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);
}
}