文档数量为零，因此这里有一些信息可以提供帮助。
1) com.google.android.mms.pdu 来自源代码。您需要 Pdu 实用程序。
2) 您从传入 mms 广播的字节数组额外获得通知推送 (intent.getByteArrayExtra("data"))。
3) 将通知推送解析成一个GenericPdu (new PduParser(rawPdu).parse())。
4) 您需要 TransactionSettings 来与运营商的 wap 服务器通信。我在下面的#5 之后得到交易设置。我用：
TransactionSettings transactionSettings = new TransactionSettings(mContext, mConnMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE_MMS).getExtraInfo());
5) 强制通过 wifi 进行网络通信。我使用以下。
private boolean beginMmsConnectivity() {
try {
int result = mConnMgr.startUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE, Phone.FEATURE_ENABLE_MMS);
NetworkInfo info = mConnMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE_MMS);
boolean isAvailable = info != null && info.isConnected() && result == Phone.APN_ALREADY_ACTIVE && !Phone.REASON_VOICE_CALL_ENDED.equals(info.getReason());
return isAvailable;
} catch(Exception e) {
return false;
}
}
6) 然后您需要确保到主机的路由。
private static void ensureRouteToHost(ConnectivityManager cm, String url, TransactionSettings settings) throws IOException {
int inetAddr;
if (settings.isProxySet()) {
String proxyAddr = settings.getProxyAddress();
inetAddr = lookupHost(proxyAddr);
if (inetAddr == -1) {
throw new IOException("Cannot establish route for " + url + ": Unknown host");
} else {
if (!cm.requestRouteToHost(ConnectivityManager.TYPE_MOBILE_MMS, inetAddr))
throw new IOException("Cannot establish route to proxy " + inetAddr);
}
} else {
Uri uri = Uri.parse(url);
inetAddr = lookupHost(uri.getHost());
if (inetAddr == -1) {
throw new IOException("Cannot establish route for " + url + ": Unknown host");
} else {
if (!cm.requestRouteToHost(ConnectivityManager.TYPE_MOBILE_MMS, inetAddr))
throw new IOException("Cannot establish route to " + inetAddr + " for " + url);
}
}
}
这里是lookupHost方法：
private static int lookupHost(String hostname) {
InetAddress inetAddress;
try {
inetAddress = InetAddress.getByName(hostname);
} catch (UnknownHostException e) {
return -1;
}
byte[] addrBytes;
int addr;
addrBytes = inetAddress.getAddress();
addr = ((addrBytes[3] & 0xff) << 24) | ((addrBytes[2] & 0xff) << 16) | ((addrBytes[1] & 0xff) << 8) | (addrBytes[0] & 0xff);
return addr;
}
我还喜欢使用基于反射的方法来改进 ensureRouteToHost 功能：
private static void ensureRouteToHostFancy(ConnectivityManager cm, String url, TransactionSettings settings) throws IOException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
Method m = cm.getClass().getMethod("requestRouteToHostAddress", new Class[] { int.class, InetAddress.class });
InetAddress inetAddr;
if (settings.isProxySet()) {
String proxyAddr = settings.getProxyAddress();
try {
inetAddr = InetAddress.getByName(proxyAddr);
} catch (UnknownHostException e) {
throw new IOException("Cannot establish route for " + url + ": Unknown proxy " + proxyAddr);
}
if (!(Boolean) m.invoke(cm, new Object[] { ConnectivityManager.TYPE_MOBILE_MMS, inetAddr }))
throw new IOException("Cannot establish route to proxy " + inetAddr);
} else {
Uri uri = Uri.parse(url);
try {
inetAddr = InetAddress.getByName(uri.getHost());
} catch (UnknownHostException e) {
throw new IOException("Cannot establish route for " + url + ": Unknown host");
}
if (!(Boolean) m.invoke(cm, new Object[] { ConnectivityManager.TYPE_MOBILE_MMS, inetAddr }))
