获取年月日时间

Android的文件有建议用Time代替Calendar。用Time对CPU的负荷会较小。在写Widget时特别重要。

Time t=new Time(); // or Time t=new Time("GMT+8"); 加上Time Zone资料。

[java] view plaincopy

1. package itokit.com;
2. import android.app.Activity;
3. import android.os.Bundle;
4. import android.text.format.Time;
5. import android.widget.TextView;
6. public class ShowTime extends Activity {
7. /** Called when the activity is first created. */
8. @Override
9. public void onCreate(Bundle savedInstanceState) {
10. super.onCreate(savedInstanceState);
11. setContentView(R.layout.main);
12. TextView myTextView = (TextView)findViewById(R.id.myTextView);
13. Time time = new Time("GMT+8");
14. time.setToNow();
15. int year = time.year;
16. int month = time.month;
17. int day = time.monthDay;
18. int minute = time.minute;
19. int hour = time.hour;
20. int sec = time.second;
21. myTextView.setText("当前时间为：" + year +
22. "年 " + month +
23. "月 " + day +
24. "日 " + hour +
25. "时 " + minute +
26. "分 " + sec +
27. "秒");
28. }
29. }

唯一不足是取出时间只有24小时模式.

long time=System.currentTimeMillis();
 final Calendar mCalendar=Calendar.getInstance();
 mCalendar.setTimeInMillis(time);
 取得小时：mHour=mCalendar.get(Calendar.HOUR);
 取得分钟：mMinuts=mCalendar.get(Calendar.MINUTE);

 如何获取Android系统时间是24小时制还是12小时制 
        ContentResolver cv = this.getContentResolver();
        String strTimeFormat = android.provider.Settings.System.getString(cv,
                                           android.provider.Settings.System.TIME_12_24);
       
        if(strTimeFormat.equals("24"))

{
               Log.i("activity","24");
        }

Calendar c = Calendar.getInstance();
取得系统日期:year = c.get(Calendar.YEAR)
               month = c.grt(Calendar.MONTH)
               day = c.get(Calendar.DAY_OF_MONTH)
取得系统时间：hour = c.get(Calendar.HOUR_OF_DAY);
                  minute = c.get(Calendar.MINUTE)

利用Calendar获取
 Calendar c = Calendar.getInstance();
取得系统日期:year = c.get(Calendar.YEAR)
               month = c.grt(Calendar.MONTH)
               day = c.get(Calendar.DAY_OF_MONTH)
取得系统时间：hour = c.get(Calendar.HOUR_OF_DAY);
                  minute = c.get(Calendar.MINUTE)
                    Calendar c = Calendar.getInstance();
取得系统日期:year = c.get(Calendar.YEAR)
                   month = c.grt(Calendar.MONTH)
                   day = c.get(Calendar.DAY_OF_MONTH)
取得系统时间：hour = c.get(Calendar.HOUR_OF_DAY);
                     minute = c.get(Calendar.MINUTE)