Android入门之TimePickerDialog（纯Java）

import java.util.Calendar;
import java.util.TimeZone;
import Android.app.Activity;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.*;
public class TimePickerDialogTest extends Activity {
private RelativeLayout mainView=null;
private TextView tv=null;
private Button button=null;
private TimePickerDialog tpd=null;
public void onCreate（Bundle savedInstanceState） {
super.onCreate（savedInstanceState）;
mainView=new RelativeLayout（this）;
tv=new TextView（this）;
RelativeLayout.LayoutParams lp_tv=new RelativeLayout.LayoutParams（-2,-2）;
lp_tv.addRule（RelativeLayout.CENTER_IN_PARENT）;
tv.setLayoutParams（lp_tv）;
tv.setText（"请设置时间"）;
button=new Button（this）;
RelativeLayout.LayoutParams lp_button=new RelativeLayout.LayoutParams（-2,-2）;
lp_button.addRule（RelativeLayout.ALIGN_PARENT_BOTTOM）;
lp_button.addRule（RelativeLayout.CENTER_HORIZONTAL）;
button.setLayoutParams（lp_button）;
button.setText（"设置"）;
button.setOnClickListener（new OnClickListener（）{
public void onClick（View v） {
if（tpd==null）{
tpd_init（）;
}
tpd.show（）;
}
}）;
mainView.addView（tv）;
mainView.addView（button）;
setContentView（mainView）;
}
/*tpd初始化*/
void tpd_init（）{
TimePickerDialog.OnTimeSetListener otsl=new TimePickerDialog.OnTimeSetListener（）{
public void onTimeSet（TimePicker view, int hourOfDay, int minute） {
tv.setText（"您设置了时间："+hourOfDay+"时"+minute+"分"）;
tpd.dismiss（）;
}
};
Calendar calendar=Calendar.getInstance（TimeZone.getDefault（））;
int hourOfDay=calendar.get（Calendar.HOUR_OF_DAY）;
int minute=calendar.get（Calendar.MINUTE）;
tpd=new TimePickerDialog（this,otsl,hourOfDay,minute,true）;
}
}