读取UIM卡中的短信

MessageBoxActivity.java
private void startQuery{
    if(SIMCARD.equals(boxType)){
        if(phoneId == 1){
            mQueryHandler.startQuery(9, null, uri_icc1, null, null, null, null);
        }
    }
}

private AsyncQueryHandler mQueryHandler = null;
onCreate() mQueryHandler = new QueryHandler(mContentResolver, this);

private class QueryHandler extends AsyncQueryHandler{
    protected void onQueryComplete(int token, Object cookie, Cursor cursor){

    }
}

查看startQuery函数
AsyncQueryHandler.java
public void startQuery(int token, Object cookie, Uri uri, String[] projection, String selection, String[] selectionArgs, String orderBy){
    Message msg = mWorkerThreadHandler.obtainMessage(token);
    msg.arg1 = EVENT_ARG_QUERY;
    WorkerArgs args = new WorkerArgs();
    args.handler = this;  //这里的handler是当前类中的
    args.uri = uri;
    ...
    msg.obj = args;
    mWorkerThreadHandler.sendMessage(msg);
}

mWorkerThreadHandler = createHandler(sLooper); -> new WorkerHandler(looper);
protected class WorkerHandler extends Handler{
    public void handleMessage(Message msg){
        WorkerArs args = (WorkerArgs)msg.obj;
        int event = msg.arg1;
        switch(event){
            case EVENT_ARG_QUERY:
                Cursor cursor;   
                    curosr = resolver.query(args.uri, args.projection, args.selection, args.selectionArgs, args.orderBy);
                args.result = cursor;
            break;
        }
        Message reply = args.handler.obtaionMessage(token);
        reply.obj = args;
        reply.arg1 = msg.arg1;
        reply.sendToTarget();
    }
}

public void handleMessage(Message msg){
    WorkerArgs args = (WorkerArgs)msg.obj;
    int token = msg.what;
    int event = msg.arg1;
    switch(event){
        case EVENT_ARG_QUERY:
            onQueryComplete(token, args.cookie, (Cursor)args.result);
        break;
    }
}

MessageBoxActivity.java 重写onQueryComplete
protected void onQueryComplete(int token, Object cookie, Cursor cursor){
    if(cursor != null) { 
        mListAdapter = new MessageSimListAdapter(mParent, cursor);
        mMsgList.setAdapter(mListAdapter);
        mMsgList.setOnCreateContextMenuListener(mSimMsgListOnCreateContextMenuListener);
        mMsgList.setOnItemClickListener(mOnItemClickListener);
        updateState(SHOW_LIST);
    }
    
} 

总结一下：

在MessageBoxActivity中，创建继承自AsyncQueryHandler的类QueryHandler，重写方法onQueryComplete
新建类QueryHandler对象，调用AsyncQueryHandler中的方法startQuery，参数为Uri等，
在方法startQuery中，利用内部类WorkerHandler的对象mWorkerThreadHandler，处理查询消息，这是一个继承自Handler的类。
查询完成后，让AsyncQueryHandler的handleMessage来处理查询完成后的事情。
调用的是onQueryComplete，而QueryHandler已经重写了，因此实际调用的是MessageBoxActivity中的QueryHandler的onQueryComplete

mQueryHandler.startQuery(9, null, uri_icc1, null, null, null, null);

由于我们是查看UIM卡中的短信，需要继续查看SmsProvider.java中的细节

从LOG来看
public Cursor query(Uri url, ...){
    Log.i("SmsProvider","query SMS_INBOX"+match);
}
I/SmsProvider(  341): query SMS_INBOX86

default: 
    if(match == SMS_ALL_ICC+MAX_MATCH_TYPE){
        return getAllMessagesFromIcc(getPhoneId(match));
    }

private Cursor getAllMessagesFromIcc(int phoneId){
    SmsManager smsManager = SmsManager.getDefault(phoneId);
    ArrayList<SmsMessage> messages = smsManager.getAllMessagesFromIcc();

}

查看SmsManager.java
public ArrayList<SmsMessage> getAllMessageFromIcc(){
    ISms iccISms = ISms.Stub.asInterface(ServiceManager.getService(PhoneFactory.getServiceName("isms",mPhoneId)));
    if(iccIsms != null)
         records = iccISms.getAllMessagesFromIccEf();

    return createMessageListFromRawRecords(records);
}

RuimSmsInterfaceManager.java
public List<SmsRawData> getAllMessagesFromIccEf(){
    mPhone.getIccFileHandler().loadEFLinearFexedAll(IccConstants.EF_SMS, response);
}
IccFileHandler.java
public void loadEFLinearFixedAll(int fileid, Message onLoaded){
    Message response = obtainMessage(EVENT_GET_RECORD_SIZE_DONE, new LoadLinearFexedContext(fileid, onLoaded));
    phone.mCM.iccIO(COMMAND_GET_RESPONSE, fileid, getEFPath(fileid), 0, 0, GET_RESPONSE_EF_SIZE_BYTES, null, null, response);
}
RIL.java
public void iccIO(int command, int fileid, String path, int p1, int p2, int p3, String data, Stirng pin2, Message result){
    RILRequest rr = RILRequest.obtain(RIL_REQUEST_SIM_IO, result);
    rr.mp.writeInt(command);
    rr.mp.writeInt(fileid);
    ...
    send(rr);
}