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I want to delete only 1st Child (L7jrj6dtqwrmzsc4zvt) from Firebase through an option in an Android app. I searched several places and could not find. I only found the option to delete the whole database. Can anyone help?
2 answers
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I got it with the following code:
Query queryRemoverCalendario = mCalendarioDatabaseReference.limitToFirst(1);
queryRemoverCalendario.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot removerCalendarioSnapshot : dataSnapshot.getChildren()) {
removerCalendarioSnapshot.getRef().removeValue();
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
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You will need to read and then delete. Use limitToFirst(), passing the value 1 to catch only the first Child:
calendarioRef.limitToFirst(1).addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String childKey = dataSnapshot.getKey();
calendarioRef.child(childKey).removeValue();
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
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Rosario, thank you so much for your help. I got what I wanted.
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Glad you could. It would be nice if you could post the solution you got as an answer. It will help others who have the same problem :)
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If possible post your code. Already tried
rootRef.child("L7jrJ6DtQWrmZsC4zvT").removeValue();?– Valdeir Psr
The example shows a game calendar. I know which Child is because I have access to the Firebase console. However, the person responsible for scheduling the games does not have access to the console, so he has no way of knowing Child. I wanted him to have the option to delete a game from the list from a selection in the app.
– Rafael Said