Android-TQC108 選擇手機型號

學習重點:
(1)Spinner的OnItemSelectedListener事件處理
(2)Spinner與setDropDownViewResource應用
(3)需要2個layout，1個layout放置spinner，另一個layout則顯示被setDropDownView自訂樣式選單
(4)其畫面如下

---

package COM.TQC.GDD01;

import android.app.Activity;
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;
import android.widget.TextView;

public class GDD01 extends Activity {
  private String[] types={"請選擇","HTC HERO","HTC MAGIC","HTC TATTOO",
      "NEXUS ONE","SONY X10","MOTO MILESTONE"};
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);  
    
    final TextView tv = (TextView)findViewById(R.id.text1);
    Spinner sp = (Spinner)findViewById(R.id.mySpinner);
       //建立一個ArrayAdapter物件，並放置下拉選單的內容
    ArrayAdapter adapter = new ArrayAdapter
    (GDD01.this,android.R.layout.simple_spinner_item,types);
       //設定下拉選單的樣式simple_spinner_dropdown_item
    adapter.setDropDownViewResource(R.layout.myspinner_layout);
    sp.setAdapter(adapter);
    
    sp.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){

  public void onItemSelected(AdapterView arg0, View arg1, int arg2,
    long arg3) {
   // TODO Auto-generated method stub
   if(!types[arg2].equals("請選擇"))
   {
    tv.setText(getString(R.string.str1)+types[arg2]);
   }else{
    tv.setText(getString(R.string.str1));
   }
  }

  public void onNothingSelected(AdapterView arg0) {
   // TODO Auto-generated method stub
   
  }
     
    });
  }
}