Cómo dibujar la ruta mientras me muevo desde mi ubicación actual usando Google Maps

Estoy tratando de dibujar la ruta como me muevo desde mi ubicación actual. Estoy enfrentando un gran problema en dibujar la ruta dinámicamente por favor ayúdame a resolverlo. Estoy teniendo marcador en mi ubicación actual en mi mapa. Tan pronto como empiece a mover quiero que el mapa para empezar a dibujar líneas en el camino que me muevo. No tengo dos puntos fijos. ¿Puede alguien por favor me proporciona una solución para más de venir esto. He visto muchas respuestas en SO que dibuja el camino entre dos puntos fijos. Pero aquí sólo mi punto inicial es fijo. Puedo obtener mi ubicación actual en mi aplicación actualmente. He intentado con el siguiente código, pero getLocationManager () está resultando en error. Estoy usando Android Studio.

Código actualizado:

Mi actividad:

import android.content.Context; import android.content.SharedPreferences; import android.location.Address; import android.location.Geocoder; import android.location.Location; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.util.Log; import android.util.Xml; import android.widget.TextView; import android.widget.Toast; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GooglePlayServicesUtil; import com.google.android.gms.common.api.GoogleApiClient; import com.google.android.gms.common.api.PendingResult; import com.google.android.gms.common.api.Status; import com.google.android.gms.location.LocationListener; import com.google.android.gms.location.LocationRequest; import com.google.android.gms.location.LocationServices; import com.google.android.gms.maps.CameraUpdateFactory; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.SupportMapFragment; import com.google.android.gms.maps.model.BitmapDescriptorFactory; import com.google.android.gms.maps.model.LatLng; import com.google.android.gms.maps.model.Marker; import com.google.android.gms.maps.model.MarkerOptions; import com.google.maps.android.ui.IconGenerator; import org.xmlpull.v1.XmlSerializer; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.StringWriter; import java.text.DateFormat; import java.util.Calendar; import java.util.Date; import java.util.List; import java.util.Locale; public class MainActivity extends FragmentActivity implements LocationListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener { private static final String TAG = "MainActivity"; private static final long INTERVAL = 1000 * 60 * 1; //1 minute private static final long FASTEST_INTERVAL = 1000 * 60 * 1; // 1 minute private LocationRequest mLocationRequest; private GoogleApiClient mGoogleApiClient; private Location mCurrentLocation; private String mLastUpdateTime; private String city = ""; private String country = ""; private String area = ""; private String title; private String requiredArea = ""; private GoogleMap googleMap; private List<Address> addresses; protected void createLocationRequest() { mLocationRequest = new LocationRequest(); mLocationRequest.setInterval(INTERVAL); mLocationRequest.setFastestInterval(FASTEST_INTERVAL); mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.d(TAG, "onCreate ..............................."); //show error dialog if GoolglePlayServices not available if (!isGooglePlayServicesAvailable()) { Toast.makeText(this, "Google Play Services is not available", Toast.LENGTH_LONG).show(); finish(); } createLocationRequest(); mGoogleApiClient = new GoogleApiClient.Builder(this) .addApi(LocationServices.API) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .build(); setContentView(R.layout.activity_main); SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map); googleMap = fm.getMap(); googleMap.setMyLocationEnabled(true); googleMap.setOnMyLocationButtonClickListener(new GoogleMap.OnMyLocationButtonClickListener() { @Override public boolean onMyLocationButtonClick() { Toast.makeText(getApplicationContext(), "Location button has been