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Google Maps API V2: GPS icon not showing

In my application, I recently updated Google Maps from V1 to V2. Now that HTC One S (Android 4.1.1), when I turn on the GPS and enter the map activity, the application recognizes that the GPS is on, but its icon is not displayed and the application cannot find my location. <sh> On devices such as Samsung Galaxy Y (Android 2.3), the card works without problems.
On others, such as Samsung Galaxy S2 (Android 4.1.2), HTC Wildfire (Android 2.3), the GPS icon is not displayed, but applications find my location.
Where am I mistaken?

Grade:

public class CercaPuntoVendita extends FragmentActivity implements OnMarkerClickListener, LocationSource, LocationListener { // Identificatore del messaggio della Map private final static int MAP_MESSAGE_ID = 1; // Identificatore della ProgressBar private final static int PROGRESS_DIALOG_ID = 1; // Riferimento alla Map private GoogleMap map; // Riferimento alle UiSettings private UiSettings uis; // Riferimento al GeoCoder private Geocoder geocoder; // Riferimento alla EditText private EditText inputName; // Livello di Zoom private int nMetriDiametroCitta = 10000; private int nMetriDiametroVia = 1500; //Riferimento al MapController public static MapController mapController; //Otteniamo il riferimento al LocationManager private LocationManager myLocationManager = null; private OnLocationChangedListener myLocationListener = null; private Criteria myCriteria; private PuntiVendita overlays = null; private Context ctx = this; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Mettiamo la View a tutto schermo requestWindowFeature(Window.FEATURE_NO_TITLE); // Visualizziamo la Map setContentView(R.layout.cerca_punto_vendita); // Gestione font Button btnSearch = (Button) findViewById(R.id.searchButton); Typeface tf = Typeface.createFromAsset(ctx.getAssets(), "fonts/CRAI_regular.ttf"); Utils.setFontMultiple(tf, btnSearch); // Set up della map setUpMapIfNeeded(); // Riferimento al campo di testo inputName = (EditText)findViewById(R.id.addressName); // Otteniamo il riferimento al geocoder geocoder = new Geocoder(this,Locale.ITALY); // Otteniamo il riferimento al location manager myLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); // Verifichiamo se il GPS è abilitato altrimenti avvisiamo l'utente if(!myLocationManager.isProviderEnabled("gps")) { Utils.showWarningDialog(this, "GPS è attualmente disabilitato. E' possibile abilitarlo dal menu impostazioni."); } // muovo la mappa su Roma map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(41.893, 12.482), calculateZoomLevel(nMetriDiametroCitta))); } @Override public void onPause() { super.onPause(); map.setLocationSource(null); myLocationManager.removeUpdates(this); } @Override protected void onResume() { super.onResume(); setUpMapIfNeeded(); map.setMyLocationEnabled(true); uis = map.getUiSettings(); uis.setMyLocationButtonEnabled(false); myCriteria = new Criteria(); myCriteria.setAccuracy(Criteria.ACCURACY_COARSE); myLocationManager = (LocationManager)getSystemService(LOCATION_SERVICE); // Verifichiamo se il GPS è abilitato altrimenti avvisiamo l'utente if(myLocationManager.isProviderEnabled("gps")) { try { Location loc = myLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(loc.getLatitude(), loc.getLongitude()), calculateZoomLevel(nMetriDiametroVia))); } catch (NullPointerException e) { } //Register for location updates using a Criteria, and a callback on the specified looper thread. myLocationManager.requestLocationUpdates( 0L, //minTime 0.0f, //minDistance myCriteria, //criteria this, //listener null); //looper //Replaces the location source of the my-location layer. map.setLocationSource(this); } //myLocationManager.getProviders(true); } public static double getRound(double x, int digits){ double powerOfTen = Math.pow(10, digits); return (Math.round(x * powerOfTen) / powerOfTen); } /** * Permette di iniziare la ricerca * * @param button * Riferimento al button */ public void searchPlace(View button) { hideSoftInput(); Thread searchThread = new Thread("SearchThread") { @Override public void run() { // Otteniamo il messaggio Message message = mapHandler.obtainMessage(); // Utilizziamo il Geocoder per fare la ricerca try { List<Address> risultati = geocoder.getFromLocationName(inputName.getText().toString().trim(), 1); // Se c'e' qualcosa lo notifichiamo if (risultati != null && risultati.size() > 0) { message.obj = risultati.get(0); mapHandler.sendMessage(message); } else { runOnUiThread(new Runnable() { public void run() { Utils.msg(CercaPuntoVendita.this, "Nessun risultato trovato"); } }); } } catch (IOException e) { // Non facciamo nulla ma arriva il messaggio vuoto mapHandler.sendEmptyMessage(MAP_MESSAGE_ID); } finally { dismissDialog(PROGRESS_DIALOG_ID); } } }; // Visualizziamo la progressDialog showDialog(PROGRESS_DIALOG_ID); // Facciamo