Comment zoomer automatiquement sur l'emplacement actuel dans l'API Google Maps pour Android?
J'ai intégré l'API Google Maps dans Android Studio, et il trouve également l'emplacement actuel, mais je souhaite augmenter le niveau de zoom, afin de pouvoir visualiser mon emplacement actuel plus clairement et plus précisément. Comment augmenter le niveau de zoom?
Vous pouvez trouver mon code ci-dessous:
package com.example.umar.testgoogle;
import Android.location.Location;
import Android.content.IntentSender;
import Android.location.Location;
import Android.os.Bundle;
import Android.support.v4.app.FragmentActivity;
import Android.util.Log;
import com.google.Android.gms.common.ConnectionResult;
import com.google.Android.gms.common.api.GoogleApiClient;
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.LatLng;
import com.google.Android.gms.maps.model.MarkerOptions;
public class MapsActivity extends FragmentActivity implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
public static final String TAG = MapsActivity.class.getSimpleName();
/*
* Define a request code to send to Google Play services
* This code is returned in Activity.onActivityResult
*/
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
private GoogleMap mMap; // Might be null if Google Play services APK is
// not available.
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
setUpMapIfNeeded();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
// Create the LocationRequest object
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(10 * 1000) // 10 seconds, in milliseconds
.setFastestInterval(1 * 1000); // 1 second, in milliseconds
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
mGoogleApiClient.connect();
}
@Override
protected void onPause() {
super.onPause();
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
mGoogleApiClient.disconnect();
}
}
/**
* Sets up the map if it is possible to do so (i.e., the Google Play
* services APK is correctly installed) and the map has not already
* been instantiated.. This will ensure that we only ever call
* {@link #setUpMap()} once when {@link #mMap} is not null.
* <p/>
* If it isn't installed {@link SupportMapFragment} (and
* {@link com.google.Android.gms.maps.MapView MapView}) will show a
* Prompt for the user to install/update the Google Play services
* APK on their device.
* <p/>
* A user can return to this FragmentActivity after following the
* Prompt and correctly installing/updating/enabling the Google
* Play services. Since the FragmentActivity may not have been
* completely destroyed during this process (it is likely that it
* would only be stopped or paused), {@link #onCreate(Bundle)} may
* not be called again so we should call this method in
* {@link #onResume()} to guarantee that it will be called.
*/
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
/**
* This is where we can add markers or lines, add listeners or move
* the camera. In this case, we just add a marker near Africa.
* <p/>
* This should only be called once and when we are sure
* that {@link #mMap} is not null.
*/
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
private void handleNewLocation(Location location) {
Log.d(TAG, location.toString());
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
LatLng latLng = new LatLng(currentLatitude, currentLongitude);
//mMap.addMarker(new MarkerOptions().position(new LatLng(currentLatitude, currentLongitude)).title("Current Location"));
MarkerOptions options = new MarkerOptions()
.position(latLng)
.title("I am here!");
mMap.addMarker(options);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
}
@Override
public void onConnected(Bundle bundle) {
Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (location == null) {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
else {
handleNewLocation(location);
}
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
/*
* Google Play services can resolve some errors it detects.
* If the error has a resolution, try sending an Intent to
* start a Google Play services activity that can resolve
* error.
*/
if (connectionResult.hasResolution()) {
try {
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(
this, CONNECTION_FAILURE_RESOLUTION_REQUEST);
/*
* Thrown if Google Play services canceled the original
* PendingIntent
*/
}
catch (IntentSender.SendIntentException e) {
// Log the error
e.printStackTrace();
}
}
else {
/*
* If no resolution is available, display a dialog to the
* user with the error.
*/
Log.i(TAG, "Location services connection failed with code " +
connectionResult.getErrorCode());
}
}
@Override
public void onLocationChanged(Location location) {
handleNewLocation(location);
}
}
Changer de:
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
à:
float zoomLevel = 16.0f; //This goes up to 21
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, zoomLevel));
CameraUpdate statique public newLatLngZoom (LatLng latLng, zoom flottant)
Renvoie une CameraUpdate qui déplace le centre de l'écran à une latitude et une longitude spécifiées par un objet LatLng et se déplace au niveau de zoom donné.
Paramètres latLng un objet LatLng contenant la latitude et la longitude souhaitées. effectuez un zoom sur le niveau de zoom souhaité, compris entre 2,0 et 21,0. Les valeurs inférieures à cette plage sont définies sur 2,0 et les valeurs supérieures à 21,0. Augmentez la valeur pour effectuer un zoom avant. Toutes les zones n'ont pas de mosaïques aux niveaux de zoom les plus élevés. Renvoie une CameraUpdate contenant la transformation.
ou vous pouvez également utiliser la méthode animateCamerma pour obtenir un effet de zoom animé.
// This is method returns the lastKnownlocation and store it in location object from where then you can retrive latitute and longitude.
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 20.0f));