使用此代码
DatabaseReference mDatabase=FirebaseDatabase.getInstance().getReference().child(FirebaseAuth.getCurrentUser().getUid()).child("datos");
mDatabase.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot childDataSnapshot : dataSnapshot.getChildren()) {
switch(childDataSnapshot.getKey()){
case "genero":
//get your data with childDataSnapshot.child("value").getValue(String.class);
break;
case "naf":
break;
//more cases according possible childs
}
}
}
@Override
public void onCancelled(FirebaseError firebaseError) {
}
});