Search value for key in string-array android

Question

i have a string-array in my res/values/strings.xml

 <string-array name="my_list">  
    <item>Item1</item>
    <item>Item2</item>
</string-array>

i am accessing it in my application as and comparing it with my value in loop.

String[] myStrings = getResources().getStringArray(R.array.my_list);
for(int i=0;i<myStrings.length;i++)
{
    System.out.println(myStrings[i]);
}

Now i need the search the items according to key to get the respective item.Example

<string-array name="my_list">  
    <item name="one">Item1</item>
    <item name="two">Item2</item>
</string-array>

if my search hay key "one" then get its corresponding value(Item1).

How to accomplish this task.

Thanks

Taha Sami · Accepted Answer · 2022-05-17 13:22:45Z

22

Well, I've done it using two arrays. Easy to manage as well.

One for Keys:

<string-array name="codes">
        <item>AC</item>
        <item>AD</item>
        <item>AE</item>
</string-array>

One for Values:

<string-array name="names">
        <item>Ascension</item>
        <item>Andorra</item>
        <item>United Arab Emirates</item>
</string-array>

And the search method.

private String getCountryByCode(String code) {
        int i = -1;
        for (String cc: getResources().getStringArray(R.array.codes)) {
            i++;
            if (cc.equals(code))
                break;
        }
        return getResources().getStringArray(R.array.names)[i];
    }

Note: The code above will not work if items inside the two lists was unordered. So make sure you arranged the items.

edited May 17, 2022 at 13:22

Taha Sami

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answered Feb 20, 2015 at 20:22

AlexV

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1 Comment

Francisc0 Over a year ago

I like this solution. Not super ideal but works well.

C0deAttack · Accepted Answer · 2011-08-31 12:27:11Z

9

What you have there is a Map like data structure. Sadly there is currently no way to create a Map of Strings through XML like that.

You could either do it all in Java or write your map in a Raw XML file and read/parse that in to a map at runtime.

answered Aug 31, 2011 at 12:27

C0deAttack

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2 Comments

Rahul Bali Over a year ago

Is there a way now? Or shall I be still Sad?

Mark Over a year ago

Still be sad :( No way to do this still as far as I know. I still use AlexV's method

Divers · Accepted Answer · 2016-02-12 08:23:03Z

8

Unfortunately there is no built-in way to achive that, but you can do something like that:

   <string-array name="my_array">
        <item>key1|value1</item>
        <item>key2|value2</item>
   </string-array>

And have a util function something like:

Map<String, String> getKeyValueFromStringArray(Context ctx) {
    String[] array = ctx.getResources().getStringArray(R.array.my_array);
    Map<String, String> result = new HashMap<>();
    for (String str : array) {
        String[] splittedItem = str.split("|");
        result.put(splittedItem[0], splittedItem[1])
    }
    return result
}

It's look a little bit hacky, but in general, because you have control over your dictionary - probably it not so awful idea.

answered Feb 12, 2016 at 8:23

Divers

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1 Comment

æ-ra-code Over a year ago

+1. |->\\|. As side note, from time to time I use something like Guava's Splitter to avoid extra regexp for such simple case.

Mike Yang · Accepted Answer · 2018-07-12 08:16:40Z

4

XML:

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string-array name="area_key">
    <item>北</item>
    <item>中</item>
    <item>南</item>
  </string-array>
  <integer-array name="area_value">
    <item>0</item>
    <item>1</item>
    <item>2</item>
  </integer-array>
</resources>

Java file:

String[] areaKey = getResources().getStringArray(R.array.area_key);
int[] areaValue = getResources().getIntArray(R.array.area_value);
HashMap<String, Integer> areas = new HashMap<String, Integer>();
for (int i = 0; i < areaKey.length; i++) {
  areas.put(areaKey[i], areaValue[i]);
}

answered Jul 12, 2018 at 8:16

Mike Yang

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Comments

Andrei Buneyeu · Accepted Answer · 2011-08-31 13:40:44Z

I had the same problem. The decision for me was to create many strings in xml-file (not string arrays) and to create String[] array in code. It looks like this:

    Builder builder = new AlertDialog.Builder(DMCBrowser.this);
    builder.setTitle(R.string.title_playlist);
    final CharSequence[] items = new CharSequence[] { getResources().getString(R.string.watch_all),
                        getResources().getString(R.string.select_items) };
    builder.setItems(items, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        if (items[which].equals(getResources().getString(R.string.watch_all))) {
                            Log.d(TAG, "Watch all");
                        } else if (items[which].equals(getResources().getString(R.string.select_items))) {
                            Log.d(TAG, "Select items");
                        }
                    }
                }).show();

Although it does not look much compact, we can differ one item from another not only by non-understandable identifier like 1 or 2, but by human-readable android R-id. If i would like to change item order, it will be very easy.

RobP · Accepted Answer · 2015-02-20 20:40:00Z

2

A great way to do this is to make an array of arrays with XML as shown below. Then the native functions make it pretty easy to get the array with the named index you want and get the string inside it.

<string-array name="one">
    <item>"Item 1"</item>
</string-array>

<string-array name="two">
    <item>"Item 2"</item>
</string-array>

<array name="my_list">
    <item>@array/one</item>
    <item>@array/two</item>
</array>

answered Feb 20, 2015 at 20:40

RobP

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Comments

HamidReza · Accepted Answer · 2018-03-02 22:55:49Z

you can use in java code:

 public static HashMap<Integer, String> getAll()
 {
            HashMap<Integer, String> items = new HashMap<Integer, String>();
            items.put(0, "item 1");
            items.put(1, "item 2");
            items.put(2, "item 3");
            return items;
 }

 public static Integer getKey(Map hm, String value) {
            for (Object o : hm.keySet()) {
                if (hm.get(o).equals(value)) {
                    return (Integer)o;
                }
            }
            return 0;
 }

and bind to spinner:

Spinner spn_items = (Spinner) view.findViewById(R.id.spn_items);
ArrayAdapter<Object> adapter = new ArrayAdapter<Object>(getActivity(),android.R.layout.simple_spinner_dropdown_item, getAll().values().toArray());    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spn_items.setAdapter(adapter);

Aseem Sharma · Accepted Answer · 2014-11-04 09:24:51Z

-1

You can make resource of your string array like below to show as hashmap kind :

<string-array name="list_websites">
        <item>
            <string name="title">Amazon</string>
            <string name="isChecked">0</string>
        </item>
        <item>
            <string name="title">eBay</string>
            <string name="isChecked">0</string>
        </item>
        <item>
            <string name="title">Sam\'s Club</string>
            <string name="isChecked">0</string>
        </item>
        <item>
            <string name="title">Wallmart</string>
            <string name="isChecked">0</string>
        </item>
        <item>
            <string name="title">Best Buy</string>
            <string name="isChecked">0</string>
        </item>
        <item>
            <string name="title">Rekuten</string>
            <string name="isChecked">0</string>
        </item>
</string-array>

Now above code can be parsed as ArrayList of HashMap kind.

answered Nov 4, 2014 at 9:24

Aseem Sharma

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2 Comments

orbitbot Over a year ago

Could you add a code example of how you parse this from the resources file? I get empty string arrays with the following using your example resource: String[] config = context.getResources().getStringArray(R.array.list_websites);

Nirav Dangi Over a year ago

Tag <string> can not appear inside <string-array>, only <item>

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