@Override
 public void notifyListeners(SignalCallback callback) {
 MobileIconGroup icons = getIcons();
 String contentDescription = getStringIfExists(getContentDescription());
 String dataContentDescription = getStringIfExists(icons.mDataContentDescription);
 if (mCurrentState.inetCondition == 0) {
  dataContentDescription = mContext.getString(R.string.data_connection_no_internet);
 }
 final boolean dataDisabled = mCurrentState.iconGroup == TelephonyIcons.DATA_DISABLED
  && mCurrentState.userSetup;
 /// M: Customize the signal strength icon id. @ {
 int iconId = getCurrentIconId();
 iconId = mStatusBarExt.getCustomizeSignalStrengthIcon(
   mSubscriptionInfo.getSubscriptionId(),
   iconId,
   mSignalStrength,
   mDataNetType,
   mServiceState);
 /// @ }
 if (mSignalStrength != null) {
  /*int dbm = mSignalStrength.getDbm();
  int asu = mSignalStrength.getAsuLevel();
  Log.i("ccz","dbm="+dbm + " asu="+asu);*/
  Log.e("ccz", "isGSM=="+mSignalStrength.isGsm() 
  + " connected=="+mCurrentState.connected+" dataConnected=="+mCurrentState.dataConnected);
 }
 if (mCurrentState.connected) {
  //cczheng add get signal icon [S]
  //通過 getSignalStrengthIcon 方法，根據自定義規則，返回要顯示對應資源id
  iconId = TelephonyIcons.getSignalStrengthIcon(mSignalStrength != null ? mSignalStrength.getDbm() : -120,
  mSignalStrength != null ? mSignalStrength.getAsuLevel() : 0);
  //iconId = TelephonyIcons.getSignalStrengthIcon(mCurrentState.level);
  //cczheng add get signal icon [E]
 }else{//未連接成功時顯示 X
  iconId = R.drawable.stat_sys_signal_disable;
 }
 // Show icon in QS when we are connected or data is disabled.
 boolean showDataIcon = mCurrentState.dataConnected || dataDisabled;
 Log.i("ccz","dataDisabled="+dataDisabled + " showDataIcon="+showDataIcon);
 IconState statusIcon = new IconState(mCurrentState.enabled && !mCurrentState.airplaneMode,
  iconId, contentDescription);
 int qsTypeIcon = 0;
 IconState qsIcon = null;
 String description = null;
 // Only send data sim callbacks to QS.
 if (mCurrentState.dataSim) {
  qsTypeIcon = (showDataIcon || mConfig.alwaysShowDataRatIcon) ? icons.mQsDataType : 0;
  qsIcon = new IconState(mCurrentState.enabled
   && !mCurrentState.isEmergency, getQsCurrentIconId(), contentDescription);
  description = mCurrentState.isEmergency ? null : mCurrentState.networkName;
 }
 boolean activityIn = mCurrentState.dataConnected
  && !mCurrentState.carrierNetworkChangeMode
  && mCurrentState.activityIn;
 boolean activityOut = mCurrentState.dataConnected
  && !mCurrentState.carrierNetworkChangeMode
  && mCurrentState.activityOut;
 showDataIcon &= mCurrentState.isDefault || dataDisabled;
 int typeIcon = (showDataIcon || mConfig.alwaysShowDataRatIcon) ? icons.mDataType : 0;
 /// M: Add for lwa.
 typeIcon = mCurrentState.lwaRegState == NetworkTypeUtils.LWA_STATE_CONNCTED
  && showDataIcon ? NetworkTypeUtils.LWA_ICON : typeIcon;
 /** M: Support [Network Type on StatusBar], change the implement methods.
  * Get the network icon base on service state.
  * Add one more parameter for network type.
