这是我的代码。它只会在大多数时间内显示没有更新位置的地图，但令人惊讶的是它确实会显示更新的位置地图
public class CarteClient extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener {
private GoogleMap mMap;
GoogleApiClient Gac;
Location Local;
LocationRequest demLocal;
private Button déco, demT;
private LatLng positionClient;
//Gac=Google Api Client
//demLocal=demande de localisation
//déco=déconnexion
//demT=demande Toleka
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_carte_client);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
déco=(Button)findViewById(R.id.déconnexion);
demT=(Button)findViewById(R.id.demtoleka);
déco.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FirebaseAuth.getInstance().signOut();
Intent i= new Intent(CarteClient.this,SecondActivity.class);
startActivity(i);
finish();
return;
}
});
demT.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String IdUtil= FirebaseAuth.getInstance().getCurrentUser().getUid();
DatabaseReference réfbd= FirebaseDatabase.getInstance().getReference("DemandeClient");
GeoFire geoFire= new GeoFire(réfbd);
geoFire.setLocation(IdUtil, new GeoLocation(Local.getLatitude(), Local.getLongitude()));
positionClient=new LatLng(Local.getLatitude(), Local.getLongitude());
mMap.addMarker(new MarkerOptions().position(positionClient).title("Client par Ici"));
demT.setText("Contact avec le chauffeur en cours...");
//réfbd=référence base de données
//IdUtil= Identité Utilisateur
}
});
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in Sydney and move the camera
buildGoogleApiClient();
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
mMap.setMyLocationEnabled(true);
}
protected synchronized void buildGoogleApiClient() {
Gac=new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
Gac.connect();
}
@Override
public void onLocationChanged(Location location) {
Local=location;
LatLng latlon= new LatLng(location.getLatitude(), location.getLongitude());
mMap.moveCamera(CameraUpdateFactory.newLatLng(latlon));
mMap.animateCamera(CameraUpdateFactory.zoomTo(11));
}
@Override
public void onConnected(@Nullable Bundle bundle) {
demLocal = new LocationRequest();
demLocal.setInterval(1000);
demLocal.setFastestInterval(1000);
demLocal.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(Gac, demLocal, this);
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
@Override
protected void onStop(){
super.onStop();
}
}
答案 0 :(得分：0)
public class MainActivity1 extends Activity
implements ConnectionCallbacks,OnConnectionFailedListener {
private static final String TAG = MainActivity.class.getSimpleName();
private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 1000;
private Location mLastLocation;
// Google client to interact with Google API
private GoogleApiClient mGoogleApiClient;
// boolean flag to toggle periodic location updates
private boolean mRequestingLocationUpdates = false;
private LocationRequest mLocationRequest;
// Location updates intervals in sec
private static int UPDATE_INTERVAL = 10000; // 10 sec
private static int FATEST_INTERVAL = 5000; // 5 sec
private static int DISPLACEMENT = 10; // 10 meters
// UI elements
private TextView lblLocation;
private Button btnShowLocation, btnStartLocationUpdates;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lblLocation = (TextView) findViewById(R.id.lblLocation);
btnShowLocation = (Button) findViewById(R.id.btnShowLocation);
btnStartLocationUpdates = (Button) findViewById(R.id.btnLocationUpdates);
// First we need to check availability of play services
if (checkPlayServices()) {
// Building the GoogleApi client
buildGoogleApiClient();
}
// Show location button click listener
btnShowLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
displayLocation();
}
});
}
/**
* Method to display the location on UI
* */
private void displayLocation() {
mLastLocation = LocationServices.FusedLocationApi
.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
double latitude = mLastLocation.getLatitude();
double longitude = mLastLocation.getLongitude();
lblLocation.setText(latitude + ", " + longitude);
} else {
lblLocation
.setText("(Couldn't get the location. Make sure location is enabled on the device)");
}
}
/**
* Creating google api client object
* */
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
}
/**
* Method to verify google play services on the device
* */
private boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
PLAY_SERVICES_RESOLUTION_REQUEST).show();
} else {
Toast.makeText(getApplicationContext(),
"This device is not supported.", Toast.LENGTH_LONG)
.show();
finish();
}
return false;
}
return true;
}
@Override
protected void onStart() {
super.onStart();
if (mGoogleApiClient != null) {
mGoogleApiClient.connect();
}
}
@Override
protected void onResume() {
super.onResume();
checkPlayServices();
}
/**
* Google api callback methods
*/
@Override
public void onConnectionFailed(ConnectionResult result) {
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = "
+ result.getErrorCode());
}
@Override
public void onConnected(Bundle arg0) {
// Once connected with google api, get the location
displayLocation();
}
@Override
public void onConnectionSuspended(int arg0) {
mGoogleApiClient.connect();
}
}
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