Question

I like to display some strings from a string array in to a Textview, randomly. I am using the following code for that, But the problem is that most of the time some string is displayed repeatedly.What I want is the strings once displayed should not be displayed again.I have spent hours in searching for the code, but none of them work for me. Kindly help. Thanks in advance.

public void GetQuotes(View view) {
     Resources res = getResources();
            myString = res.getStringArray(R.array.Array);
            String q = myString[rgenerator.nextInt(myString.length)];                               
            TextView tv = (TextView)findViewById(R.id.textView1);               
            tv.setText(q);  

Answer 1

Java has built in array shuffling method, put all your items into a list, shuffle it randomly, and get the first element till it has elements. If empty, add all elements again, and shuffle again:

private List<String> myString;

public void GetQuotes(View view) {
    Resources res = getResources();
    if (myString==null || myString.size()==0) {
        myString = new ArrayList<String>();
        Collections.addAll(myString, res.getStringArray(R.array.Array));
        Collections.shuffle(myString); //randomize the list
    }
    String q = myString.remove(0);
    TextView tv = (TextView)findViewById(R.id.textView1);
    tv.setText(q);
}