create a vcf file contacts exporter

app/build.gradle

@@ -41,7 +41,7 @@ ext {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:3.7.3'
+    implementation 'com.simplemobiletools:commons:3.7.4'
     implementation 'joda-time:joda-time:2.9.9'
 
     debugImplementation "com.squareup.leakcanary:leakcanary-android:$leakCanaryVersion"

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

@@ -33,6 +33,7 @@ val ANNIVERSARY = "ANNIVERSARY:"
 val PHOTO = "PHOTO"
 val EMAIL = "EMAIL"
 val BASE64 = "BASE64"
+val VERSION_2_1 = "VERSION:2.1"
 
 // phone number/email types
 val CELL = "CELL"
@@ -45,3 +46,4 @@ val WORK_FAX = "WORK;FAX"
 val HOME_FAX = "HOME;FAX"
 val PAGER = "PAGER"
 val MOBILE = "MOBILE"
+val VOICE = "VOICE"

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

@@ -1,7 +1,9 @@
 package com.simplemobiletools.contacts.helpers
 
+import android.provider.ContactsContract.CommonDataKinds
 import com.simplemobiletools.commons.activities.BaseSimpleActivity
 import com.simplemobiletools.commons.extensions.getFileOutputStream
+import com.simplemobiletools.commons.extensions.writeLn
 import com.simplemobiletools.contacts.helpers.VcfExporter.ExportResult.*
 import com.simplemobiletools.contacts.models.Contact
 import java.io.File
@@ -23,7 +25,28 @@ class VcfExporter() {
 
             it.bufferedWriter().use { out ->
                 for (contact in contacts) {
+                    out.writeLn(BEGIN_VCARD)
+                    out.writeLn(VERSION_2_1)
+                    out.writeLn("$N${contact.surname};${contact.firstName};${contact.middleName};;")
 
+                    contact.phoneNumbers.forEach {
+                        out.writeLn("$TEL;${getPhoneNumberLabel(it.type)}:${it.value}")
+                    }
+
+                    contact.emails.forEach {
+                        val type = getEmailTypeLabel(it.type)
+                        val delimiterType = if (type.isEmpty()) "" else ";$type"
+                        out.writeLn("$EMAIL$delimiterType:${it.value}")
+                    }
+
+                    contact.events.forEach {
+                        if (it.type == CommonDataKinds.Event.TYPE_BIRTHDAY) {
+                            out.writeLn("$BDAY:${it.value}")
+                        }
+                    }
+
+                    out.writeLn(END_VCARD)
+                    contactsExported++
                 }
             }
         }
@@ -34,4 +57,22 @@ class VcfExporter() {
             else -> EXPORT_OK
         })
     }
+
+    private fun getPhoneNumberLabel(type: Int) = when (type) {
+        CommonDataKinds.Phone.TYPE_MOBILE -> CELL
+        CommonDataKinds.Phone.TYPE_HOME -> HOME
+        CommonDataKinds.Phone.TYPE_WORK -> WORK
+        CommonDataKinds.Phone.TYPE_MAIN -> PREF
+        CommonDataKinds.Phone.TYPE_FAX_WORK -> WORK_FAX
+        CommonDataKinds.Phone.TYPE_FAX_HOME -> HOME_FAX
+        CommonDataKinds.Phone.TYPE_PAGER -> PAGER
+        else -> VOICE
+    }
+
+    private fun getEmailTypeLabel(type: Int) = when (type) {
+        CommonDataKinds.Email.TYPE_HOME -> HOME
+        CommonDataKinds.Email.TYPE_WORK -> WORK
+        CommonDataKinds.Email.TYPE_MOBILE -> MOBILE
+        else -> ""
+    }
 }

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

@@ -17,7 +17,6 @@ import com.simplemobiletools.contacts.models.PhoneNumber
 import java.io.File
 import java.io.FileOutputStream
 
-
 class VcfImporter(val activity: SimpleActivity) {
     enum class ImportResult {
         IMPORT_FAIL, IMPORT_OK, IMPORT_PARTIAL
@@ -108,8 +107,8 @@ class VcfImporter(val activity: SimpleActivity) {
 
     private fun getPhoneNumberTypeId(type: String, subType: String) = when (type) {
         CELL -> CommonDataKinds.Phone.TYPE_MOBILE
-        WORK -> CommonDataKinds.Phone.TYPE_WORK
         HOME -> CommonDataKinds.Phone.TYPE_HOME
+        WORK -> CommonDataKinds.Phone.TYPE_WORK
         PREF, MAIN -> CommonDataKinds.Phone.TYPE_MAIN
         WORK_FAX -> CommonDataKinds.Phone.TYPE_FAX_WORK
         HOME_FAX -> CommonDataKinds.Phone.TYPE_FAX_HOME