OnItemSelectedListenerImpl(下拉列表监听器)
1.获得一个下拉列表控件
Spinner spin=(Spinner)findById(R. id. xml文件中Spinner的id);
2.定义一个下拉列表内容适配器
ArrayAdapter<CharSequence> adapter= ArrayAdapter.createFromResource ();
// Adapter . setDropDownViewResource ();//设置列表风格
3.将适配器对象传入spin
spin.setAdapter(adapter);
// 读取下拉框选中内容 String text=下拉列表对象名.getSelectedItem().toString();
1 public void onCreate(Bundle savedInstanceState) { 2 super.onCreate(savedInstanceState); 3 setContentView(R.layout.main); 4 5 // 定义适配器,读取xml文件中省份的内容 6 ArrayAdapter<CharSequence> adapter =ArrayAdapter.createFromResource(this, R.array.pro,android.R.layout.simple_spinner_item); 7 //设置列表显示风格 8 adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 9 //第一个下拉框 10 final Spinner spin = (Spinner)super.findViewById(R.id.Spinner01); 11 spin.setAdapter(adapter); //将省份的适配器对象传入 12 spin.setPrompt("选择省份"); 13 14 // 定义适配器,读取xml文件中湖南省城市的内容 15 final ArrayAdapter<CharSequence> c1 = ArrayAdapter.createFromResource( 16 this, R.array.HuNancity, android.R.layout.simple_spinner_item); 17 // 定义适配器,读取xml文件中广东省城市的内容 18 final ArrayAdapter<CharSequence> c2 = ArrayAdapter.createFromResource( 19 this, R.array.guangdongcity, 20 android.R.layout.simple_spinner_item); 21 22 spin.setOnItemSelectedListener(new OnItemSelectedListener() { 23 public void onItemSelected(AdapterView<?> arg0, View view,int position, long id) { 24 final Spinner sp1 = (Spinner)findViewById(R.id.Spinner02); 25 // 读取【省份名称】的下拉框选中内容 26 final String itemPro =spin.getSelectedItem().toString(); 27 if (itemPro.equals("湖南省")) { 28 sp1.setAdapter(c1); 29 } else if (itemPro.equals("广东省")) { 30 sp1.setAdapter(c2); 31 } 32 } 33 34 public void onNothingSelected(AdapterView<?> arg0) {} 35 }); 36 }