how to read items from string-array on android

Question

I got a problem with reading items from string-array one by one. For example, i got string-array with 10 items:

<string-array name="arr">
    <item>First</item>
    <item>Second</item>
    <item>...</item>
    <item>Tenth</item>
</string-array>

So i know how to display items randomly, im using this code

Resources res = getResources();

myString = res.getStringArray(R.array.arr);

int length=myString.length;
int index=rgenerator.nextInt(length);
String q = myString[index];

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

And in TextView on every button click it displays random item from array.

Problem is, how to make display item from string-array not randomly. Like, it starts from displaying First, then on click it displays Second, and so on untill end of array.
Please help!

Answer 1

You can't initialize your testArray field this way, because the application resources still aren't ready. Change the code to:

package com.xtensivearts.episode.seven;

import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class Episode7 extends ListActivity {
String[] mTestArray;

/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    // Create an ArrayAdapter that will contain all list items
    ArrayAdapter<String> adapter;

    mTestArray =  = getResources().getStringArray(R.array.testArray);    

    /* Assign the name array to that adapter and 
    also choose a simple layout for the list items */ 
    adapter = new ArrayAdapter<String>(
    this,
    android.R.layout.simple_list_item_1,
    mTestArray);

    // Assign the adapter to this ListActivity
    setListAdapter(adapter);
    }
}