android 如何获取当前时间

最新推荐文章于 2022-06-22 10:20:42 发布

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最新推荐文章于 2022-06-22 10:20:42 发布

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本文介绍在Android开发中如何使用Time类来获取当前的确切时间，并提供了实现24小时制时间显示的方法，同时还给出了通过Calendar类获取时间的示例。

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Android 下如何获取当前确切时间呢？
我们建议Android的开发中用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");
括弧内加上Time Zone资料。

01
package itokit.com;  

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03
import android.app.Activity;  

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import android.os.Bundle;  

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import android.text.format.Time;  

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import android.widget.TextView;  

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public class ShowTime extends Activity
 {  

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    /**
 Called when the activity is first created. */ 

10
    @Override 

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    public void onCreate(Bundle
 savedInstanceState) {  

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        super.onCreate(savedInstanceState);  

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        setContentView(R.layout.main);  

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        TextView
 myTextView = (TextView)findViewById(R.id.myTextView);  

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        Time
 time = new Time("GMT+8");   

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        time.setToNow();  

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        int year
 = time.year;  

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        int month
 = time.month;  

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        int day
 = time.monthDay;  

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        int minute
 = time.minute;  

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        int hour
 = time.hour;  

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        int sec
 = time.second;  

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        myTextView.setText("当前时间为：" +
 year +   

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                            "年
 " +
 month +   

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                            "月
 " +
 day +   

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                            "日
 " +
 hour +   

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                            "时
 " +
 minute +   

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                            "分
 " +
 sec +   

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                            "秒");  

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    }  

32
}

不足的是只有24小时模式。

下面是其他获取时间的途径：

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)