how to get only keys from firebase and put it inside recyclerview
-1
i have this data structure to create bus schedules and provide the timings. i am not sure on how can i get the keys to get the timing
"Schedules" : {
"Apu-to-vista" : {
"11:00" : "true",
"12:00" : "true",
"13:00" : "true",
"13:30" : "true",
"14:00" : "true",
"14:30" : "true",
"15:00" : "true",
"15:30" : "true",
"16:00" : "true",
"16:30" : "true",
"17:00" : "true",
"17:30" : "true",
"18:00" : "true",
"18:30" : "true",
"19:00" : "true",
"20:30" : "true"
},
"vista-to-apu" : {
"11:35" : "true",
"12:00" : "true",
"13:00" : "true",
"13:15" : "true",
"14:00" : "true",
"14:30" : "true",
"15:00" : "true",
"15:30" : "true",
"16:00" : "true",
"16:30" : "true",
"17:00" : "true",
"17:30" : "true",
"18:00" : "true",
"18:30" : "true",
"19:20" : "true",
"20:30" : "true"
}
}
I want to get the keys if i do mDatabase.getReference("Schedules").child("Apu-to-vista")
this is what i tried so far
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.vista, container, false);
mDatabase = FirebaseDatabase.getInstance();
fromAPU = mDatabase.getReference("Schedules").child("Apu-to-vista");
toAPU = mDatabase.getReference("Schedules").child("Vista-to-apu");
recyclerView = (RecyclerView) view.findViewById(R.id.fromAPURecycler);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
adapter = new FirebaseRecyclerAdapter<Schedule, ViewHolder>(
Schedule.class, R.layout.card_view, ViewHolder.class, toAPU.orderByKey()
){
@Override
protected void populateViewHolder(ViewHolder viewHolder, Schedule model, int position) {
viewHolder.mTime.setText(getRef(position).getKey());
}
};
recyclerView.setAdapter(adapter);
return view;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public final TextView mTime;
public ViewHolder(View itemView) {
super(itemView);
mTime = (TextView) itemView.findViewById(R.id.text_holder);
}
}
ive tried using firebase recycler adapter create the class consist of only String timeText, and putting it into recyclerview. however there is an error
the error said no adapter attached: skipping layout
i am just beginner in android, can someone help me. thank you
java
android firebase firebase-realtime-database android-recyclerview asked Nov 18 '18 at 5:09
Amam MustofaAmam Mustofa
247
add a comment |
-1
i have this data structure to create bus schedules and provide the timings. i am not sure on how can i get the keys to get the timing
"Schedules" : {
"Apu-to-vista" : {
"11:00" : "true",
"12:00" : "true",
"13:00" : "true",
"13:30" : "true",
"14:00" : "true",
"14:30" : "true",
"15:00" : "true",
"15:30" : "true",
"16:00" : "true",
"16:30" : "true",
"17:00" : "true",
"17:30" : "true",
"18:00" : "true",
"18:30" : "true",
"19:00" : "true",
"20:30" : "true"
},
"vista-to-apu" : {
"11:35" : "true",
"12:00" : "true",
"13:00" : "true",
"13:15" : "true",
"14:00" : "true",
"14:30" : "true",
"15:00" : "true",
"15:30" : "true",
"16:00" : "true",
"16:30" : "true",
"17:00" : "true",
"17:30" : "true",
"18:00" : "true",
"18:30" : "true",
"19:20" : "true",
"20:30" : "true"
}
}
I want to get the keys if i do mDatabase.getReference("Schedules").child("Apu-to-vista")
this is what i tried so far
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.vista, container, false);
mDatabase = FirebaseDatabase.getInstance();
fromAPU = mDatabase.getReference("Schedules").child("Apu-to-vista");
toAPU = mDatabase.getReference("Schedules").child("Vista-to-apu");
recyclerView = (RecyclerView) view.findViewById(R.id.fromAPURecycler);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
adapter = new FirebaseRecyclerAdapter<Schedule, ViewHolder>(
Schedule.class, R.layout.card_view, ViewHolder.class, toAPU.orderByKey()
){
@Override
protected void populateViewHolder(ViewHolder viewHolder, Schedule model, int position) {
viewHolder.mTime.setText(getRef(position).getKey());
}
};
recyclerView.setAdapter(adapter);
return view;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public final TextView mTime;
public ViewHolder(View itemView) {
super(itemView);
mTime = (TextView) itemView.findViewById(R.id.text_holder);
}
}
ive tried using firebase recycler adapter create the class consist of only String timeText, and putting it into recyclerview. however there is an error
the error said no adapter attached: skipping layout
i am just beginner in android, can someone help me. thank you
java
android firebase firebase-realtime-database android-recyclerview asked Nov 18 '18 at 5:09
Amam MustofaAmam Mustofa
247
What doesgetRef(position).getKey()return?