clicked", Toast.LENGTH_LONG).show(); return true; } }); googleMap.getUiSettings().setZoomControlsEnabled(true); googleMap.getUiSettings().setAllGesturesEnabled(true); } @Override public void onStart() { super.onStart(); Log.d(TAG, "onStart fired .............."); mGoogleApiClient.connect(); } @Override public void onStop() { super.onStop(); Log.d(TAG, "onStop fired .............."); mGoogleApiClient.disconnect(); Log.d(TAG, "isConnected ...............: " + mGoogleApiClient.isConnected()); } private boolean isGooglePlayServicesAvailable() { int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this); if (ConnectionResult.SUCCESS == status) { return true; } else { GooglePlayServicesUtil.getErrorDialog(status, this, 0).show(); Toast.makeText(getApplicationContext(), "Google Play Services is not Available", Toast.LENGTH_LONG).show(); return false; } } @Override public void onConnected(Bundle bundle) { Log.d(TAG, "onConnected - isConnected ...............: " + mGoogleApiClient.isConnected()); startLocationUpdates(); } protected void startLocationUpdates() { PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates( mGoogleApiClient, mLocationRequest, this); Log.d(TAG, "Location update started ..............: "); } @Override public void onConnectionSuspended(int i) { } @Override public void onConnectionFailed(ConnectionResult connectionResult) { Log.d(TAG, "Connection failed: " + connectionResult.toString()); } @Override public void onLocationChanged(Location location) { Log.d(TAG, "Firing onLocationChanged.............................................."); mCurrentLocation = location; mLastUpdateTime = DateFormat.getTimeInstance().format(new Date()); addMarker(); float accuracy = location.getAccuracy(); Log.d("iFocus", "The amount of accuracy is " + accuracy); double latitude = location.getLatitude(); double longitude = location.getLongitude(); Bundle extras = location.getExtras(); Boolean has = location.hasAccuracy(); String provider = location.getProvider(); Long time = location.getTime(); // Location locationB = new Location("Begur"); // double lati = 12.8723; // double longi = 77.6329; // locationB.setLatitude(lati); // locationB.setLongitude(longi); // Float distance = location.distanceTo(locationB); Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(time); int mYear = calendar.get(Calendar.YEAR); int mMonth = calendar.get(Calendar.MONTH) + 1; int mDay = calendar.get(Calendar.DAY_OF_MONTH); String formattedTime = mDay + ":" + mMonth + ":" + mYear; Log.d("iFocus", "The name of provider is " + provider); Log.d("iFocus", "The value of has is " + has); Log.d("iFocus", "The value of extras is " + extras); Log.d("iFocus", "The value of Month is " + mMonth); Log.d("iFocus", "The value of Day is " + mDay); Log.d("iFocus", "The value of Year is " + mYear); Log.d("iFocus", "The value of Time is " + formattedTime); //Log.d("iFocus", "The value of distance is "+distance); LatLng latLng = new LatLng(latitude, longitude); Geocoder geocoder = new Geocoder(this, Locale.getDefault()); try { addresses = geocoder.getFromLocation(latitude, longitude, 1); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } String cityName = addresses.get(0).getAddressLine(0); String stateName = addresses.get(0).getAddressLine(1); String countryName = addresses.get(0).getAddressLine(2); String[] splittedStateName = stateName.split(","); requiredArea = splittedStateName[2]; Log.d("iFocus", "The value of required area is " + requiredArea); city = addresses.get(0).getLocality(); area = addresses.get(0).getSubLocality(); String adminArea = addresses.get(0).getAdminArea(); String premises = addresses.get(0).getPremises(); String subAdminArea = addresses.get(0).getSubAdminArea(); String featureName = addresses.get(0).getFeatureName(); String phone = addresses.get(0).getPhone(); country = addresses.get(0).getCountryName(); Log.d("iFocus", "The name of city is " + city); Log.d("iFocus", "The name of area is " + area); Log.d("iFocus", "The