/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

1 vote117 views2 answers
Java 8 validate based on pair of strings
Java
1 vote139 views1 answer
5:26 java: package javafx.application does not exist
Java
-1 vote113 views2 answers
Java map create with values
Java
0 vote127 views1 answer
Intent flag clear task
Java
0 vote117 views1 answer
Which package contains the Math classin java?
Java
0 vote112 views1 answer
Most common exceptions in java
Java
0 vote109 views1 answer
Install java centos 8
Java
0 vote67 views1 answer
Javafx fxmlloader location is not set
Java
0 vote112 views1 answer
Trivers json node as node type2
Java
32 votes116 views6 answers
Loops in java
Java