How can i update my information in different location? Android Firebase

问题

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I want to update my information (firstname, middlename, lastname) which is in a different location. I'm updating my information using student account. It only update under student but I don't know how to update it under teacher. If I update my first name, middle name, last name, I want my first name, middle name, and last name update also under the two section under the class. Please help me.

回答1:

To update a record in a Firebase database, you can use setValue() method directly on the reference. Assuming that teacher is the direct child of the Firebase root, you can use this code:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference firstNameRef = rootRef.child("teacher").child(teacherId).child("class").child(classId).child("Listofstudents").child(listId).child("firstname");
firstNameRef.setValue("New Name");

In which teacherId, classId and listId are those random generated keys that i see in your database.

If you want to update the same data, in a different location, just add another reference to desired location and use the same setValue() method.

Hope it helps.

来源：https://stackoverflow.com/questions/44755198/how-can-i-update-my-information-in-different-location-android-firebase