partire il Thread searchThread.start(); } private final Handler mapHandler = new Handler() { @Override public void handleMessage(Message msg) { // Si ottengono le informazioni se presenti sulla posizione if (msg != null && msg.obj != null) { // Estraiamo le informazioni di posizione try { Address address = (Address)msg.obj; Log.d("CercaPuntoVendita.this", "" + address.getLocality()); GeoPoint pointToGo = new GeoPoint((int)(address.getLatitude()*1000000),(int)(address.getLongitude()*1000000)); float dZoom = 0; if (address.getLocality().equalsIgnoreCase(inputName.getText().toString().trim())) { // se la locality è uguale alla stringa di ricerca, si tratta di una citta' dZoom = calculateZoomLevel(nMetriDiametroCitta); } else { dZoom = calculateZoomLevel(nMetriDiametroVia); } map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(address.getLatitude(), address.getLongitude()), dZoom)); } catch (NullPointerException ex) { Utils.msg(CercaPuntoVendita.this, "Nessun risultato trovato"); Log.w("Punti Vendita - Cerca", (ex.getMessage() == null)?"address = null":ex.getMessage()); } } else { Utils.msg(CercaPuntoVendita.this, "Nessun risultato trovato"); } Log.i("GEOCODER", "" + msg); if (msg != null) { Log.i("GEOCODER", "" + msg.obj); } } }; @Override protected Dialog onCreateDialog(int id) { switch (id) { case PROGRESS_DIALOG_ID: ProgressDialog progressDialog = new ProgressDialog(this, ProgressDialog.STYLE_SPINNER); progressDialog.setIndeterminate(true); progressDialog.setTitle("Cerca Punti Vendita"); progressDialog.setMessage("Cercando..."); return progressDialog; default: return null; } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Menù di gestione modalità di visualizzazione che, per renderle checkable le inseriamo in un sottomenu SubMenu mapSubMenu = menu.addSubMenu("Modalità Mappa"); mapSubMenu.setIcon(android.R.drawable.ic_menu_mapmode); int firstItem = Menu.FIRST; MenuItem trafficItem = mapSubMenu.add(1, firstItem, firstItem, "Traffic"); trafficItem.setCheckable(true); trafficItem.setChecked(false); MenuItem satelliteItem = mapSubMenu.add(1, firstItem + 1, firstItem + 1, "Satellite"); satelliteItem.setCheckable(true); trafficItem.setChecked(false); // Visualizziamo il menu return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Modifichiamo lo stato di quella selezionata item.setChecked(!item.isChecked()); // Abilitiamo o meno l'opzione relativa switch (item.getItemId()) { case Menu.FIRST: map.setTrafficEnabled(item.isChecked()); break; case Menu.FIRST + 1: if (item.isChecked()) map.setMapType(MAP_TYPE_SATELLITE); else map.setMapType(MAP_TYPE_NORMAL); break; } return super.onOptionsItemSelected(item); } protected boolean isRouteDisplayed() { return false; } private void hideSoftInput() { InputMethodManager inputManager = (InputMethodManager) CercaPuntoVendita.this.getSystemService(Context.INPUT_METHOD_SERVICE); inputManager.hideSoftInputFromWindow(CercaPuntoVendita.this.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); } public boolean onMarkerClick(Marker mrk) { final ProgressDialog progressDialog = ProgressDialog.show(ctx, "", "Caricamento in corso.\nAttendere prego..."); final String sSnippet = mrk.getSnippet(); new Thread() { @Override public void run() { try { sleep(100); } catch (Exception e) { e.printStackTrace(); } Intent intent = new Intent(ctx, PuntoVenditaDett.class); intent.putExtra("myPdvId", sSnippet); ctx.startActivity(intent); progressDialog.dismiss(); } }.start(); return true; } private void setUpMap() { // Gestiamo gli Overlay Drawable starImg = getResources().getDrawable(R.drawable.logominicrai); if (overlays == null) overlays = new PuntiVendita(starImg, this); map.setOnMarkerClickListener(this); for (int i=0; i < overlays.size(); i++) { LatLng llPunto = new LatLng(overlays.getItem(i).getPoint().getLatitudeE6()/1E6, overlays.getItem(i).getPoint().getLongitudeE6()/1E6); map.addMarker(new MarkerOptions() .position(llPunto) //.title(name) .snippet(overlays.getItem(i).getSnippet()) .icon(BitmapDescriptorFactory .fromResource(R.drawable.logominicrai))); } } private void setUpMapIfNeeded() { // Do a null check to confirm that we have not already instantiated the map. if (map == null) { // Try to obtain the map from the SupportMapFragment. map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap(); // Check if we were successful in obtaining the map. if (map != null) { setUpMap(); } } } public void onLocationChanged(Location location) { if (myLocationListener != null) { myLocationListener.onLocationChanged(location); LatLng latlng = new LatLng(location.getLatitude(), location.getLongitude()); map.animateCamera(CameraUpdateFactory.newLatLng(latlng)); } } public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub } public void activate(OnLocationChangedListener listener) { myLocationListener = listener; } public void deactivate() { myLocationListener = null; } }

