how to add a small triangle in spinner?

Question

I implemented my own custom Adapter spinner as you can see in the code. everything is working except that that the image is attached from the left side on each value instead attached only to the selected value. in the following image this is what i get:

and this is my code:

public class MyAdapter extends ArrayAdapter<String> {

    private Context context;
    private String[] values;

    public MyAdapter(Context ctx, int txtViewResourceId, String[] objects) {
        super(ctx, txtViewResourceId, objects);
        context = ctx;
        values = objects;
    }

    @Override
    public View getDropDownView(int position, View cnvtView, ViewGroup prnt) {
        return getCustomView(position, cnvtView, prnt);
    }
    @Override
    public View getView(int pos, View cnvtView, ViewGroup prnt) {
        return getCustomView(pos, cnvtView, prnt);
    }
    public View getCustomView(int position, View convertView,ViewGroup parent) {
        LayoutInflater inflater = LayoutInflater.from(context);
        View mySpinner = inflater.inflate(R.layout.custom_spinner, parent,
                false);
        TextView subSpinner = (TextView) mySpinner.findViewById(R.id.sub_text_seen);
        subSpinner.setText(values[position]);
        ImageView right_icon = (ImageView) mySpinner.findViewById(R.id.left_pic);


        return mySpinner;
    }
}

this is the initalize of the adapter:

spinnerduration.setAdapter(new MyAdapter(this, R.layout.custom_spinner, weeks_array));
    spinnerduration.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            /*TextView selectedText = (TextView) parent.getChildAt(0);
            if (selectedText != null) {
                selectedText.setTextColor(Color.WHITE);
            }*/
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {
            /*TextView selectedText = (TextView) parent.getChildAt(0);
            if (selectedText != null) {
                selectedText.setTextColor(Color.WHITE);
            }*/
        }
    });

what do you mean? instead using the image just set background for the spinner? — Matan Tubul, Nov 20 '15 at 10:57
should i delete the ImageView object? and set the background in the clickListener? — Matan Tubul, Nov 20 '15 at 11:01
You must use two different views for `getDropDownView` and for `getView` — Semyon Danilov, Nov 20 '15 at 11:37

Access Denied · Accepted Answer · 2015-11-20T11:04:19.387

1

You need to iterate visible items and if they are not selected you should erase image:

selectedItem.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);

if it's selected you need to set your triangle drawable:

selectedItem.setCompoundDrawablesWithIntrinsicBounds(R.drawable.icon, 0, 0, 0);

edited Nov 20 '15 at 11:04

answered Nov 20 '15 at 10:58

Access Denied

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where should i use it? in the onSelectedItemListener? – Matan Tubul Nov 20 '15 at 10:59
How do you use adapter? Probably, you set spinner adapter with an instance of your adapter class. There you can also set it's background. – Access Denied Nov 20 '15 at 11:02
yes exactly i create a new instance from MyAdapter. should i set the background after i set the adapter? – Matan Tubul Nov 20 '15 at 11:04
OK, I see what you mean and edited my answer. – Access Denied Nov 20 '15 at 11:04
can you look at my code? i edited him and still i dont understand how to use the "selectedItem" object. – Matan Tubul Nov 20 '15 at 11:10
take a look at the following sample: http://stackoverflow.com/a/7584311/1099716. Do you want to highlight selected item in spinner? – Access Denied Nov 20 '15 at 11:14

how to add a small triangle in spinner?

1 Answers1