为什么我只能使用Geofirestore取得一份文件

时间:2019-05-31 01:39:54

标签: java android google-cloud-firestore geofirestore

我正在尝试使用geofirestore查询最接近用户位置的文档,我的代码仅提取1个文档,并且如代码中所见,我将半径设置为100km,并设置了半径来自同一位置的文档。

这是我要查询的文档 document number 1 这是另一个半径相同的文档 document number 2

我试图在地图上打印snapshot结果,并且仅打印1个文档

在这里,我发送文档ID以将query内置到recyclerView

Map<String,Object> stringIntegerMap=new HashMap<>();
private void getNearestEstate(){
    GeoQuery geoQuery = geoFirestore.queryAtLocation(new GeoPoint(latitude, longitude), 100);
    geoQuery.addGeoQueryDataEventListener(new GeoQueryDataEventListener() {
        @Override
        public void onDocumentEntered(DocumentSnapshot documentSnapshot, GeoPoint geoPoint) {
           stringIntegerMap=documentSnapshot.getData();

            Query query=propertyRef.whereEqualTo("mID",Integer.parseInt(documentSnapshot.getId()));
           dataFetch(query,R.id.discoverRV);

            //here how i tried to print the result to see how many documents i got
            for (Map.Entry<String,Object> entry : stringIntegerMap.entrySet()) {
                String key = entry.getKey();
                String value = entry.getValue().toString();
                Toast.makeText(mContext,key+" "+value,Toast.LENGTH_LONG).show();
            }
        }

在这里,我建立查询并将其发送到recyclerview adapter

private void dataFetch(Query query,int rvView){
      FirestoreRecyclerOptions<Property> options = new FirestoreRecyclerOptions.Builder<Property>()
        .setQuery(query, Property.class)
        .build();

mAdapter = new DiscoverAdapter(options);
RecyclerView recyclerView = root.findViewById(rvView);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext(),LinearLayoutManager.HORIZONTAL,false));
recyclerView.setAdapter(mAdapter);
mAdapter.startListening();
}

此处是查询结果 enter image description here

1 个答案:

答案 0 :(得分:0)

我认为您正在使用com.github.imperiumlabs:GeoFirestore-Android,对吧?

从v1.5.0版本开始,代码和文档之间存在差异。该文档指出queryAtLocation使用公里

// creates a new query around [37.7832, -122.4056] with a radius of 0.6 kilometers
val geoQuery = geoFirestore.queryAtLocation(GeoPoint(37.7832, -122.4056), 0.6)

但是,代码将从转换为纬度:

fun distanceToLatitudeDegrees(distance: Double) = distance / Constants.METERS_PER_DEGREE_LATITUDE

Github上有一个open issue

将仪表传递到queryAtLocation应该可以解决问题。