Android实践 -- 设置系统日期时间和时区

设置系统日期时间和时区

设置系统的日期时间和时区,需要 系统权限和系统签名android:sharedUserId="android.uid.system"
需要在manifest文件中添加相应的权限

  <uses-permission android:name="android.permission.WRITE_SETTINGS"/>
  <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS"/>
  • 判断系统使用的是24小时制还是12小时制

    boolean is24Hour =  DateFormat.is24HourFormat(mContext);
  • 设置系统的小时制

24小时制

  android.provider.Settings.System.putString(mContext.getContentResolver(),
                android.provider.Settings.System.TIME_12_24, "24");

12小时制

  android.provider.Settings.System.putString(mContext.getContentResolver(),
                android.provider.Settings.System.TIME_12_24, "12");
  • 判断系统的时区是否是自动获取的

    public boolean isTimeZoneAuto(){
      try {
          return  android.provider.Settings.Global.getInt(mContext.getContentResolver(),
                  android.provider.Settings.Global.AUTO_TIME_ZONE) > 0;
      } catch (SettingNotFoundException e) {
          e.printStackTrace();
          return false;
      }
    }
  • 设置系统的时区是否自动获取

    public void setAutoTimeZone(int checked){
      android.provider.Settings.Global.putInt(mContext.getContentResolver(),
              android.provider.Settings.Global.AUTO_TIME_ZONE, checked);
    }
  • 判断系统的时间是否自动获取的

    public boolean isDateTimeAuto(){
      try {
          return android.provider.Settings.Global.getInt(mContext.getContentResolver(),
                  android.provider.Settings.Global.AUTO_TIME) > 0;
      } catch (SettingNotFoundException e) {
          e.printStackTrace();
          return false;
      }
    }
  • 设置系统的时间是否需要自动获取

    public void setAutoDateTime(int checked){
      android.provider.Settings.Global.putInt(mContext.getContentResolver(),
              android.provider.Settings.Global.AUTO_TIME, checked);
    }
  • 设置系统日期

    参考系统Settings中的源码

    public void setSysDate(int year,int month,int day){
      Calendar c = Calendar.getInstance();
      c.set(Calendar.YEAR, year);
      c.set(Calendar.MONTH, month);
      c.set(Calendar.DAY_OF_MONTH, day);
    
      long when = c.getTimeInMillis();
    
      if(when / 1000 < Integer.MAX_VALUE){
          ((AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE)).setTime(when);
      }
    }
  • 设置系统时间

    参考系统Settings中的源码

    public void setSysTime(int hour,int minute){
      Calendar c = Calendar.getInstance();
      c.set(Calendar.HOUR_OF_DAY, hour);
      c.set(Calendar.MINUTE, minute);
      c.set(Calendar.SECOND, 0);
      c.set(Calendar.MILLISECOND, 0);
    
      long when = c.getTimeInMillis();
    
      if(when / 1000 < Integer.MAX_VALUE){
          ((AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE)).setTime(when);
      }
    }
  • 设置系统时区

    public void setTimeZone(String timeZone){
      final Calendar now = Calendar.getInstance();
      TimeZone tz = TimeZone.getTimeZone(timeZone);
      now.setTimeZone(tz);
    }
  • 获取系统当前的时区

    public String getDefaultTimeZone(){
      return TimeZone.getDefault().getDisplayName();
    }
原文地址:https://www.cnblogs.com/Free-Thinker/p/6627813.html