我有一个 geofencing 应用。我正在使用模拟位置来测试该应用。但是即使更改了位置，地图的 geofence 部分也只能在初始位置使用。即使使用模拟位置将地图更新为新位置，地理标记仍仅在我的当前位置中有效。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.geofenceactivity);
Button proceed=findViewById(R.id.btnpro);
rad=getIntent().getExtras().getString("radius");
rem=getIntent().getExtras().getString("reminder");
Toast.makeText(getApplicationContext(), rem, Toast.LENGTH_SHORT).show();
// ActionBar actionBar = getSupportActionBar();
// actionBar.setDisplayHomeAsUpEnabled(true);
// getSupportActionBar().setDisplayHomeAsUpEnabled(true);
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
textLat = findViewById(R.id.lat);
textLong = findViewById(R.id.lon);
// initialize GoogleMaps
initGMaps();
// create GoogleApiClient
createGoogleApi();
}
// Create GoogleApiClient instance
private void createGoogleApi() {
Log.d(TAG, "createGoogleApi()");
if ( googleApiClient == null ) {
googleApiClient = new GoogleApiClient.Builder( this )
.addConnectionCallbacks( this )
.addOnConnectionFailedListener( this )
.addApi( LocationServices.API )
.build();
}
}
@Override
protected void onStart() {
super.onStart();
// Call GoogleApiClient connection when starting the Activity
googleApiClient.connect();
}
@Override
protected void onStop() {
super.onStop();
// Disconnect GoogleApiClient when stopping Activity
googleApiClient.disconnect();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate( R.menu.main_menu, menu );
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch ( item.getItemId() ) {
case R.id.geofence: {
startGeofence();
return true;
}
case R.id.clear: {
clearGeofence();
return true;
}
}
return super.onOptionsItemSelected(item);
}
private final int REQ_PERMISSION = 999;
// Check for permission to access Locaton
private boolean checkPermission() {
Log.d(TAG, "checkPermission()");
// Ask for permission if it wasn't granted yet
return (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED );
}
// Asks for permission
private void askPermission() {
Log.d(TAG, "askPermission()");
ActivityCompat.requestPermissions(
this,
new String[] { Manifest.permission.ACCESS_FINE_LOCATION },
REQ_PERMISSION
);
}
// Verify user's response of the permission requested
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
Log.d(TAG, "onRequestPermissionsResult()");
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch ( requestCode ) {
case REQ_PERMISSION: {
if ( grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED ){
// Permission granted
getLastKnownLocation();
} else {
// Permission denied
permissionsDenied();
}
break;
}
}
}
// App cannot work without the permissions
private void permissionsDenied() {
Log.w(TAG, "permissionsDenied()");
// TODO close app and warn user
}
// Initialize GoogleMaps
private void initGMaps(){
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
// Callback called when Map is ready
@Override
public void onMapReady(GoogleMap googleMap) {
Log.d(TAG, "onMapReady()");
map = googleMap;
map.setOnMapClickListener(this);
map.setOnMarkerClickListener(this);
}
@Override
public void onMapClick(LatLng latLng) {
Log.d(TAG, "onMapClick("+latLng +")");
markerForGeofence(latLng);
}
@Override
public boolean onMarkerClick(Marker marker) {
Log.d(TAG, "onMarkerClickListener: " + marker.getPosition() );
return false;
}
private LocationRequest locationRequest;
// Defined in mili seconds.
// This number in extremely low, and should be used only for debug
private final int UPDATE_INTERVAL = 1000;
private final int FASTEST_INTERVAL = 900;
// Start location Updates
private void startLocationUpdates(){
Log.i(TAG, "startLocationUpdates()");
locationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
if ( checkPermission() )
LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);
}
@Override
public void onLocationChanged(Location location) {
Log.d(TAG, "onLocationChanged ["+location+"]");
lastLocation = location;
/* writeActualLocation(location);*/
}
// GoogleApiClient.ConnectionCallbacks connected
@Override
public void onConnected(@Nullable Bundle bundle) {
Log.i(TAG, "onConnected()");
getLastKnownLocation();
recoverGeofenceMarker();
}
// GoogleApiClient.ConnectionCallbacks suspended
@Override
public void onConnectionSuspended(int i) {
Log.w(TAG, "onConnectionSuspended()");
}
// GoogleApiClient.OnConnectionFailedListener fail
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Log.w(TAG, "onConnectionFailed()");
}
// Get last known location
private void getLastKnownLocation() {
Log.d(TAG, "getLastKnownLocation()");
if ( checkPermission() ) {
lastLocation = LocationServices.FusedLocationApi.getLastLocation(googleApiClient);
if ( lastLocation != null ) {
Log.i(TAG, "LasKnown location. " +
"Long: " + lastLocation.getLongitude() +
" | Lat: " + lastLocation.getLatitude());
writeLastLocation();
startLocationUpdates();
} else {
Log.w(TAG, "No location retrieved yet");
startLocationUpdates();
}
}
else askPermission();
}
private void writeActualLocation(Location location) {