name of country is " + country); Log.d("iFocus", "The value of cityName is " + cityName); Log.d("iFocus", "The value of StateName is " + stateName); Log.d("iFocus", "The value of CountryName is " + countryName); Toast.makeText(this, cityName + " " + stateName + " " + countryName, Toast.LENGTH_LONG).show(); SharedPreferences sharedPreferences = getSharedPreferences("MyValues", MODE_PRIVATE); SharedPreferences.Editor editor = sharedPreferences.edit(); editor.putString("CITY", cityName); editor.putString("STATE", stateName); editor.putString("COUNTRY", countryName); editor.commit(); TextView mapTitle = (TextView) findViewById(R.id.textViewTitle); if (requiredArea != "" && city != "" && country != "") { title = mLastUpdateTime.concat(", " + requiredArea).concat(", " + city).concat(", " + country); } else { title = mLastUpdateTime.concat(", " + area).concat(", " + city).concat(", " + country); } mapTitle.setText(title); addMarker();// newly added final String xmlFile = "userData.xml"; try { // FileOutputStream fos = new FileOutputStream("userData.xml"); FileOutputStream fos = openFileOutput(xmlFile, Context.MODE_PRIVATE); XmlSerializer xmlSerializer = Xml.newSerializer(); StringWriter writer = new StringWriter(); xmlSerializer.setOutput(writer); xmlSerializer.startDocument("UTF-8", true); xmlSerializer.startTag(null, "userData"); xmlSerializer.startTag(null, "Time"); xmlSerializer.text(mLastUpdateTime); xmlSerializer.endTag(null, "Time"); xmlSerializer.startTag(null, "Area"); if (requiredArea != "") { xmlSerializer.text(requiredArea); } else { xmlSerializer.text(area); } xmlSerializer.endTag(null, "Area"); xmlSerializer.startTag(null, "City"); xmlSerializer.text(city); xmlSerializer.endTag(null, "City"); xmlSerializer.endTag(null, "userData"); xmlSerializer.endDocument(); xmlSerializer.flush(); String dataWrite = writer.toString(); fos.write(dataWrite.getBytes()); fos.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } String dir = getFilesDir().getAbsolutePath(); Log.d("Pana", "The value of Dir is "+dir); } private void addMarker() { MarkerOptions options = new MarkerOptions(); // following four lines requires 'Google Maps Android API Utility Library' // https://developers.google.com/maps/documentation/android/utility/ // I have used this to display the time as title for location markers // you can safely comment the following four lines but for this info IconGenerator iconFactory = new IconGenerator(this); iconFactory.setStyle(IconGenerator.STYLE_PURPLE); // options.icon(BitmapDescriptorFactory.fromBitmap(iconFactory.makeIcon(mLastUpdateTime + requiredArea + city))); options.icon(BitmapDescriptorFactory.fromBitmap(iconFactory.makeIcon(requiredArea + ", " + city))); options.anchor(iconFactory.getAnchorU(), iconFactory.getAnchorV()); LatLng currentLatLng = new LatLng(mCurrentLocation.getLatitude(), mCurrentLocation.getLongitude()); options.position(currentLatLng); Marker mapMarker = googleMap.addMarker(options); long atTime = mCurrentLocation.getTime(); mLastUpdateTime = DateFormat.getTimeInstance().format(new Date(atTime)); String title = mLastUpdateTime.concat(", " + requiredArea).concat(", " + city).concat(", " + country); mapMarker.setTitle(title); TextView mapTitle = (TextView) findViewById(R.id.textViewTitle); mapTitle.setText(title); Log.d(TAG, "Marker added............................."); googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(currentLatLng, 13)); Log.d(TAG, "Zoom done............................."); } @Override protected void onPause() { super.onPause(); stopLocationUpdates(); } protected void stopLocationUpdates() { LocationServices.FusedLocationApi.removeLocationUpdates( mGoogleApiClient, this); Log.d(TAG, "Location update stopped ......................."); } @Override public void onResume() { super.onResume(); if (mGoogleApiClient.isConnected()) { startLocationUpdates(); Log.d(TAG, "Location update resumed ....................."); } } }

