问题
I would like to replace the default icon that Android Maps V2 uses for 'My Location' (The little blue dot/arrow) with my own image. I've created my own tile provider that brings in a few maps which are predominantly blue and as such the default My Location icon is very hard to see. Previously I would have just overridden the draw method of the MyLocationOverlay, but there doesn't seem to be one in the new api. Any help would be great!
EDIT: I also need the icon to be able to rotate, the same way that the arrow does depending on which way you are facing. So i can't just use a normal marker :( Basically I just need to create a custom image for that arrow..
Update Hi All, the update to Google play now allows flat markers and marker rotation which is exactly what I needed.
回答1:
my simple solution way is just disable "my location" of Google map
and create ImageView on Map with my icon then capture ImageView with
onClick and getMyLocation , animateCamera in onClick
this.mGoogleMap.getUiSettings().setMyLocationButtonEnabled(false);
this.mGoogleMap.setMyLocationEnabled(true);
.
@Override
public void onClick(final View v) {
Location location = this.mGoogleMap.getMyLocation();
if (location != null) {
LatLng target = new LatLng(location.getLatitude(), location.getLongitude());
CameraPosition position = this.mGoogleMap.getCameraPosition();
Builder builder = new CameraPosition.Builder();
builder.zoom(15);
builder.target(target);
this.mGoogleMap.animateCamera(CameraUpdateFactory.newCameraPosition(builder.build()));
}
}
回答2:
The latest update to Google Play Services now allows you to use 'Flat' Markers and rotate them which is exactly what I needed. Here is a simple version of the way I implemented it. There is probably a fair bit I can do to optimize and tweak the animation, but it does the job for the moment. Any feedback is welcome.
Marker mPositionMarker;
GoogleMap mMap;
@Override
public void onLocationChanged(Location location) {
if (location == null)
return;
if (mPositionMarker == null) {
mPositionMarker = mMap.addMarker(new MarkerOptions()
.flat(true)
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.positionIndicator))
.anchor(0.5f, 0.5f)
.position(
new LatLng(location.getLatitude(), location
.getLongitude())));
}
animateMarker(mPositionMarker, location); // Helper method for smooth
// animation
mMap.animateCamera(CameraUpdateFactory.newLatLng(new LatLng(location
.getLatitude(), location.getLongitude())));
}
public void animateMarker(final Marker marker, final Location location) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final LatLng startLatLng = marker.getPosition();
final double startRotation = marker.getRotation();
final long duration = 500;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed
/ duration);
double lng = t * location.getLongitude() + (1 - t)
* startLatLng.longitude;
double lat = t * location.getLatitude() + (1 - t)
* startLatLng.latitude;
float rotation = (float) (t * location.getBearing() + (1 - t)
* startRotation);
marker.setPosition(new LatLng(lat, lng));
marker.setRotation(rotation);
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
}
}
});
}
回答3:
As of 3.1.36 you cannot change the icon (I feel it will change in the future, but looking at the speed of API v2 improvements implementation, it won't be before Christmas).
You can however use a marker now, because it has setIcon function.
Basically you have to forget about GoogleMap.setMyLocationEnabled, because it will always appear above. You will instead create your own LocationClient and use lat, long and bearing from Location to update the Marker. Additionally add a Circle and use accuracy to have an effect similar to the default myLocation visualization.
回答4:
You can not handle click event of MyLocation button on Google map, yeah but there is a trick through which you can get behavior as per your need:
first in your layout.xml file add map and dummy MyLocation button.
You can achieve this with the help of Relative Layout:
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:id="@+id/myLocationButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:background="@drawable/mylocation" />
</RelativeLayout>
You can take "mylocation.png" seems like u see on Google map.LocationManager locationManager = (LocationManager)getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String s = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(s);
Call click event of your dummy MyLocation button, in which you will add markerprivate GoogleMap googleMap;
googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
googleMap.addMarker(new MarkerOptions().icon(YOUR_MODIFIED_ICON).position(latLng).title(TITLE).snippet(SNIPET));
In this way you can modify Google map's default icon.
Yeah also you need to set zoom level:googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
回答5:
try this; I use this for draw a route on the map, but I set icons for the markers and for my location Declare this for view your location:
LocationManager locationManager = (LocationManager)
getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
Location myLocation= locationManager.getLastKnownLocation(provider);
longitude = myLocation.getLongitude();
latitude = myLocation.getLatitude();
fromPosition = new LatLng(latitude, longitude);
And create a function like that, I used for draw on the map but I set icons on the markers and my position:
mGoogleMap.clear();
if(response.equalsIgnoreCase("Success"))
{
ArrayList<LatLng> directionPoint = v2GetRouteDirection.getDirection(document);
PolylineOptions rectLine = new PolylineOptions().width(7).color(Color.BLUE);
for (int i = 0; i < directionPoint.size(); i++) {
rectLine.add(directionPoint.get(i));
}
// Adding route on the map
mGoogleMap.setOnMarkerClickListener(MainActivity.this);
mGoogleMap.addPolyline(rectLine);
markerOptions.position(fromPosition);
markerOptions.draggable(true);
Marker1 = mGoogleMap.addMarker(new MarkerOptions()
.position(Estadio)
.title("Estadio Cuscatlan")
.snippet("Estadio Cuscatlan")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.mapmarker)));
Marker2 = mGoogleMap.addMarker(new MarkerOptions()
.position(Metrocentro)
.title("Metrocentro")
.snippet("Metrosuelo")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.mapmark
Marker3 = mGoogleMap.addMarker(new MarkerOptions()
.position(Mejicanos)
.title("Mejicanos")
.snippet("Mejicanos")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.mapmarker)));
MarkerMe = mGoogleMap.addMarker(new MarkerOptions()
.position(fromPosition)
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.car64)));
}
Dialog.dismiss();
}
}
回答6:
Here is the code to access location button:
View mv=findViewById(R.id.map);
View locationButton = ((View) mv.findViewById(Integer.parseInt("1")).getParent()).findViewById(Integer.parseInt("2"));
RelativeLayout.LayoutParams rlp = (RelativeLayout.LayoutParams) locationButton.getLayoutParams();
// position on right bottom
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP, 0);
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
rlp.setMargins(0, 180, 180, 0);
来源：https://stackoverflow.com/questions/14826345/android-maps-api-v2-change-mylocation-icon