textLat.setText( "Lat: " + location.getLatitude() );
textLong.setText( "Long: " + location.getLongitude() );
Geocoder gcd = new Geocoder(this, Locale.getDefault());
List<Address> addresses = null;
try {
addresses = gcd.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
if(addresses != null && addresses.size() > 0 ){
Address address = addresses.get(0);
String street = address.getThoroughfare();
/*Toast.makeText(getApplicationContext(),street,Toast.LENGTH_LONG).show();*/
}
} catch (IOException e) {
e.printStackTrace();
}
if (addresses != null && addresses.size() > 0) {
String locality = addresses.get(0).getLocality();
}
markerLocation(new LatLng(location.getLatitude(), location.getLongitude()));
}
private void writeLastLocation() {
writeActualLocation(lastLocation);
}
private Marker locationMarker;
private void markerLocation(LatLng latLng) {
Log.i(TAG, "markerLocation("+latLng+")");
String title = latLng.latitude + ", " + latLng.longitude;
MarkerOptions markerOptions = new MarkerOptions()
.position(latLng)
.title(title);
if ( map!=null ) {
if ( locationMarker != null )
locationMarker.remove();
locationMarker = map.addMarker(markerOptions);
float zoom = 17f;
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng, zoom);
map.animateCamera(cameraUpdate);
}
}
private Marker geoFenceMarker;
private void markerForGeofence(LatLng latLng) {
Log.i(TAG, "markerForGeofence("+latLng+")");
final double lati =latLng.latitude;
double lngi =latLng.longitude;
/*String s= getIntent().getExtras().getString("Reminder");*/
final String title = latLng.latitude + ", " + latLng.longitude;
// Define marker options
MarkerOptions markerOptions = new MarkerOptions()
.position(latLng)
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE))
.title(title);
if ( map!=null ) {
// Remove last geoFenceMarker
if (geoFenceMarker != null)
geoFenceMarker.remove();
geoFenceMarker = map.addMarker(markerOptions);
Geocoder gcd = new Geocoder(this, Locale.getDefault());
List<Address> addresses = null;
try {
addresses = gcd.getFromLocation(latLng.latitude, latLng.longitude, 1);
if(addresses != null && addresses.size() > 0 ){
Address address = addresses.get(0);
final String addr=addresses.get(0).getAddressLine(0);
String street1 = address.getThoroughfare();
// Start Geofence creation process
private void startGeofence() {
Log.i(TAG, "startGeofence()");
if( geoFenceMarker != null ) {
Geofence geofence = createGeofence( geoFenceMarker.getPosition(),Float.parseFloat(rad) );
GeofencingRequest geofenceRequest = createGeofenceRequest( geofence );
addGeofence( geofenceRequest );
} else {
Log.e(TAG, "Geofence marker is null");
}
}
private static final long GEO_DURATION = 60 * 60 * 1000;
private static final String GEOFENCE_REQ_ID = "My Geofence";
private static final float GEOFENCE_RADIUS = 100.0f; // in meters
// Create a Geofence
private Geofence createGeofence(LatLng latLng, float radius ) {
Log.d(TAG, "createGeofence");
return new Geofence.Builder()
.setRequestId(GEOFENCE_REQ_ID)
.setCircularRegion( latLng.latitude, latLng.longitude, radius)
.setExpirationDuration( GEO_DURATION )
.setTransitionTypes( Geofence.GEOFENCE_TRANSITION_ENTER
| Geofence.GEOFENCE_TRANSITION_EXIT )
.build();
}
// Create a Geofence Request
private GeofencingRequest createGeofenceRequest(Geofence geofence ) {
Log.d(TAG, "createGeofenceRequest");
return new GeofencingRequest.Builder()
.setInitialTrigger( GeofencingRequest.INITIAL_TRIGGER_ENTER )
.addGeofence( geofence )
.build();
}
private PendingIntent geoFencePendingIntent;
private final int GEOFENCE_REQ_CODE = 0;
private PendingIntent createGeofencePendingIntent() {
Log.d(TAG, "createGeofencePendingIntent");
if ( geoFencePendingIntent != null )
return geoFencePendingIntent;
Intent intent = new Intent( this, GeofenceTransitionService.class);
return PendingIntent.getService(
this, GEOFENCE_REQ_CODE, intent, PendingIntent.FLAG_UPDATE_CURRENT );
}
// Add the created GeofenceRequest to the device's monitoring list
private void addGeofence(GeofencingRequest request) {
Log.d(TAG, "addGeofence");
if (checkPermission())
LocationServices.GeofencingApi.addGeofences(
googleApiClient,
request,
createGeofencePendingIntent()
).setResultCallback(this);
}
@Override
public void onResult(@NonNull Status status) {
Log.i(TAG, "onResult: " + status);
if ( status.isSuccess() ) {
saveGeofence();
drawGeofence();
} else {
// inform about fail
}
}
// Draw Geofence circle on GoogleMap
private Circle geoFenceLimits;
private void drawGeofence() {
Log.d(TAG, "drawGeofence()");
if ( geoFenceLimits != null )
geoFenceLimits.remove();
CircleOptions circleOptions = new CircleOptions()
.center( geoFenceMarker.getPosition())
.strokeColor(Color.argb(50, 70,70,70))
.fillColor( Color.argb(100, 150,150,150) )
.radius( Float.parseFloat(rad) );
geoFenceLimits = map.addCircle( circleOptions );
}
// Saving GeoFence marker with prefs mn
private void saveGeofence() {
}
// Recovering last Geofence marker
private void recoverGeofenceMarker() {
}
}