我可以保存其他类型的字符串Firebase虽然。我只是使用下面的代码。 问题是 位置字段是什么数据类型？
Firebase ref = new Firebase（myfirebaselink.firebaseio/）; $ b $ //用户 alan =新用户（Alan Turing，1912）; alanRef.setValue（obj）;我试过 location c $ c> List< String> ，但没有奏效 - 位置字段如下所示：
编辑：在更多的研究中，发现这个由Google发布的博文，但它们也保存为 latitude1和经度。这可能是在 GeoFire`被引入之前写的。 GeoFire for Java项目有一个很棒的自述文件，涵盖（除其他外）设置位置数据：
在GeoFire您可以通过字符串键设置和查询位置。要为某个键设置位置，只需调用 setLocation（）方法即可。该方法将一个键作为字符串传递，并将位置作为包含位置经纬度的 GeoLocation 对象：
geoFire.setLocation（firebase-hq，new GeoLocation（37.7853889，-122.4056973））;
要检查写入是否成功保存在服务器上，可以向 setLocation（）调用中添加 GeoFire.CompletionListener ：
geoFire.setLocation（firebase-hq，new GeoLocation（37.7853889，-122.4056973），new GeoFire.CompletionListener（）{，
@Override public void onComplete（String key，FirebaseError error）{ if（error！= null）{ System.err.println（将位置保存到GeoFire： + error; } else { System.out.println（成功保存在服务器上的位置！）; } } }）;
要删除某个位置并将其从数据库中删除，只需传递位置key to removeLocation：
geoFire.removeLocation（firebase-hq）;
I am trying to save location (so latitide and longitude) as one of the keys/fields in Firebase. In their example SFVehicles, they do show how to query once the information is stored but my problem is how do i save in the first place.
In their blog post, GeoFire goes Mobile, they are showing how the data would look like - but how do I get that location field populated?
I am able to save other types of strings to the Firebase though. I just use the code below. Question is What data type should the location field be?
Firebase ref = new Firebase("myfirebaselink.firebaseio/"); //User alan = new User("Alan Turing", 1912); alanRef.setValue(obj);I tried location to be a List<String>, but that did not work -- the location field looked like below:
Edit: On more research, found this blog post by Google but they are also saving as keys latitude1 andlongitude. This probably was written beforeGeoFire` was introduced.
解决方案The GeoFire for Java project has a great README, that covers (amongst other) setting location data:
In GeoFire you can set and query locations by string keys. To set a location for a key simply call the setLocation() method. The method is passed a key as a string and the location as a GeoLocation object containing the location's latitude and longitude:
geoFire.setLocation("firebase-hq", new GeoLocation(37.7853889, -122.4056973));
To check if a write was successfully saved on the server, you can add a GeoFire.CompletionListener to the setLocation() call:
geoFire.setLocation("firebase-hq", new GeoLocation(37.7853889, -122.4056973), new GeoFire.CompletionListener() { @Override public void onComplete(String key, FirebaseError error) { if (error != null) { System.err.println("There was an error saving the location to GeoFire: " + error); } else { System.out.println("Location saved on server successfully!"); } } });
To remove a location and delete it from the database simply pass the location's key to removeLocation:
geoFire.removeLocation("firebase-hq");
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