Rewrote UpdateDownloader to Kotlin

Added auto update check (every 12 hour)
Warning message optional fix #256
Lots of bug fixes!

app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseActivity.kt

@@ -73,5 +73,4 @@ open class BaseActivity : AppCompatActivity() {
         snack.f()
         snack.show()
     }
-
-}
+}

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAboutFragment.kt

@@ -1,12 +1,14 @@
 package eu.kanade.tachiyomi.ui.setting
 
 import android.os.Bundle
+import android.support.v7.preference.SwitchPreferenceCompat
 import android.view.View
 import com.afollestad.materialdialogs.MaterialDialog
 import eu.kanade.tachiyomi.BuildConfig
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.updater.GithubUpdateChecker
 import eu.kanade.tachiyomi.data.updater.UpdateDownloader
+import eu.kanade.tachiyomi.data.updater.UpdateDownloaderAlarm
 import eu.kanade.tachiyomi.util.toast
 import rx.Subscription
 import rx.android.schedulers.AndroidSchedulers
@@ -27,6 +29,10 @@ class SettingsAboutFragment : SettingsNestedFragment() {
      */
     private var releaseSubscription: Subscription? = null
 
+    val automaticUpdateToggle by lazy {
+        findPreference(getString(R.string.pref_enable_automatic_updates_key)) as SwitchPreferenceCompat
+    }
+
     companion object {
 
         fun newInstance(resourcePreference: Int, resourceTitle: Int): SettingsNestedFragment {
@@ -45,11 +51,25 @@ class SettingsAboutFragment : SettingsNestedFragment() {
         else
             BuildConfig.VERSION_NAME
 
-        //Set onClickListener to check for new version
-        version.setOnPreferenceClickListener {
-            if (!BuildConfig.DEBUG && BuildConfig.INCLUDE_UPDATER)
-                checkVersion()
-            true
+        if (!BuildConfig.DEBUG && BuildConfig.INCLUDE_UPDATER) {
+            //Set onClickListener to check for new version
+            version.setOnPreferenceClickListener {
+                true
+            }
+
+            automaticUpdateToggle.isEnabled = true
+            automaticUpdateToggle.setOnPreferenceChangeListener { preference, any ->
+                val status = any as Boolean
+                UpdateDownloaderAlarm.startAlarm(activity, 12, status)
+                true
+            }
+
+            automaticUpdateToggle.isEnabled = true
+            automaticUpdateToggle.setOnPreferenceChangeListener { preference, any ->
+                val status = any as Boolean
+                UpdateDownloaderAlarm.startAlarm(activity, 12, status)
+                true
+            }
         }
 
         buildTime.summary = getFormattedBuildTime()

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsGeneralFragment.kt

@@ -2,6 +2,7 @@ package eu.kanade.tachiyomi.ui.setting
 
 import android.content.Intent
 import android.os.Bundle
+import android.support.v14.preference.MultiSelectListPreference
 import android.support.v4.app.TaskStackBuilder
 import android.support.v7.preference.Preference
 import android.view.View
@@ -33,13 +34,28 @@ class SettingsGeneralFragment : SettingsNestedFragment() {
         findPreference(getString(R.string.pref_library_update_interval_key)) as IntListPreference
     }
 
+    val updateRestriction by lazy {
+        findPreference(getString(R.string.pref_library_update_restriction_key)) as MultiSelectListPreference
+    }
+
     val themePreference by lazy {
         findPreference(getString(R.string.pref_theme_key)) as IntListPreference
     }
 
+    var updateIntervalSubscription: Subscription? = null
+
     var columnsSubscription: Subscription? = null
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        updateIntervalSubscription = preferences.libraryUpdateInterval().asObservable()
+                .subscribe { updateRestriction.isVisible = it > 0 }
+
+        columnsSubscription = Observable.combineLatest(
+                preferences.portraitColumns().asObservable(),
+                preferences.landscapeColumns().asObservable())
+                { portraitColumns, landscapeColumns -> Pair(portraitColumns, landscapeColumns) }
+                .subscribe { updateColumnsSummary(it.first, it.second) }
+
         updateInterval.setOnPreferenceChangeListener { preference, newValue ->
             LibraryUpdateAlarm.startAlarm(activity, (newValue as String).toInt())
             true
@@ -57,17 +73,11 @@ class SettingsGeneralFragment : SettingsNestedFragment() {
         }
     }
 
-    override fun onResume() {
-        super.onResume()
-        columnsSubscription = Observable.combineLatest(preferences.portraitColumns().asObservable(),
-                preferences.landscapeColumns().asObservable(),
-                { portraitColumns, landscapeColumns -> Pair(portraitColumns, landscapeColumns) })
-                .subscribe { updateColumnsSummary(it.first, it.second) }
-    }
-
-    override fun onPause() {
+    override fun onDestroyView() {
+        updateIntervalSubscription?.unsubscribe()
         columnsSubscription?.unsubscribe()
-        super.onPause()
+        super.onDestroyView()
+
     }
 
     override fun onDisplayPreferenceDialog(preference: Preference) {