  * @ { **/
 int networkIcon = mCurrentState.networkIcon;
 /// M: Support volte icon.Bug fix when airplane mode is on go to hide volte icon
 int volteIcon = mCurrentState.airplaneMode && !isImsOverWfc()
  ? 0 : mCurrentState.volteIcon;
 /// M: when data disabled, common show data icon as x, but op do not need show it @ {
 mStatusBarExt.isDataDisabled(mSubscriptionInfo.getSubscriptionId(), dataDisabled);
 /// @ }
 /// M: Customize the data type icon id. @ {
 typeIcon = mStatusBarExt.getDataTypeIcon(
   mSubscriptionInfo.getSubscriptionId(),
   typeIcon,
   mDataNetType,
   mCurrentState.dataConnected ? TelephonyManager.DATA_CONNECTED :
    TelephonyManager.DATA_DISCONNECTED,
   mServiceState);
 /// @ }
 /// M: Customize the network type icon id. @ {
 networkIcon = mStatusBarExt.getNetworkTypeIcon(
   mSubscriptionInfo.getSubscriptionId(),
   networkIcon,
   mDataNetType,
   mServiceState);
 /// for operator
 //通過 description 傳遞運營商信息
 description = mCurrentState.operator;
 // for qsdatetype
 qsTypeIcon = mCurrentState.mQsDataType;
 /// @ }
 //cczheng add for when datadisable set mMobileDataActivity GONE [S]
 //數據網絡關閉時，id 置為0，不顯示上下行小箭頭
 if (isDataDisabled()) {
  typeIcon = 0;
 }
 Log.d("ccz", "qsTypeIcon="+qsTypeIcon);
 //cczheng add for when datadisable set mMobileDataActivity GONE [E]
 Log.e("ccz", " showDataIcon="+showDataIcon+" activityIn="+activityIn
  +" activityOut="+activityOut);
 Log.i("ccz", "networkName="+mCurrentState.networkName + " description="+description);
 callback.setMobileDataIndicators(statusIcon, qsIcon, typeIcon, networkIcon, volteIcon,
  qsTypeIcon,activityIn, activityOut, dataContentDescription, description,
   icons.mIsWide, mSubscriptionInfo.getSubscriptionId(), mCurrentState.roaming,
   mCurrentState.isDefaultData, mCurrentState.customizedState);
 /// M: update plmn label @{
 mNetworkController.refreshPlmnCarrierLabel();
 /// @}
 }
 private final void updateTelephony() {
 .....
 /// M: For network type big icon.
 mCurrentState.networkIcon =
  NetworkTypeUtils.getNetworkTypeIcon(mServiceState, mConfig, hasService());
 /// M: For volte type icon.
 mCurrentState.volteIcon = getVolteIcon();
 //cczheng add for qsdatetype
 mCurrentState.mQsDataType = ((MobileIconGroup)mCurrentState.iconGroup).mQsDataType; 
 //cczheng add for operator
 mCurrentState.operator = getOperatorType();
 notifyListenersIfNecessary();
 }
 private String getOperatorType(){
 if (!hasService()) {
  // Not in service, don't show operator 
  return "0";
 }
 int operatorType = NetworkTypeUtils.getOperatorType(mPhone);
 if (operatorType == 0) 
  return "0";
 else
  return mContext.getResources().getString(operatorType); 
 }

 static final int[] TELEPHONY_SIGNAL_STRENGTH_FULL = {
  R.drawable.stat_sys_signal_0_fully,
  R.drawable.stat_sys_signal_1_fully,
  R.drawable.stat_sys_signal_2_fully,
  R.drawable.stat_sys_signal_3_fully,
  R.drawable.stat_sys_signal_4_fully,
 };
 /**
 * Customize Signal strength icon.
 * @param level telephony signal strength leve.
 * @return Signal strength icon id.
 */
 static final int getSignalStrengthIcon(int level) {
 android.util.Log.e("ccz", "getSignalStrengthIcon() level=="+level);
 if (level >= 0 && level < TELEPHONY_SIGNAL_STRENGTH_FULL.length) {
  return TELEPHONY_SIGNAL_STRENGTH_FULL[level];
 }
 return 0;
 }
 static final int getSignalStrengthIcon(int dbm, int asu) {
 int level = 0;
 if(dbm >= -107) level = 4;
 else if (dbm >= -111) level = 3; 
 else if (dbm >= -114) level = 2; 
 else if (dbm >= -117) level = 1; 
 android.util.Log.e("ccz", "getSignalStrengthIcon() dbm=="+dbm + " asu=="+asu + " level=="+level);
 return TELEPHONY_SIGNAL_STRENGTH_FULL[level];
 }

//cczheng add show small networkType
static final Map<Integer, Integer> sNetworkTypeSmallIcons = new HashMap<Integer, Integer>() {
