关闭自动更新时区后，仍会更新时区。默认时区不生效解决办法

通常关闭自动更新时区后设置默认的时区，联网时区是不会变化的

frameworks/base/packages/SettingsProvider/res/values/defaults.xml

将自动更新时区开关def_auto_time_zone的值设置为false即可

但是现在遇到关闭后时区还是会自动更新，首先我们得排除

系统支持的默认时区列表tzlookup.xml文件中

文件路径：system/timezone/output_data/android/tzlookup.xml

如果是tzlookup.xml中没有的时区id，配置默认时区是无效的，因为系统不支持。

同时客户需要在自动更新打开的情况下，不自动更新时区使用设置的默认时区

android 10.0如下修改

frameworks/opt/telephony/src/java/com/android/internal/telephony/NewNitzStateMachine.java文件的setAndBroadcastNetworkSetTimeZone方法开头添加如下代码，对应的类也需要导入：

import com.android.internal.telephony.uicc.IccCardApplicationStatus.AppState;

import com.android.internal.telephony.uicc.UiccCardApplication;

   private void setAndBroadcastNetworkSetTimeZone(String zoneId) {
        //add by chenzeqi
        UiccCardApplication uiccApp = mPhone.getUiccCardApplication();
        if (uiccApp == null || uiccApp.getState() == IccCardApplicationStatus.AppState.APPSTATE_UNKNOWN) {
            Rlog.d(LOG_TAG, "Not to set network time zone due to sim absent.");
            return;

      //end
        }

android 11.0如下修改

frameworks/opt/telephony/src/java/com/android/internal/telephony/nitz/TimeServiceHelperImpl.java文件的maybeSuggestDeviceTimeZone方法添加

import com.android.internal.telephony.GsmCdmaPhone;

import com.android.internal.telephony.uicc.IccCardApplicationStatus.AppState;

import com.android.internal.telephony.uicc.UiccCardApplication;

public void maybeSuggestDeviceTimeZone(@NonNull TelephonyTimeZoneSuggestion newSuggestion) {

Objects.requireNonNull(newSuggestion);

//add by chenzeqi

UiccCardApplication uiccApp = ((GsmCdmaPhone) mPhone).getUiccCardApplication();

if (uiccApp == null || uiccApp.getState() == AppState.APPSTATE_UNKNOWN) {

mTimeLog.log("Not to set network time zone due to sim absent.");

return;

//end

}