Develop Reference

Array resource: get name of each item in the array [duplicate]

I have string array that looks like this:
<string-array name="USA">
<item name="NY">001</item>
<item name="LA">002</item>
<item name="WA">003</item>
</string-array>
I can get those numbers by:
Resources res = getResources();
int arryid = res.getIdentifier("USA", "array", getPackageName());
String[] numbers = res.getStringArray(arryid);
But how can I also get the names (NY,LA,WA)?
Note that I have a lot of counties... Maybe use different approach?

In the documentation there is no name attribute for an <item>.
So I don't think there will be any way to get those keys.
However, if you want to get name of string or string-array, you can get it programmatically but not for the <item>.

As "001" is just the index, why not simply use that?
<string-array name="USA">
<item>NY</item>
<item>LA</item>
</string-array>
Then just use index + 1 for the position:
String[] usaStates = getResources().getStringArray(R.array.USA);
int index = 0;
String firstStateName = usaStates[index];
int firstStatePosition = (index + 1);
That aside, you can use two arrays and merge them into a HashMap:
<string-array name="USA">
<item>NY</item>
<item>LA</item>
</string-array>
<string-array name="USA_pos">
<item>001</item>
<item>002</item>
</string-array>
String[] usaStates = getResources().getStringArray(R.array.USA);
String[] usaStatePositions = getResources().getStringArray(R.array.USA_pos);
Map <String, String> map = new HashMap<>(usaStates.length);
for (int i = 0; i < usaStates.length; i++) {
map.put(usaStates[i], usaStatePositions[i]);
}

String[] numbers = getResources().getStringArray(R.array.USA);
to get data from array use.
numbers[id]
add array like this.
<string-array name="USA">
<item>NY</item>
<item>LA</item>
<item>WA</item>
</string-array>

Android : how to create Multidimensional Arrays in string.xml

let's say i have this Multidimensional Array :
myArray = new String[][]{{"Hello","World"},{"I Love","Android"},{"something","Random"}};
and in my app , i'm dealing with it like this :
for (int i=0; i<myArray.length; i++) {
for (int x=0; x<myArray[i].length; x++) {
// set textview or something
}
}
I want to do this Multidimensional Array by XML resource file.
i tried this way but did not work for me :
<string-array name="myArray">
<item><item>Hello</item><item>World</item></item>
<item><item>I Love</item><item>Android</item></item>
<item><item>something</item><item>Random</item></item>
</string-array>
I know I can do normal string-array in the XML file and make it look like Multidimensional Array by Java but I just want to know if it's possible to do it in XML directly

You can maintain your xml for array like this:
<resources>
<array name="categories_0">
<item>1</item>
<item>Pizza</item>
</array>
<array name="categories_1">
<item>2</item>
<item>Burger</item>
</array>
<array name="categories_2">
<item>3</item>
<item>Maggie</item>
</array>
Now each category is an array with a key/value pair for it’s properties. What ties it with other categories is the integer suffix. Now we can use this dandy static method to grab them:
Than, we can define global reference for index of the array:
public class ResourceHelper {
public static List<TypedArray> getMultiTypedArray(Context context, String key) {
List<TypedArray> array = new ArrayList<>();
try {
Class<R.array> res = R.array.class;
Field field;
int counter = 0;
do {
field = res.getField(key + "_" + counter);
array.add(context.getResources().obtainTypedArray(field.getInt(null)));
counter++;
} while (field != null);
} catch (Exception e) {
e.printStackTrace();
} finally {
return array;
}
}
}
This is dynamically retrieving the resources programmatically, with an incremented counter to find the next object until there isn’t one left. Now this can be consumed throughout your code base like this:
for (TypedArray item : ResourceHelper.getMultiTypedArray(this, "categories")) {
Category category = new Category();
category.ID = item.getInt(0, 0);
category.title = item.getString(1);
mCategories.add(category);
}
Here you may face error in encapsulating class or method. You can just add #SuppressWarnings("ResourceType") to that method or class.
This example will work for you.

It's impossible. You can put Json String inside
<item>{"dummy":"dummy"} </item> and then parse it.

