I would like to save the state of google maps in android application I'm developing, I managed to save the state of the camera, but the state including the markers have not succeeded. Any suggestions ??
I have created a function to save the state of the camera and a method that I created to try to save bookmarks class. But it does not work.
MapStateManager.java
public class MapStateManager {
private SharedPreferences mapStatePrefs;
private MarkerOptions markerOptions;
private GoogleMap map;
private static final String LATITUD = "latitud";
private static final String LONGITUD = "longitud";
private static final String LATITUD_MARKER = "latitud";
private static final String LONGITUD_MARKER = "longitud";
private static final String ZOOM = "zoom";
private static final String BEARING = "bearing";
private static final String TILT = "tilt";
private static final String MAPTYPE = "maptype";
private static final String PREFS_NAME = "mapCameraState";
public MapStateManager(Context context, MarkerOptions markerOptions){
this.markerOptions = markerOptions;
mapStatePrefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
}
public void saveMapState(GoogleMap map){
SharedPreferences.Editor editor = mapStatePrefs.edit();
CameraPosition position = map.getCameraPosition();
editor.putFloat(LATITUD, (float) position.target.latitude);
editor.putFloat(LONGITUD, (float) position.target.longitude);
editor.putFloat(ZOOM, position.zoom);
editor.putFloat(TILT, position.tilt);
editor.putFloat(BEARING,position.bearing);
editor.putFloat(MAPTYPE, map.getMapType());
editor.commit();
}
public MarkerOptions saveMarkersState(){
MarkerOptions marker = markerOptions;
marker = new MarkerOptions()
.title("marker")
.position(new LatLng(marker.getPosition().latitude, marker.getPosition().longitude))
.icon(BitmapDescriptorFactory.defaultMarker());
map.addMarker(marker);
if(marker.getPosition().latitude == 0){
return null;
}
if(marker.getPosition().longitude == 0){
return null;
}
//LatLng position = new LatLng(latitud, longitud);
SharedPreferences.Editor editor = mapStatePrefs.edit();
editor.putFloat(LATITUD_MARKER, (float) marker.getPosition().latitude);
editor.putFloat(LONGITUD_MARKER, (float) marker.getPosition().longitude);
editor.commit();
return marker;
}
public CameraPosition saveCameraPosition(){
double latitud = mapStatePrefs.getFloat(LATITUD, 0);
if(latitud == 0){
return null;
}
double longitud= mapStatePrefs.getFloat(LONGITUD, 0);
LatLng target = new LatLng(latitud, longitud);
float zoom = mapStatePrefs.getFloat(ZOOM, 0);
float bearing = mapStatePrefs.getFloat(BEARING, 0);
float tilt = mapStatePrefs.getFloat(TILT, 0);
CameraPosition position = new CameraPosition(target, zoom, tilt, bearing);
return position;
}
}
MainActivity.java (Override methods)
@Override
protected void onResume() {
super.onResume();
mapFragment.onResume();
// onSaveInstanceState(state);
setUpMapIfNeeded();
MapStateManager mapstateCamera = new MapStateManager(this, markerOptions);
CameraPosition position = mapstateCamera.saveCameraPosition();
if(position != null){
CameraUpdate update = CameraUpdateFactory.newCameraPosition(position);
mMap.moveCamera(update);
//mMap.getMyLocation();
}
/*if(markerOptions != null){
mapstateCamera.saveMarkersState();
}*/
//
}
@Override
protected void onSaveInstanceState(Bundle guardarEstado) {
super.onSaveInstanceState(guardarEstado);
String joined = TextUtils.join(", ", markers);
guardarEstado.putString(STATE_MAP_MARKER, joined);
}
@Override
protected void onRestoreInstanceState(Bundle recuperarEstado) {
super.onRestoreInstanceState(recuperarEstado);
mCurrentScore = recuperarEstado.getString(STATE_MAP_RECOVERY);
}
@Override
protected void onStop() {
MapStateManager mapState = new MapStateManager(this, markerOptions);
mapState.saveMapState(mMap);
//mapState.saveMarkersState();
super.onStop();
}
@Override
protected void onPause() {
super.onPause();
mapFragment.onPause();
}
Thanks to all :)
