Android 两级下拉列表实现

package com.android.spinner; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.ArrayAdapter; import android.widget.Spinner; public class Main extends Activity { private String[] province = new String[]{"直辖市","特别行政区","陕西省"}; private String[][] city = new String[][]{{"北京市","重庆市","天津市","上海市"},{"香港","澳门"}, {"西安","咸阳","宝鸡","渭南","延安","榆林","商洛","汉中","安康","铜川"}}; private Spinner sp_father; private Spinner sp_child; private Context context; private ArrayAdapter<String> adapter_one; private ArrayAdapter<String> adapter_two; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); context =this; adapter_one = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,province); adapter_one.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); sp_father=(Spinner)findViewById(R.id.province); sp_father.setAdapter(adapter_one); sp_father.setOnItemSelectedListener(selectedListener); sp_child = (Spinner)findViewById(R.id.city); sp_child.setAdapter(adapter_two); } private OnItemSelectedListener selectedListener= new OnItemSelectedListener(){ @Override public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { int pos = sp_father.getSelectedItemPosition(); adapter_two = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_item, city[pos]); adapter_two.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); sp_child.setAdapter(adapter_two); } @Override public void onNothingSelected(AdapterView<?> arg0) { } }; }