Getting the value of an item in the array

I have the following items stored in an array-string in String.xml file
<string-array name="cr">
<item name="x"> 20</item>
<item name="y"> 40</item>
<item name="z"> 60</item>
<item name="k"> 80</item>
<item name="i"> 100</item>
<item name="l"> 120</item>
</string-array>
how can i get the value (eg 80) using the item name in mainactivity.java file?
int index =Arrays.asList(getResources().getStringArray(R.array.cr)).indexOf(..); I tried this but it doesn't work

You can use two array(one for key, one for value) and then put them into Hashmap object.
Example:
String[] mobileArray = getResources().getStringArray(R.array.mobile);
String[] priceArray = getResources().getStringArray(R.array.price);
Map<String, String> map = new HashMap<>();
for (int i = 0; i < mobileArray.length; i++) {
map.put(mobileArray[i], priceArray[i]);
}
strings.xml
<string-array name="mobile">
<item>Samsung</item>
<item>Lenevo</item>
<item>Karbon</item>
<item>Moto</item>
<item>Xperia</item>
<item>Micromax</item>
<item>Lava</item>
<item>Xiomi</item>
</string-array>
<string-array name="price">
<item>10000</item>
<item>12000</item>
<item>10000</item>
<item>12000</item>
<item>10000</item>
<item>12000</item>
<item>10000</item>
<item>12000</item>
</string-array>

I think you need something like this
String[] yourArray = getResources().getStringArray(R.array. cr);
String yourString = yourArray[3];
hope this is what you need

How to parse themed references from a resource array

For our current app, almost all of our resources are themed. For the most part this works, but I can't figure out how to parse themed resources out of a resource array.
The code we have for parsing color arrays looks something like this:
TypedArray ca = getResources().obtainTypedArray(id);
int[] colors = new int[ca.length()];
for (int i = 0; i < colors.length; i++)
{
colors[i] = ca.getColor(i, 0);
}
ca.recycle();
That works fine as long as the array looks something like this:
<array name="color_array_foo">
<item>#123456</item>
<item>#789ABC</item>
</array>
But if the array looks like this:
<array name="color_array_foo">
<item>?attr/color_nothing</item>
<item>?attr/color_1</item>
</array>
with the necessary stuff elsewhere in resources like:
<attr name="color_1" format="color"/>
...
<style name="Base" parent="#android:style/Theme.NoTitleBar">
<item name="color_1">#123456</item>
...
</style>
then it throws this exception:
java.lang.UnsupportedOperationException: Can't convert to color: type=0x2
at android.content.res.TypedArray.getColor(TypedArray.java:327)
I've looked around at the various methods of TypedArray, like peekValue() and getResourceId(), but I can't figure out anything that will let me dereference the themed attribute to the actual color value. How do I do that?
Edit: This smells like it's closer, but still isn't right:
TypedArray ca = getResources().obtainTypedArray(id);
int [] c = new int[ca.length()];
for (int i=0; i<c.length; i++)
{
if (ca.peekValue(i).type == TypedValue.TYPE_REFERENCE ||
ca.peekValue(i).type == TypedValue.TYPE_ATTRIBUTE)
{
// FIXME: Probably need to split the above if, and for
// TYPE_ATTRIBUTE, do some additional dereferencing?
c[i] = ca.getResources().getColor(ca.peekValue(i).data);
}
else
{
c[i] = ca.getColor(i, 0);
}
}
ca.recycle();

Use method public boolean resolveAttribute (int resid, TypedValue outValue, boolean resolveRefs)
TypedArray ca = getResources().obtainTypedArray(id);
int[] c = new int[ca.length()];
for (int i = 0; i < c.length; i++) {
if (ca.peekValue(i).type == TypedValue.TYPE_ATTRIBUTE) {
TypedValue typedValue = new TypedValue();
getTheme().resolveAttribute(ca.peekValue(i).data, typedValue, true);
c[i] = typedValue.data;
} else {
c[i] = ca.getColor(i, 0);
}
}
ca.recycle();
it works for
<resources>
<attr name="color_2" format="color"/>
<color name="color_2">#002</color>
<color name="color_3">#003</color>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="color_2">#color/color_2</item>
</style>
<array name="color_array_foo">
<item>#001</item>
<item>?attr/color_2</item>
<item>#color/color_3</item>
</array>
</resources>

Search value for key in string-array android

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

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.

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.

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.

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]);
}

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.

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>

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);

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.