Estoy intentando agregar este método en mi código para dibujar la línea pero su error que da en getLocationManager ();

  private void addLocationListener(LocationListener locationListener) { LocationProvider locationProvider = getLocationManager().getProvider(LocationManager.GPS_PROVIDER); getLocationManager().requestLocationUpdates(locationProvider.getName(), LOCATION_UPDATE_INTERVAL, LOCATION_UPDATE_MIN_DISTANCE, locationListener); } private LocationManager getLocationManager() { return (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); } private void startGpsListening(Location start) { this.startLocation = start; addLocationListener(new MyLocationListener()); } private Location startLocation = new Location(""); private class MyLocationListener extends LocationListener { public void onLocationChanged(Location location) { } ... }

Parece que la mejor implementación sería simplemente usar un ArrayList<LatLng> para almacenar cada punto dado en onLocationChanged() . Luego, cada vez que obtenga un nuevo punto, vuelva a dibujar la línea.

Primero, importa lo que necesitas para dibujar las líneas:

 import com.google.android.gms.maps.model.Polyline; import com.google.android.gms.maps.model.PolylineOptions;

Crear variables de miembro para la ArrayList y la polilínea:

 private ArrayList<LatLng> points; //added Polyline line; //added

Inicializar points en onCreate() :

 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); points = new ArrayList<LatLng>(); //added //...............

A continuación, en onLocationChanged() , agregue cada punto que obtenga al ArrayList:

 @Override public void onLocationChanged(Location location) { double latitude = location.getLatitude(); double longitude = location.getLongitude(); LatLng latLng = new LatLng(latitude, longitude); //you already have this points.add(latLng); //added redrawLine(); //added }

Tomando de esta respuesta , defina su método redrawLine() .
Elimina todas las demás llamadas a addMarker() , ya que addMarker() clear() en tu mapa, lo que eliminará todos los marcadores y polilíneas.

 private void redrawLine(){ googleMap.clear(); //clears all Markers and Polylines PolylineOptions options = new PolylineOptions().width(5).color(Color.BLUE).geodesic(true); for (int i = 0; i < points.size(); i++) { LatLng point = points.get(i); options.add(point); } addMarker(); //add Marker in current position line = googleMap.addPolyline(options); //add Polyline }

Editar: También es probable que desee marcar en la distancia mínima en metros entre devoluciones de llamada de ubicación cambiado.

 private static final String TAG = "MainActivity"; private static final long INTERVAL = 1000 * 60 * 1; //1 minute private static final long FASTEST_INTERVAL = 1000 * 60 * 1; // 1 minute private static final float SMALLEST_DISPLACEMENT = 0.25F; //quarter of a meter

Llamada setSmallestDisplacement() :

 protected void createLocationRequest() { mLocationRequest = new LocationRequest(); mLocationRequest.setInterval(INTERVAL); mLocationRequest.setFastestInterval(FASTEST_INTERVAL); mLocationRequest.setSmallestDisplacement(SMALLEST_DISPLACEMENT); //added mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); }

Eso debería ser suficiente para empezar. Es posible que necesite afinar la frecuencia de las devoluciones de llamada de la ubicación para obtener el resultado deseado. Probablemente hay más que eso, pero puedes encontrar los casos de borde y arreglarlos después de las pruebas.

Sé que es bastante tarde para una respuesta, pero voy a publicar esto aquí para aquellos que todavía tienen el mismo problema.

Si desea mover un marcador o / y una Polilínea, no necesita quitar / borrar y dibujar de nuevo, en su lugar tiene que agregar PolylineOptions una vez y luego establecer los nuevos puntos después.

Ejemplo de código:

 boolean isPolyAdded = false;

Añadir esta línea del código:

 if (isPolyLoaded == false){ polyline = map.addPolyline(lineOptions); isPolyLoaded = true; }else{ polyline.setPoints(points); }

onPostExecute método onPostExecute

Código final:

  @Override protected void onPostExecute(List<List<HashMap<String, String>>> result) { // Traversing through all the routes for(int i=0;i<result.size();i++){ points = new ArrayList<LatLng>(); lineOptions = new PolylineOptions(); // Fetching i-th route List<HashMap<String, String>> path = result.get(i); // Fetching all the points in i-th route for(int j=0;j<path.size();j++){ HashMap<String,String> point = path.get(j); double lat = Double.parseDouble(point.get("lat")); double lng = Double.parseDouble(point.get("lng")); LatLng position = new LatLng(lat, lng); points.add(position); } // Adding all the points in the route to LineOptions lineOptions.addAll(points); lineOptions.width(7); lineOptions.color(Color.BLACK); } // Drawing polyline in the Google Map for the i-th route if (isPolyLoaded == false){ polyline = map.addPolyline(lineOptions); isPolyLoaded = true; }else{ polyline.setPoints(points); } } }