Utilisez DatabaseReference
dans un autre DatabaseReference
:
// any way you managed to go the node that has the 'grp_key'
DatabaseReference MembersRef = FirebaseDatabase.getInstance()
.getReference()
.child("Members")
.child("1CkPG20Tt2dzrVkYkdfCLo")
.orderByKey().equalTo("-KYnhiAucnasdkadNC")
.addValueEventListener(
new ValueEventListener()
{
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
for (DataSnapshot child : dataSnapshot.getChildren())
{
Map<String, Object> valuesMap = (HashMap<String, Object>) dataSnapshot.getValue();
// Get push id value.
String key = valuesMap.get("grp_key");
// HERE WHAT CORRESPONDS TO JOIN
DatabaseReference chatGroupRef = FirebaseDatabase.getInstance().getReference()
.child("Chat_groups")
.orderByKey().equalTo(key)
.addValueEventListener(
new ValueEventListener()
{
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
// repeat!!
}
@Override
public void onCancelled(DatabaseError databaseError)
{
}
}
)
}
}
@Override
public void onCancelled(DatabaseError databaseError)
{
}
}
);
Voir aussi https://groups.google.com/forum/#!searchin/firebase -talk/join | trier: date/firebase-talk/DKnBnI0bqoI/YMrp-L1hBgAJ – Kato