【发布时间】:2016-09-19 07:09:44
【问题描述】:
我目前正在制作地图,我必须在地图上显示两个标记,一个是当前位置,另一个是目标位置,并且它们处于最大缩放状态,两个标记都应该在地图上可见。 目前,我正在以最大缩放获得当前位置,工作完美,现在我不知道如何添加第二个标记,即目的地以及在哪里获得最大缩放。
感谢任何帮助!我试过了:
public class MapMainActivity extends AppCompatActivity implements
OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
LatLng latLng;
GoogleMap mGoogleMap;
SupportMapFragment mFragment;
Marker currLocationMarker;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_map_main);
mFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googlemap);
mFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap gMap) {
mGoogleMap = gMap;
mGoogleMap.setMyLocationEnabled(true);
buildGoogleApiClient();
mGoogleApiClient.connect();
}
protected synchronized void buildGoogleApiClient() {
Toast.makeText(this, "buildGoogleApiClient", Toast.LENGTH_SHORT).show();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
@Override
public void onConnected(Bundle bundle) {
Toast.makeText(this, "onConnected", Toast.LENGTH_SHORT).show();
Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
//place marker at current position
//mGoogleMap.clear();
latLng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
currLocationMarker = mGoogleMap.addMarker(markerOptions);
}
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(5000); //5 seconds
mLocationRequest.setFastestInterval(3000); //3 seconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
//mLocationRequest.setSmallestDisplacement(0.1F); //1/10 meter
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnectionSuspended(int i) {
Toast.makeText(this,"onConnectionSuspended",Toast.LENGTH_SHORT).show();
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Toast.makeText(this,"onConnectionFailed",Toast.LENGTH_SHORT).show();
}
@Override
public void onLocationChanged(Location location) {
//place marker at current position
//mGoogleMap.clear();
if (currLocationMarker != null) {
currLocationMarker.remove();
}
latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("My Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
currLocationMarker = mGoogleMap.addMarker(markerOptions);
Toast.makeText(this,"Location Changed",Toast.LENGTH_SHORT).show();
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(latLng).zoom(14).build();
mGoogleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
}
}
【问题讨论】:
-
您想在地图上显示的目的地纬度在哪里?
-
@nitishpatel 我想知道,在哪里添加目的地 lat 和 lng ,我很难假设目的地 lat 和 lng 是 22.5726 和 88.3639
-
您可以在显示当前位置时通过传递 22.5726 和 88.3639 来调用它的 onMapReady() 方法。
-
谢谢,让我试一试,让你知道
标签: android google-maps marker