show a dialog about Simple Contacts under some circumstances

app/build.gradle

@@ -46,7 +46,7 @@ ext {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:3.14.6'
+    implementation 'com.simplemobiletools:commons:3.14.7'
     implementation 'com.theartofdev.edmodo:android-image-cropper:2.6.0'
     implementation 'com.android.support:multidex:1.0.3'
     implementation 'com.google.code.gson:gson:2.8.2'

app/src/main/kotlin/com/simplemobiletools/gallery/activities/MainActivity.kt

@@ -16,6 +16,7 @@ import android.widget.FrameLayout
 import com.google.gson.Gson
 import com.simplemobiletools.commons.dialogs.CreateNewFolderDialog
 import com.simplemobiletools.commons.dialogs.FilePickerDialog
+import com.simplemobiletools.commons.dialogs.NewAppDialog
 import com.simplemobiletools.commons.dialogs.RadioGroupDialog
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.PERMISSION_READ_STORAGE
@@ -44,6 +45,7 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
     private val PICK_MEDIA = 2
     private val PICK_WALLPAPER = 3
     private val LAST_MEDIA_CHECK_PERIOD = 3000L
+    private val CONTACTS_PACKAGE = "com.simplemobiletools.contacts"
 
     lateinit var mDirs: ArrayList<Directory>
 
@@ -99,6 +101,12 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
 
         mIsPasswordProtectionPending = config.appPasswordProtectionOn
         setupLatestMediaId()
+
+        // notify the users about the Contacts app
+        if (System.currentTimeMillis() < 1521015000000 && !config.wasNewAppShown && config.appRunCount > 100 && config.appRunCount % 50 != 0 && !isPackageInstalled(CONTACTS_PACKAGE)) {
+            config.wasNewAppShown = true
+            NewAppDialog(this, CONTACTS_PACKAGE, "Simple Contacts")
+        }
     }
 
     override fun onStart() {

app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Config.kt

@@ -316,4 +316,8 @@ class Config(context: Context) : BaseConfig(context) {
     var doExtraCheck: Boolean
         get() = prefs.getBoolean(DO_EXTRA_CHECK, false)
         set(doExtraCheck) = prefs.edit().putBoolean(DO_EXTRA_CHECK, doExtraCheck).apply()
+
+    var wasNewAppShown: Boolean
+        get() = prefs.getBoolean(WAS_NEW_APP_SHOWN, false)
+        set(wasNewAppShown) = prefs.edit().putBoolean(WAS_NEW_APP_SHOWN, wasNewAppShown).apply()
 }

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

@@ -46,6 +46,7 @@ const val ONE_FINGER_ZOOM = "one_finger_zoom"
 const val ALLOW_INSTANT_CHANGE = "allow_instant_change"
 const val REPLACE_ZOOMABLE_IMAGES = "replace_zoomable_images"
 const val DO_EXTRA_CHECK = "do_extra_check"
+const val WAS_NEW_APP_SHOWN = "was_new_app_shown"
 
 // slideshow
 const val SLIDESHOW_INTERVAL = "slideshow_interval"