我在我的应用中添加了Google地图，并使用for循环在地图中添加了4个标记。我还设法通过使用Geocoder获取邮政编码，城市名称和这些添加标记的地址。
一切正常，但问题是标记上的点击似乎并不总是有效。有时我必须双击才能看到标记的标题。我真的不知道为什么。这是我的完整代码
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
String city, adress, zip;
Marker marker;
LatLngBounds.Builder builder = new LatLngBounds.Builder();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
LatLng[] point_new = new LatLng[4];
point_new[0] = new LatLng(52.4788535, 13.32730760000004);
point_new[1] = new LatLng(52.4794297, 13.313520799999992);
point_new[2] = new LatLng(52.5272885, 13.458033200000045);
point_new[3] = new LatLng(52.52603999999999, 13.488159999999993);
for (int i = 0; i < point_new.length; i++) {
drawMarker(point_new[i]);
marker = mMap.addMarker(new MarkerOptions().position(point_new[i]));
mMap.moveCamera(CameraUpdateFactory.newLatLng(point_new[i]));
}
getAdress(52.4788535, 13.32730760000004 );
marker = mMap.addMarker(new MarkerOptions().position(point_new[0]).title(adress+"," + zip + "" + city));
getAdress(52.4794297, 13.313520799999992);
marker = mMap.addMarker(new MarkerOptions().position(point_new[1]).title(adress+"," + zip + "" + city));
getAdress(52.5272885, 13.458033200000045);
marker = mMap.addMarker(new MarkerOptions().position(point_new[2]).title(adress+"," + zip + "" + city));
getAdress(52.52603999999999, 13.488159999999993);
marker = mMap.addMarker(new MarkerOptions().position(point_new[3]).title(adress+"," + zip + "" + city));
for (int j = 0; j < point_new.length; j++) {
builder.include(point_new[j]);
}
LatLngBounds bounds = builder.build();
mMap.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 20));
}
public void drawMarker(LatLng point) {
// Creating an instance of MarkerOptions
MarkerOptions markerOptions = new MarkerOptions();
// Setting latitude and longitude for the marker
markerOptions.position(point);
// Adding marker on the Google Map
mMap.addMarker(markerOptions);
}
public void getAdress(double lat, double lng){
Geocoder geocoder = new Geocoder(MapsActivity.this, Locale.getDefault());
List<Address> addresses = null;
try {
addresses = geocoder.getFromLocation(lat,lng,1);
} catch (IOException e) {
e.printStackTrace();
}
city = addresses.get(0).getLocality();
adress = addresses.get(0).getAddressLine(0);
zip = addresses.get(0).getPostalCode();
}
}
答案 0 :(得分：1)
尝试此代码，我已经测试过，它的工作
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
List<MarkerDesc> markerDescList = new ArrayList<>();
markerDescList.add(new MarkerDesc(new LatLng(52.4788535, 13.32730760000004), getAdress(52.4788535, 13.32730760000004)));
markerDescList.add(new MarkerDesc(new LatLng(52.4794297, 13.313520799999992), getAdress(52.4794297, 13.313520799999992)));
markerDescList.add(new MarkerDesc(new LatLng(52.5272885, 13.458033200000045), getAdress(52.5272885, 13.458033200000045)));
markerDescList.add(new MarkerDesc(new LatLng(52.52603999999999, 13.488159999999993), getAdress(52.52603999999999, 13.488159999999993)));
for(int i=0; i<markerDescList.size(); i++){
MarkerDesc markerDesc = markerDescList.get(i);
mMap.addMarker(new MarkerOptions()
.position(markerDesc.getLatLng())
.title(markerDesc.getAddresses().get(0).getLocality())
.snippet(markerDesc.getAddresses().get(0).getAddressLine(0)+"\n"+markerDesc.getAddresses().get(0).getPostalCode()+"\n"+markerDesc.getAddresses().get(0).getLocality())
.icon(BitmapDescriptorFactory.defaultMarker()));
}
LatLng latLng = markerDescList.get(markerDescList.size()-1).getLatLng();
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder().target(latLng).zoom(15).bearing(0).tilt(25).build()));
}
public List<Address> getAdress(double lat, double lng){
Geocoder geocoder = new Geocoder(MapsActivity.this, Locale.getDefault());
try {
return geocoder.getFromLocation(lat,lng,1);
} catch (IOException e) {
e.printStackTrace();
}
/*String city = addresses.get(0).getLocality();
String adress = addresses.get(0).getAddressLine(0);
String zip = addresses.get(0).getPostalCode();*/
return null;
}
private class MarkerDesc{
LatLng latLng;
List<Address> addresses;
private MarkerDesc(LatLng ltLng, List<Address> addr){
this.latLng=ltLng;
this.addresses = addr;
}
private LatLng getLatLng() {
return latLng;
}
private List<Address> getAddresses() {
return addresses;
}
}
}