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1 import android.app.Activity; 2 import android.os.Bundle; 3 import android.view.View; 4 import android.widget.AdapterView; 5 import android.widget.ArrayAdapter; 6 import android.widget.Spinner; 7 import android.widget.TextView; 8  9 public class Activity01 extends Activity10 {11     private static final String[]    m_Countries    = { "O型", "A型", "B型", "AB型", "其他" };12 13     private TextView                m_TextView;14     private Spinner                    m_Spinner;15     private ArrayAdapter
     
          adapter;16 17 18     /** Called when the activity is first created. */19     @Override20     public void onCreate(Bundle savedInstanceState)21     {22         super.onCreate(savedInstanceState);23         setContentView(R.layout.main);24 25         m_TextView = (TextView) findViewById(R.id.TextView1);26         m_Spinner = (Spinner) findViewById(R.id.Spinner1);27 28         //将可选内容与ArrayAdapter连接29         adapter = new ArrayAdapter
      
       (this, android.R.layout.simple_spinner_item, m_Countries);30 31         //设置下拉列表的风格32         adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);33         34         //将adapter添加到m_Spinner中35         m_Spinner.setAdapter(adapter);36 37         //添加Spinner事件监听38         m_Spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {39 40             @Override41             public void onItemSelected(AdapterView
        arg0, View arg1, int arg2, long arg3)42             {43                 m_TextView.setText("你的血型是：" + m_Countries[arg2]);44                 //设置显示当前选择的项45                 arg0.setVisibility(View.VISIBLE);46             }47 48             @Override49             public void onNothingSelected(AdapterView
        arg0)50             {51                 // TODO Auto-generated method stub52             }53 54         });55     }56 }