Loading Integer Array from xml

Question

I have an integer array in an xml file as follows

<integer-array name="myArray">
    <item>@drawable/pic1</item>
    <item>@drawable/pic2</item>
    <item>@drawable/pic3</item>
    <item>@drawable/pic4</item>
</integer-array>

In the code, I am trying to load this array

int[] picArray = getResources().getIntArray(R.array.myArray);

The expected result is

R.drawable.pic1, R.drawable.pic2,R.drawable.pic3

but instead it is coming with an array with all values as zero

Can anyone tell me what is wrong?

My Xml as follows. The java code getResources().getIntArray(R.array.myArray) gives incorrect result whereas getResources().getStringArray(R.array.myWord) is giving correct result Word1 word2 @drawable/pic1 @drawable/pic2 @drawable/pic3 — GSree, Dec 14 '10 at 23:00

Mixaz · Answer 1 · 2013-10-05T09:11:53.470

Found this solution:

TypedArray ar = context.getResources().obtainTypedArray(R.array.myArray);
int len = ar.length();

int[] picArray = new int[len];

for (int i = 0; i < len; i++)
    picArray[i] = ar.getResourceId(i, 0);

ar.recycle();

// Do stuff with resolved reference array, resIds[]...
for (int i = 0; i < len; i++)
    Log.v (TAG, "Res Id " + i + " is " + Integer.toHexString(picArray[i]));

And resources xml file could be:

<resources>
    <integer-array name="myArray">
        <item>@drawable/pic1</item>
        <item>@drawable/pic2</item>
        <item>@drawable/pic3</item>
        <item>@drawable/pic4</item>
    </integer-array>
</resources>

score 3 · Answer 2 · answered Dec 14 '10 at 22:35

3

It looks like you might be talking about typed arrays?

if so a typed array should look like this:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <array name="icons">
        <item>@drawable/home</item>
        <item>@drawable/settings</item>
        <item>@drawable/logout</item>
    </array>
    <array name="colors">
        <item>#FFFF0000</item>
        <item>#FF00FF00</item>
        <item>#FF0000FF</item>
    </array>
</resources>

Can you show us your actual xml file so we can help you?

EDIT: Yeah those are not integers. make it a resource array if you want to store resources.

answered Dec 14 '10 at 22:35

Pure Function

2,129
1
22
31

My Xml as follows. The java code getResources().getIntArray(R.array.myArray) gives incorrect result whereas getResources().getStringArray(R.array.myWord) is giving correct result Word1 word2 @drawable/pic1 @drawable/pic2 @drawable/pic3 – GSree Dec 14 '10 at 23:01
I'm still unclear as to what you're doing, your second example will give correct results because you're getting a string array which is what it expects, but your integer array in xml doesn't have integers in it it has resource paths. I think you should check out Mur Votema's answer. seems to be what you might be trying to do. – Pure Function Dec 14 '10 at 23:06
I have the list under resources.xml. Tried using array instead of Integer-array. How do I load this array object? I used getResources().getIntArray(R.array.newarrayname) and still getting same result (i.e. and array of zeros). I thought @drawable/home will be stored as int! – GSree Dec 14 '10 at 23:14
1

no its not stored as int. i can see how you would make that conclusion because in android code they are ints but only after being converted by java. when you make an int-array it has to contain ints, as in: 1, 2, 3. integer primitives. don't use getIntArray because they are not ints. you could use getstringarray if you want to store the paths in a string, but as I said I'm still unclear what you're doing and Mur Votema's link to the tutorial seems to be the type of thing you want to do. – Pure Function Dec 14 '10 at 23:25
Thanks. Now I understand. I think I should follow Mur Votema's code snippet. – GSree Dec 14 '10 at 23:34

score 2 · Accepted Answer · answered Dec 14 '10 at 22:43

2

You need to get an array with id's of your images. Probably this article helps you. And so the code you probably need:

int[] picArray = new int[4];

for (int i = 1; i <=4; i++)
{
  try 
  {
    Class res = R.drawable.class;
    Field field = res.getField("pic"+i);
    picArray[i-1] = field.getInt(null);
  }
  catch (Exception e)
  {
    Log.e("MyTag", "Failure to get drawable id.", e);
  }
}

answered Dec 14 '10 at 22:43

Tima

12,765
23
82
125

I can see reflection classes are used here. Is this the only way? Is there a way I can make getResources.getIntArray work? – GSree Dec 14 '10 at 23:06

score 1 · Answer 4 · answered Mar 29 '15 at 11:12

Just make it a normal resource array. You could do it like this:

<?xml version="1.0" encoding="utf-8"?>
<resources>
   <array name="icons">
       <item>@drawable/home</item>
       <item>@drawable/settings</item>
       <item>@drawable/logout</item>
   </array>
</resources>

Then don't make a int[] just make a TypedArray like this:

TypedArray icons = getResources().obtainTypedArray(R.array.icons);

and get it with:

imageview.setImageDrawable(mIcons.getDrawable(position));

Don't forget to `icons.recycle()` when done. – copolii Feb 02 '21 at 22:45 — copolii, Feb 02 '21 at 22:45

Loading Integer Array from xml

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