Google地图显示来自Firebase的多个标记

Google地图显示来自Firebase的多个标记

本文介绍了Google地图显示来自Firebase的多个标记的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我的代码允许我输入经纬度的位置名称,然后地图用标记显示位置。



我遇到的问题是我想让地图显示所有位置,每个位置都有自己的地图标记。



以下是我用来在地图上显示一个位置的代码

  public void onMapReady(GoogleMap googleMap){
mMap = googleMap;
googleMap.setOnMarkerClickListener(this);
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mVenues.addListenerForSingleValueEvent(new ValueEventListener(){
@Override
public void onDataChange(DataSnapshot dataSnapshot){
for(DataSnapshot s:dataSnapshot.getChildren()){
场地场地= s.getValue(Venue.class);
LatLng位置=新LatLng(venue.venueLat,venue.venueLong);
mMap.addMarker(新MarkerOptions()。position(location))。 title(venue.venueName)).setIcon(BitmapDescriptorFactory.defaultMarker());
}
}
$ b $ @覆盖
public void onCancelled(DatabaseError databaseError){

}
});
}

任何帮助都很有帮助

我没有任何错误,只是显示了我已经添加到firebasedatabase的一个位置。

解决方案
 标记标记; 
列表< Venue> venueList;

//在onCreate方法中
venueList = new ArrayList<>();

  mVenues.push()。setValue(marker); 

// onMaps ready方法

  public void onMapReady(GoogleMap googleMap){
mMap = googleMap;
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mVenues.addListenerForSingleValueEvent(new ValueEventListener(){
@Override
public void onDataChange(DataSnapshot dataSnapshot){
for(DataSnapshot s:dataSnapshot.getChildren()){
场地场地= s.getValue(Venue.class);

venueList.add(场地);
(int i = 0; i< venueList.size(); i ++)
{
LatLng latLng = new LatLng(venue.venueLat,venue.venueLong);
if(mMap!= null){
marker = mMap.addMarker(new MarkerOptions() .position(latLng).title(venue.venueName));
}
}
}

}


I have code that allows me to input the location name with the lat and longitude and then the map displays the location with a marker.

The issue i am having is that i want the map to show all the locations, each with its own marker on the map.

Below is the code i have used to get the one location showing on the map

public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    googleMap.setOnMarkerClickListener(this);
    googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    mVenues.addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot s : dataSnapshot.getChildren()){
                Venue venue = s.getValue(Venue.class);
                LatLng location=new LatLng(venue.venueLat,venue.venueLong);
                mMap.addMarker(new MarkerOptions().position(location).title(venue.venueName)).setIcon(BitmapDescriptorFactory.defaultMarker());
            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });
}

Any help is much apreciated

I have no errors just shows the one location that i have added to the firebasedatabase

解决方案
   Marker marker;
List<Venue> venueList;

//in onCreate method venueList = new ArrayList<>();

    mVenues.push().setValue(marker);

//onMaps ready method

public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    mVenues.addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot s : dataSnapshot.getChildren()){
                Venue venue = s.getValue(Venue.class);

                venueList.add(venue);
                for (int i = 0; i < venueList.size(); i++)
                {
                    LatLng latLng = new LatLng(venue.venueLat,venue.venueLong);
                    if (mMap != null) {
                        marker = mMap.addMarker(new MarkerOptions().position(latLng).title(venue.venueName));
                                            }
                }
            }

        }

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08-21 06:16