fix #62, properly handle ansi encoded names

app/src/main/kotlin/com/simplemobiletools/contacts/helpers/Constants.kt

@@ -29,7 +29,7 @@ const val DEFAULT_EVENT_TYPE = CommonDataKinds.Event.TYPE_BIRTHDAY
 // export/import
 const val BEGIN_VCARD = "BEGIN:VCARD"
 const val END_VCARD = "END:VCARD"
-const val N = "N:"
+const val N = "N"
 const val TEL = "TEL"
 const val BDAY = "BDAY:"
 const val ANNIVERSARY = "ANNIVERSARY:"

app/src/main/kotlin/com/simplemobiletools/contacts/helpers/QuotedPrintable.kt

@@ -0,0 +1,43 @@
+package com.simplemobiletools.contacts.helpers
+
+import java.io.ByteArrayOutputStream
+
+// https://alvinalexander.com/java/jwarehouse/android/core/java/com/google/android/mms/pdu/QuotedPrintable.java.shtml
+object QuotedPrintable {
+    private const val ESCAPE_CHAR: Byte = '='.toByte()
+    fun decode(value: String?): String {
+        val bytes = value?.toByteArray()
+        if (bytes == null || bytes.isEmpty()) {
+            return ""
+        }
+
+        val buffer = ByteArrayOutputStream()
+        var i = 0
+        while (i < bytes.size) {
+            val b = bytes[i].toInt()
+            if (b == ESCAPE_CHAR.toInt()) {
+                try {
+                    if ('\r' == bytes[i + 1].toChar() && '\n' == bytes[i + 2].toChar()) {
+                        i += 2
+                        continue
+                    }
+
+                    val u = Character.digit(bytes[++i].toChar(), 16)
+                    val l = Character.digit(bytes[++i].toChar(), 16)
+                    if (u == -1 || l == -1) {
+                        return ""
+                    }
+
+                    buffer.write(((u shl 4) + l).toChar().toInt())
+                } catch (e: ArrayIndexOutOfBoundsException) {
+                    return ""
+                }
+
+            } else {
+                buffer.write(b)
+            }
+            i++
+        }
+        return String(buffer.toByteArray())
+    }
+}

app/src/main/kotlin/com/simplemobiletools/contacts/helpers/VcfExporter.kt

@@ -36,7 +36,7 @@ class VcfExporter {
                     for (contact in contacts) {
                         out.writeLn(BEGIN_VCARD)
                         out.writeLn(VERSION_2_1)
-                        out.writeLn("$N${contact.surname};${contact.firstName};${contact.middleName};;")
+                        out.writeLn("$N:${contact.surname};${contact.firstName};${contact.middleName};;")
 
                         contact.phoneNumbers.forEach {
                             out.writeLn("$TEL;${getPhoneNumberLabel(it.type)}:${it.value}")

app/src/main/kotlin/com/simplemobiletools/contacts/helpers/VcfImporter.kt

@@ -82,11 +82,13 @@ class VcfImporter(val activity: SimpleActivity) {
     }
 
     private fun parseNames(names: String) {
-        val nameParts = names.split(";")
-        curSurname = nameParts[0]
-        curFirstName = nameParts[1]
+        val parts = names.split(":")
+        val isANSI = parts.first().toUpperCase().contains("QUOTED-PRINTABLE")
+        val nameParts = parts[1].split(";")
+        curSurname = if (isANSI) QuotedPrintable.decode(nameParts[0]) else nameParts[0]
+        curFirstName = if (isANSI) QuotedPrintable.decode(nameParts[1]) else nameParts[1]
         if (nameParts.size > 2) {
-            curMiddleName = nameParts[2]
+            curMiddleName = if (isANSI) QuotedPrintable.decode(nameParts[2]) else nameParts[2]
         }
     }