にこのヘルプJSON配列を解析した後、マーカーを配置することができます
[
{
"id": "1",
"lat": "21.3",
"lon": "23.55",
}, {
"id": "2",
"lat": "21.3",
"lon": "23.55",
}
//...
{
"id": "30",
"lat": "21.3",
"lon": "23.55"
}
]
JsonArrayRequest req = new JsonArrayRequest(YOUR_WEB_SERVICE_URL,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
try {
// Parsing json array response
// loop through each json object
jsonResponse = "";
for (int i = 0; i < response.length(); i++) {
JSONObject location = (JSONObject)response.get(i);
String id = location.getString("id");
String lat = location.getString("lat");
String lon = location.getString("lon"); //lat and lon are String you have to typecast it to double before using it
Latlon ll = new Latlon(lat, lon);
placeYourMarkerFuction(ll);
}
}
catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
// Add Request to queue
}
これを見てください: [リンク](https://gist.github.com/saxman/5347195)と、この[リンク](http://stackoverflow.com/questions/13966632を/ plotting-multiple-mark-on-google-map-in-android) –