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JSON에서 Map Marker를 MapActivity로 가져 오려고합니다. JSON에서 첫 번째 정보를 얻습니다. 다른 정보는 내지도에 표시되지 않습니다. 내 문제를 어떻게 해결할 수 있습니까? 여기 내지도 활동입니다 :그냥 하나의 DataObject를 JSON에서 수신
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private ProgressDialog pDialog;
private GoogleMap mMap;
private static String url="http://partypeople.bplaced.net/markers.json";
ArrayList<HashMap<String, String>> contactList;
private String TAG = MainActivity.class.getSimpleName();
double latitude;
double longitude;
String namec;
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Override
protected void onCreate(Bundle savedInstanceState) {
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
contactList = new ArrayList<>();
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map3);
mapFragment.getMapAsync(this);
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
JSONArray contacts = jsonObj.getJSONArray("markers");
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("id");
String name = c.getString("name");
String address = c.getString("address");
String lat = c.getString("lat");
String lng = c.getString("lng");
// tmp hash map for single contact
HashMap<String, String> contact = new HashMap<>();
// adding each child node to HashMap key => value
contact.put("id", id);
contact.put("name", name);
contact.put("address",address);
contact.put("lat", lat);
contact.put("lng", lng);
latitude = Double.parseDouble(lat); longitude = Double.parseDouble(lng);
contactList.add(contact);
namec = name;
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG)
.show();
}
});
}
} else {
Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG)
.show();
}
});
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
LatLng P1 = new LatLng(latitude, longitude);
mMap.addMarker(new MarkerOptions().position(P1).title(namec));
mMap.moveCamera(CameraUpdateFactory.newLatLng(P1));
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
new GetContacts().execute();
mMap.setMyLocationEnabled(true);
}
}
여기 내 JSON입니다 :
{
"markers": [
{
"id": "c201",
"name": "Munic",
"address": "try",
"lat": "48.142281",
"lng" : "11.550613"
},
{
"id": "c205",
"name": "Berlin",
"address": "test",
"lat": "43.142281",
"lng" : "11.550613"
}
] }
여기 내 HttpHandler를 수 있습니다 : 공공
HttpHandler 클래스 {
01 23,516,private static final String TAG = HttpHandler.class.getSimpleName();
public HttpHandler() {
}
public String makeServiceCall(String reqUrl) {
String response = null;
try {
URL url = new URL(reqUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
// read the response
InputStream in = new BufferedInputStream(conn.getInputStream());
response = convertStreamToString(in);
} catch (MalformedURLException e) {
Log.e(TAG, "MalformedURLException: " + e.getMessage());
} catch (ProtocolException e) {
Log.e(TAG, "ProtocolException: " + e.getMessage());
} catch (IOException e) {
Log.e(TAG, "IOException: " + e.getMessage());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
return response;
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line;
try {
while ((line = reader.readLine()) != null) {
sb.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
} 귀하의 문제가 onPostExecute에
내가 그것을 시도했지만 실행 나던, 표시 한 마커가 –
죄송합니다, 나는 SECON 실수를했다 지금은 잘 작동 :) –