 {
  // For CDMA 3G
  put(TelephonyManager.NETWORK_TYPE_EVDO_0, R.drawable.stat_sys_data_fully_connected_3g);
  put(TelephonyManager.NETWORK_TYPE_EVDO_A, R.drawable.stat_sys_data_fully_connected_3g);
  put(TelephonyManager.NETWORK_TYPE_EVDO_B, R.drawable.stat_sys_data_fully_connected_3g);
  put(TelephonyManager.NETWORK_TYPE_EHRPD, R.drawable.stat_sys_data_fully_connected_3g);
  // For CDMA 1x
  put(TelephonyManager.NETWORK_TYPE_CDMA, R.drawable.stat_sys_data_fully_connected_1x);
  put(TelephonyManager.NETWORK_TYPE_1xRTT, R.drawable.stat_sys_data_fully_connected_1x);
  // Edge
  put(TelephonyManager.NETWORK_TYPE_EDGE, R.drawable.stat_sys_data_fully_connected_e);
  // 3G
  put(TelephonyManager.NETWORK_TYPE_UMTS, R.drawable.stat_sys_data_fully_connected_3g);
  // For 4G
  put(TelephonyManager.NETWORK_TYPE_LTE, R.drawable.stat_sys_data_fully_connected_4g);
  // 3G
  put(TelephonyManager.NETWORK_TYPE_HSDPA, R.drawable.stat_sys_data_fully_connected_3g);
  put(TelephonyManager.NETWORK_TYPE_HSUPA, R.drawable.stat_sys_data_fully_connected_3g);
  put(TelephonyManager.NETWORK_TYPE_HSPA, R.drawable.stat_sys_data_fully_connected_3g);
  put(TelephonyManager.NETWORK_TYPE_HSPAP, R.drawable.stat_sys_data_fully_connected_3g);
  put(TelephonyManager.NETWORK_TYPE_IWLAN, 0);
 }
 };
public static int getNetworkTypeIcon(ServiceState serviceState, Config config,
  boolean hasService) {
 if (!hasService) {
  // Not in service, no network type.
  return 0;
 }
 int tempNetworkType = getNetworkType(serviceState);
 //cczheng change sNetworkTypeIcons to sNetworkTypeSmallIcons, show small networkType
 //Integer iconId = sNetworkTypeIcons.get(tempNetworkType);
 Integer iconId = sNetworkTypeSmallIcons.get(tempNetworkType);//add
 if (iconId == null) {
  iconId = tempNetworkType == TelephonyManager.NETWORK_TYPE_UNKNOWN ? 0 :
   config.showAtLeast3G ? R.drawable.stat_sys_network_type_3g :
      R.drawable.stat_sys_network_type_g;
 }
 Log.i("ccz", "Operator=="+ serviceState.getOperatorAlphaLong());
 return iconId.intValue();
 }
//cczheng add for operatortype
static final int[] OPERATOR_TYPE = {
 R.string.operator_cmcc,//CHINA_MOBILE
 R.string.operator_cucc,//CHINA_UNICOM
 R.string.operator_ctcc//CHINA_TELECOM
};
public static int getOperatorType(TelephonyManager telephonyManager) {
 int type = 0;
 String operator = telephonyManager.getSimOperator();
 switch (operator) {
 case "46000":
 case "46002":
 case "46007":
 case "41004": 
  type = OPERATOR_TYPE[0];
  break;
 case "46001":
 case "46006":
  type = OPERATOR_TYPE[1];
  break;
 case "46003":
 case "46011":
  type = OPERATOR_TYPE[2];
  break;
 default:
  break;
 }
 return type;
}

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\phone\StatusBarSignalPolicy.java
@Override
 public void setMobileDataIndicators(IconState statusIcon, IconState qsIcon, int statusType,
  int networkType, int volteIcon, int qsType, boolean activityIn, boolean activityOut,
  String typeContentDescription, String description, boolean isWide, int subId,
  boolean roaming, boolean isDefaultData, int customizedState) {
 Log.i("ccz","StatusBarSignalPolicy setMobileDataIndicators()");
 MobileIconState state = getState(subId);
 if (state == null) {
  return;
 }
 .....
 //cczheng add for operator because description is unless
 state.mOperator = description;
 Log.e("ccz","mMobileStrengthId="+statusIcon.icon);
 // Always send a copy to maintain value type semantics
 mIconController.setMobileIcons(mSlotMobile, MobileIconState.copyStates(mMobileStates));
}

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\StatusBarMobileView.java
public class StatusBarMobileView extends FrameLayout implements DarkReceiver,
 StatusIconDisplayable {
 private static final String TAG = "StatusBarMobileView";
 ....
