Android实践 -- 设置系统日期时间和时区

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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();}

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