Uicc之UiccCard（原）
UiccCard本身并不实现具体的功能，只是作为间接接口向UiccController提供UiccCardApplication对象和完成CatService的创建工作，以及当SIM卡被插入或者拔出时弹出提示框是否需要重启设备。
一、UiccCard的主要功能
public boolean isApplicationOnIcc(IccCardApplicationStatus.AppType type) {}
public UiccCardApplication getApplication(int family) {}
public UiccCardApplication getApplicationIndex(int index) {}
public void registerForAbsent(Handler h, int what, Object obj) {}
public CardState getCardState() {}
由此我们可以看到，UiccCard的主要功能为；
1、创建和向外提供UiccCardApplication对象
2、接受注册SIM卡是否存在的监听器
3、得到当前的SIM状态对象：CardState
二、UiccCard的初始化过程
@UiccController.java
private synchronized void onGetIccCardStatusDone(AsyncResult ar) {
IccCardStatus status = (IccCardStatus)ar.result;
if (mUiccCard == null) {
//创建UiccCard
mUiccCard = new UiccCard(mContext, mCi, status);
} else {
//更新UiccCard
mUiccCard.update(mContext, mCi , status);
}
mIccChangedRegistrants.notifyRegistrants();
}
接下来我们来看UiccCard这个对象的本质，通过其继承关系可以看出他是独立的类，没有继承其他的父类：
public class UiccCard {}
然后看他的构造函数：
public UiccCard(Context c, CommandsInterface ci, IccCardStatus ics) {
mCardState = ics.mCardState;
update(c, ci, ics);
}
构造函数比较简单，主要就是初始化UiccCard中的SIM卡状态mCardState，然后就调用update()方法更新自己的状态。
三、UiccCard的更新过程
public void update(Context c, CommandsInterface ci, IccCardStatus ics) {
synchronized (mLock) {
if (mDestroyed) {
return;
}
CardState oldState = mCardState;
mCardState = ics.mCardState;
mUniversalPinState = ics.mUniversalPinState;
mGsmUmtsSubscriptionAppIndex = ics.mGsmUmtsSubscriptionAppIndex;
mCdmaSubscriptionAppIndex = ics.mCdmaSubscriptionAppIndex;
mImsSubscriptionAppIndex = ics.mImsSubscriptionAppIndex;
mContext = c;
mCi = ci;
//update applications
if (DBG) log(ics.mApplications.length + " applications");
for ( int i = 0; i < mUiccApplications.length; i++) {
if (mUiccApplications[i] == null) {
if (i < ics.mApplications.length) {
//创建UiccCardApplication对象
mUiccApplications[i] = new UiccCardApplication(this, ics.mApplications[i], mContext, mCi);
}
} else if (i >= ics.mApplications.length) {
mUiccApplications[i].dispose();
mUiccApplications[i] = null;
} else {
//更新UiccCardApplication对象
mUiccApplications[i].update(ics.mApplications[i], mContext, mCi);
}
}
if (mUiccApplications.length > 0 && mUiccApplications[0] != null) {
//创建CatService
mCatService = CatService.getInstance(mCi, mContext, this);
} else {
if (mCatService != null) {
mCatService.dispose();
}
mCatService = null;
}
sanitizeApplicationIndexes();
RadioState radioState = mCi.getRadioState();
if (radioState == RadioState.RADIO_ON && mLastRadioState == RadioState.RADIO_ON) {
if (oldState != CardState.CARDSTATE_ABSENT && mCardState == CardState.CARDSTATE_ABSENT) {
//SIM卡被拔出，通知监听者，并弹出提示框是否重启手机
mAbsentRegistrants.notifyRegistrants();
mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_REMOVED, null));
} else if (oldState == CardState.CARDSTATE_ABSENT && mCardState != CardState.CARDSTATE_ABSENT) {
//插入新的SIM卡，并弹出提示框是否重启手机
mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_ADDED, null));
}
}
mLastRadioState = radioState;
}
}
在UiccCard的初始化过程中，完成了非常重要的三个任务：
1、创建和更新UiccCardApplication对象；
2、初始化CatService
3、当检测到SIM卡的拔出或插入动作后，通过mHandler对象弹出提示框是否重启手机
这就是UiccCard的更新过程。
四、UiccCard检测的SIM卡移除/插入操作
前面分析到，UiccCard的update()过程中可以接收到SIM卡状态的改变，当UiccCard检测到SIM卡插入或者拔出的操作后，就会弹出一个提示框，提示是否重启设备。
public void update(Context c, CommandsInterface ci, IccCardStatus ics) {
synchronized (mLock) {
if (radioState == RadioState.RADIO_ON && mLastRadioState == RadioState.RADIO_ON) {
if (oldState != CardState.CARDSTATE_ABSENT && mCardState == CardState.CARDSTATE_ABSENT) {
mAbsentRegistrants.notifyRegistrants();
//拔出SIM卡的操作
mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_REMOVED, null));
} else if (oldState == CardState.CARDSTATE_ABSENT && mCardState != CardState.CARDSTATE_ABSENT) {
//插入SIM卡的操作
mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_ADDED, null));
}
}
mLastRadioState = radioState;
}
}
然后进入Handler中处理：
protected Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg){
switch (msg.what) {
case EVENT_CARD_REMOVED:
onIccSwap(false);
break;
case EVENT_CARD_ADDED:
onIccSwap(true);
break;
default:
loge("Unknown Event " + msg.what);
}
}
};
然后进入onIccSwap()中弹出对话框：
private void onIccSwap(boolean isAdded) {
synchronized (mLock) {
DialogInterface.OnClickListener listener = null;
listener = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
synchronized (mLock) {
if (which == DialogInterface.BUTTON_POSITIVE) {
//点击按钮，重启设备
PowerManager pm = (PowerManager) mContext .getSystemService(Context.POWER_SERVICE);
pm.reboot("SIM is added.");
}
}
}
};
Resources r = Resources.getSystem();
//加载不同的资源
String title = (isAdded) ? r.getString(R.string.sim_added_title) : r.getString(R.string.sim_removed_title);
String message = (isAdded) ? r.getString(R.string.sim_added_message) : r.getString(R.string.sim_removed_message);
String buttonTxt = r.getString(R.string.sim_restart_button);
//弹出Dialog
AlertDialog dialog = new AlertDialog.Builder(mContext)
.setTitle(title)
.setMessage(message)
.setPositiveButton(buttonTxt, listener)
.create();
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
dialog.show();
}
}
这就是弹出提示框的过程。
下面一个章节来介绍UiccCardApplication相关内容。