How to randomly select from a string-array list

Question

I have a list of string arrays:

<string-array name="chapter_1">
      <item>......</item>
      .           
      .
      .
      .
</string-array>

<string-array name="chapter_2">
      <item>......</item>
      .           
      .
      .
      .
</string-array>

etc. I have a random int chapter_no.

I have a line:

String chapter_name = "chapter_" + chapter_no;

Now I want to get an array of strings corresponding to chapter_no.

I know that I cannot do this:

String [] chapter =. GetResources () getStringArray (R.array.chapter_name);

How can I access string arrays randomly? Please help me.

Answer 1

Try the following

UPDATE

int id = getResources().getIdentifier(chapter_name, "array",this.getPackageName()); 
String[] chapter = getResources().getStringArray(id);

Hope this helps you.

Answer 2

Get a random line from chapter_array.

String[] chapter = getResources().getStringArray(R.array.chapter_name);

String randomString = chapter[new Random(chapter.length).nextInt()];

[Update]

        String[] data;

        //first of all give all resources to arrays
        int[] arrays = {R.string.chapter_1, R.string.chapter_2};

        //then we are fetching any one string array resources randomly
        int chapter_no = arrays[new Random(arrays.length).nextInt()];

        //From above we got any one random resource string..So we fetch all string items from that resource into data array
        data = getResources().getStringArray(chapter_no);

        //Now from that data array we fetch any one random string.
        String randomString = data[new Random(data.length).nextInt()];

[updated]

    String[] data;
    int[] arrays = {R.array.chapter_1, R.array.chapter_2};
    int chapter_no = arrays[new Random().nextInt(arrays.length-1)];
    data = getResources().getStringArray(chapter_no);
    String randomString = data[new Random().nextInt(data.length-1)];
    Toast.makeText(this, randomString, Toast.LENGTH_SHORT).show();

Answer 3

, .

int[] arrays = {R.array.chapter_1,....};

.

 Random random = new Random();
 int chapter_no = arrays[random.nextInt(arrays.length)];

Answer 4

2 , , :

Random random = new Random();

int chapter_no = random.nextInt(2) + 1;
String chapter_name = "chapter_" + chapter_no;

This function Random, which I set above, will get values ​​up to number 2.

I hope this helps you!

Answer 5

You can do it:

String[] chapter = getResources().getStringArray(R.array.chapter_1);
String[] chapter2 = getResources().getStringArray(R.array.chapter_2);
Random rand=new Random();
int randomNo=rand.nextInt();


ArrayList<String> temp = new ArrayList<String>();
temp.addAll(Arrays.asList(chapter));
temp.addAll(Arrays.asList(chapter2));
String [] concatedArgs = temp.toArray(new String[chapter.length+chapter2.length]);
String item=concatedArgs[randomNo];