一、默认关闭自动更新时区
将自动更新时区开关 def_auto_time_zone 的值设置为 false。
文件路径：platform/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
二、自动更新时区打开，设置默认时区不生效问题
当你 persist.sys.timezone 配置了这个没用，那可能和设备驻留到紧急网络上，会根据网络上报的国家码进行匹配并更新时区
2.1 android10.0(Q) 解决办法
frameworks/opt/telephony/src/java/com/android/internal/telephony/NewNitzStateMachine.java
import java.io.FileDescriptor; import java.io.PrintWriter; +//add +import com.android.internal.telephony.uicc.IccCardApplicationStatus.AppState; +import com.android.internal.telephony.uicc.UiccCardApplication; +//end + /** * {@hide} */ @@ -394,6 +399,12 @@ public final class NewNitzStateMachine implements NitzStateMachine { if (DBG) { Rlog.d(LOG_TAG, "setAndBroadcastNetworkSetTimeZone: zoneId=" + zoneId); } + //add + UiccCardApplication uiccApp = mPhone.getUiccCardApplication(); + if (uiccApp == null || uiccApp.getState() == AppState.APPSTATE_UNKNOWN) { + Rlog.d(LOG_TAG, "Not to set network time zone due to sim absent"); + return; + }//end mTimeServiceHelper.setDeviceTimeZone(zoneId); if (DBG) { Rlog.d(LOG_TAG,
2.2 android11.0® 解决办法
frameworks/opt/telephony/src/java/com/android/internal/telephony/nitz/TimeServiceHelperImpl.java
+import com.android.internal.telephony.GsmCdmaPhone; +import com.android.internal.telephony.uicc.IccCardApplicationStatus.AppState; +import com.android.internal.telephony.uicc.UiccCardApplication; @@ -40,6 +43,7 @@ import java.util.Objects; public final class TimeServiceHelperImpl implements TimeServiceHelper { private final int mSlotIndex; + private Phone mPhone; private final TimeDetector mTimeDetector; private final TimeZoneDetector mTimeZoneDetector; @@ -56,6 +60,7 @@ public final class TimeServiceHelperImpl implements TimeServiceHelper { public TimeServiceHelperImpl(@NonNull Phone phone) { mSlotIndex = phone.getPhoneId(); + mPhone = phone; Context context = Objects.requireNonNull(phone.getContext()); mTimeDetector = Objects.requireNonNull(context.getSystemService(TimeDetector.class)); mTimeZoneDetector = @@ -79,6 +84,11 @@ public final class TimeServiceHelperImpl implements TimeServiceHelper { public void maybeSuggestDeviceTimeZone(@NonNull TelephonyTimeZoneSuggestion newSuggestion) { Objects.requireNonNull(newSuggestion); + 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; + } TelephonyTimeZoneSuggestion oldSuggestion = mLastSuggestedTimeZone; if (shouldSendNewTimeZoneSuggestion(oldSuggestion, newSuggestion)) { mTimeZoneLog.log("Suggesting time zone update: " + newSuggestion);
