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copied!<p>Android already has the constant definition <code>ENCODING_16BIT</code>, <code>ENCODING_7BIT</code>, <code>ENCODING_8BIT</code>, <code>ENCODING_UNKNOWN</code> in the <a href="http://developer.android.com/reference/android/telephony/SmsMessage.html" rel="nofollow">SMSMessage</a> class which correspond to Data Coding Scheme in <a href="http://www.3gpp.org/ftp/Specs/html-info/0338.htm" rel="nofollow">3GPP TS 03.38</a>. However, it's funny that they are not used in return value of public methods.</p> <p>Hence, the best solution is:</p> <ol> <li>Get the whole SMS TPDU bytes using <code>getPdu()</code></li> <li>Parse the bytes according to <a href="http://www.3gpp.org/ftp/Specs/html-info/0340.htm" rel="nofollow">3GPP TS 03.40</a> (section 9) to get the DCS byte (for SMS deliver: 1 byte TP-MTI/MMS/RP/UDHI/SRI, 2-12 bytes TP-OA, 1 byte TP-PID, and then the DCS byte)</li> <li>Parse the DCS byte according to section 5 of 3GPP TS 03.38.</li> </ol> <p>Sample code for parsing the DCS byte is as follow:</p> <pre><code>public static byte getSmsDcsType(byte dcs) { // Notes: // ------ // the (SMS) DCS value according to 3GPP TS 03.38 / TS 23.038 is coded as follow: // 0xxx00xx = GSM 7-bit default alphabet (packed format) // 0xxx01xx = 8-bit data (unpacked-format) // 0xxx10xx = UCS2 uncompressed format // 0xxx11xx = reserved // 10xxxxxx = reserved // 110xxxxx = GSM 7-bit default alphabet (packed format) // 1110xxxx = UCS2 uncompressed format // 111100xx = GSM 7-bit default alphabet (packed format) // 111101xx = 8-bit data (unpacked-format) // 11111xxx = reserved if (((byte) (dcs & (byte) 0x8C) == 0x00) || ((byte) (dcs & (byte) 0xE0) == (byte) 0xC0) || ((byte) (dcs & (byte) 0xFC) == (byte) 0xF0)) { return SmsMessage.ENCODING_7BIT; } else if (((byte) (dcs & (byte) 0x8C) == 0x04) || ((byte) (dcs & (byte) 0xFC) == (byte) 0xF4)) { return SmsMessage.ENCODING_8BIT; } else if (((byte) (dcs & (byte) 0x8C) == 0x08) || ((byte) (dcs & (byte) 0xF0) == (byte) 0xE0)) { return SmsMessage.ENCODING_16BIT; } return SmsMessage.ENCODING_UNKNOWN; } </code></pre>

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