android如何生成firebaseuid

我正在尝试在Firebase后端中存储数据(而非用户).如何生成Firebase唯一标识符并将其存储在孩子中？我一直在使用firebase(DatabaseReference Key)作为记录螺母的唯一标识符,该键为null.

解决方法:

您可以使用push().getKey()获得唯一密钥

FirebaseDatabase database = FirebaseDatabase.getInstance();
String key = database.getReference("todoList").push().getKey();
Map childUpdates = new HashMap<>();
childUpdates.put( key, todo.toFirebaseObject());
database.getReference("todoList").updateChildren(childUpdates, new DatabaseReference.CompletionListener() {
@Override
public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
if (databaseError == null) {
}
}
});


docs下的“更新特定字段”部分对此进行了说明.

This example uses push() to create a post in the node containing posts
for all users at /posts/$postid and simultaneously retrieve the key

with getKey(). The key can then be used to create a second entry in

the user’s posts at /user-posts/$userid/$postid.