Android -- Using Array of Image Resources

Question

I have 110 images, all labeled 1, 2, 3, etc. I'd like to be able to set it up so that I can generate a random number and then display that image on the screen. The display part is fine, but I'm not sure about the array.

So far, all I've seen are arrays that require manual setup - typing in each name in XML. For 10 or 15 images, that's not bad. For 110, or thousands (in the future, hopefully), it's pretty inefficient. Is there a way to display an image based on its title, not resource ID? Ideally, I'd like to be able to title my images "ENG_1" and "SPA_1" to show different images for different languages, so it'd be nice to have it based on a String instead of an int, for searchability (if that's a word) and ease of access.

So, how would I start that?

Michael · Accepted Answer · 2011-06-14 06:09:16Z

3

Yes, there's a method Resources.getIdentifier(String name, String defType, String defPackage). You can use in the following way:

Resources resources = getResources();
int id = resources.getIdentifier("ENG_1", "drawable", getPackageName());
Drawable drawable = resources.getDrawable(id);

answered Jun 14, 2011 at 6:09

Michael

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2 Comments

anticafe Over a year ago

Should we use this method? I see many people said it'll make application slow.

Michael Over a year ago

You shouldn't if you can avoid it. But if you have no choice, then it seems to be the only solution

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