https://stackoverflow.com/questions/13855049
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RussianI do it like this to show car positions on the map with markers of different colors:
private void addMarkersToMap() {
mMap.clear();
for (int i = 0; i < Cars.size(); i++) {
LatLng ll = new LatLng(Cars.get(i).getPos().getLat(), Cars.get(i).getPos().getLon());
BitmapDescriptor bitmapMarker;
switch (Cars.get(i).getState()) {
case 0:
bitmapMarker = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED);
Log.i(TAG, "RED");
break;
case 1:
bitmapMarker = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN);
Log.i(TAG, "GREEN");
break;
case 2:
bitmapMarker = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE);
Log.i(TAG, "ORANGE");
break;
default:
bitmapMarker = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED);
Log.i(TAG, "DEFAULT");
break;
}
mMarkers.add(mMap.addMarker(new MarkerOptions().position(ll).title(Cars.get(i).getName())
.snippet(getStateString(Cars.get(i).getState())).icon(bitmapMarker)));
Log.i(TAG,"Car number "+i+" was added " +mMarkers.get(mMarkers.size()-1).getId());
}
}
}
Cars is an ArrayList of custom objects and mMarkers is an ArrayList of markers.
Note : You can show map in fragment like this:
private GoogleMap mMap;
....
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the
// map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
// Hide the zoom controls as the button panel will cover it.
mMap.getUiSettings().setZoomControlsEnabled(false);
// Add lots of markers to the map.
addMarkersToMap();
// Setting an info window adapter allows us to change the both the
// contents and look of the
// info window.
mMap.setInfoWindowAdapter(new CustomInfoWindowAdapter());
// Set listeners for marker events. See the bottom of this class for
// their behavior.
mMap.setOnMarkerClickListener(this);
mMap.setOnInfoWindowClickListener(this);
mMap.setOnMarkerDragListener(this);
// Pan to see all markers in view.
// Cannot zoom to bounds until the map has a size.
final View mapView = getSupportFragmentManager().findFragmentById(R.id.map).getView();
if (mapView.getViewTreeObserver().isAlive()) {
mapView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@SuppressLint("NewApi")
// We check which build version we are using.
@Override
public void onGlobalLayout() {
LatLngBounds.Builder bld = new LatLngBounds.Builder();
for (int i = 0; i < mAvailableCars.size(); i++) {
LatLng ll = new LatLng(Cars.get(i).getPos().getLat(), Cars.get(i).getPos().getLon());
bld.include(ll);
}
LatLngBounds bounds = bld.build();
mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds, 70));
mapView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
});
}
}
And just call setUpMapIfNeeded() in onCreate()