– Alex Mamo
Nov 18 '18 at 11:44
i tried to logged it but it doesnt give me anything, since the error catched no adapter attached
– Amam Mustofa
Nov 18 '18 at 12:54
This is a recommended way in which you can retrieve data from a Firebase Realtime database and display it in aRecyclerViewusingFirebaseRecyclerAdapter.
– Alex Mamo
Nov 19 '18 at 7:32
add a comment |
-1
-1
-1
i have this data structure to create bus schedules and provide the timings. i am not sure on how can i get the keys to get the timing
"Schedules" : {
"Apu-to-vista" : {
"11:00" : "true",
"12:00" : "true",
"13:00" : "true",
"13:30" : "true",
"14:00" : "true",
"14:30" : "true",
"15:00" : "true",
"15:30" : "true",
"16:00" : "true",
"16:30" : "true",
"17:00" : "true",
"17:30" : "true",
"18:00" : "true",
"18:30" : "true",
"19:00" : "true",
"20:30" : "true"
},
"vista-to-apu" : {
"11:35" : "true",
"12:00" : "true",
"13:00" : "true",
"13:15" : "true",
"14:00" : "true",
"14:30" : "true",
"15:00" : "true",
"15:30" : "true",
"16:00" : "true",
"16:30" : "true",
"17:00" : "true",
"17:30" : "true",
"18:00" : "true",
"18:30" : "true",
"19:20" : "true",
"20:30" : "true"
}
}
I want to get the keys if i do mDatabase.getReference("Schedules").child("Apu-to-vista")
this is what i tried so far
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.vista, container, false);
mDatabase = FirebaseDatabase.getInstance();
fromAPU = mDatabase.getReference("Schedules").child("Apu-to-vista");
toAPU = mDatabase.getReference("Schedules").child("Vista-to-apu");
recyclerView = (RecyclerView) view.findViewById(R.id.fromAPURecycler);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
adapter = new FirebaseRecyclerAdapter<Schedule, ViewHolder>(
Schedule.class, R.layout.card_view, ViewHolder.class, toAPU.orderByKey()
){
@Override
protected void populateViewHolder(ViewHolder viewHolder, Schedule model, int position) {
viewHolder.mTime.setText(getRef(position).getKey());
}
};
recyclerView.setAdapter(adapter);
return view;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public final TextView mTime;
public ViewHolder(View itemView) {
super(itemView);
mTime = (TextView) itemView.findViewById(R.id.text_holder);
}
}
ive tried using firebase recycler adapter create the class consist of only String timeText, and putting it into recyclerview. however there is an error
the error said no adapter attached: skipping layout
i am just beginner in android, can someone help me. thank you
java
android firebase firebase-realtime-database android-recyclerview asked Nov 18 '18 at 5:09
Amam MustofaAmam Mustofa
247
i have this data structure to create bus schedules and provide the timings. i am not sure on how can i get the keys to get the timing
"Schedules" : {
"Apu-to-vista" : {
"11:00" : "true",
"12:00" : "true",
"13:00" : "true",
"13:30" : "true",
"14:00" : "true",
"14:30" : "true",
"15:00" : "true",
"15:30" : "true",
"16:00" : "true",
"16:30" : "true",
"17:00" : "true",
