如何在android工作室中用json在谷歌地图片段上添加多个标记

Question

我需要在片段活动中的谷歌地图上添加多个标记。

这是我当前的代码：

public View onCreateView(@NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
galleryViewModel =
new ViewModelProvider(this).get(GalleryViewModel.class);
View view = inflater.inflate(R.layout.fragment_gallery, container, false);
arrayList = new ArrayList<>();
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this::onMapReady);

ProgressDialog progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("Chargemnt des données en cours...");
progressDialog.show();
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
String url="http://emc2-cloud.com:8079/API/login";
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
progressDialog.dismiss();
JSONObject responselog2 = null;
try {
responselog2 = new JSONObject(response);
JSONObject logincolier = responselog2.getJSONObject("colier");
/* latitude_maison = logincolier.getString("latitude_maison");
longitude_maison = logincolier.getString("longitude_maison");*/
liste_colier = logincolier.getJSONArray("donnes_colier");
for (int k = 0; k<liste_colier.length(); k++){
JSONObject colierliste = liste_colier.getJSONObject(k);
detail_distance = colierliste.getString("distance");
vitesse = colierliste.getString("vitesse");
detail_latitude = colierliste.getDouble("latitude");
nom_colier = colierliste.getString("nom_colier");
detail_longitude = colierliste.getDouble("longitude");
etat_colier = colierliste.getString("etat_colier");                        
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
test.setTextColor(Color.RED);
test.setText("Connexion échouée");
}
}){
@Override
protected Map<String,String> getParams(){
Map<String,String> params=new HashMap<String, String>();
params.put("username",identifiant.getText().toString());
params.put("password",mot_de_passe.getText().toString());
return params;
}
};
requestQueue.add(stringRequest);
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
customMarker = BitmapDescriptorFactory.fromResource(R.drawable.teteboeuf);
colier = new LatLng(detail_latitude,detail_longitude);
mMap.addMarker(new MarkerOptions().position(colier).title(MainActivity.nom_colier).snippet("Vitessedu colier : "+MainActivity.vitesse+" km").icon(customMarker));
mMap.moveCamera(CameraUpdateFactory.newLatLng(colier));
mMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
Intent intent = new Intent(getActivity(),DetailColier.class);
startActivity(intent);
}
});
}

Answer 1

你可以这样做，

for (int k = 0; k<liste_colier.length(); k++){
JSONObject colierliste = liste_colier.getJSONObject(k);
detail_distance = colierliste.getString("distance");
vitesse = colierliste.getString("vitesse");
detail_latitude = colierliste.getDouble("latitude");
nom_colier = colierliste.getString("nom_colier");
detail_longitude = colierliste.getDouble("longitude");
etat_colier = colierliste.getString("etat_colier");
addMarker(detail_latitude ,detail_longitude)
}

在活动中定义此方法。

void addMarker(Double latitude, Double longitude){
LatLng latLong = new LatLng(Double latitude, Double longitude)
if(mMap!=null{
mMap.addMarker(new MarkerOptions().position(latLong))
}
}

有关向标记添加标题和其他信息，请参阅Marker官方谷歌文档