private SmsDatum GetSms(global::Android.Net.Uri uri)
{
SmsDatum smsDatum = null;
ICursor queryResults = null;
try
{
queryResults = Application.Context.ContentResolver.Query(uri, null, null, null, null);
if (queryResults != null && queryResults.MoveToNext())
{
string protocol = queryResults.GetString(queryResults.GetColumnIndex("protocol"));
var type = queryResults.GetInt(queryResults.GetColumnIndex("type"));
int sentMessageType;
// see the Backwards Compatibility article for more information
#if __ANDROID_19__
if (Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat)
{
sentMessageType = (int)SmsMessageType.Sent; // API level 19
}
else
#endif
{
sentMessageType = 2;
}
if (type != sentMessageType) //note:protocol is never coming in null for me
{
return(null);
}
string toNumber = queryResults.GetString(queryResults.GetColumnIndexOrThrow("address"));
long unixTimeMS = queryResults.GetLong(queryResults.GetColumnIndexOrThrow("date"));
string body = queryResults.GetString(queryResults.GetColumnIndexOrThrow("body"));
DateTimeOffset timestamp = DateTimeOffset.FromUnixTimeMilliseconds(unixTimeMS);
if (!string.IsNullOrWhiteSpace(body))
{
Contact contact = SensusServiceHelper.GetContactAsync(toNumber).Result;
bool isContact = contact != null;
smsDatum = new SmsDatum(timestamp, null, toNumber, body, true, isContact, contact?.Name, contact?.Email);
}
}
}
finally
{
// always close cursor
try
{
queryResults.Close();
}
catch
{
}
}
return(smsDatum);
}
public override void OnChange(bool selfChange, global::Android.Net.Uri uri)
{
try
{
// for some reason, we get multiple calls to OnChange for the same outgoing text. ignore repeats.
if (_mostRecentlyObservedSmsURI != null && uri.ToString() == _mostRecentlyObservedSmsURI)
{
return;
}
SmsDatum datum = null;
// process MMS: https://stackoverflow.com/questions/3012287/how-to-read-mms-data-in-android
bool isMMS = uri.ToString().StartsWith("content://sms/raw") || uri.ToString().StartsWith("content://mms-sms");
if (isMMS)
{
datum = GetMostRecentMMS();
}
else
{
datum = GetSms(uri);
}
if (!string.IsNullOrWhiteSpace(datum?.Message))
{
_outgoingSmsCallback?.Invoke(datum);
if (isMMS)
{
_mostRecentMmsTimestamp = datum.Timestamp;
}
else
{
_mostRecentlyObservedSmsURI = uri.ToString();
}
}
}
catch (Exception ex)
{
// something is probably wrong with our implementation. each manufacturer does things a bit different.
SensusServiceHelper.Get().Logger.Log("Exception in " + nameof(OnChange) + ": " + ex.Message, LoggingLevel.Normal, GetType());
}
}
private SmsDatum GetMostRecentMMS()
{
SmsDatum mmsDatum = null;
ICursor queryResults = null;
try
{
// get the most recent conversation
queryResults = Application.Context.ContentResolver.Query(global::Android.Net.Uri.Parse("content://mms-sms/conversations/"), null, null, null, "_id");
if (queryResults.MoveToLast())
{
long unixTimeMS = queryResults.GetLong(queryResults.GetColumnIndexOrThrow("date")) * 1000;
int messageId = queryResults.GetInt(queryResults.GetColumnIndexOrThrow("_id"));
ICursor innerQueryResults = Application.Context.ContentResolver.Query(global::Android.Net.Uri.Parse("content://mms/part"), null, "mid=" + messageId, null, null);
try
{
if (innerQueryResults.MoveToFirst())
{
while (true)
{
if (innerQueryResults.GetString(innerQueryResults.GetColumnIndexOrThrow("ct")) == "text/plain")
{
string toNumber = GetAddressNumber(messageId, 151); // 137 is the from and 151 is the to
DateTimeOffset timestamp = DateTimeOffset.FromUnixTimeMilliseconds(unixTimeMS);
// get the message body
string data = innerQueryResults.GetString(innerQueryResults.GetColumnIndexOrThrow("_data"));
string body;
if (data == null)
{
body = innerQueryResults.GetString(innerQueryResults.GetColumnIndexOrThrow("text"));
}
else
{
int partId = innerQueryResults.GetInt(innerQueryResults.GetColumnIndexOrThrow("_id"));
body = GetMmsText(partId);
}
// only keep if we have a message body
if (!string.IsNullOrWhiteSpace(body) && _mostRecentMmsTimestamp != timestamp)
{
mmsDatum = new SmsDatum(timestamp, null, toNumber, body, true);
}
break;
}
else
{
if (!innerQueryResults.MoveToNext())
{
break;
}
}
}
}
}
finally
{
// always close cursor
try
{
innerQueryResults.Close();
}
catch
{
}
}
}
}
catch (Exception ex)
{
string message = "Exception while getting MMS: " + ex.Message;
SensusServiceHelper.Get().Logger.Log(message, LoggingLevel.Normal, GetType());
// throw a NotSupportedException, as our implementation is probably not correct -- and
// will never work for -- this device. this message will cause the probe to be disabled
// if thrown on protocol startup; otherwise, it will simply be ignored. one reason this
// is important is that sensus will continue to foreground the app in an attempt to get
// the probe started. but it will always fail, and this will really irritate the user.
throw new NotSupportedException(message, ex);
}
finally
{
// always close cursor
try
{
queryResults.Close();
}
catch
{
}
}
return(mmsDatum);
}