"17:30" : "true",
"18:00" : "true",
"18:30" : "true",
"19:00" : "true",
"20:30" : "true"
},
"vista-to-apu" : {
"11:35" : "true",
"12:00" : "true",
"13:00" : "true",
"13:15" : "true",
"14:00" : "true",
"14:30" : "true",
"15:00" : "true",
"15:30" : "true",
"16:00" : "true",
"16:30" : "true",
"17:00" : "true",
"17:30" : "true",
"18:00" : "true",
"18:30" : "true",
"19:20" : "true",
"20:30" : "true"
}
}
I want to get the keys if i do mDatabase.getReference("Schedules").child("Apu-to-vista")
this is what i tried so far
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.vista, container, false);
mDatabase = FirebaseDatabase.getInstance();
fromAPU = mDatabase.getReference("Schedules").child("Apu-to-vista");
toAPU = mDatabase.getReference("Schedules").child("Vista-to-apu");
recyclerView = (RecyclerView) view.findViewById(R.id.fromAPURecycler);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
adapter = new FirebaseRecyclerAdapter<Schedule, ViewHolder>(
Schedule.class, R.layout.card_view, ViewHolder.class, toAPU.orderByKey()
){
@Override
protected void populateViewHolder(ViewHolder viewHolder, Schedule model, int position) {
viewHolder.mTime.setText(getRef(position).getKey());
}
};
recyclerView.setAdapter(adapter);
return view;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public final TextView mTime;
public ViewHolder(View itemView) {
super(itemView);
mTime = (TextView) itemView.findViewById(R.id.text_holder);
}
}
ive tried using firebase recycler adapter create the class consist of only String timeText, and putting it into recyclerview. however there is an error
the error said no adapter attached: skipping layout
i am just beginner in android, can someone help me. thank you
java
android firebase firebase-realtime-database android-recyclerview java
android firebase firebase-realtime-database android-recyclerview asked Nov 18 '18 at 5:09
Amam MustofaAmam Mustofa
247
asked Nov 18 '18 at 5:09
Amam MustofaAmam Mustofa
247
edited Nov 18 '18 at 7:15
Amam Mustofa
asked Nov 18 '18 at 5:09
Amam MustofaAmam Mustofa
247
asked Nov 18 '18 at 5:09
Amam MustofaAmam Mustofa
247
asked Nov 18 '18 at 5:09
Amam MustofaAmam Mustofa
247
247
What doesgetRef(position).getKey()return?
– Alex Mamo
Nov 18 '18 at 11:44
i tried to logged it but it doesnt give me anything, since the error catched no adapter attached
– Amam Mustofa
Nov 18 '18 at 12:54
This is a recommended way in which you can retrieve data from a Firebase Realtime database and display it in aRecyclerViewusingFirebaseRecyclerAdapter.
– Alex Mamo
Nov 19 '18 at 7:32
add a comment |
What doesgetRef(position).getKey()return?
– Alex Mamo
Nov 18 '18 at 11:44
i tried to logged it but it doesnt give me anything, since the error catched no adapter attached
– Amam Mustofa
Nov 18 '18 at 12:54
This is a recommended way in which you can retrieve data from a Firebase Realtime database and display it in aRecyclerViewusingFirebaseRecyclerAdapter.
