android Sim卡鎖定 pin解鎖流程學習

1.Android自帶的pin解鎖部份在framework/base/policy/src/com/android/internal/policy/impl/SimUnlockScreen.java

Sim鎖定后開機，會調用這個類，show出“請輸入pin”的解鎖介面，輸入pin密碼后，點擊“ok”，調用checkPin( )

通过启动一个线程CheckSimPin来调用TelephonyManager的supplyPin()接口，并注册一个类似于Callback的虚函数onSimLockChangedResponse()并实现之，这样当supplyPin()调用返回时，触发该Callback函数。

privatevoidcheckPin() {

//…….//

new CheckSimPin(mPinText.getText().toString()) {

void onSimLockChangedResponse(boolean success) {

if (mSimUnlockProgressDialog != null) {

mSimUnlockProgressDialog.hide();

}

if (success) {

mUpdateMonitor.reportSimPinUnlocked();

mCallback.goToUnlockScreen();

} else {

mHeaderText.setText(R.string.keyguard_password_wrong_pin_code);

mPinText.setText("");

mEnteredDigits = 0;

}

mCallback.pokeWakelock();

}

}.start();

}

privateabstractclassCheckSimPinextends Thread {

privatefinal String mPin;

protected CheckSimPin(String pin) {

mPin = pin;

}

abstractvoid onSimLockChangedResponse(boolean success);

@Override

publicvoid run() {

try {

finalboolean result = ITelephony.Stub.asInterface(ServiceManager

.checkService("phone")).supplyPin(mPin);//result返回的值來自PhoneInterfaceManager中

post(new Runnable() {

publicvoid run() {

onSimLockChangedResponse(result);

}

});

} catch (RemoteException e) {

post(new Runnable() {

publicvoid run() {

onSimLockChangedResponse(false);

}

});

}

2.supplyPin()接口的具体实现在PhoneInterfaceManager中，代码位置在packages/apps/Phone/src/com/android/phone/PhoneInterfaceManager.java。

首先创建一个线程并启动来维护一个Handler用于接收RIL上来的消息(SUPPLY_PIN_COMPLETE)。随后调用IccCard的supplyPin()方法并将Handler注册上去，此后一直wait，直到Hander收到指定消息后将其唤醒返回，并将操作结果传给其调用者。

publicboolean supplyPin(String pin) {

enforceModifyPermission();

final CheckSimPin checkSimPin = new CheckSimPin(mPhone.getIccCard());

checkSimPin.start();

return checkSimPin.checkPin(pin);

}

privatestaticclass CheckSimPin extends Thread {

privatefinal IccCard mSimCard;

privatebooleanmDone = false;

privatebooleanmResult = false;

// For replies from SimCard interface

private Handler mHandler;

// For async handler to identify request type

privatestaticfinalintSUPPLY_PIN_COMPLETE = 100;

public CheckSimPin(IccCard simCard) {

mSimCard = simCard;

}

@Override

publicvoid run() {

Looper.prepare();

synchronized (CheckSimPin.this) {

mHandler = new Handler() {

@Override

publicvoid handleMessage(Message msg) {

AsyncResult ar = (AsyncResult) msg.obj;

switch (msg.what) {

caseSUPPLY_PIN_COMPLETE:

Log.d(LOG_TAG, "SUPPLY_PIN_COMPLETE");

synchronized (CheckSimPin.this) {

mResult = (ar.exception == null);//若ar.exception為null，則說明驗證通過mResult = true

mDone = true;

CheckSimPin.this.notifyAll();

}

break;

}

};

CheckSimPin.this.notifyAll();

}

Looper.loop();

}

synchronizedboolean checkPin(String pin) {

while (mHandler == null) {

try {

wait();

} catch (InterruptedException e) {

Thread.currentThread().interrupt();

}

Message callback = Message.obtain(mHandler, SUPPLY_PIN_COMPLETE);

mSimCard.supplyPin(pin, callback);

while (!mDone) {

try {

Log.d(LOG_TAG, "wait for done");

wait();

} catch (InterruptedException e) {

// Restore the interrupted status

Thread.currentThread().interrupt();

}

Log.d(LOG_TAG, "done");

Log.d(LOG_TAG, "mResult : "+mResult);

returnmResult;

}

3.接下來IccCard.java在frameworks/base/telephony/java/com/android/internal/telephony/IccCard.java

調用RIL.java的supplyPin()見第4條。

創建一個Handler來接受EVENT_PINPUK_DONE，當Handler接收到EVENT_PINPUK_DONE，

publicvoid supplyPin (String pin, Message onComplete) {

mPhone.mCM.supplyIccPin(pin, mHandler.obtainMessage(EVENT_PINPUK_DONE, onComplete));

Log.i("IccCard!!!","supplyPin");

}

protected Handler mHandler = new Handler() {

@Override

publicvoid handleMessage(Message msg){

AsyncResult ar;

int serviceClassX;

serviceClassX = CommandsInterface.SERVICE_CLASS_VOICE +

CommandsInterface.SERVICE_CLASS_DATA +

CommandsInterface.SERVICE_CLASS_FAX;

if (!mPhone.mIsTheCurrentActivePhone) {

Log.e(mLogTag, "Received message " + msg + "[" + msg.what

+ "] while being destroyed. Ignoring.");

return;

}

switch (msg.what) {

//………//

caseEVENT_PINPUK_DONE:

ar = (AsyncResult)msg.obj;

// TODO should abstract these exceptions

AsyncResult.forMessage(((Message)ar.userObj)).exception

= ar.exception;

mPhone.mCM.getIccCardStatus(

obtainMessage(EVENT_REPOLL_STATUS_DONE, ar.userObj));

break;

caseEVENT_REPOLL_STATUS_DONE:

ar = (AsyncResult)msg.obj;

getIccCardStatusDone(ar);

((Message)ar.userObj).sendToTarget();

break;

//…………………….//

default:

Log.e(mLogTag, "[IccCard] Unknown Event " + msg.what);

}

};

4. frameworks/base/telephony/java/com/android/internal/telephony/RIL.java中的supplyIccPin（）

@Overridepublicvoid

supplyIccPin(String pin, Message result) {

supplyIccPinForApp(pin, null, result);

}

@Overridepublicvoid

supplyIccPinForApp(String pin, String aid, Message result) {

//Note: This RIL request has not been renamed to ICC,

// but this request is also valid for SIM and RUIM

RILRequest rr = RILRequest.obtain(RIL_REQUEST_ENTER_SIM_PIN, result);

if (RILJ_LOGD) riljLog(rr.serialString() + "> " + requestToString(rr.mRequest));

rr.mp.writeInt(2);

rr.mp.writeString(pin);

rr.mp.writeString(aid);

send(rr); //通过socket 向 rild 发送 RIL_REQUEST_ENTER_SIM_PIN 请求

}

後面的c实现部分，目前沒有去看。

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