/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 vote214 views1 answer
Computeifabsent hashmap java
Java
0 vote184 views1 answer
Setcontentview in java
Java
0 vote195 views1 answer
How to remove all items from alist in java
Java
16 votes177 views1 answer
Check if map contains key java
Java
0 vote198 views1 answer
Delet file from path android
Java
1 vote218 views1 answer
Java execute funtions at same time
Java
0 vote181 views1 answer
String to int error
Java
0 vote189 views2 answers
Java map to list or array
Java
0 vote182 views3 answers
Zweidimensionales array ausgeben java
Java
14 votes221 views3 answers
Arraylist add method
Java