Manifesto:

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.gmaps" android:versionCode="2" android:versionName="2" > <uses-sdk android:minSdkVersion="9" /> <!-- Google Maps API V2 --> <permission android:name="com.example.gmaps.permission.MAPS_RECEIVE" android:protectionLevel="signature" /> <uses-feature android:glEsVersion="0x00020000" android:required="true" /> <uses-permission android:name="com.example.gmaps.permission.MAPS_RECEIVE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.VIBRATE" /> <uses-permission android:name="android.permission.FLASHLIGHT" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.CALL_PHONE" /> <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <application android:allowBackup="true" android:icon="@drawable/icon" android:label="@string/app_name" > <activity android:name="com.fedrasoft.craiinforma.App" android:configChanges="orientation|keyboardHidden|keyboard" android:screenOrientation="portrait" android:launchMode="singleTask" > <!-- android:alwaysRetainTaskState="true" --> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="com.fedrasoft.craiinforma.CercaPuntoVendita" android:label="@string/title_activity_cerca_punto_vendita" android:screenOrientation="portrait" > <intent-filter> <action android:name="CercaPuntoVendita" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> <uses-library android:name="com.google.android.maps" /> <!-- Google Maps API V2 --> <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="my key" /> </application> </manifest>
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2 answers

Following @Nevermore's advice, I solved the problem with implementing OnMyLocationChangeListener instead of LocationSource and LocationListener.
I changed the code as follows:

 public class CercaPuntoVendita extends FragmentActivity implements OnMarkerClickListener, OnMyLocationChangeListener { //... public void onMyLocationChange(Location location) { mMap.animateCamera( CameraUpdateFactory.newLatLng( new LatLng(location.getLatitude(), location.getLongitude()))); } }
+2
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I found that this problem depends on the instruction:

 map.setLocationSource(this);

If I don’t use it, GPS is working fine, but it cannot "follow" my location. I have to put this manual so that it can always set the location source, even when I turn on the GPS on the fly ...

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Source: https://habr.com/ru/post/1484567/

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