* Converted AboutFragment to Kotlin (#231)

app/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
 
 android {
     compileSdkVersion 29
@@ -41,8 +42,16 @@ android {
     }
 }
 
+repositories {
+    mavenCentral()
+}
+
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
+
+    implementation "androidx.core:core-ktx:+"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+
     implementation 'androidx.exifinterface:exifinterface:1.3.0'
     testImplementation 'junit:junit:4.13'
     implementation 'androidx.appcompat:appcompat:1.2.0'

app/src/main/java/com/todobom/opennotescanner/helpers/AboutFragment.kt

@@ -0,0 +1,53 @@
+package com.todobom.opennotescanner.helpers
+
+import android.content.Intent
+import android.graphics.Point
+import android.os.Bundle
+import android.view.*
+import androidx.fragment.app.DialogFragment
+import com.todobom.opennotescanner.OpenNoteScannerApplication
+import com.todobom.opennotescanner.R
+import org.matomo.sdk.extra.TrackHelper
+import us.feras.mdv.MarkdownView
+
+class AboutFragment : DialogFragment() {
+    override fun onCreateView(
+            inflater: LayoutInflater,
+            container: ViewGroup?,
+            savedInstanceState: Bundle?
+    ): View? {
+        val aboutView = inflater.inflate(R.layout.about_view, container)
+        dialog?.window?.requestFeature(Window.FEATURE_NO_TITLE)
+        return aboutView
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        //These two in case the fragment detached
+        val activity = activity ?: return
+        val window = dialog?.window ?: return
+
+        val markdownView = view.findViewById<MarkdownView>(R.id.about_markdown)
+        markdownView.loadMarkdownFile("file:///android_asset/" + getString(R.string.about_filename))
+        val size = Point()
+        activity.windowManager.defaultDisplay.getRealSize(size)
+        window.setLayout((size.x * 0.9).toInt(), (size.y * 0.9).toInt())
+        window.setGravity(Gravity.CENTER)
+        val about_shareapp = view.findViewById<View>(R.id.about_shareapp)
+        about_shareapp.setOnClickListener {
+            val shareBody = getString(R.string.share_app_body) + APP_LINK
+            val sharingIntent = Intent(Intent.ACTION_SEND).apply {
+                type = "text/plain"
+                putExtra(Intent.EXTRA_SUBJECT, getString(R.string.share_app_subject))
+                putExtra(Intent.EXTRA_TEXT, shareBody)
+            }
+            val tracker = (activity.application as OpenNoteScannerApplication).tracker
+            TrackHelper.track().screen("/shareapp").title("Share Application").with(tracker)
+            startActivity(Intent.createChooser(sharingIntent, getString(R.string.share_app_using)))
+        }
+    }
+
+    companion object {
+        private const val APP_LINK = "https://goo.gl/2JwEPq"
+    }
+}

build.gradle

@@ -1,6 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+    ext.kotlin_version = '1.4.10'
     repositories {
         jcenter()
         maven {
@@ -11,6 +12,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files