– Alex Mamo
Nov 19 '18 at 7:32
What does
getRef(position).getKey() return?– Alex Mamo
Nov 18 '18 at 11:44
What does
getRef(position).getKey() return?– Alex Mamo
Nov 18 '18 at 11:44
i tried to logged it but it doesnt give me anything, since the error catched no adapter attached
– Amam Mustofa
Nov 18 '18 at 12:54
i tried to logged it but it doesnt give me anything, since the error catched no adapter attached
– Amam Mustofa
Nov 18 '18 at 12:54
This is a recommended way in which you can retrieve data from a Firebase Realtime database and display it in a
RecyclerView using FirebaseRecyclerAdapter.– Alex Mamo
Nov 19 '18 at 7:32
This is a recommended way in which you can retrieve data from a Firebase Realtime database and display it in a
RecyclerView using FirebaseRecyclerAdapter.– Alex Mamo
Nov 19 '18 at 7:32
add a comment |
1 Answer
1
active
oldest
votes
0
To get the keys from Apu-to-vista:
fromAPU.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot apuToVistaSnapshot) {
for (DataSnapshot scheduleSnapshot : apuToVistaSnapshot.getChildren()){
String key = scheduleSnapshot.getKey();
// Do whatever you want with this key
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
Firebase sends you the data wrapped in a DataSnapshotobject. After the call of addListenerForSingleValueEvent() on the fromAPU reference Firebase will send you the apuToVistaSnapshot which includes all the data of the "Apu-to-vista" node.
By calling getChildren() on that reference you can iterate through its child DataSnapshotinstances and get the key from each one.
answered Nov 18 '18 at 14:51
SkemelioSkemelio
753414
yes, i tried to logged it and it works, however my next problem is how to put it into my adapter on recycler view
– Amam Mustofa
Nov 19 '18 at 4:01
If you've tried and it works as you said, you should upvote to mark this answer as useful if not correct (where you should mark it as correct). This is how this community works.
– Skemelio
Nov 19 '18 at 10:49
Okay, thank you
– Amam Mustofa
Nov 20 '18 at 8:11
add a comment |
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1 Answer
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votes
0
To get the keys from Apu-to-vista:
fromAPU.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot apuToVistaSnapshot) {
for (DataSnapshot scheduleSnapshot : apuToVistaSnapshot.getChildren()){
String key = scheduleSnapshot.getKey();
// Do whatever you want with this key
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
Firebase sends you the data wrapped in a DataSnapshotobject. After the call of addListenerForSingleValueEvent() on the fromAPU reference Firebase will send you the apuToVistaSnapshot which includes all the data of the "Apu-to-vista" node.
By calling getChildren() on that reference you can iterate through its child DataSnapshotinstances and get the key from each one.
answered Nov 18 '18 at 14:51
SkemelioSkemelio
753414
yes, i tried to logged it and it works, however my next problem is how to put it into my adapter on recycler view
– Amam Mustofa
Nov 19 '18 at 4:01
If you've tried and it works as you said, you should upvote to mark this answer as useful if not correct (where you should mark it as correct). This is how this community works.
– Skemelio
Nov 19 '18 at 10:49
Okay, thank you
– Amam Mustofa
Nov 20 '18 at 8:11
add a comment |
0
To get the keys from Apu-to-vista:
fromAPU.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot apuToVistaSnapshot) {
for (DataSnapshot scheduleSnapshot : apuToVistaSnapshot.getChildren()){
String key = scheduleSnapshot.getKey();
// Do whatever you want with this key
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
Firebase sends you the data wrapped in a DataSnapshotobject. After the call of addListenerForSingleValueEvent() on the fromAPU reference Firebase will send you the apuToVistaSnapshot which includes all the data of the "Apu-to-vista" node.
By calling getChildren() on that reference you can iterate through its child DataSnapshotinstances and get the key from each one.
answered Nov 18 '18 at 14:51
SkemelioSkemelio
753414
yes, i tried to logged it and it works, however my next problem is how to put it into my adapter on recycler view
– Amam Mustofa
Nov 19 '18 at 4:01
If you've tried and it works as you said, you should upvote to mark this answer as useful if not correct (where you should mark it as correct). This is how this community works.
