Android实践 -- 设置系统日期时间和时区

转自：https://www.cnblogs.com/Free-Thinker/p/6627813.html

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

1. <uses-permission android:name="android.permission.WRITE_SETTINGS"/>
2. <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

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

12小时制

1. android.provider.Settings.System.putString(mContext.getContentResolver(),
2. android.provider.Settings.System.TIME_12_24, "12");

• 判断系统的时区是否是自动获取的

  1. public boolean isTimeZoneAuto(){
  2. try {
  3. return android.provider.Settings.Global.getInt(mContext.getContentResolver(),
  4. android.provider.Settings.Global.AUTO_TIME_ZONE) > 0;
  5. } catch (SettingNotFoundException e) {
  6. e.printStackTrace();
  7. return false;
  8. }
  9. }

• 设置系统的时区是否自动获取

  1. public void setAutoTimeZone(int checked){
  2. android.provider.Settings.Global.putInt(mContext.getContentResolver(),
  3. android.provider.Settings.Global.AUTO_TIME_ZONE, checked);
  4. }

• 判断系统的时间是否自动获取的

  1. public boolean isDateTimeAuto(){
  2. try {
  3. return android.provider.Settings.Global.getInt(mContext.getContentResolver(),
  4. android.provider.Settings.Global.AUTO_TIME) > 0;
  5. } catch (SettingNotFoundException e) {
  6. e.printStackTrace();
  7. return false;
  8. }
  9. }

• 设置系统的时间是否需要自动获取

  1. public void setAutoDateTime(int checked){
  2. android.provider.Settings.Global.putInt(mContext.getContentResolver(),
  3. android.provider.Settings.Global.AUTO_TIME, checked);
  4. }

• 设置系统日期

  参考系统Settings中的源码

  1. public void setSysDate(int year,int month,int day){
  2. Calendar c = Calendar.getInstance();
  3. c.set(Calendar.YEAR, year);
  4. c.set(Calendar.MONTH, month);
  5. c.set(Calendar.DAY_OF_MONTH, day);
  6. long when = c.getTimeInMillis();
  7. if(when / 1000 < Integer.MAX_VALUE){
  8. ((AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE)).setTime(when);
  9. }
  10. }

• 设置系统时间

  参考系统Settings中的源码

  1. public void setSysTime(int hour,int minute){
  2. Calendar c = Calendar.getInstance();
  3. c.set(Calendar.HOUR_OF_DAY, hour);
  4. c.set(Calendar.MINUTE, minute);
  5. c.set(Calendar.SECOND, 0);
  6. c.set(Calendar.MILLISECOND, 0);
  7. long when = c.getTimeInMillis();
  8. if(when / 1000 < Integer.MAX_VALUE){
  9. ((AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE)).setTime(when);
  10. }
  11. }

• 设置系统时区

  1. public void setTimeZone(String timeZone){
  2. final Calendar now = Calendar.getInstance();
  3. TimeZone tz = TimeZone.getTimeZone(timeZone);
  4. now.setTimeZone(tz);
  5. }

• 获取系统当前的时区

  1. public String getDefaultTimeZone(){
  2. return TimeZone.getDefault().getDisplayName();