throw new IOException("Cannot establish route to " + inetAddr + " for " + url);
}
}
7) 在确保到主机的路由之后，您可以从源代码中获取 HttpUtls。我使用 OkHttp 大量修改了我的实现以改进通信。
byte[] rawPdu = HttpUtils.httpConnection(mContext, mContentLocation, null, HttpUtils.HTTP_GET_METHOD, mTransactionSettings.isProxySet(), mTransactionSettings.getProxyAddress(), mTransactionSettings.getProxyPort());
8) 从生成的字节数组中使用 PduParser 解析 GenericPdu。然后您可以提取正文并转换为 MultimediaMessagePdu。
9) 然后你可以迭代 PDU 的各个部分。
使用彩信需要考虑的事项数不胜数。想到的一件事是幻灯片有多烦人，所以我要做的是检测 PDU 中是否有超过 1 个部分，然后我复制标头并创建单独的 MultimediaMessagePdu，我将它们分别保存到手机的 mms 内容提供商.不要忘记复制标题，特别是如果您支持群组消息传递。群消息是另一回事，因为 PDU 中的传入电话号码并不能说明全部情况（MultimediaMessagePdu.mmpdu()）。您使用以下代码提取的标题中有更多联系人。
private HashSet<String> getRecipients(GenericPdu pdu) {
PduHeaders header = pdu.getPduHeaders();
HashMap<Integer, EncodedStringValue[]> addressMap = new HashMap<Integer, EncodedStringValue[]>(ADDRESS_FIELDS.length);
for (int addrType : ADDRESS_FIELDS) {
EncodedStringValue[] array = null;
if (addrType == PduHeaders.FROM) {
EncodedStringValue v = header.getEncodedStringValue(addrType);
if (v != null) {
array = new EncodedStringValue[1];
array[0] = v;
}
} else {
array = header.getEncodedStringValues(addrType);
}
addressMap.put(addrType, array);
}
HashSet<String> recipients = new HashSet<String>();
loadRecipients(PduHeaders.FROM, recipients, addressMap, false);
loadRecipients(PduHeaders.TO, recipients, addressMap, true);
return recipients;
}
这是加载接收者的方法：
private void loadRecipients(int addressType, HashSet<String> recipients, HashMap<Integer, EncodedStringValue[]> addressMap, boolean excludeMyNumber) {
EncodedStringValue[] array = addressMap.get(addressType);
if (array == null) {
return;
}
// If the TO recipients is only a single address, then we can skip loadRecipients when
// we're excluding our own number because we know that address is our own.
if (excludeMyNumber && array.length == 1) {
return;
}
String myNumber = excludeMyNumber ? mTelephonyManager.getLine1Number() : null;
for (EncodedStringValue v : array) {
if (v != null) {
String number = v.getString();
if ((myNumber == null || !PhoneNumberUtils.compare(number, myNumber)) && !recipients.contains(number)) {
// Only add numbers which aren't my own number.
recipients.add(number);
}
}
}
}
这是迭代 MultimediaMessagePdu 部分的方法。
private void processPduAttachments() throws Exception {
if (mGenericPdu instanceof MultimediaMessagePdu) {
PduBody body = ((MultimediaMessagePdu) mGenericPdu).getBody();
if (body != null) {
int partsNum = body.getPartsNum();
for (int i = 0; i < partsNum; i++) {
try {
PduPart part = body.getPart(i);
if (part == null || part.getData() == null || part.getContentType() == null || part.getName() == null)
continue;
String partType = new String(part.getContentType());
String partName = new String(part.getName());
Log.d("Part Name: " + partName);
Log.d("Part Type: " + partType);
if (ContentType.isTextType(partType)) {
} else if (ContentType.isImageType(partType)) {
} else if (ContentType.isVideoType(partType)) {
} else if (ContentType.isAudioType(partType)) {
}
} catch (Exception e) {
e.printStackTrace();
// Bad part shouldn't ruin the party for the other parts
}
}
}
} else {
Log.d("Not a MultimediaMessagePdu PDU");
}
}
还有更多考虑因素，例如动画 GIF 支持，这是完全可能的 :) 一些运营商也支持确认报告和交付报告，除非用户真的想要 mms 交付报告，否则您很可能会忽略这些 wap 通信。