Add vCard attachment preview

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Activity.kt

@@ -24,3 +24,19 @@ fun Activity.dialNumber(phoneNumber: String, callback: (() -> Unit)? = null) {
         }
     }
 }
+
+fun Activity.sendMail(email: String) {
+    hideKeyboard()
+    Intent(Intent.ACTION_SENDTO).apply {
+        data = Uri.parse("mailto:")
+        putExtra(Intent.EXTRA_EMAIL, email)
+
+        try {
+            startActivity(this)
+        } catch (e: ActivityNotFoundException) {
+            toast(R.string.no_app_found)
+        } catch (e: Exception) {
+            showErrorToast(e)
+        }
+    }
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Date.kt

@@ -0,0 +1,8 @@
+package com.simplemobiletools.smsmessenger.extensions
+
+import android.text.format.DateFormat
+import java.util.*
+
+fun Date.format(pattern: String): String {
+    return DateFormat.format(pattern, this).toString()
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/String.kt

@@ -14,3 +14,8 @@ fun String.getExtensionFromMimeType(): String {
 fun String.isImageMimeType(): Boolean {
     return lowercase().startsWith("image")
 }
+
+fun String.isVCardMimeType(): Boolean {
+    val lowercase = lowercase()
+    return lowercase.endsWith("x-vcard") || lowercase.endsWith("vcard")
+}