CODEWITHSUNDEEP
javaandroid
Martin D
Martin D

Reputation: 33

How to display multiple values in a textView

I can't get String Builder to work properly for me, I know the values generated work but only the last one is added into the textView.

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_game);

    Intent newGame = getIntent();
    int temp = newGame.getIntExtra("int_value", 0); // here 0 is the default value

    Random r = new Random();
    int Low = 1;
    int High = 4;
    int Result = r.nextInt(High-Low) +Low;

    int[] numbers = new int [1];
    for(int Generated = 0; Generated < numbers.length; Generated++) {
        numbers[Generated] = (int)(Math.random() +temp);
    }
    int value;
    for (int rolls = 0; rolls < 4 +temp; rolls++) {
        value = (int) (Math.random() * 4 + 1);
        //Test if numbers generated are correct
        // Create the text view
        TextView textView = new TextView(this);
        textView.setTextSize(40);
        StringBuilder builder = new StringBuilder();
            builder.append(value + " ");
            textView.setText(builder.toString());


            // Set the text view as the activity layout
            setContentView(textView);
            //store generated numbers here
            System.out.println(value);
    }
}

In System.out.println(value); I can see the numbers generated but the textView only shows the last one.

Upvotes: 2

Views: 2535

Answers (2)

Nemeas
Nemeas

Reputation: 129

So, what you want to do is use the StringBuilder to build up your string in the loop. Then set the value of the StringBuilder to the textView after the loop. Like this_:

StringBuilder builder = new StringBuilder();

for (int rolls = 0; rolls < 4 +temp; rolls++) {
    value = (int) (Math.random() * 4 + 1);
    builder.append(value + " ");
    System.out.println(value);
}

TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(builder.toString());

// Set the text view as the activity layout
setContentView(textView);

Upvotes: 0

walkmn
walkmn

Reputation: 2391

Try edit like this:

StringBuilder builder = new StringBuilder();

for (int rolls = 0; rolls < 4 +temp; rolls++) {
    value = (int) (Math.random() * 4 + 1);
    //Test if numbers generated are correct
    // Create the text view
    TextView textView = new TextView(this);
    textView.setTextSize(40);
    builder.append(value + " ");
    textView.setText(builder.toString());

    // Set the text view as the activity layout
    setContentView(textView);
    //store generated numbers here
    System.out.println(value);
}

Upvotes: 2

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