Create an individual integer for each ArrayList element?

Question

I'm developing some kind of "score tracker" app for a certain game. A user adds a certain amount of players (the number is currently unlimited) and those player names are then added to ArrayList. Then on the next activity, the user must choose a playername from a Spinner and enter a certain amount of "points" or let's say "score" for that player.

This is my current code for this:

public void submitScore(View v){
    LinearLayout lLayout = (LinearLayout) findViewById (R.id.linearLayout);
    final int position = playerList.getSelectedItemPosition();
    EditText input = (EditText) findViewById(R.id.editText1);
    final LinearLayout.LayoutParams lparams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    final TextView newTextView = new TextView(this);
    String enteredText = input.getText().toString();
    
    if (enteredText.matches(""))
    {
        emptyTextError();
    }
    else
    {
        //NEW TEXTVIEW
        newTextView.setLayoutParams(lparams);
        newTextView.setText(players.get(position) + " " + score);
        newTextView.setTextSize(20);
        lLayout.addView(newTextView);
    }
}

As you can see, a user enters a certain score and a new textview is created containing player name and current score.

Now what I want to do is implement a feature that will track score for each player.

Example: The user added 2 players, one named John and one named Jack. The user then added 20 points to John and then after a while another 20, also to john. Now the textViews should look like this:

John 20

John 40

And then if the user will add 10 points to Jack and another 20 to John, TextViews should look like this:

John 20

John 40

Jack 10

John 60

This is what I don't know what to do. How do I implement a new int variable for each ArrayList element? Or is there a better way to do this than making int variables?

I need the app to automatically generate ints accoring to ArrayList, if the ArrayList contains 5 players, 5 ints need to be created because I don't know how many players the user will enter.

Why not use a Map or a List of <Player,score> compositions? — rocketboy
– rocketboy, Commented Aug 28, 2013 at 13:48
@rocketboy I've never done anything like that, I'm still a beginner. Could you add some explanation on how to do this? Thank you — Guy
– Guy, Commented Aug 28, 2013 at 13:50

rolfl · Accepted Answer · 2013-08-28 13:49:59Z

1

You should create a class, perhaps called 'Player'. Each player will have a String value name and an int value score. Then you can add these Player instances to the array each time a new Player is created. See how to do it in the Java class toturial

answered Aug 28, 2013 at 13:49

rolfl

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2 Comments

Guy Over a year ago

Thank you, I will give it a try and let you know how it goes

chrylis -cautiouslyoptimistic- Over a year ago

Also, OP should learn about Maps and other collections at the Collections tutorial

Prabhakaran Ramaswamy · Accepted Answer · 2013-08-28 13:59:29Z

0

     class PlayerScore{

         String userName;
         int score;
         public PlayerScore(String userName, int score) {
                    this.userName = userName;
                    this.score = score;
         }

       //setter and getter

      }    

       List<PlayerScore> playerScore=new ArrayList<PlayerScore>();
       playerScore.add(new PlayerScore("John",20));
       playerScore.add(new PlayerScore("John",40));
       playerScore.add(new PlayerScore("Jack",10));
       playerScore.add(new PlayerScore("John",60));

answered Aug 28, 2013 at 13:59

Prabhakaran Ramaswamy

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1 Comment

aki Over a year ago

this is not what Matthew meant. He adds 2x20 which is 40. You are adding 40 directly. So there needs to be some audit/history property for the scores in the player object.

Community · Accepted Answer · 2017-05-23 12:21:31Z

0

Try using a Map<String,Integer>, for faster access try HashMap<~>

    Map<String, Integer> map = new HashMap<String, Integer>();
    map.put("John", 10);
    map.put("Bob", 40);

If you want to sort by name use a TreeMap. If you want to sort by score read this old thread: Sort a Map<Key, Value> by values (Java)

edited May 23, 2017 at 12:21

CommunityBot

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answered Aug 28, 2013 at 14:10

le-doude

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