firebaserecycleradapter sort/compare/reorder data before populate
0
In my firebase database I have a collection of lat and long for each uid.
I use firebase recyler adapter data to list down my data to the recycler view.
FirebaseRecyclerAdapter<Model, ViewHolder> firebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<Model, ViewHolder>(Model.class, R.layout.row, ViewHolder.class, mRef) {
@Override
protected void populateViewHolder(final ViewHolder viewHolder, final Model model, int position) {
Double dist = distance(
myPosition.latitude,
myPosition.longitude,
Double.parseDouble(model.getLat()),
Double.parseDouble(model.getLon()));
Log.d("gs_distance", String.valueOf(dist));
viewHolder.setDetails(getApplicationContext(),
model.getLat(),
model.getLon(),
model.getGsname());
}
The problem is I want to reorder/sort the data by nearest to farthest from my location, i can already fetch distance on how far each latlng is from my location. I dont know if there is a way to compare each latlng by their distance just before the data enters the populateViewHolder. Or maybe sort it after being inserted in the recyclerview? I really dont know.
static double distance(double fromLat, double fromLon, double toLat, double toLon) {
Location loc1 = new Location("");
loc1.setLatitude(fromLat);
loc1.setLongitude(fromLon);
Location loc2 = new Location("");
loc2.setLatitude(toLat);
loc2.setLongitude(toLon);
float distanceInMeters = loc1.distanceTo(loc2);
return distanceInMeters / 1000; //convert to km
}
android firebase firebase-realtime-database firebaseui edited Nov 14 '18 at 21:30
Frank van Puffelen
231k28378402
asked Nov 14 '18 at 21:01
Mikhail CraoxMikhail Craox
11
add a comment |
0
In my firebase database I have a collection of lat and long for each uid.
I use firebase recyler adapter data to list down my data to the recycler view.
FirebaseRecyclerAdapter<Model, ViewHolder> firebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<Model, ViewHolder>(Model.class, R.layout.row, ViewHolder.class, mRef) {
@Override
protected void populateViewHolder(final ViewHolder viewHolder, final Model model, int position) {
Double dist = distance(
myPosition.latitude,
myPosition.longitude,
Double.parseDouble(model.getLat()),
Double.parseDouble(model.getLon()));
Log.d("gs_distance", String.valueOf(dist));
viewHolder.setDetails(getApplicationContext(),
model.getLat(),
model.getLon(),
model.getGsname());
}
The problem is I want to reorder/sort the data by nearest to farthest from my location, i can already fetch distance on how far each latlng is from my location. I dont know if there is a way to compare each latlng by their distance just before the data enters the populateViewHolder. Or maybe sort it after being inserted in the recyclerview? I really dont know.
static double distance(double fromLat, double fromLon, double toLat, double toLon) {
Location loc1 = new Location("");
loc1.setLatitude(fromLat);
loc1.setLongitude(fromLon);
Location loc2 = new Location("");
loc2.setLatitude(toLat);
loc2.setLongitude(toLon);
float distanceInMeters = loc1.distanceTo(loc2);
return distanceInMeters / 1000; //convert to km
}
edited Nov 14 '18 at 21:30
Frank van Puffelen
231k28378402
asked Nov 14 '18 at 21:01
Mikhail CraoxMikhail Craox
11
3
Firebase adapters from FirebaseUI will show the data in the order in which it is retrieved from he database. I don't think it has support for reordering the items client-side. That means you'll have to write a custom adapter for it, which reads the items from the database, and orders them by distance, and then shows them in that order.
– Frank van Puffelen
Nov 14 '18 at 21:32
better use your own adapter, because it will give you more freedom in so many aspects
– Har Kal
Nov 14 '18 at 22:56
Does custom adapter only works with array lists? Im really new at this. Thanks for the reply btw, it gives me motivation to continue with my problem.
– Mikhail Craox
Nov 15 '18 at 6:25
Should I use dataSnapshot to loop through my firebase data and add each into an arrayList, then from array list into the custom adapter?
