CODEWITHSUNDEEP
androidarraysstringrandom
user2673978
user2673978

Reputation:

Returning random String in Array per button press

I have the following situation:

I have an array with 245 String items. Now I have a Button which gives me a random String from the array when clicked. But then, I get repetition like after one string, the previous string comes. How to fix it?

Here is the code:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button btn1 = (Button)findViewById(R.id.button1);
    btn1.setOnClickListener(this);

    Resources res = getResources();

    titles = res.getStringArray(R.array.title_array); 

    String q = titles[rgenerator.nextInt(titles.length)];

    TextView tv = (TextView) findViewById(R.id.textView1);
    tv.setText(q);

    ...

}

Upvotes: 0

Views: 92

Answers (1)

Sunil Mishra
Sunil Mishra

Reputation: 3826

First convert your words array to arraylist

ArrayList<String> wordsList = new ArrayList<String>(Arrays.asList(titles));

Then create another list which holds the words that have already printed

ArrayList<String> usedList = new ArrayList<String>();

Then when you get a word just remove it from wordlist and move it to usedlist

String s = wordsList.get(rgenerator.nextInt(wordsList.size()));
wordsList.remove(s);
usedList.add(s);

Upvotes: 1

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