我有一个现有的应用程序,我试图转换为使用Firebase数据库.这是我尝试保存对象时使用的一些代码：

...
private FirebaseDatabase database;
private DatabaseReference waypointRef;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ...

    database = FirebaseDatabase.getInstance();
    waypointRef = database.getReference(Utils.WAYPOINT_REFERENCE);

    waypointRef.addChildEventListener(new ChildEventListener() {
        @Override
        public void onChildAdded(DataSnapshot dataSnapshot,String prevIoUsChildName) {
            FBWaypoint wp = dataSnapshot.getValue(FBWaypoint.class);
            wp.setId(dataSnapshot.getKey());
            Log.e(TAG,String.format("Child Added:  %s,%s,Prev: %s",wp.getName(),wp.getLatitude(),wp.getLongitude(),prevIoUsChildName));
        }

        @Override
        public void onChildChanged(DataSnapshot dataSnapshot,String prevIoUsChildName) {
            FBWaypoint wp = dataSnapshot.getValue(FBWaypoint.class);
            Log.e(TAG,String.format("Child Changed:  %s,prevIoUsChildName));
        }

        @Override
        public void onChildRemoved(DataSnapshot dataSnapshot) {
            FBWaypoint wp = dataSnapshot.getValue(FBWaypoint.class);
            wp.setId(dataSnapshot.getKey());
            Log.e(TAG,String.format("Child Removed:  %s,wp.getLongitude()));
        }

        @Override
        public void onChildMoved(DataSnapshot dataSnapshot,String.format("Child Moved:  %s,prevIoUsChildName));
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Log.e(TAG,"Failed to add Child Listener.",databaseError.toException());
        }
    });
    ...
}

@H_301_4@创建对象后,我将其保存为：

waypointRef.push().setValue(wp);

@H_301_4@我确实看到此时在我的日志中触发回调(以及firebase生成的id的值：

Child Added:  Hrbrbe,44.969846,-89.670527,Prev: null
Child Added:  Hdbece,44.956019,-89.666436,Prev: -KInIzqk6m96lwVWF6Pc
Child Added:  Hebdbr R,44.970372,-89.673188,Prev: -KInJ17sfsQ4v_fUrAW3

@H_301_4@但是,我没有在firebase控制台中看到这些记录的任何内容.此外,当我重新启动应用程序时,onChildAdded回调不会被触发.

@H_301_4@我还创建了另一个应用程序,它只包含上面的代码……并且工作正常.所以我不确定我在现有应用程序中做的事情是否影响了firebase？但是,我不确定那可能是什么,因为我也把我所有的依赖都放在了简单的项目中.

@H_301_4@关于我接下来可以检查什么的任何想法？

@H_301_4@更新：我按照建议添加了onComplete Listener.永远不会被召唤.如果我在setValue()之后添加了FirebaseDatabase.purgeOutstandingWrites(),则会调用onComplete并显示以下错误：

DatabaseError: The write was canceled by the user.