Firebase Queries Not Working On Android Even Though The Reference Retrieves Data

I am trying to filter my Firebase data, my dataset is complex but here is a sample. I am able to retrieve data just fine but I am unable to filter that data any further using the F

Solution 1:

Firebase queries return a subset of the child nodes in a list.

So if you have a list of locations:

locations: {
  location1: { lat:42.010185, lon:-33.010185 },
  location2: { lat:-11.19645, lon:52.461219 },
  location3: { lat:33.14518,  lon:-11.128746 }
}

You could query the locations with:

ref.child("locations").orderByChild("lat").startAt(-12.0).endAt(-10)

Your data is missing a level: you're querying test, but are missing the location1, location2, location3 level that I have under it. If you add such a level, your query will be able to match the child.

Your next problem is likely going to be that Firebase Database queries can only order by/filter on a single property. That means that for geo-queries, you can currently only filter on longitude or on latitude, which makes for only half a geo-query. I recommend that you look into GeoFire, which is our library for geo-querying. It combines latitude and longitude of each item into a single geohash value, which can then be queried.