引用：

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。

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。

来看下的完整代码吧：

 

Java Code

复制内容到剪贴板

package itokit.com;

import android.app.Activity;
import android.os.Bundle;
import android.text.format.Time;
import android.widget.TextView;

public class ShowTime extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        TextView myTextView = (TextView)findViewById(R.id.myTextView);
        Time time = new Time("GMT+8");
        time.setToNow();
        int year = time.year;
        int month = time.month;
        int day = time.monthDay;
        int minute = time.minute;
        int hour = time.hour;
        int sec = time.second;
        myTextView.setText("当前时间为：" + year +
                            "年 " + month +
                            "月 " + day +
                            "日 " + hour +
                            "时 " + minute +
                            "分 " + sec +
                            "秒");
    }
}

 唯一不足是取出时间只有24小时模式.

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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)