CODEWITHSUNDEEP
androidlistspinnerandroid-spinner
Vishal Bhatt
Vishal Bhatt

Reputation: 123

How do I bind a property of custom class List to Spinner in Android?

I'm retrieving a list of custom objects from mobile service client hosted in Azure Cloud, now I want to bind one of the property of this class to the Spinner control in Android client.

As my code below, I have a List<Departement> coming from Azure mobile services, and I want to bind DepartmentName to this Spinner in Android client.

public class Department
{
    public int ID;
    public String DepartmentName;
}

Any suggestion is highly appreciated

Upvotes: 2

Views: 3083

Answers (1)

Gomino
Gomino

Reputation: 12347

You can either:

  1. Override toString() method in your custom object to return the good value based on your custom property

    public class Department
{
    public int ID;
    public String DepartmentName;

    @Override
    public String toString() {
       return DepartmentName;
    } 
}

    And then in your view

    public void populateSpinner(Context context, List<Department> departments, Spinner spinner)
{
    ArrayAdapter<Department> adapter = new ArrayAdapter<Department>(context, android.R.layout.simple_spinner_item, departments);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);
}

  2. Create a temporary List<String> for your spinner adapter

    public void populateSpinner(Context context, List<Department> departments, Spinner spinner)
{
    List<String> list = new ArrayList<String>();
    for(Department dep : departments) {
        list.add(dep.DepartmentName);
    }

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_item, list);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);
}

  3. Last but not least, use your own adapter based on BaseAdapter instead of using the generic ArrayAdapter, that will own the list of custom objects and provide your spinner with the view.

Upvotes: 7

Related Questions