Android实践 -- 设置系统日期时间和时区

时间:2022-09-13 16:48:26

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(); }