Examples with DataSnapshot com.google.firebase.database.DataSnapshot used on opensource projects

Example 1 with DataSnapshot

use of com.google.firebase.database.DataSnapshot in project FirebaseUI-Android by firebase.

the class FirebaseIndexArray method onChildMoved.

@Override
public void onChildMoved(DataSnapshot keySnapshot, String previousChildKey) {
    String key = keySnapshot.getKey();
    int oldIndex = getIndexForKey(key);
    super.setOnChangedListener(null);
    super.onChildMoved(keySnapshot, previousChildKey);
    super.setOnChangedListener(mListener);
    if (isKeyAtIndex(key, oldIndex)) {
        DataSnapshot snapshot = mDataSnapshots.remove(oldIndex);
        int newIndex = getIndexForKey(key);
        mDataSnapshots.add(newIndex, snapshot);
        notifyChangedListeners(ChangeEventListener.EventType.MOVED, newIndex, oldIndex);
    }
}

Example 2 with DataSnapshot

use of com.google.firebase.database.DataSnapshot in project quickstart-android by firebase.

the class PostDetailActivity method postComment.

private void postComment() {
    final String uid = getUid();
    FirebaseDatabase.getInstance().getReference().child("users").child(uid).addListenerForSingleValueEvent(new ValueEventListener() {

        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            // Get user information
            User user = dataSnapshot.getValue(User.class);
            String authorName = user.username;
            // Create new comment object
            String commentText = mCommentField.getText().toString();
            Comment comment = new Comment(uid, authorName, commentText);
            // Push the comment, it will appear in the list
            mCommentsReference.push().setValue(comment);
            // Clear the field
            mCommentField.setText(null);
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
        }
    });
}

Example 3 with DataSnapshot

use of com.google.firebase.database.DataSnapshot in project SocialRec by Jkuras.

the class MainActivity method setUser.

/*
    This function sets the database to reference the current users User profile info
    When it is called, a data listener is set to the corrent db reference, and
    if there is indeed a user signed in, it will set the variable mUser equal to their
    user information.
     */
public void setUser() {
    if (mAuth.getCurrentUser() != null) {
        mfirebaseUser = mAuth.getCurrentUser();
        mDataBase = FirebaseDatabase.getInstance();
        mref = mDataBase.getReference("users/" + mfirebaseUser.getUid());
        ValueEventListener postListener = new ValueEventListener() {

            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                mUser = dataSnapshot.getValue(User.class);
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                // Getting Post failed, log a message
                Log.w(TAG, "loadPost:onCancelled", databaseError.toException());
            // ...
            }
        };
        mref.addValueEventListener(postListener);
    }
}

Example 4 with DataSnapshot

use of com.google.firebase.database.DataSnapshot in project Robot-Scouter by SUPERCILEX.

the class AppIndexingService method onDataChange.

@Override
public void onDataChange(DataSnapshot snapshot) {
    long numOfExpectedTeams = snapshot.getChildrenCount();
    if (numOfExpectedTeams == 0) {
        FirebaseAppIndex.getInstance().update();
        return;
    }
    Constants.sFirebaseTeams.addChangeEventListener(new ChangeEventListenerBase() {

        @Override
        public void onChildChanged(EventType type, DataSnapshot snapshot, int index, int oldIndex) {
            if (type == EventType.ADDED) {
                mIndexables.add(Constants.sFirebaseTeams.getObject(index).getHelper().getIndexable());
            }
            if (mIndexables.size() >= numOfExpectedTeams) {
                FirebaseAppIndex.getInstance().update(mIndexables.toArray(new Indexable[mIndexables.size()]));
                Constants.sFirebaseTeams.removeChangeEventListener(this);
            }
        }
    });
}

Example 5 with DataSnapshot

use of com.google.firebase.database.DataSnapshot in project MadMax by deviz92.

the class PayExpenseActivity method payDebtForExpense.

//money = cifra che ho a disposizione per ripianare i debiti
void payDebtForExpense(final String userID, final String expenseID, Double money) {
    myMoney = money;
    databaseReference.child("expenses").child(expenseID).addListenerForSingleValueEvent(new ValueEventListener() {

        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            String creatorID = dataSnapshot.child("creatorID").getValue(String.class);
            Double alreadyPaidByCreator = dataSnapshot.child("participants").child(creatorID).child("alreadyPaid").getValue(Double.class);
            //dice se user contribuisce o no a quella spesa
            Boolean involved = false;
            for (DataSnapshot participantSnapshot : dataSnapshot.child("participants").getChildren()) {
                //todo poi gestire caso in cui utente viene tolto dai participant alla spesa
                if (participantSnapshot.getKey().equals(userID))
                    involved = true;
            }
            //se user ha partecipato alla spesa
            if (involved) {
                //alreadyPaid = soldi già messi dallo user per quella spesa
                //dueImport = quota che user deve mettere per quella spesa
                Double alreadyPaid = dataSnapshot.child("participants").child(userID).child("alreadyPaid").getValue(Double.class);
                Log.d(TAG, "Fraction: " + Double.parseDouble(String.valueOf(dataSnapshot.child("participants").child(userID).child("fraction").getValue())));
                Double amount = dataSnapshot.child("amount").getValue(Double.class);
                Double dueImport = Double.parseDouble(String.valueOf(dataSnapshot.child("participants").child(userID).child("fraction").getValue())) * amount;
                Double stillToPay = dueImport - alreadyPaid;
                //Se questa spesa non è già stata ripagata in toto
                if (stillToPay > 0) {
                    //Se ho ancora abbastanza soldi per ripagare in toto questa spesa, la ripago in toto AL CREATOR!!
                    if (myMoney >= stillToPay) {
                        //Quota già pagata DA ME per questa spesa aumenta
                        databaseReference.child("expenses").child(expenseID).child("participants").child(userID).child("alreadyPaid").setValue(dueImport);
                        //Quota già pagata DAL CREATOR per questa spesa diminuisce, perchè gli sto dando dei soldi
                        databaseReference.child("expenses").child(expenseID).child("participants").child(creatorID).child("alreadyPaid").setValue(alreadyPaidByCreator - stillToPay);
                        //Adesso ho meno soldi a disposizione, perchè li ho usati in parte per ripagare questa spesa
                        myMoney -= stillToPay;
                    } else //Altrimenti la ripago solo in parte
                    {
                        databaseReference.child("expenses").child(expenseID).child("participants").child(userID).child("alreadyPaid").setValue(alreadyPaid + myMoney);
                        databaseReference.child("expenses").child(expenseID).child("participants").child(creatorID).child("alreadyPaid").setValue(alreadyPaidByCreator - myMoney);
                        myMoney = 0d;
                    }
                }
            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
        }
    });
}