 //cczheng add
 private ImageView mMobileDataActivity;
 private TextView mOperatorType;
 private void init() {
 ....
 mNetworkType = findViewById(R.id.network_type);
 mVolteType = findViewById(R.id.volte_indicator_ext);
 /// @}
 mMobileDataActivity = findViewById(R.id.data_inout);
 mOperatorType = findViewById(R.id.tv_operator);
 mMobileDrawable = new SignalDrawable(getContext());
 //cczheng annotaion don't use system full style
 //mMobile.setImageDrawable(mMobileDrawable);
 initDotView();
 mIsWfcEnable = SystemProperties.get("persist.vendor.mtk_wfc_support").equals("1");
 /// M: Add for Plugin feature @ {
 mStatusBarExt = OpSystemUICustomizationFactoryBase.getOpFactory(mContext)
     .makeSystemUIStatusBar(mContext);
 /// @ }
 }
 private void initViewState() {
 setContentDescription(mState.contentDescription);
 if (!mState.visible) {
  mMobileGroup.setVisibility(View.GONE);
 } else {
  mMobileGroup.setVisibility(View.VISIBLE);
 }
 //cczheng don't use system style change empty line style 注釋原來的實心信號格
 //mMobileDrawable.setLevel(mState.strengthId);
 mMobile.setImageResource(mState.strengthId);
 //show date in out icon 數據流量小箭頭
 mMobileDataActivity.setImageResource(getDataActivityIcon(mState.activityIn, mState.activityOut));
 if (mState.typeId > 0) {
  if (!mStatusBarExt.disableHostFunction()) {
  mMobileType.setContentDescription(mState.typeContentDescription);
  mMobileType.setImageResource(mState.typeId);
  }
  //cczheng hide small datatype icon x or 4G
  mMobileType.setVisibility(View.GONE /*View.VISIBLE*/);
 } else {
  mMobileType.setVisibility(View.GONE);
 }
 mMobileRoaming.setVisibility(mState.roaming ? View.VISIBLE : View.GONE);
 mIn.setVisibility(mState.activityIn ? View.VISIBLE : View.GONE);
 mOut.setVisibility(mState.activityIn ? View.VISIBLE : View.GONE);
 //mInoutContainer.setVisibility((mState.activityIn || mState.activityOut)
 // ? View.VISIBLE : View.GONE);
 mMobileDataActivity.setVisibility(mState.typeId != 0 ? View.VISIBLE : View.GONE);
 /// M: Add for [Network Type and volte on Statusbar] @{
 setCustomizeViewProperty();
 /// @}
 showWfcIfAirplaneMode();
 /// M: Add data group for plugin feature. @ {
 mStatusBarExt.addCustomizedView(mState.subId, mContext, mMobileGroup);
 setCustomizedOpViews();
 /// @ }
 }
 private void updateState(MobileIconState state) {
 setContentDescription(state.contentDescription);
 if (mState.visible != state.visible) {
  mMobileGroup.setVisibility(state.visible ? View.VISIBLE : View.GONE);
  // To avoid StatusBarMobileView will not show in extreme case,
  // force request layout once if visible state changed.
  requestLayout();
 }
 if (mState.strengthId != state.strengthId) {
  //cczheng don't use system style change empty line style
  //mMobileDrawable.setLevel(state.strengthId);
  mMobile.setImageResource(state.strengthId);
 }
 //show date in out icon 
 mMobileDataActivity.setImageResource(getDataActivityIcon(state.activityIn, state.activityOut));
 if (mState.typeId != state.typeId) {
  if (state.typeId != 0) {
  if (!mStatusBarExt.disableHostFunction()) {
   mMobileType.setContentDescription(state.typeContentDescription);
   mMobileType.setImageResource(state.typeId);
  }
  //cczheng hide small datatype icon x or 4G
  //數據流量標識 mMobileDataActivity 替代 mMobileType
  mMobileType.setVisibility(View.GONE /*View.VISIBLE*/);
  } else {
  mMobileType.setVisibility(View.GONE);
  }
 }
 mMobileRoaming.setVisibility(state.roaming ? View.VISIBLE : View.GONE);
 mIn.setVisibility(state.activityIn ? View.VISIBLE : View.GONE);
 mOut.setVisibility(state.activityIn ? View.VISIBLE : View.GONE);
 //mInoutContainer.setVisibility((state.activityIn || state.activityOut)
 // ? View.VISIBLE : View.GONE);
 mMobileDataActivity.setVisibility(state.typeId != 0 ? View.VISIBLE : View.GONE);
 /// M: Add for [Network Type and volte on Statusbar] @{
 if (mState.networkIcon != state.networkIcon) {
  setNetworkIcon(state.networkIcon);
 }
 if (mState.volteIcon != state.volteIcon) {
  setVolteIcon(state.volteIcon);
 }
 if (mState.mOperator != state.mOperator) {
  setOperatorText(state.mOperator);
 }
 if (mState.mCustomizedState != state.mCustomizedState
  || mState.networkIcon != state.networkIcon) {
  // if cs reg state has changed or network icon change to LTE,need to update.
