Android入门之DatePickerDialog（纯Java）

Android入门之DatePickerDialog（纯Java）

1. import java.util.Calendar;  
2. import java.util.TimeZone;  
3.   
4. import Android.app.Activity;  
5. import android.app.DatePickerDialog;  
6. import android.app.DatePickerDialog.OnDateSetListener;  
7. import android.os.Bundle;  
8. import android.view.View;  
9. import android.view.View.OnClickListener;  
10. import android.widget.Button;  
11. import android.widget.DatePicker;  
12. import android.widget.RelativeLayout;  
13. import android.widget.TextView;  
14.   
15. public class DatePickerDialogTest extends Activity {  
16.       
17.     private RelativeLayout mainView=null;  
18.     private TextView tv=null;  
19.     private Button button=null;  
20.     private DatePickerDialog dpd=null;  
21.       
22.     public void onCreate(Bundle savedInstanceState) {  
23.         super.onCreate(savedInstanceState);  
24.         mainView=new RelativeLayout(this);  
25.         tv=new TextView(this);  
26.         RelativeLayout.LayoutParams lp_tv=new RelativeLayout.LayoutParams(-2,-2);  
27.         lp_tv.addRule(RelativeLayout.CENTER_IN_PARENT);  
28.         tv.setLayoutParams(lp_tv);  
29.         tv.setText("请设置日期");  
30.         button=new Button(this);  
31.         RelativeLayout.LayoutParams lp_button=new RelativeLayout.LayoutParams(-2,-2);  
32.         lp_button.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);  
33.         lp_button.addRule(RelativeLayout.CENTER_HORIZONTAL);  
34.         button.setLayoutParams(lp_button);  
35.         button.setText("设置");  
36.         button.setOnClickListener(new OnClickListener(){  
37.             public void onClick(View v) {  
38.                 if(dpd==null){  
39.                     dpd_init();  
40.                 }  
41.                 dpd.show();  
42.             }  
43.         });  
44.         mainView.addView(tv);  
45.         mainView.addView(button);  
46.         setContentView(mainView);  
47.     }  
48.     /*dpd初始化*/  
49.     void dpd_init(){  
50.         OnDateSetListener otsl=new OnDateSetListener(){  
51.             public void onDateSet(DatePicker view, int year, int monthOfYear,int dayOfMonth) {  
52.                 tv.setText("您设置了日期："+year+"年"+(monthOfYear+1)+"月"+dayOfMonth+"日");  
53.                 dpd.dismiss();  
54.             }  
55.         };  
56.         Calendar calendar=Calendar.getInstance(TimeZone.getDefault());  
57.         int year=calendar.get(Calendar.YEAR);  
58.         int month=calendar.get(Calendar.MONTH);  
59.         int day=calendar.get(Calendar.DAY_OF_MONTH);  
60.         dpd=new DatePickerDialog(this,otsl,year,month,day);  
61.     }  
62. }