android 點擊文本框彈出日期對話框

package sys.act;

import java.util.Calendar;
import java.util.Date;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.LinearLayout;

public class Test extends Activity {

 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  LinearLayout line = new LinearLayout(this);
  final EditText et = new EditText(this);
  final Calendar cd = Calendar.getInstance();
  Date date = new Date();
  cd.setTime(date);
  et.setOnClickListener(new OnClickListener(){
   public void onClick(View v) {
     new DatePickerDialog(Test.this, new OnDateSetListener(){
      public void onDateSet(DatePicker view, int year,
        int monthOfYear, int dayOfMonth) {
       et.setText(year+"-"+monthOfYear+"-"+dayOfMonth);
      }
      },
      cd.get(Calendar.YEAR),
      cd.get(Calendar.MONTH),
      cd.get(Calendar.DAY_OF_MONTH)).show();
   }
  });
  et.setOnFocusChangeListener(new OnFocusChangeListener(){
   public void onFocusChange(View v, boolean hasFocus) {
     new DatePickerDialog(Test.this, new OnDateSetListener(){
      public void onDateSet(DatePicker view, int year,
        int monthOfYear, int dayOfMonth) {
       et.setText(year+"-"+monthOfYear+"-"+dayOfMonth);
      }
      },
      cd.get(Calendar.YEAR),
      cd.get(Calendar.MONTH),
      cd.get(Calendar.DAY_OF_MONTH)).show();
   }
  });
  line.addView(et);
  this.setContentView(line);
 }
}