1-) Android Yeni -  //spinner combobox kullanımı

//spinner combobox kullanımı

private Spinner sp_sec; //bunu yukarı tanımla

//spinner combobox kullanımı
sp_sec = (Spinner) findViewById(R.id.sp_sec);
list = new ArrayList<String>();
list.add("Item 1");
list.add("Item 2");
list.add("Item 3");
list.add("Item 4");
list.add("Item 5");
ArrayAdapter<String> adp1 = new ArrayAdapter<String>(this,
        android.R.layout.simple_list_item_1, list);
adp1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sp_sec.setAdapter(adp1);

sp_sec.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{

    @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1,int position, long id) {
        // TODO Auto-generated method stub
        //Toast.makeText(getBaseContext(),list.get(position), Toast.LENGTH_SHORT).show();
        // benim ekledigim
        switch (position) {

            case 0: Toast.makeText(getBaseContext(),"item 0 seçildi", Toast.LENGTH_SHORT).show();break;

            case 1:Toast.makeText(getBaseContext(),"item 1 seçildi", Toast.LENGTH_SHORT).show(); break;}

        if(list.get(position).equals("Item 3")){//isme göre karşılaştırır
            Toast.makeText(getBaseContext(),"item 3 seçildi", Toast.LENGTH_SHORT).show();
        }
        //benim ekledigim
    }

    @Override
    public void onNothingSelected(AdapterView<?> arg0) {
        // TODO Auto-generated method stub

    }

});
//