public interface
ValueEventListener
Classes implementing this interface can be used to receive events about data changes at a
location. Attach the listener to a location user addValueEventListener(ValueEventListener).
Public Method Summary
| abstract void |
onCancelled(DatabaseError error)
This method will be triggered in the event that this listener either failed at the server, or
is removed as a result of the security and Firebase Database rules.
|
| abstract void |
onDataChange(DataSnapshot snapshot)
This method will be called with a snapshot of the data at this location.
|
Public Methods
public abstract void onCancelled (DatabaseError error)
This method will be triggered in the event that this listener either failed at the server, or is removed as a result of the security and Firebase Database rules. For more information on securing your data, see: Security Quickstart
Parameters
| error | A description of the error that occurred |
|---|
public abstract void onDataChange (DataSnapshot snapshot)
This method will be called with a snapshot of the data at this location. It will also be called each time that data changes.
Parameters
| snapshot | The current data at the location |
|---|