MMS不調用系統函數實現流程

最近有個需求，不去調用系統界面發送彩信功能。做過發送短信功能的同學可能第一反應是這樣： 
不使用 StartActivity，像發短信那樣，調用一個類似於發短信的方法 
SmsManager smsManager = SmsManager.getDefault(); 
smsManager.sendTextMessage(phoneCode, null, text, null, null); 
可以實現嗎？ 答案是否定的，因爲android上根本就沒有提供發送彩信的接口，如果你想發送彩信，對不起，請調用系統彩信app界面，如下： 

       Intent sendIntent = new Intent(Intent.ACTION_SEND,  Uri.parse("mms://"));
sendIntent.setType("image/jpeg");
String url = "file://sdcard//tmpPhoto.jpg";
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(url));
startActivity(Intent.createChooser(sendIntent, "MMS:"));

但是這種方法往往不能滿足我們的需求，能不能不調用系統界面，自己實現發送彩信呢？經過幾天的努力，終於找到了解決辦法。 
第一步：先構造出你要發送的彩信內容，即構建一個pdu，需要用到以下幾個類，這些類都是從android源碼的MMS應用中mms.pdu包中copy出來的。你需要將pdu包中的所有類 

都拷貝到你的工程中，然後自己酌情調通。 

   final SendReq sendRequest = new SendReq();
   final PduBody pduBody = new PduBody();
final PduPart part = new PduPart();//存放附件，每個附件是一個part，如果添加多個附件，就想body中add多個part。

   pduBody.addPart(partPdu);
   sendRequest.setBody(pduBody);
   final PduComposer composer = new PduComposer(ctx, sendRequest);
final byte[] bytesToSend = composer.make(); //將彩信的內容以及主題等信息轉化成byte數組，準備通過http協議//發送到 ”http://mmsc.monternet.com”;

第二步：發送彩信到彩信中心。 
構建pdu的代碼： 

                    String subject = "測試彩信";
            String recipient = "接收彩信的號碼";//138xxxxxxx
            final SendReq sendRequest = new SendReq();
            final EncodedStringValue[] sub = EncodedStringValue.extract(subject);
            if (sub != null && sub.length > 0) {
                sendRequest.setSubject(sub[0]);
            }
            final EncodedStringValue[] phoneNumbers = EncodedStringValue.extract(recipient);
            if (phoneNumbers != null && phoneNumbers.length > 0) {
                sendRequest.addTo(phoneNumbers[0]);
            }
            final PduBody pduBody = new PduBody();
            final PduPart part = new PduPart();
            part.setName("sample".getBytes());
            part.setContentType("image/png".getBytes());
            String furl = "file://mnt/sdcard//1.jpg";

                    final PduPart partPdu = new PduPart();
                    partPdu.setCharset(CharacterSets.UTF_8);//UTF_16
                    partPdu.setName(part.getName());
                    partPdu.setContentType(part.getContentType());
                    partPdu.setDataUri(Uri.parse(furl));
                    pduBody.addPart(partPdu);

            sendRequest.setBody(pduBody);
            final PduComposer composer = new PduComposer(ctx, sendRequest);
            final byte[] bytesToSend = composer.make();

            Thread t = new Thread(new Runnable() {

                @Override
                public void run() {
                    try {
                        HttpConnectInterface.sendMMS(ctx,  bytesToSend);
//
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            });
            t.start();
發送pdu到彩信中心的代碼：
        public static String mmscUrl = "http://mmsc.monternet.com";
//  public static String mmscUrl = "http://www.baidu.com/";
    public static String mmsProxy = "10.0.0.172";
    public static String mmsProt = "80";

       private static String HDR_VALUE_ACCEPT_LANGUAGE = "";
    // Definition for necessary HTTP headers.
       private static final String HDR_KEY_ACCEPT = "Accept";
       private static final String HDR_KEY_ACCEPT_LANGUAGE = "Accept-Language";

    private static final String HDR_VALUE_ACCEPT =
        "*/*, application/vnd.wap.mms-message, application/vnd.wap.sic";
public static byte[] sendMMS(Context context, byte[] pdu)throws IOException{
        HDR_VALUE_ACCEPT_LANGUAGE = getHttpAcceptLanguage();

        if (mmscUrl == null) {
            throw new IllegalArgumentException("URL must not be null.");
        }

        HttpClient client = null;
        try {
            // Make sure to use a proxy which supports CONNECT.
            client = HttpConnector.buileClient(context);
            HttpPost post = new HttpPost(mmscUrl);
            //mms PUD START
            ByteArrayEntity entity = new ByteArrayEntity(pdu);
            entity.setContentType("application/vnd.wap.mms-message");
            post.setEntity(entity);
            post.addHeader(HDR_KEY_ACCEPT, HDR_VALUE_ACCEPT);
            post.addHeader(HDR_KEY_ACCEPT_LANGUAGE, HDR_VALUE_ACCEPT_LANGUAGE);
            //mms PUD END
            HttpParams params = client.getParams();
            HttpProtocolParams.setContentCharset(params, "UTF-8");
            HttpResponse response = client.execute(post);

            LogUtility.showLog(tag, "111");
            StatusLine status = response.getStatusLine();
            LogUtility.showLog(tag, "status "+status.getStatusCode());
            if (status.getStatusCode() != 200) { // HTTP 200 is not success.
                LogUtility.showLog(tag, "!200");
                throw new IOException("HTTP error: " + status.getReasonPhrase());
            }
            HttpEntity resentity = response.getEntity();
            byte[] body = null;
            if (resentity != null) {
                try {
                    if (resentity.getContentLength() > 0) {
                        body = new byte[(int) resentity.getContentLength()];
                        DataInputStream dis = new DataInputStream(resentity.getContent());
                        try {
                            dis.readFully(body);
                        } finally {
                            try {
                                dis.close();
                            } catch (IOException e) {
                                Log.e(tag, "Error closing input stream: " + e.getMessage());
                            }
                        }
                    }
                } finally {
                    if (entity != null) {
                        entity.consumeContent();
                    }
                }
            }
            LogUtility.showLog(tag, "result:"+new String(body));
            return body;
        }  catch (IllegalStateException e) {
            LogUtility.showLog(tag, "",e);
//            handleHttpConnectionException(e, mmscUrl);
        } catch (IllegalArgumentException e) {
            LogUtility.showLog(tag, "",e);
//            handleHttpConnectionException(e, mmscUrl);
        } catch (SocketException e) {
            LogUtility.showLog(tag, "",e);
//            handleHttpConnectionException(e, mmscUrl);
        } catch (Exception e) {
            LogUtility.showLog(tag, "",e);
            //handleHttpConnectionException(e, mmscUrl);
        } finally {
            if (client != null) {
//                client.;
            }
        }
        return new byte[0];
    }

更多詳細內容請瀏覽我的博客http://www.91dota.com/ 
至此，彩信的發送算是完成了。 
總結：android的彩信相關操作都是沒有api的，包括彩信的讀取、發送、存儲。這些過程都是需要手動去完成的。想要弄懂這些過程，需要仔細閱讀android源碼中的mms這個app。還有就是去研究mmssms.db數據庫，因爲彩信的讀取和存儲其實都是對mmssms.db這個數據庫的操作過程。而且因爲這個是共享的數據庫，所以只能用ContentProvider這個組件去操作db。 

總之，想要研究彩信這塊(包括普通短信)，你就必須的研究mmssms.db的操作方法，多多瞭解每個表對應的哪個uri，每個uri能提供什麼樣的操作，那些字段代表短信的那些屬性等。 
最後推薦個好用的sqlite查看工具：SQLite Database Browser。