/Java/Update a key in the firebase realtime database java

Update a key in the firebase realtime database java

myRef.orderByChild("name").equalTo("abc").runTransaction(new Transaction.Handler() {
    @Override
    public Transaction.Result doTransaction(MutableData mutableData) {
        Student s = mutableData.getValue(Student.class);
        if (s == null) {
            return Transaction.success(mutableData);
        }

        s.setAge(20);
        // Set value and report transaction success
        mutableData.setValue(s);
        return Transaction.success(mutableData);
    }

    @Override
    public void onComplete(DatabaseError databaseError, boolean b,
                           DataSnapshot dataSnapshot) {
        // Transaction completed
        Log.d(TAG, "postTransaction:onComplete:" + databaseError);
    }
});

Source: stackoverflow.com

Similar codes

0 vote325 views1 answer
Component spring
Java
0 vote356 views1 answer
How to write a line in java
Java
8 votes343 views1 answer
How to find java version linux
Java
0 vote326 views1 answer
How to insert a 0 in an array java
Java
0 vote331 views1 answer
Neither bindingresult nor plain target object for bean name spring mvc
Java
0 vote334 views1 answer
Algorithms - decision
Java
1 vote348 views1 answer
Java code to print odd number
Java
0 vote341 views1 answer
Echo java
Java
3 votes304 views1 answer
Java list length
Java
0 vote355 views1 answer
Convertir string a char java
Java