Niko Gamulin Niko Gamulin - 1 year ago 132
Android Question

Android: How to bind spinner to custom object list?

In the user interface there has to be a spinner which contains some names (the names are visible) and each name has its own ID (the IDs are not equal to display sequence). When the user selects the name from the list the variable currentID has to be changed.

The application contains the ArrayList

Where User is an object with ID and name:

public class User{
public int ID;
public String name;

What I don't know is how to create a spinner which displays the list of user's names and bind spinner items to IDs so when the spinner item is selected/changed the variable currentID is set to appropriate value.

I would appreciate if anyone could show the solution of the described problem or provide any link useful to solve the problem.


Answer Source

You can look at this answer. You can also go with a custom adapter, but the solution below is fine for simple cases.

Here's a re-post:

So if you came here because you want to have both labels and values in the Spinner - here's how I did it:

  1. Just create your Spinner the usual way
  2. Define 2 equal size arrays in your array.xml file -- one array for labels, one array for values
  3. Set your Spinner with android:entries="@array/labels"
  4. When you need a value, do something like this (no, you don't have to chain it):

      String selectedVal = getResources().getStringArray(R.array.values)[spinner.getSelectedItemPosition()];