Android 7.0 UICC 分析

Posted 2020-08-23 kaifyou

本文讲解UiccCard类

/frameworks/opt/telephony/src/java/com/android/internal/telephony/uicc/UiccCard.java

UICCController 类的onGetIccCardStatusDone() 方法，根据获取的SIM状态信息IccCardStatus 创建或更新UiccCard 对象；

    private synchronized void onGetIccCardStatusDone(AsyncResult ar, Integer index) {
        .......
        IccCardStatus status = (IccCardStatus)ar.result;

        if (mUiccCards[index] == null) {
            //Create new card
            mUiccCards[index] = new UiccCard(mContext, mCis[index], status, index);
        } else {
            //Update already existing card
            mUiccCards[index].update(mContext, mCis[index] , status);
        }
        .......
    }

 

UiccCard 类的构造方法，同样会调用update() 方法更新SIM 卡状态信息；

    public UiccCard(Context c, CommandsInterface ci, IccCardStatus ics, int phoneId) {
        mCardState = ics.mCardState;
        mPhoneId = phoneId;
        update(c, ci, ics);
    }

UiccCard 类的 update() 方法：

1、根据IccCardStatus 参数在mUiccApplication 列表中匹配UiccCardApplication 对象，通过UiccCardApplication 类的update() 方法更新，否则创建一个UiccCardApplication 对象；

2、调用createAndUpdateCatService() 方法创建或更新CatService 对象；

3、获取Radiostate状态，更新CardState，发出SIM卡插拔消息；

    public void update(Context c, CommandsInterface ci, IccCardStatus ics) {
             ........
            //update applications
            if (DBG) log(ics.mApplications.length + " applications");
            for ( int i = 0; i < mUiccApplications.length; i++) {
                if (mUiccApplications[i] == null) {
                    //Create newly added Applications
                    if (i < ics.mApplications.length) {
                        mUiccApplications[i] = new UiccCardApplication(this,
                                ics.mApplications[i], mContext, mCi);
                    }
                } else if (i >= ics.mApplications.length) {
                    //Delete removed applications
                    mUiccApplications[i].dispose();
                    mUiccApplications[i] = null;
                } else {
                    //Update the rest
                    mUiccApplications[i].update(ics.mApplications[i], mContext, mCi); //调用UiccCardApplication.java
                }
            }

            createAndUpdateCatService(); //CatService
            ..........
            RadioState radioState = mCi.getRadioState();
            if (DBG) log("update: radioState=" + radioState + " mLastRadioState="
                    + mLastRadioState);
            // No notifications while radio is off or we just powering up
            if (radioState == RadioState.RADIO_ON && mLastRadioState == RadioState.RADIO_ON) {
                if (oldState != CardState.CARDSTATE_ABSENT &&
                        mCardState == CardState.CARDSTATE_ABSENT) {
                    if (DBG) log("update: notify card removed");
                    mAbsentRegistrants.notifyRegistrants();
                    mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_REMOVED, null));
                } else if (oldState == CardState.CARDSTATE_ABSENT &&
                        mCardState != CardState.CARDSTATE_ABSENT) {
                    if (DBG) log("update: notify card added");
                    mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_ADDED, null));
                }
            }
            mLastRadioState = radioState;
        }
    }

 

createAndUpdateCatService() 方法，创建或更新CatService：

    protected void createAndUpdateCatService() {
        if (mUiccApplications.length > 0 && mUiccApplications[0] != null) {
            // Initialize or Reinitialize CatService
            if (mCatService == null) {
                mCatService = CatService.getInstance(mCi, mContext, this, mPhoneId);
            } else {
                ((CatService)mCatService).update(mCi, mContext, this);
            }
        } else {
            if (mCatService != null) {
                mCatService.dispose();
            }
            mCatService = null;
        }
    }

消息EVENT_CARD_REMOVED、　EVENT_CARD_ADDED 在UiccCard 类的handleMessage()方法中处理：

    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;
                .........
            }
        }
    };

onIccSwap() 方法，判断是否共卡座，如果是直接返回，否则调用promptForRestart()：

    private void onIccSwap(boolean isAdded) {

        boolean isHotSwapSupported = mContext.getResources().getBoolean(
                R.bool.config_hotswapCapable);

        if (isHotSwapSupported) { //给国内双卡共卡座设计留下接口
            log("onIccSwap: isHotSwapSupported is true, don‘t prompt for rebooting");
            return;
        }
        log("onIccSwap: isHotSwapSupported is false, prompt for rebooting");

        promptForRestart(isAdded);
    }

promptForRestart() 方法，切换sim卡，弹出提示框：

    private void promptForRestart(boolean isAdded) {
        synchronized (mLock) {
            final Resources res = mContext.getResources();
            final String dialogComponent = res.getString(
                    R.string.config_iccHotswapPromptForRestartDialogComponent);
            if (dialogComponent != null) {
                Intent intent = new Intent().setComponent(ComponentName.unflattenFromString(
                        dialogComponent)).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                        .putExtra(EXTRA_ICC_CARD_ADDED, isAdded);
                try {
                    mContext.startActivity(intent);
                    return;
                } catch (ActivityNotFoundException e) {
                    loge("Unable to find ICC hotswap prompt for restart activity: " + e);
                }
            }

            // TODO: Here we assume the device can‘t handle SIM hot-swap
            //      and has to reboot. We may want to add a property,
            //      e.g. REBOOT_ON_SIM_SWAP, to indicate if modem support
            //      hot-swap.
            DialogInterface.OnClickListener listener = null;


            // TODO: SimRecords is not reset while SIM ABSENT (only reset while
            //       Radio_off_or_not_available). Have to reset in both both
            //       added or removed situation.
            listener = new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    synchronized (mLock) {
                        if (which == DialogInterface.BUTTON_POSITIVE) {
                            if (DBG) log("Reboot due to SIM swap");
                            PowerManager pm = (PowerManager) mContext
                                    .getSystemService(Context.POWER_SERVICE);
                            pm.reboot("SIM is added.");
                        }
                    }
                }

            };

            Resources r = Resources.getSystem();

            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);

            AlertDialog dialog = new AlertDialog.Builder(mContext)
            .setTitle(title)
            .setMessage(message)
            .setPositiveButton(buttonTxt, listener)
            .create();
            dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
            dialog.show();
        }
    }