About the spinner's height in Android

How c开发者_JS百科an I set the height of the spinner? I mean the dropdown items's height.

For I found in SDK12 my spinner will show a long long item list to show the dropdown items. But it shows to long , how can i set the height?

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You can call setDropDownViewResource method and pass corresponding layout, on ArrayAdapter.

In this example im setting simple_spinner_dropdown_item resource which is higher than regular and has a radiobutton. I think you can pass your custom layout to.

adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

And in case you are making custom layout, you'll have to declare TextView as root element in order to adapter fill it with text.

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Maybe it could help..

ArrayAdapter yourSpinnerAdapter = new ArrayAdapter(this, R.layout.spinner_item, yourItem) {

        @Override
        public View getDropDownView(int position, View convertView,
                ViewGroup parent) {
            convertView = super.getDropDownView(position, convertView,
                    parent);

            convertView.setVisibility(View.VISIBLE);
            ViewGroup.LayoutParams p = convertView.getLayoutParams();
            p.height = 100; // set the height
            convertView.setLayoutParams(p);

            return convertView;
        }
    };