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[英]How do I set title for user location Marker in android's Google map v2?
[英]How do I update the map marker without changing the zoom that the user has set?
我有一個正在構建的 Android 應用程序,它使用帶有位置偵聽器的 Google 地圖。 當地圖第一次出現時,我在位置偵聽器中將縮放設置為 12,我在 Google Maps 開發中相當新,所以我想知道如何在用戶捏住更改縮放后更新位置而不影響縮放? 下面是我的位置監聽器。
/**
*Mylocationlistener class will give the current GPS location
*with the help of Location Listener interface
*/
private class Mylocationlistener implements LocationListener {
@Override
public void onLocationChanged(Location location) {
if (location != null) {
// ---Get current location latitude, longitude---
Log.d("LOCATION CHANGED", location.getLatitude() + "");
Log.d("LOCATION CHANGED", location.getLongitude() + "");
currentLocation = new LatLng(location.getLatitude(), location.getLongitude());
currentLatLng = new LatLng(location.getLatitude(), location.getLongitude());
Marker currentLocationMarker = map.addMarker(new MarkerOptions().position(currentLocation).title("Current Location"));
// Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(currentLatLng, 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(12), 2000, null);
if (!firstPass){
currentLocationMarker.remove();
}
firstPass = false;
Toast.makeText(MapViewActivity.this,"Latitude = "+
location.getLatitude() + "" +"Longitude = "+ location.getLongitude(),
Toast.LENGTH_LONG).show();
}
}
您可以在偵聽器中添加局部變量,並使用它僅縮放第一個位置。 代碼如下所示:
private class Mylocationlistener implements LocationListener {
private boolean zoomed = false;
@Override
public void onLocationChanged(Location location) {
if (location != null) {
// ---Get current location latitude, longitude---
Log.d("LOCATION CHANGED", location.getLatitude() + "");
Log.d("LOCATION CHANGED", location.getLongitude() + "");
currentLocation = new LatLng(location.getLatitude(), location.getLongitude());
currentLatLng = new LatLng(location.getLatitude(), location.getLongitude());
Marker currentLocationMarker = map.addMarker(new MarkerOptions().position(currentLocation).title("Current Location"));
// Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(currentLatLng, 15));
// Zoom in, animating the camera.
if (!zoomed) {
map.animateCamera(CameraUpdateFactory.zoomTo(12), 2000, null);
zoomed = true;
}
if (!firstPass){
currentLocationMarker.remove();
}
firstPass = false;
Toast.makeText(MapViewActivity.this,"Latitude = "+
location.getLatitude() + "" +"Longitude = "+ location.getLongitude(),
Toast.LENGTH_LONG).show();
}
}
嘗試使用這個:
map.animateCamera(CameraUpdateFactory.newLatLngZoom(currentLocationMarker.getPosition(), map.getCameraPosition().zoom));
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