android-maps-v2

问题 How do I set the center of the map to a specific location using GMaps v2? This is how I did it using GMaps v1: public void setCenter( LatLng point ) { if( point.latitude*1000000 != 0 && point.longitude*1000000 != 0 ) { if( mMapController != null ) { mMapController.setCenter( point ); } /*else if( mOpenStreetMapViewControllerSource != null ) { mOpenStreetMapViewControllerSource.getController().setCenter( new org.osmdroid.util.GeoPoint( point.getLatitudeE6(), point.getLongitudeE6() ) );

问题 Currently migrating an Android app using Google Maps to Google Maps Android v2; I want the map to display the built-in location marker, as well as custom markers. With the previous library, I used to draw the location marker 'below' custom markers, with mapView.setReticleDrawMode(ReticleDrawMode.DRAW_RETICLE_UNDER); I can't find a similar option in the new API. Did I miss something? 回答1: After a bit a searching, I couldn't find such an option. I finally removed the location pin, and added a

问题 I'm also try to draw arc (I'm referencing on this and this questions). I'll get from web service following: Lat and Lng Radius (in meters) Start angle (end angle is startA + 60 degrees) Now I encounter on following problem because I do not have two LatLng, just one, and in new map api v2 there is no radius = Projection.metersToEquatorPixels method for providing to RectF.set(point.x - radius,...) Do you have code example, links, etc? Also what about performances of App, because I'll have up to

问题 Recently, I was working with Android Maps V2. I came across debug.keystore and release.keystore . What is the difference between them? Why do we have to use both? 回答1: The Android build process signs your application differently depending on which build mode you use to build your application. There are two build modes: debug mode and release mode . You use debug mode when you are developing and testing your application. You use release mode when you want to build a release version of your

问题 Recently, I was working with Android Maps V2. I came across debug.keystore and release.keystore . What is the difference between them? Why do we have to use both? 回答1: The Android build process signs your application differently depending on which build mode you use to build your application. There are two build modes: debug mode and release mode . You use debug mode when you are developing and testing your application. You use release mode when you want to build a release version of your

问题 I am trying to get google maps v2 to work in android using android studio. I got all my keys and manifest setup. When I try and create xml for the actual activity that the map will show up on I get errors. My xml looks like this: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <fragment xmlns:android="http://schemas

问题 I'm getting an NullPointerException with the following code: private ProjectionProxy proxy = new ProjectionProxy(); private GoogleMap mMap = null; private Context context = this; @Override protected void onCreate(Bundle load) { super.onCreate(load); setContentView(R.layout.fragment_ride_tracking); //mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.myMapView)).getMap(); mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap(); int result =

问题 I have googleMap (v2) with polyline that presents a route between the user current location and the destination point. Now, I want to update the polyline according to the user moving. I tried to redrawing the whole polyline when location is changed but the polyline is flickering. I didn't find any appropriate function in the PolylineOptions class (the function add() is only to add a vertex but not to update or remove) do you have any idea how to update the polyline ??? thank you for giving

问题 I have a view with a facebook style side bar navigation. On the main view I want to display my map. I have followed Google's tutorial exactly! But I keep running into the error Unable to instantiate android.gms.maps.SupportMapFragment. I did manage to run this on a plain project but when I merge it with my main project this error pops up: 07-25 13:27:53.778: E/AndroidRuntime(24841): Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.google

问题 It seems that is not possible to set an API v2 key programatically, so is there any other method to set this value after build. 回答1: i think its not possible because, During the build process, your Android projects are compiled and packaged into an .apk file, so you can't change it after build ! official documentation: http://developer.android.com/tools/building/index.html 来源： https://stackoverflow.com/questions/17594737/how-to-inject-a-maps-android-v2-api-key-into-an-application