how to get string values out of strings.xml and in to an arraylist [android]

Question

Pretty much I've been trying to figure this out for the past hour.
I want to generically get strings from strings.xml and in to my code so I can dynamically change the amount of strings without having to change anything in my code that loads them in to the array list.

So far all I have is

for(Field x :R.string.class.getFields())
        if(x.getName().startsWith("ans"))
            choices.add(/*what do I add here to get the string value from the field in to the arraylist */);

I can not figure out for the life of me how to get the string value out of the field object. All I am getting is either Id's [or at least what I think is an Id] or the name I've assigned it inside the strings.xml file.

faylon · Accepted Answer · 2012-11-06 06:17:08Z

4

    Resources res = getResources();
    for(Field x :R.string.class.getFields())
        if(x.getName().startsWith("ans")){
                int id = x.get(null);
                choices.add(res.getString(id));
            }

edited Nov 6, 2012 at 6:17

answered Nov 6, 2012 at 5:47

faylon

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2 Comments

Charles Staal Over a year ago

Yeah just had to change x.get(null) and cast it as an integer and surround with a try,catch But it is the correct solution I was yearning for.

Charles Staal Over a year ago

try {choices.add(res.getString((Integer) x.get(null))); } //this gets the id and then grabs the resource associated catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e){ e.printStackTrace();} }

Sergey Dmitriev · Accepted Answer · 2012-11-06 05:57:12Z

1

Create an XML file example.xml in res/xml folder

<?xml version="1.0" encoding="utf-8"?>
<data>
    <record name="foo" />
</data>

then parse it as shown below

XmlResourceParser xrp = context.getResources().getXml(R.xml.example);
try {
  int eventType = xrp.next();
  while (eventType != XmlPullParser.END_DOCUMENT) {
    if (eventType == XmlPullParser.START_TAG && xrp.getName().equalsIgnoreCase("record")) {

      String name = xrp.getAttributeValue(null, "name");

      //choices.add(name);
    }

    eventType = xrp.next();
  }
} catch (XmlPullParserException e) {
  e.printStackTrace();
} catch (IOException e) {
  e.printStackTrace();
}

answered Nov 6, 2012 at 5:57

Sergey Dmitriev

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1 Comment

Charles Staal Over a year ago

This is way too much effort. I wanted to use reflection. Faylons answer is the correct solution for my needs.

Akash Patra · Accepted Answer · 2012-11-06 05:57:43Z

0

You can try this :

 choices.add(getResources().getString(R.string.string1));

string1 is a string constant in strings.xml

answered Nov 6, 2012 at 5:57

Akash Patra

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1 Comment

Charles Staal Over a year ago

Not generic enough. I want to add from a loop, not from a bunch of add() statements with the ID's hardcoded in, it causes maintenance issues.

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