样式部分xml

1 
     
      10 11     
      16 17     
      23 24     
      30 31 
     

arrays部分xml

1 
      2 
     
       3    
      
        4         
       
        -省份-
        5         
       
        北京市
        6         
       
        河北省
        7     
       8     
      
        9         
       
        -城市-
       10         
       
        承德市
       11         
       
        石家庄
       12         
       
        邯郸市
       13         
       
        邢台市
       14         
       
        廊坊市
       15     
      16     
      
       17         
       
        -城市-
       18         
       
        海淀区
       19         
       
        朝阳区
       20         
       
        崇文区
       21         
       
        昌平区
       22     
      23 
     

Activity 部分

1 package com.example.android_spinner; 2  3 import android.os.Bundle; 4 import android.app.Activity; 5 import android.view.Menu; 6 import android.view.View; 7 import android.widget.AdapterView; 8 import android.widget.ArrayAdapter; 9 import android.widget.Spinner;10 11 public class MainActivity extends Activity {12     // 声明组件13     private Spinner sr1;14     private Spinner sr2;15 16     @Override17     protected void onCreate(Bundle savedInstanceState) {18         super.onCreate(savedInstanceState);19         setContentView(R.layout.activity_main);20         // 获取组件21         sr1 = (Spinner) this.findViewById(R.id.spinner1);22         sr2 = (Spinner) this.findViewById(R.id.spinner2);23         // 添加String数组24         String[] province = getResources().getStringArray(R.array.province);25         ;26         // 将数组配置器链接上预置的文件27         // ArrayAdapter
     
       aa = new ArrayAdapter
      
       (this,28         // android.R.layout.simple_spinner_item,province);29 30         // 这样就可以直接获取xml中的数组了31         ArrayAdapter
       
         aa = ArrayAdapter.createFromResource(this,32                 R.array.province, android.R.layout.simple_spinner_item);33 34         // 设置下拉菜单的样式35         aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);36         // 将数据绑定到spinner上37         sr1.setAdapter(aa);38 39         // 添加监听事件40 41         sr1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {42 43             @Override44             public void onItemSelected(AdapterView
         arg0, View arg1,45                     int arg2, long arg3) {46                 // 得到事件中选中的值47                 Spinner s = (Spinner) arg0;48                 String pro = (String) s.getItemAtPosition(arg2);49                 ArrayAdapter
        
          cityAdapter = null;50                 // 获取所在省含有哪些市(从资源数组文件中获取数据)51                 if (pro.equals("河北省")) {52 53                     cityAdapter = ArrayAdapter.createFromResource(54                             MainActivity.this, R.array.hb,55                             android.R.layout.simple_spinner_item);56                 } else if (pro.equals("北京市")) {57 58                     cityAdapter = ArrayAdapter.createFromResource(59                             MainActivity.this, R.array.bj,60                             android.R.layout.simple_spinner_item);61                 } 62                 sr2.setAdapter(cityAdapter);63             }64 65             @Override66             public void onNothingSelected(AdapterView
          arg0) {67                 // TODO Auto-generated method stub68 69             }70 71         });72 73     }74 75     @Override76     public boolean onCreateOptionsMenu(Menu menu) {77         // Inflate the menu; this adds items to the action bar if it is present.78         getMenuInflater().inflate(R.menu.main, menu);79         return true;80     }81 82 }
        
       
      
     

实现效果：