OpenGames | Collection of Open Source games for Android

When loading http://static.france24.com/live/F24_EN_LO_HLS/live_web.m3u8 using Flutter's videoplayer the app crashes, but if I load https://flutter.github.io/assets-for-api-docs/assets/videos/bee.mp4 it does not crash.. When it crashes it gives the following error:

So I have a game lobby where when a user creates a game, their username and how much in game currency they are betting on the game appears on the screen for all players to see in a RecyclerView.

So in this case, a user named 'Brent_MB' created a game

But the issue is the player put a wager of 2.00 on the game and it won't appear. (2.50 is the default number that appears)

This is what my database structure looks like

So, since this database is so dynamic, it literally changes each time someone wants to play a game and it gets deleted when the game starts, how can I go about assigning the wager value to the slot that currently says '2.50'

This is what I have tried to do:

I have created a callback for the wager variable like this,

I have a list that is being used by two separate classes. I need this list to be defined in one of my onDataChange methods however, and this is giving me some issues. At the top of my class I have my list defined as this:

I have a game lobby that adds a join button to the screen when someone creates a game. The button is added, but it doesn't appear until you leave and re-enter the page. This is the code that is adding the button and it's supposed to be updating the RecyclerView that stores the button.

I have been working on this multiplayer lobby for a few days now and I am STRUGGLING let me tell ya.

Anyways, I am reworking the problem on paper so I can have a step by step way to achieve what I am trying to do. The simple steps to my lobby are as follows:

1. A user clicks a 'create game' button
2. That button calls a createGame method which adds a node into my openGames root in my RealTime Database
3. That node has more children such as the username, the user id, the index of the game in a list, and some other things.
4. This game which is indexed in an arraylist, is drawn onto the screen through RecyclerView

So that is my current process but I am not sure if I am missing any steps. Of course there is a lot of code behind these steps but this is just the jist of things.

My question is how can I make it so that when a user creates a game, how can I have this properly added into an ArrayList that is in realtime and accessible to all users. Right now the ArrayList is not the same for all users. So if one person makes a game, that game is added to the realtime database, but it is not added to the list for each user.

How can I make a dynamic realtime ArrayList?

This is currently the method that is adding the game to the database and to the list at the same time.

Is there a simple way to count the number of nodes in a specific database in Java?

For example, I have a database with all the current open games and it looks something like this.

I am trying to make it so that when a user creates an open game, in my Firebase Database the name of the game is the size of the list. So the very first game created the name of it will = 0, and if another user creates a game then the game will be labeled 1 and so on.

I have it set up right now so that the games are labeled the size of the game list, but the list isn't really updating. The games keep getting called '0' because it thinks the list is empty even though I have visual confirmation in the app that there are items being added to the list.

So my question is: How can I make it so the list continuously updates each time a game is added, and how can I make it so that it updates for all users and not just the user who created the game?

This is what I have setup right now. Here are the variables I am using for the list and the integer getting the list size

So I am trying to make it so that when a user creates a game, the game ID is just the current size of the List the game is stored in.

This is what I am using right now to determine the game ID

So I am trying to make it so that when a user creates an open game in the game lobby, then their username and a 'join' button will appear on the lobby screen. It works right now, but the problem is it only appears for the user who created the game, it won't appear for any other user, unless another user creates a game too then both of the open games will appear but it doesn't update in real time.

I have it so that when a user creates a game, the game and some varialbes relevant to the game are added into the realtime database. And right now I have an event listener, shown below, checking for whenever the game node is updated, and when it is updated it is supposed to update the UI, but it only does it for the user who made the game.