– Mikhail Craox
Nov 15 '18 at 6:52
add a comment |
0
0
0
In my firebase database I have a collection of lat and long for each uid.
I use firebase recyler adapter data to list down my data to the recycler view.
FirebaseRecyclerAdapter<Model, ViewHolder> firebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<Model, ViewHolder>(Model.class, R.layout.row, ViewHolder.class, mRef) {
@Override
protected void populateViewHolder(final ViewHolder viewHolder, final Model model, int position) {
Double dist = distance(
myPosition.latitude,
myPosition.longitude,
Double.parseDouble(model.getLat()),
Double.parseDouble(model.getLon()));
Log.d("gs_distance", String.valueOf(dist));
viewHolder.setDetails(getApplicationContext(),
model.getLat(),
model.getLon(),
model.getGsname());
}
The problem is I want to reorder/sort the data by nearest to farthest from my location, i can already fetch distance on how far each latlng is from my location. I dont know if there is a way to compare each latlng by their distance just before the data enters the populateViewHolder. Or maybe sort it after being inserted in the recyclerview? I really dont know.
static double distance(double fromLat, double fromLon, double toLat, double toLon) {
Location loc1 = new Location("");
loc1.setLatitude(fromLat);
loc1.setLongitude(fromLon);
Location loc2 = new Location("");
loc2.setLatitude(toLat);
loc2.setLongitude(toLon);
float distanceInMeters = loc1.distanceTo(loc2);
return distanceInMeters / 1000; //convert to km
}
edited Nov 14 '18 at 21:30
Frank van Puffelen
231k28378402
asked Nov 14 '18 at 21:01
Mikhail CraoxMikhail Craox
11
In my firebase database I have a collection of lat and long for each uid.
I use firebase recyler adapter data to list down my data to the recycler view.
FirebaseRecyclerAdapter<Model, ViewHolder> firebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<Model, ViewHolder>(Model.class, R.layout.row, ViewHolder.class, mRef) {
@Override
protected void populateViewHolder(final ViewHolder viewHolder, final Model model, int position) {
Double dist = distance(
myPosition.latitude,
myPosition.longitude,
Double.parseDouble(model.getLat()),
Double.parseDouble(model.getLon()));
Log.d("gs_distance", String.valueOf(dist));
viewHolder.setDetails(getApplicationContext(),
model.getLat(),
model.getLon(),
model.getGsname());
}
The problem is I want to reorder/sort the data by nearest to farthest from my location, i can already fetch distance on how far each latlng is from my location. I dont know if there is a way to compare each latlng by their distance just before the data enters the populateViewHolder. Or maybe sort it after being inserted in the recyclerview? I really dont know.
static double distance(double fromLat, double fromLon, double toLat, double toLon) {
Location loc1 = new Location("");
loc1.setLatitude(fromLat);
loc1.setLongitude(fromLon);
Location loc2 = new Location("");
loc2.setLatitude(toLat);
loc2.setLongitude(toLon);
float distanceInMeters = loc1.distanceTo(loc2);
return distanceInMeters / 1000; //convert to km
}
edited Nov 14 '18 at 21:30
Frank van Puffelen
231k28378402
asked Nov 14 '18 at 21:01
Mikhail CraoxMikhail Craox
11
edited Nov 14 '18 at 21:30
Frank van Puffelen
231k28378402
asked Nov 14 '18 at 21:01
Mikhail CraoxMikhail Craox
11
edited Nov 14 '18 at 21:30
Frank van Puffelen
231k28378402
edited Nov 14 '18 at 21:30
Frank van Puffelen
231k28378402
edited Nov 14 '18 at 21:30
Frank van Puffelen
231k28378402
231k28378402
asked Nov 14 '18 at 21:01
Mikhail CraoxMikhail Craox
11
asked Nov 14 '18 at 21:01
Mikhail CraoxMikhail Craox
11
asked Nov 14 '18 at 21:01
Mikhail CraoxMikhail Craox
11
11
3
Firebase adapters from FirebaseUI will show the data in the order in which it is retrieved from he database. I don't think it has support for reordering the items client-side. That means you'll have to write a custom adapter for it, which reads the items from the database, and orders them by distance, and then shows them in that order.
