How to rotate android spinner dropdown window

Question

I am trying to achieve a vertical Spinner. I am able to rotate the spinner view using

 spinner.setRotation(-90);

But this rotates only spinner view but not the dropdown list. As shown in the below image. How to rotate dropdown window also?

After trying below answer I am getting into this problem

Answer 1

You will need to create a custom adapter for your spinner.

Next on your getView make sure you rotate the parent that get's passed to it.

An example adapter:

public class AdapterTest extends ArrayAdapter<String> {


    public AdapterTest(Context context, int resource, List<String> objects) {
        super(context, resource, objects);
    }

    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        return getView(position, convertView, parent);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View v = LayoutInflater.from(getContext()).inflate(R.layout.row_spinner, parent, false);
        if (parent.getRotation() == 0 && parent instanceof ListView) {
             parent.setRotation(-90);
        }
        return v;
    }
}

Result: