Access variables by name in a loop

Question

I'm working on an Android project, and i have a lot of drawables. These drawables are all named like icon_0.png, icon_1.png ... icon_100.png. I want to add all the resource id's of these drawables to an ArrayList of Integers. (For those, who do not know android, only Java, i am talking about static variables, in a static inner class of a class, like R.drawable.icon_0. All of this static variables are Integers.)

Is there a more efficient way to do this, than adding them one by one? Like

ArrayList<Integer> list = new ArrayList<Integer>();
list.add(R.drawable.icon_1);
list.add(R.drawable.icon_2);
...
list.add(R.drawable.icon_100);

Can i loop through them somehow? Like

for(int i=0; i<100; i++)
{
    list.add(R.drawable.icon_+i);  //<--- I know this doesn't work.
}

I have no control over the file where these static integers are, and i cannot create the drawables in runtime.

Any help would be appreciated!

EDIT

Okay, i read the answers, but i have one major problem: I don't have access to any Context instances where i need to create this array/list of ids (i do it in a static initialzer block), so the getResources() method, what two of the answers suggested wont work. Is there any other way of doing this?

Answer 1

Create an XML file in the values folder in your resource directory.

<?xml version="1.0" encoding="utf-8"?>
<resources>
<array name="myIcons">
    <item>@drawable/icon1</item>
    <item>@drawable/icon2</item>
    <item>@drawable/icon3</item>
    <item>@drawable/icon4</item>
    <item>@drawable/icon5</item>
    ...
    ...
</array>
</resources>

Go through the following code, you will get the idea.

Resources res = getResources();
TypedArray myIcons= res.obtainTypedArray(R.array.myIcons);  //mentioned  in the XML
for(int i=0; i<100; i++)
{
    Drawable drawable = myIcons.getDrawable(i);
    list.add(drawable);  
}