How to Use String as a ResourceID in Android

Question

I've several TextViews or another component, doesn't matter. And the views have iteration ids like: textView1, textView2, textView3 etc.

Simply I want to iterate ids by using pre-string values.

Psuedo example:

String pre_value = "textView";

for(int i = 0; i < size; i++) {

    String usable_resource_id = pre_value + Integer.toString(pre_value);
    // So how to use these id like R.id.textView1
    // Cast or something similar

}

Any suggestions?

You have to use reflection: [look here][1]. [1]: http://stackoverflow.com/questions/4427608/android-getting-resource-id-from-string — drakyoko, Mar 15 '12 at 19:32
This what you are willing to do is called Metaprogramming (if you ever want to know how to search for it) — Iulius Curt, Mar 15 '12 at 19:33

score 6 · Accepted Answer · edited Mar 15 '12 at 19:33

6

You can use Resources#getIdentifier() to get the identifier from a string.

But if you are going to iterate over them, wouldn't it be easier to keep the ids in an array or a list?

edited Mar 15 '12 at 19:33

Ted Hopp

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answered Mar 15 '12 at 19:30

MByD

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+1. It's worth noting that `getIdentifier()` tends to be a little slow. – Ted Hopp Mar 15 '12 at 19:33
Yep `List` is more easier, right. Actually, I need dynamically changings. So does not fit for my app. Thanks for suggestion, it worked. – Ogulcan Orhan Mar 15 '12 at 19:33

How to Use String as a ResourceID in Android

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