– Skemelio
Nov 19 '18 at 10:49
Okay, thank you
– Amam Mustofa
Nov 20 '18 at 8:11
add a comment |
0
0
0
To get the keys from Apu-to-vista:
fromAPU.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot apuToVistaSnapshot) {
for (DataSnapshot scheduleSnapshot : apuToVistaSnapshot.getChildren()){
String key = scheduleSnapshot.getKey();
// Do whatever you want with this key
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
Firebase sends you the data wrapped in a DataSnapshotobject. After the call of addListenerForSingleValueEvent() on the fromAPU reference Firebase will send you the apuToVistaSnapshot which includes all the data of the "Apu-to-vista" node.
By calling getChildren() on that reference you can iterate through its child DataSnapshotinstances and get the key from each one.
answered Nov 18 '18 at 14:51
SkemelioSkemelio
753414
To get the keys from Apu-to-vista:
fromAPU.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot apuToVistaSnapshot) {
for (DataSnapshot scheduleSnapshot : apuToVistaSnapshot.getChildren()){
String key = scheduleSnapshot.getKey();
// Do whatever you want with this key
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
Firebase sends you the data wrapped in a DataSnapshotobject. After the call of addListenerForSingleValueEvent() on the fromAPU reference Firebase will send you the apuToVistaSnapshot which includes all the data of the "Apu-to-vista" node.
By calling getChildren() on that reference you can iterate through its child DataSnapshotinstances and get the key from each one.
answered Nov 18 '18 at 14:51
SkemelioSkemelio
753414
answered Nov 18 '18 at 14:51
SkemelioSkemelio
753414
answered Nov 18 '18 at 14:51
SkemelioSkemelio
753414
answered Nov 18 '18 at 14:51
SkemelioSkemelio
753414
753414
yes, i tried to logged it and it works, however my next problem is how to put it into my adapter on recycler view
– Amam Mustofa
Nov 19 '18 at 4:01
If you've tried and it works as you said, you should upvote to mark this answer as useful if not correct (where you should mark it as correct). This is how this community works.
– Skemelio
Nov 19 '18 at 10:49
Okay, thank you
– Amam Mustofa
Nov 20 '18 at 8:11
add a comment |
yes, i tried to logged it and it works, however my next problem is how to put it into my adapter on recycler view
– Amam Mustofa
Nov 19 '18 at 4:01
If you've tried and it works as you said, you should upvote to mark this answer as useful if not correct (where you should mark it as correct). This is how this community works.
– Skemelio
Nov 19 '18 at 10:49
Okay, thank you
– Amam Mustofa
Nov 20 '18 at 8:11
yes, i tried to logged it and it works, however my next problem is how to put it into my adapter on recycler view
– Amam Mustofa
Nov 19 '18 at 4:01
yes, i tried to logged it and it works, however my next problem is how to put it into my adapter on recycler view
– Amam Mustofa
Nov 19 '18 at 4:01
If you've tried and it works as you said, you should upvote to mark this answer as useful if not correct (where you should mark it as correct). This is how this community works.
– Skemelio
Nov 19 '18 at 10:49
If you've tried and it works as you said, you should upvote to mark this answer as useful if not correct (where you should mark it as correct). This is how this community works.
– Skemelio
Nov 19 '18 at 10:49
Okay, thank you
– Amam Mustofa
Nov 20 '18 at 8:11
Okay, thank you
– Amam Mustofa
Nov 20 '18 at 8:11
add a comment |
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What does
getRef(position).getKey()return?– Alex Mamo
Nov 18 '18 at 11:44
i tried to logged it but it doesnt give me anything, since the error catched no adapter attached
– Amam Mustofa
Nov 18 '18 at 12:54
This is a recommended way in which you can retrieve data from a Firebase Realtime database and display it in a
RecyclerViewusingFirebaseRecyclerAdapter.– Alex Mamo
Nov 19 '18 at 7:32