在谷歌地图中沿着路径动画一辆车（标记）android

Question

如果您有List，我将分享沿路径移动标记的解决方案。位图将沿着使用LatLng列表的路径移动。

Answer 1

public static void setAnimation(GoogleMap myMap, final List<LatLng> directionPoint, final Bitmap bitmap) { 


    Marker marker = myMap.addMarker(new MarkerOptions() 
      .icon(BitmapDescriptorFactory.fromBitmap(bitmap)) 
      .position(directionPoint.get(0)) 
      .flat(true)); 

    myMap.animateCamera(CameraUpdateFactory.newLatLngZoom(directionPoint.get(0), 10)); 

    animateMarker(myMap, marker, directionPoint, false); 
} 


private static void animateMarker(GoogleMap myMap, final Marker marker, final List<LatLng> directionPoint, 
            final boolean hideMarker) { 
    final Handler handler = new Handler(); 
    final long start = SystemClock.uptimeMillis(); 
    Projection proj = myMap.getProjection(); 
    final long duration = 30000; 

    final Interpolator interpolator = new LinearInterpolator(); 

    handler.post(new Runnable() { 
     int i = 0; 

     @Override 
     public void run() { 
      long elapsed = SystemClock.uptimeMillis() - start; 
      float t = interpolator.getInterpolation((float) elapsed 
        /duration); 
      if (i < directionPoint.size()) 
       marker.setPosition(directionPoint.get(i)); 
      i++; 


      if (t < 1.0) { 
       // Post again 16ms later. 
       handler.postDelayed(this, 16); 
      } else { 
       if (hideMarker) { 
        marker.setVisible(false); 
       } else { 
        marker.setVisible(true); 
       } 
      } 
     } 
    }); 
} 

Answer 2

我也完成了这个相同的场景，这里给出的代码。

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, LocationListener { 

private static Location oldLocation; 
private GoogleMap mMap; 
private LocationManager locationManager; 
private Marker marker; 
private static float angle; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_maps); 
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); 
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
     // TODO: Consider calling 
     Toast.makeText(this, "Location permissioin in not enable", Toast.LENGTH_SHORT).show(); 
     return; 
    } 
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2, 0, this); 
    mapFragment.getMapAsync(this); 
} 

@Override 
public void onMapReady(GoogleMap googleMap) { 
    mMap = googleMap; 
} 

@Override 
public void onLocationChanged(Location location) { 
    locationUpdate(location); 
    if (oldLocation != null) { 
     double bearing = angleFromCoordinate(oldLocation.getLatitude(), oldLocation.getLongitude(), location.getLatitude(), location.getLongitude()); 
     changeMarkerPosition(bearing); 
    } 
    oldLocation = location; 
} 

private void locationUpdate(Location location) { 
    LatLng latLng = new LatLng((location.getLatitude()), (location.getLongitude())); 
    MarkerOptions markerOptions = new MarkerOptions(); 
    markerOptions.position(latLng); 
    markerOptions.title("Current Position"); 
    markerOptions.icon(BitmapDescriptorFactory.fromResource(R.drawable.car_right)); 
    mMap.clear(); 
    marker = mMap.addMarker(markerOptions); 
    CameraPosition position = CameraPosition.builder() 
      .target(new LatLng(location.getLatitude(), location.getLongitude())) 
      .zoom(19) 
      .tilt(30) 
      .build(); 
    mMap.animateCamera(CameraUpdateFactory.newCameraPosition(position)); 
} 

private void changeMarkerPosition(double position) { 
    float direction = (float) position; 
    Log.e("LocationBearing", "" + direction); 

    if (direction==360.0){ 
     //default 
     marker.setRotation(angle); 
    }else { 
     marker.setRotation(direction); 
     angle=direction; 
    } 
} 

@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 

} 

@Override 
public void onProviderEnabled(String provider) { 

} 

@Override 
public void onProviderDisabled(String provider) { 

} 


private double angleFromCoordinate(double lat1, double long1, double lat2, 
            double long2) { 
    double dLon = (long2 - long1); 

    double y = Math.sin(dLon) * Math.cos(lat2); 
    double x = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1) 
      * Math.cos(lat2) * Math.cos(dLon); 

    double brng = Math.atan2(x, y); 

    brng = Math.toDegrees(brng); 
    brng = (brng + 360) % 360; 
    brng = 360 - brng; 
    return brng; 
}} 

希望对您有所帮助。