android - 带有Firebase的Android，如何在 child 上推送数据？

如何将push（）添加到路标子项？无法正确处理..

    Map mWaypoints = new HashMap();
    mWaypoints.put("latitude", mCurrentLatlngOnCreate.latitude);
    mWaypoints.put("longitude", mCurrentLatlngOnCreate.longitude);

    Map mParent = new HashMap();
    mParent.put("routeID", "my route id");
    mParent.put("routeName", "my route name");
    mParent.put("Waypoints", mWaypoints);

    myFirebaseRef.push().setValue(mParent);

这是当前结果，但希望在Waypoints下使用推入ID。

    -KGNWnjgXPC0kHYiOKG7
       Waypoints        // <---  Want to get the unique below here
          latitude: 31
          longitude: 421
       routeID: "my route id"
       routeName: "my route name"

最佳答案

push()是纯客户端操作，可以单独调用。所以：

Map mWaypoints = new HashMap();
mWaypoints.put("latitude", mCurrentLatlngOnCreate.latitude);
mWaypoints.put("longitude", mCurrentLatlngOnCreate.longitude);

String key = myFirebaseRef.push().getKey();
Map mWayPointsMap = new HashMap();
mWayPointsMap.put(key, mWayPoints);

Map mParent = new HashMap();
mParent.put("routeID", "my route id");
mParent.put("routeName", "my route name");
mParent.put("Waypoints", mWayPointsMap);

myFirebaseRef.push().setValue(mParent);