Question

android中spinner如何实现省市二级联动

Answer 1

   Androidspinner实现省市二级联动，需要自定义adpter，将数据源绑定到adpter，当点击省时，触发自定义响应事件，改变市，示例如下:

public class MainActivity extends Activity { 
private TextView textView ; 
private Spinner province; 
private Spinner city; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        
        //String[] provinces = new String[]{"-省份-","河北省","山西省","北京"}; 
        textView = (TextView)this.findViewById(R.id.textView); 
        province = (Spinner)this.findViewById(R.id.province); 
        city = (Spinner)this.findViewById(R.id.city); 
        

        //(处理省的显示) 
        //将可选内容与ArrayAdapter的连接(从资源数组文件中获取数据) 
        ArrayAdapter<CharSequence> adapter = 
             ArrayAdapter.createFromResource(this, R.array.province, android.R.layout.simple_spinner_item); 
         //new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, provinces); 
        //设置下拉列表的风格 
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
        
        //将数据绑定到Spinner视图上 
        province.setAdapter(adapter); 
        
        //添加条目被选中监听器 
        province.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
            
   @Override 
   public void onItemSelected(AdapterView<?> parent, View view,int position, long id) { 
    //parent既是province对象 
    Spinner spinner = (Spinner)parent; 
    String pro =  (String)spinner.getItemAtPosition(position); 

    //(处理省的市的显示) 
    //将默认值与ArrayAdapter连接(从资源数组文件中获取数据) 
    ArrayAdapter<CharSequence> cityAdapter = ArrayAdapter.createFromResource 
                   (MainActivity.this, R.array.citydefault, android.R.layout.simple_spinner_item); 
     //new  ArrayAdapter<CharSequence> 
          //           (MainActivity.this,android.R.layout.simple_spinner_item, cities); 
    //获取所在省含有哪些市(从资源数组文件中获取数据) 
    if(pro.equals("河北省")){ 
     
     cityAdapter = ArrayAdapter.createFromResource 
                (MainActivity.this, R.array.hb, android.R.layout.simple_spinner_item); 
    }else if(pro.equals("北京市")){ 
     
     cityAdapter = ArrayAdapter.createFromResource 
                (MainActivity.this, R.array.bj, android.R.layout.simple_spinner_item); 
    }else if(pro.equals("山西省")){ 
     
     cityAdapter = ArrayAdapter.createFromResource 
                (MainActivity.this, R.array.shx, android.R.layout.simple_spinner_item); 
    } 
    //绑定数据到Spinner(City)上 
    city.setAdapter(cityAdapter); 
   } 

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

Answer 2

setOnItemSelectedListener
onItemSelected 看看选着哪个了 调用另外一个换数据