1、RIL.java CdmaServiceStateTracker以及GsmServiceStateTracker，在系统启动时，会调用如下方式，该方法将Tracher中的Handler与RIL中的上报消息绑定在一起，即收到上报消息，就回调Handler中的某些方法。
@Override public void setOnNITZTime(Handler h, int what, Object obj) { super.setOnNITZTime(h, what, obj); // Send the last NITZ time if we have it if (mLastNITZTimeInfo != null) { mNITZTimeRegistrant .notifyRegistrant( new AsyncResult (null, mLastNITZTimeInfo, null)); } }2、CdmaServiceStateTracker.java 调用方式如下：
protected CdmaServiceStateTracker(CDMAPhone phone, CellInfo cellInfo) { super(phone, phone.mCi, cellInfo); mPhone = phone; mCr = phone.getContext().getContentResolver(); mCi.setOnNITZTime(this, EVENT_NITZ_TIME, null); ... ... }3、RIL.java RIL在收到上报消息RIL_UNSOL_NITZ_TIME_RECEIVED，后，会调用2中的Handler，发送EVENT_NITZ_TIME的消息。
case RIL_UNSOL_NITZ_TIME_RECEIVED: if (RILJ_LOGD) unsljLogRet(response, ret); // has bonus long containing milliseconds since boot that the NITZ // time was received long nitzReceiveTime = p.readLong(); Object[] result = new Object[2]; result[0] = ret; result[1] = Long.valueOf(nitzReceiveTime); boolean ignoreNitz = SystemProperties.getBoolean( TelephonyProperties.PROPERTY_IGNORE_NITZ, false); if (ignoreNitz) { if (RILJ_LOGD) riljLog("ignoring UNSOL_NITZ_TIME_RECEIVED"); } else { if (mNITZTimeRegistrant != null) { mNITZTimeRegistrant .notifyRegistrant(new AsyncResult (null, result, null)); } // in case NITZ time registrant isn't registered yet, or a new registrant // registers later mLastNITZTimeInfo = result; }4、CdmaServiceStateTracker.java
case EVENT_NITZ_TIME: ar = (AsyncResult) msg.obj; String nitzString = (String)((Object[])ar.result)[0]; long nitzReceiveTime = ((Long)((Object[])ar.result)[1]).longValue(); setTimeFromNITZString(nitzString, nitzReceiveTime); break;调用setTimeFromNITZString 去设置时间和时区（偏移值+国家码）。
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