Develop Reference

Set constant choices in Android Spinner from layout.xml

I have a spinner in my layout that I would like to populate with pre-determined, hard-coded data.
Of course I can dynamically add the data from my Activity class, but I want to know if there is a way to do this in the xml itself.
All of the choices that I want to appear in the spinner are present in arrays.xml. Is there a way to plug in this data into the Spinner?

plug this into your spinner assuming that you have properly created you xml array...
android:drawSelectorOnTop="true"
android:entries="#array/array_name"
Your String Resources you should add the array like so...
<string-array name="array_name">
<item>Array Item One</item>
<item>Array Item Two</item>
<item>Array Item Three</item>
</string-array>

This worked for me with a string-array named “count” loaded from the projects resources:
Spinner spinnerCount = (Spinner)findViewById(R.id.spinner_counts);
ArrayAdapter<String> spinnerCountArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, getResources().getStringArray(R.array.count));
spinnerCount.setAdapter(spinnerCountArrayAdapter);
let me know if it will fulfill your requirements.
This is my resource file (res/values/arrays.xml) with the string array:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name=“count”>
<item>0</item>
<item>5</item>
<item>10</item>
<item>100</item>
<item>1000</item>
<item>10000</item>
</string-array>
</resources>

Android Set xml value with string

I have this following spinner in my main activity
My problem is that the spinner's value is required when submitting but i want its default value to be empty so i put in my arrays.xml an item with empty value. so when the app is lunched it will show a empty spinner.
The problem is that when they click the spinner and the drop down display the first selection is empty.
my solution is to put the first data as "Select" but is there a way that the value would be empty like in html select tag?
<option value="">Select</option>
<option value="data 1">data 1</option>
on android xml is this possible? or how to do it? i tried this but still not working. it passes the value "Select"
<item value="">Select</item>
<item value="data 1">data 1</item>
my spinner
<Spinner
android:id="#+id/spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:entries="#array/spinner_arr"
android:tag="relation" />
my arrays.xml
<string-array name="spinner_arr">
<item></item>
<item>data 1</item>
<item>data 2</item>
<item>data 3</item>
<item>data 4</item>
<item>data 5</item>
</string-array>

Try using the prompt attr of Spinner, if that's not work you'll have to craete some adapter of your own.
take a look here:
How to make an Android Spinner with initial text "Select One"

get array from R.array

i want to get array from myapp.R.array.*.
means if i have this array.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name ="processName">
<item >solve</item>
<item >simplify</item>
<item >plot</item>
<item ></item>
</string-array>
</resources>
then i must have in variable : ["solve","simplify","plot","",]

Taking from #Raghunandan's comment, you can use the getStringArray() method.
http://developer.android.com/guide/topics/resources/string-resource.html
String[] processNames = getResources().getStringArray(R.array.processName);
You can then traverse the array as normal, or put it into an adapter if you are trying to display the options in a spinner or list view.
Be sure to note that you need a context in order to use this method. So, if you are not inside of an Activity, you'll need to use a passed reference to a context.
String[] processNames = context.getResources().getStringArray(R.array.processName);

Android Spinner Option Value Just like Select Tag

Is it Possible I can create a spinner with options and values.
<select name=test>
<option value="1">Baran</option>
<option value="2">Khan</option>
</select>
with the spinner XML:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="test">
<item Value="1">Baran</item>
<item value="2">Khan</item>
</string-array>
</resources>
How can I accomplish such target. As I need to pass Ids to the Server.

You have to manage two list and both are dynamic as you want.
Step to achieve :
Create two ArrayList<String>.Depend on your data type here i make as String Array.
Add value to ArrayList.
Create custom adapter and pass two list adapter in that and get value according that.
Add list to Spinner Adapter. Get the index or position of
the Spinner.
Follow same index to get value from second list value.
Send that value to server.
Task over
See Demo Example that will Guide you to make easy.
Enjoy !!!

Not the best but one approach would be to create another string array with the ids:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="test">
<item Value="1">Baran</item>
<item value="2">Khan</item>
</string-array>
<string-array name="testIDS">
<item>1</item>
<item>2</item>
</string-array>
</resources>
Now when item i is selected from array test you can get the id from item i in array testIDS.

Is it possible to refer to Array Resource Items directly in XML?

In code, it's easy to use the Resources class to get an instance of an XML typed array resource and traverse its items. My question: is it possible to reference array resource items in XML itself as shown below
<resource>
<array name="items">
<item>Item One</item>
<item>Item Two</item>
<item>Item Three</item>
</array>
<string name="itemThree">#array/items[2]</string>
</resource>
The format shown above does not work. Does anyone know if that is possible using a different format?

No, but I think the reverse works. Define your strings as string resources and refer to them as #string/... in the <item> elements.

I would just define itemThree in Java:
String itemThree = getResources().getStringArray(R.array.items)[2]
Ultimately, the XML gets inflated into Java objects, so it's not much difference IMO.