Populate Spinner from string array source, with a String ArrayAdapter

Question

I have created my application by populating spinners within my Java code. I am now trying to convert it to populating my Spinners from my strings.xml file. I have followed a few websites( example 1 and example 2 ), but have not been able to get my code to work.

The main problem with those is that the ArrayAdapter's they use are of type <CharSequence>. Can I do this somehow using <String> ArrayAdapters?

This is my array in my XML file :

<string-array name="anti_pump_ap_mode_array">
    <item>OFF</item>
    <item>Anti-Pump</item>
    <item>Motor Cut...</item>
</string-array>

Here is the code I've tried :

apModeAdapter = new ArrayAdapter<String>(this, R.array.anti_pump_ap_mode_array, android.R.layout.simple_spinner_item );

apModeAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, R.array.anti_pump_ap_mode_array );

apModeAdapter = ArrayAdapter.createFromResource(this, android.R.layout.simple_spinner_item, R.array.anti_pump_ap_mode_array );

Of course the last one gives me an error, but the first two just do not populate my spinner. When I run the application the Spinner is just empty.

@Akshay Oh, wait there is no LogCat error. The first 2 ways of creating the ArrayAdapter create an empty spinner, while the third way just gives me an error and won't let me run the program. — JuiCe
– JuiCe, Commented Aug 24, 2012 at 12:55
haha then why won't it work??? I thought the same thing, but clearly theres some kind of difference that makes it not work. — JuiCe
– JuiCe, Commented Aug 24, 2012 at 15:19

nandeesh · Accepted Answer · 2012-08-24 12:55:32Z

19

Use below way, interchange array id and layout id. Textarray resource id is second parameter

apModeAdapter = ArrayAdapter.createFromResource(this, R.array.anti_pump_ap_mode_array, android.R.layout.simple_spinner_item,  );

Edit: For the first way to work. get the string array from resources

Resources res = getResources();
apModeAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, res.getStringArray(R.array.anti_pump_ap_mode_array) );

answered Aug 24, 2012 at 12:55

nandeesh

24.8k6 gold badges71 silver badges80 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

devunwired · Accepted Answer · 2012-08-24 12:56:52Z

2

CharSequence is an interface that String implements, so even though the API createFromResource() returns the interface type, it is still filled with your String array. If you truly needed to access the results as a String later, you could cast the accessor. However, most Android UI methods take CharSequence as input also.

In addition, the parameters are reversed. It should look like this:

ArrayAdapter.createFromResource(this, R.array.anti_pump_ap_mode_array, android.R.layout.simple_spinner_item );

answered Aug 24, 2012 at 12:56

devunwired

63.4k12 gold badges132 silver badges140 bronze badges

1 Comment

JuiCe Over a year ago

I was hoping this wasn't the answer. I would like to figure out a way to do it with a <String> adapter, as I have a LOT of Spinners already set up with those. I would need to cast a lot of things. Are you sure this is the only way?

Collectives™ on Stack Overflow

Populate Spinner from string array source, with a String ArrayAdapter

2 Answers 2

Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related