Argthtjtr

So in my app I have 2 players in a game. Player 1 is assigned either heads or tails, and then player 2 is to be assigned the side that player 1 is not. i.e. if player 1 is heads, then player 2 is tails, and vice versa.

To check to see which side player 1 is before assigning a side to player 2, I have a callback setup to get which side player 1 has been assigned. And the callback looks like this.

public interface Player1SideCallback {

    void onCallback(String side);

}



private void player1Side(final Player1SideCallback callback) {

        FCGames.addValueEventListener(new ValueEventListener() {

            @Override

            public void onDataChange(@NonNull final DataSnapshot dataSnapshot) {

                HomePage.getCurrentGameID(new HomePage.CallbackID() {

                    @Override

                    public void onSuccess(String currentGameID) {

                            String player1Side = dataSnapshot.child(currentGameID).child("HeadsOrTails").getValue().toString();

                            callback.onCallback(player1Side);

                        }

                });

            }



            @Override

            public void onCancelled(@NonNull DatabaseError databaseError) {



            }

        });

}

It's a pretty basic callback.

Now, I am when a player clicks the join button they are assigned to the game as player 2 using this snippet:

    adapter = new MyRecyclerViewAdapter(this, openGames, new MyRecyclerViewAdapter.OnButtonClickListener() {

        @Override public void onButtonClick(String id, final int position) {

            String gameID = openGames.get(position);





            second = new User(userName, 0, getSide2(), FirebaseAuth.getInstance().getUid(), gameID, false);





            gm.setUser2(second);

            FCGames.child(gameID).child("user2").setValue(second);

            HomePage.setCurrentGame(gameID);

            HomePage.setUserPosition(2);

        }});

enter code here

As you can see, I have left line spaces around the variable second because that is where the new player is actually being created. And where it says getSide2() it is assigning a side to the player 2.

But, I am struggling to get this right. I call my callback in a method called getSide2() to try to properly assign the right side to user 2

private String getSide2() {

    player1Side(new Player1SideCallback() {

        @Override

        public void onCallback(String side) {

            if(side.equals("Heads")) {

                String side2 = "Tails";

            } else {

                String side2 = "Heads";

            }

        }

    });

}

So I want to assign the player2 the side with the variable side2 but I am not sure how to return this value from a method using a callback.

How can I use this type of logic to properly assign the correct side to user 2?