android - 如何在 Android 中通过彩信发送图像？

Question

我正在开发一个多媒体应用程序。我正在通过相机拍摄一张图像，并希望将该图像与文本一起发送到其他号码。但我不知道如何通过彩信发送图像。

Answer 1

MMS 只是一个 http-post 请求。您应该使用额外的网络功能来执行请求:

final ConnectivityManager connMgr = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
final int result = connMgr.startUsingNetworkFeature( ConnectivityManager.TYPE_MOBILE, Phone.FEATURE_ENABLE_MMS);

如果你得到带有 Phone.APN_REQUEST_STARTED 值的结果，你必须等待正确的状态。注册BroadCastReciver，等待Phone.APN_ALREADY_ACTIVE出现:

final IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
context.registerReceiver(reciver, filter);

如果连接后台准备好，构建内容并执行请求。如果您想使用 android 的内部代码执行此操作，请使用以下代码:

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();

    if (parts != null) {
        for (MMSPart part : parts) {
            final PduPart partPdu = new PduPart();
            partPdu.setName(part.Name.getBytes());
            partPdu.setContentType(part.MimeType.getBytes());
            partPdu.setData(part.Data);
            pduBody.addPart(partPdu);
        }
    }

    sendRequest.setBody(pduBody);

    final PduComposer composer = new PduComposer(this.context, sendRequest);
    final byte[] bytesToSend = composer.make();

    HttpUtils.httpConnection(context, 4444L, MMSCenterUrl,
            bytesToSendFromPDU, HttpUtils.HTTP_POST_METHOD, !TextUtils
                    .isEmpty(MMSProxy), MMSProxy, port);

MMSCenterUrl:来自 MMS-APNs 的 url，MMSProxy:来自 MMS-APNs 的代理，port:来自 MMS-APNs 的端口

请注意，有些类来自内部包。需要从 android git 下载。

请求应该使用来自用户 apn-space...code.. 的 url 完成:

public class APNHelper {

public class APN {
    public String MMSCenterUrl = "";
    public String MMSPort = "";
    public String MMSProxy = ""; 
}

public APNHelper(final Context context) {
    this.context = context;
}   

public List<APN> getMMSApns() {     
    final Cursor apnCursor = this.context.getContentResolver().query(Uri.withAppendedPath(Telephony.Carriers.CONTENT_URI, "current"), null, null, null, null);
if ( apnCursor == null ) {
        return Collections.EMPTY_LIST;
    } else {
        final List<APN> results = new ArrayList<APN>(); 
            if ( apnCursor.moveToFirst() ) {
        do {
            final String type = apnCursor.getString(apnCursor.getColumnIndex(Telephony.Carriers.TYPE));
            if ( !TextUtils.isEmpty(type) && ( type.equalsIgnoreCase(Phone.APN_TYPE_ALL) || type.equalsIgnoreCase(Phone.APN_TYPE_MMS) ) ) {
                final String mmsc = apnCursor.getString(apnCursor.getColumnIndex(Telephony.Carriers.MMSC));
                final String mmsProxy = apnCursor.getString(apnCursor.getColumnIndex(Telephony.Carriers.MMSPROXY));
                final String port = apnCursor.getString(apnCursor.getColumnIndex(Telephony.Carriers.MMSPORT));                  
                final APN apn = new APN();
                apn.MMSCenterUrl = mmsc;
                apn.MMSProxy = mmsProxy;
                apn.MMSPort = port;
                results.add(apn);
            }
        } while ( apnCursor.moveToNext() ); 
             }              
        apnCursor.close();
        return results;
    }
}

private Context context;

}