  mStatusBarExt.setDisVolteView(mState.subId, state.volteIcon, mVolteType);
 }
 /// @}
 mState = state;
 // should added after set mState
 showWfcIfAirplaneMode();
 setCustomizedOpViews();
 }
 //cczheng add for data in out icon [S] 
 final int DATA_ACTIVITY_NONE = R.drawable.ct_stat_sys_signal_not_inout;
 final int DATA_ACTIVITY_IN = R.drawable.ct_stat_sys_signal_in;
 final int DATA_ACTIVITY_OUT = R.drawable.ct_stat_sys_signal_out;
 final int DATA_ACTIVITY_INOUT = R.drawable.ct_stat_sys_signal_inout;
 /**
 * M: getDataActivityIcon: Get DataActivity icon by dataActivity type.
 * @param activityIn : dataActivity Type
 * @param activityOut : dataActivity Type
 * @return dataActivity icon ID
 */
 public int getDataActivityIcon(boolean activityIn, boolean activityOut) {
 Log.i("ccz", "mActivityIn="+activityIn+" mActivityOut="+activityOut); 
 int icon = DATA_ACTIVITY_NONE;
 if (activityIn && activityOut) {
  icon = DATA_ACTIVITY_INOUT;
 }else if (activityIn) {
  icon = DATA_ACTIVITY_IN;
 }else if (activityOut) {
  icon = DATA_ACTIVITY_OUT;
 }
 return icon;
 }
 //cczheng add for data in out icon [S] 
 private void setOperatorText(String mOperator){
 if ("0".equals(mOperator)) {
  mOperatorType.setVisibility(View.GONE);
 } else {
  mOperatorType.setText(mOperator);
  mOperatorType.setVisibility(View.VISIBLE);
 }
 }

<com.android.systemui.statusbar.StatusBarMobileView
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:systemui="http://schemas.android.com/apk/res-auto"
 android:id="@+id/mobile_combo"
 android:layout_width="wrap_content"
 android:layout_height="match_parent"
 android:gravity="center_vertical" >
 <com.android.keyguard.AlphaOptimizedLinearLayout
 android:id="@+id/mobile_group"
 android:layout_width="wrap_content"
 android:layout_height="match_parent"
 android:gravity="center_vertical"
 android:orientation="horizontal" >
 <ImageView
  android:id="@+id/volte_indicator_ext"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_gravity="center_vertical"
  android:visibility="gone"
  />
 <!-- <ImageView
  android:id="@+id/network_type"
  android:layout_height="wrap_content"
  android:layout_width="wrap_content"
  android:layout_gravity="center_vertical"
  android:visibility="gone"
  /> -->
 <!-- cczheng annotaion network_type and add data in out view-->
 <FrameLayout
  android:layout_height="17dp"
  android:layout_width="wrap_content">
  <ImageView
  android:id="@+id/network_type"
  android:layout_height="wrap_content"
  android:layout_width="wrap_content"
  android:paddingEnd="2dp"
  android:visibility="gone"/>
  <ImageView
  android:id="@+id/data_inout"
  android:layout_height="wrap_content"
  android:layout_width="wrap_content"
  android:paddingEnd="2dp"
  android:visibility="gone"/>
 </FrameLayout> 
 <!-- end -->
 .......
 <ImageView
  android:id="@+id/mobile_roaming"
  android:layout_width="wrap_content"
  android:layout_height="17dp"
  android:paddingStart="1dp"
  android:paddingTop="1.5dp"
  android:paddingBottom="3dp"
  android:paddingEnd="1dp"
  android:scaleType="fitCenter"
  android:src="@drawable/stat_sys_roaming_ext"
  android:contentDescription="@string/data_connection_roaming"
  android:visibility="gone" />
 <!-- cczheng add for sim operator -->
 <TextView
  android:id="@+id/tv_operator"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:visibility="gone"/>
 </com.android.keyguard.AlphaOptimizedLinearLayout>
</com.android.systemui.statusbar.StatusBarMobileView>