設(shè)置系統(tǒng)日期時(shí)間和時(shí)區(qū)

設(shè)置系統(tǒng)的日期時(shí)間和時(shí)區(qū)俩滥，需要 系統(tǒng)權(quán)限和系統(tǒng)簽名，android:sharedUserId="android.uid.system"
需要在manifest文件中添加相應(yīng)的權(quán)限

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

• 判斷系統(tǒng)使用的是24小時(shí)制還是12小時(shí)制

  boolean is24Hour =  DateFormat.is24HourFormat(mContext);
  

• 設(shè)置系統(tǒng)的小時(shí)制

24小時(shí)制

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

12小時(shí)制

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

• 判斷系統(tǒng)的時(shí)區(qū)是否是自動(dòng)獲取的

  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;
    }
  }
  

• 設(shè)置系統(tǒng)的時(shí)區(qū)是否自動(dòng)獲取

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

• 判斷系統(tǒng)的時(shí)間是否自動(dòng)獲取的

  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;
    }
  }
  

• 設(shè)置系統(tǒng)的時(shí)間是否需要自動(dòng)獲取

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

• 設(shè)置系統(tǒng)日期

  參考系統(tǒng)Settings中的源碼

  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);
    }
  }
  

• 設(shè)置系統(tǒng)時(shí)間

  參考系統(tǒng)Settings中的源碼

  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);
    }
  }
  

• 設(shè)置系統(tǒng)時(shí)區(qū)

  public void setTimeZone(String timeZone){
    final Calendar now = Calendar.getInstance();
    TimeZone tz = TimeZone.getTimeZone(timeZone);
    now.setTimeZone(tz);
  }
  

• 獲取系統(tǒng)當(dāng)前的時(shí)區(qū)

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