Spinner中未选择索引0

Question

我有Spinner我在其中填充国家/地区。我将澳大利亚设置在微调器的第0位。当我第一次选择它时，它显示为已选中，但实际上它未被选中。但是当我从列表中选择任何其他项目然后选择澳大利亚时，它将被选中。

任何人都可以帮我解释为什么第一次没有选择0索引？

代码

final MySpinnerAdapter adapter_country = new MySpinnerAdapter(SignUp.this, android.R.layout.simple_spinner_item, countryname);
adapter_country.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

spinner_country.setPrompt("Select Country");
spinner_country.setAdapter(adapter_country);

Collections.sort(countryname);
countryname.add(0, "Australia");
countryname.add(0, "Country");
countryname.remove(15);

spinner_country.setOnTouchListener(new OnTouchListener() {      
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch(event.getAction()) {
            case MotionEvent.ACTION_UP:
                if (spinner_check == 1) {
                    if (spinner_remove_check == 1) {
                    } else {
                        adapter_country.notifyDataSetChanged();
                        countryname.remove(0);
                    }
                    adapter_country.notifyDataSetChanged();
                    spinner_country.performClick();
                    spinner_remove_check=1;
                }
            break;
        }
        return true;
    }
}); 

spinner_country.setOnItemSelectedListener(new OnItemSelectedListener() {            
    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
        country_pos = position;
        String data = countryname.get(position) ;

        if (data.equals("Country")) {
            country_check = false;
            // countryname.remove(0);
            spinner_check = 1;
            ((TextView) parent.getChildAt(0)).setTextColor(Color.rgb(148, 150, 148));
            Get_gender();
        } else {
            HashMap<String, String> selectedData = new HashMap<String, String>();
            selectedData = countrylist.get(position);
            String selectedcountry_id =selectedData.get(TAG_ID);
            countryid=Integer.parseInt(selectedcountry_id);
            country_check=true;
        }
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {
    }
});

countryname是ArrayList。我也在做adapter_country.notifyDataSetChanged();但遇到同样的问题。