SIM卡 --- IccCardProxy

Posted 2022-12-10 Achillisjack

6.2 IccCardProxy

在phone进程初始化过程中, PhoneProxy的构造方法中会构造IccCardProxy对象,

mIccCardProxy = new IccCardProxy(mContext, mCommandsInterface, mActivePhone.getPhoneId());

IccCardProxy的构造方法注册SIM卡状态变化的代码如下,

mUiccController.registerForIccChanged(this, EVENT_ICC_CHANGED, null);

UiccController的registerForIccChanged方法如下,

synchronized (mLock) 
   Registrant r = new Registrant (h, what, obj);
   mIccChangedRegistrants.add(r);
    //Notify registrant right after registering, so that it will get the latest ICC status,
    //otherwise which may not happen until there is an actual change in ICC status.
   r.notifyRegistrant();

现在的问题是关键是什么时候调用?在UiccController的获取SIM卡状态完成之后,也就是onGetIccCardStatusDone方法中,

mIccChangedRegistrants.notifyRegistrants(new AsyncResult(null, index, null));

IccCardProxy的handleMessage方法对EVENT_ICC_CHANGED消息处理如下,

case EVENT_ICC_CHANGED:
    if (mInitialized) 
       updateIccAvailability();
   
   break;

updateIccAvailability方法调用流程图如下,

updateIccAvailability方法主要逻辑如下,

1,根据不同条件进行判断,注册

registerUiccCardEvents();

2,调用updateExternalState方法将SIM卡的状态通过广播的形式发送出去,

updateExternalState();

updateExternalState方法根据SIM卡的不同状态,调用setExternalState方法进行处理,例如,

READY状态处理如下,

setExternalState(State.READY);

setExternalState方法如下,

setExternalState(newState, false);

setExternalState方法如下,

if (IccCardConstants.INTENT_VALUE_ICC_LOCKED.equals(getIccStateIntentString(mExternalState))) 
      broadcastInternalIccStateChangedIntent(getIccStateIntentString(mExternalState),
            getIccStateReason(mExternalState));
 else 
      broadcastIccStateChangedIntent(getIccStateIntentString(mExternalState),
            getIccStateReason(mExternalState));

broadcastInternalIccStateChangedIntent和 broadcastIccStateChangedIntent都是发送广播,那有什么区别呢?

在使用场景上 broadcastInternalIccStateChangedIntent主要用在

INTENT_VALUE_ICC_LOCKED和INTENT_VALUE_ICC_LOADED 状态，其他状态使用 broadcastIccStateChangedIntent,主要包括 READY、IMSI、LOADED。

IccCardConstants.java中一共定义了十几种SIM卡状态,部分如下,

public static final String INTENT_VALUE_ICC_READY = "READY";
public static final String INTENT_VALUE_ICC_IMSI = "IMSI";
public static final String INTENT_VALUE_ICC_LOADED = "LOADED";
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