecies'];
    $response ["tree"] ["treelatitude"] = $tree['treelatitude'];
    $response ["tree"] ["treelongitude"] = $tree['treelongitude'];

 echo json&#95;encode($response),'<br>';


           } 
  }else {
     // user is not found with the credentials
$response["error"] = TRUE;
$response["error&#95;msg"] = "Tree list view credentials are wrong. Please    try again!";
echo json&#95;encode($response);
}
 $mysqli->close();

}

The output of PHP File: http://plantnow.net16.net/googlemaplocations.php

  {"error":false,"tree":                                                     {"treeid":"2","treespecies":"Hatti","treelatitude":"5.5","treelongitude":"5.5"}}
      {"error":false,"tree":  {"treeid":"1","treespecies":"Kattoda","treelatitude":"15.4030008","treelongitude":"75.0770729"}}
      {"error":false,"tree":{"treeid":"66","treespecies":"Sampige","treelatitude":"15.4584362","treelongitude":"74.992202"}}
          {"error":false,"tree":  {"treeid":"99","treespecies":"Halasu","treelatitude":"0","treelongitude":"0"}}

My Fragmentactivity.java

  btMap.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {

        String search = String.valueOf(inputSearch.getSelectedItem()).toString();

        mMap = mMapView.getMap();

        mMap.clear();

        //getSelectedLocations(search);

        Toast.makeText(getActivity().getApplicationContext(), "Locations of " + search + " trees", Toast.LENGTH_LONG).show();


        if (search.equals("All Locations")) {
            double latitude = 0;
            double longitude = 0;
            String mark;

            getLocations();

            Toast.makeText(getActivity().getApplicationContext(), "All trees locations ", Toast.LENGTH_LONG).show();



        } else {

            Toast.makeText(getActivity().getApplicationContext(), "Location are not available ", Toast.LENGTH_LONG).show();
        }

    }
});

return v;

}

  private void getLocations() {
// Tag used to cancel the request
String tag_string_req = "req_location";

 // pDialog.setMessage("Logging in ...");
 // showDialog();

StringRequest strReq = new StringRequest(Request.Method.POST,
        AppConfig.URL&#95;MAPLOCATION, new Response.Listener<String>() {

    @Override
    public void onResponse(String response) {
        Log.d(TAG, "Location Response: " + response.toString());
        hideDialog();

        try {
            JSONObject jObj = new JSONObject(response);
            boolean error = jObj.getBoolean("error");

            // Check for error node in json
            if (!error) {

                for (int tree = 0; tree < jObj.length(); tree++) {


                    JSONObject location = jObj.getJSONObject("tree");
                    String treeid = location.getString("treeid");
                    String treespecies = location.getString("treespecies");
                    Double treelatitude = location.getDouble("treelatitude");
                    Double treelongitude = location.getDouble("treelongitude");

                    LatLng latlng = new LatLng(treelatitude, treelongitude);

                    mMap.addMarker(new MarkerOptions().title(treeid)
                                    .position(new LatLng(treelatitude, treelongitude))
                    );

                    // Moving CameraPosition to last clicked position
                    mMap.moveCamera(CameraUpdateFactory.newLatLng(latlng));

                    // Setting the zoom level in the map on last position is clicked
                    mMap.animateCamera(CameraUpdateFactory.newLatLng(latlng));

                    mMap.animateCamera(CameraUpdateFactory.zoomTo(4));

                }

                // Launch main activity

            } else {
                // Error in login. Get the error message
                String errorMsg = jObj.getString("error&#95;msg");
                Toast.makeText(getActivity().getApplicationContext(),
                        errorMsg, Toast.LENGTH&#95;LONG).show();
            }
        } catch (JSONException e) {
            // JSON error
            e.printStackTrace();
            Toast.makeText(getActivity().getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH&#95;LONG).show();
        }

    }
}, new Response.ErrorListener() {

    @Override
    public void onErrorResponse(VolleyError error) {
        Log.e(TAG, "Login Error: " + error.getMessage());
        Toast.makeText(getActivity().getApplicationContext(),
                error.getMessage(), Toast.LENGTH&#95;LONG).show();
        hideDialog();
    }
}) {



};

  // Adding request to request queue
  AppController.getInstance().addToRequestQueue(strReq, tag&#95;string&#95;req);
      }