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を通過した後、JSONからウェイポイントを抽出し、「アンドロイド」しかし、私は、アプリケーションの「ウェイポイント」を追加することによって、それを編集したい、2アドレスポイントを取り、地図上に表示されます。私の質問は、どのようにjsonからウェイポイント情報を抽出するのか、以下に抽出される開始情報と終了情報のようなものです。 StringへJSONを変換するにはGoogleマップV2：以下のコード文字列配列
public class DirectionJsonParser {
private static final String DIRECTION_URL_API = "https://maps.googleapis.com/maps/api/directions/json?";
private static final String GOOGLE_API_KEY = "key";
private DirectionJsonListener listener;
private String origin;
private String destination;
public DirectionJsonParser(DirectionJsonListener listener, String origin, String destination) {
this.listener = listener;
this.origin = origin;
this.destination = destination;
}
public void execute() throws UnsupportedEncodingException {
listener.onDirectionFinderStart();
new DownloadRawData().execute(createUrl());
}
private String createUrl() throws UnsupportedEncodingException {
String urlOrigin = URLEncoder.encode(origin, "utf-8");
String urlDestination = URLEncoder.encode(destination, "utf-8");
return DIRECTION_URL_API + "origin=" + urlOrigin + "&destination=" + urlDestination + "&key=" + GOOGLE_API_KEY;
}
private class DownloadRawData extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
String link = params[0];
try {
URL url = new URL(link);
InputStream is = url.openConnection().getInputStream();
StringBuffer buffer = new StringBuffer();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String line;
while ((line = reader.readLine()) != null) {
buffer.append(line + "\n");
}
return buffer.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String res) {
try {
parseJSon(res);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
private void parseJSon(String data) throws JSONException {
if (data == null)
return;
List<Route> routes = new ArrayList<Route>();
JSONObject jsonData = new JSONObject(data);
JSONArray jsonRoutes = jsonData.getJSONArray("routes");
for (int i = 0; i < jsonRoutes.length(); i++) {
JSONObject jsonRoute = jsonRoutes.getJSONObject(i);
Route route = new Route();
JSONObject overview_polylineJson = jsonRoute.getJSONObject("overview_polyline");
JSONArray jsonLegs = jsonRoute.getJSONArray("legs");
JSONObject jsonLeg = jsonLegs.getJSONObject(0);
JSONObject jsonDistance = jsonLeg.getJSONObject("distance");
JSONObject jsonDuration = jsonLeg.getJSONObject("duration");
JSONObject jsonEndLocation = jsonLeg.getJSONObject("end_location");
JSONObject jsonStartLocation = jsonLeg.getJSONObject("start_location");
route.distance = new Distance(jsonDistance.getString("text"), jsonDistance.getInt("value"));
route.duration = new Duration(jsonDuration.getString("text"), jsonDuration.getInt("value"));
route.endAddress = jsonLeg.getString("end_address");
route.startAddress = jsonLeg.getString("start_address");
route.startLocation = new LatLng(jsonStartLocation.getDouble("lat"), jsonStartLocation.getDouble("lng"));
route.endLocation = new LatLng(jsonEndLocation.getDouble("lat"), jsonEndLocation.getDouble("lng"));
route.points = decodePolyLine(overview_polylineJson.getString("points"));
routes.add(route);
}
listener.onDirectionFinderSuccess(routes);
}
private List<LatLng> decodePolyLine(final String poly) {
int len = poly.length();
int index = 0;
List<LatLng> decoded = new ArrayList<LatLng>();
int lat = 0;
int lng = 0;
while (index < len) {
int b;
int shift = 0;
int result = 0;
do {
b = poly.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do {
b = poly.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lng += dlng;
decoded.add(new LatLng(
lat/100000d, lng/100000d
));
}
return decoded;
}
}