– Frank van Puffelen
Nov 14 '18 at 21:32
better use your own adapter, because it will give you more freedom in so many aspects
– Har Kal
Nov 14 '18 at 22:56
Does custom adapter only works with array lists? Im really new at this. Thanks for the reply btw, it gives me motivation to continue with my problem.
– Mikhail Craox
Nov 15 '18 at 6:25
Should I use dataSnapshot to loop through my firebase data and add each into an arrayList, then from array list into the custom adapter?
– Mikhail Craox
Nov 15 '18 at 6:52
add a comment |
3
Firebase adapters from FirebaseUI will show the data in the order in which it is retrieved from he database. I don't think it has support for reordering the items client-side. That means you'll have to write a custom adapter for it, which reads the items from the database, and orders them by distance, and then shows them in that order.
– Frank van Puffelen
Nov 14 '18 at 21:32
better use your own adapter, because it will give you more freedom in so many aspects
– Har Kal
Nov 14 '18 at 22:56
Does custom adapter only works with array lists? Im really new at this. Thanks for the reply btw, it gives me motivation to continue with my problem.
– Mikhail Craox
Nov 15 '18 at 6:25
Should I use dataSnapshot to loop through my firebase data and add each into an arrayList, then from array list into the custom adapter?
– Mikhail Craox
Nov 15 '18 at 6:52
3
3
Firebase adapters from FirebaseUI will show the data in the order in which it is retrieved from he database. I don't think it has support for reordering the items client-side. That means you'll have to write a custom adapter for it, which reads the items from the database, and orders them by distance, and then shows them in that order.
– Frank van Puffelen
Nov 14 '18 at 21:32
Firebase adapters from FirebaseUI will show the data in the order in which it is retrieved from he database. I don't think it has support for reordering the items client-side. That means you'll have to write a custom adapter for it, which reads the items from the database, and orders them by distance, and then shows them in that order.
– Frank van Puffelen
Nov 14 '18 at 21:32
better use your own adapter, because it will give you more freedom in so many aspects
– Har Kal
Nov 14 '18 at 22:56
better use your own adapter, because it will give you more freedom in so many aspects
– Har Kal
Nov 14 '18 at 22:56
Does custom adapter only works with array lists? Im really new at this. Thanks for the reply btw, it gives me motivation to continue with my problem.
– Mikhail Craox
Nov 15 '18 at 6:25
Does custom adapter only works with array lists? Im really new at this. Thanks for the reply btw, it gives me motivation to continue with my problem.
– Mikhail Craox
Nov 15 '18 at 6:25
Should I use dataSnapshot to loop through my firebase data and add each into an arrayList, then from array list into the custom adapter?
– Mikhail Craox
Nov 15 '18 at 6:52
Should I use dataSnapshot to loop through my firebase data and add each into an arrayList, then from array list into the custom adapter?
– Mikhail Craox
Nov 15 '18 at 6:52
add a comment |
0
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3
Firebase adapters from FirebaseUI will show the data in the order in which it is retrieved from he database. I don't think it has support for reordering the items client-side. That means you'll have to write a custom adapter for it, which reads the items from the database, and orders them by distance, and then shows them in that order.
– Frank van Puffelen
Nov 14 '18 at 21:32
better use your own adapter, because it will give you more freedom in so many aspects
– Har Kal
Nov 14 '18 at 22:56
Does custom adapter only works with array lists? Im really new at this. Thanks for the reply btw, it gives me motivation to continue with my problem.
– Mikhail Craox
Nov 15 '18 at 6:25
Should I use dataSnapshot to loop through my firebase data and add each into an arrayList, then from array list into the custom adapter?
– Mikhail Craox
Nov 15 '18 at 6:52