Fix #517 and a few more crashes

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt

@@ -5,7 +5,6 @@ import android.app.Service
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.os.IBinder
 import android.os.PowerManager
@@ -73,7 +72,9 @@ class LibraryUpdateService : Service() {
     private val notificationId: Int
         get() = Constants.NOTIFICATION_LIBRARY_ID
 
-    private var notificationBitmap: Bitmap? = null
+    private val notificationBitmap by lazy {
+        BitmapFactory.decodeResource(resources, R.mipmap.ic_launcher)
+    }
 
     companion object {
 
@@ -141,8 +142,6 @@ class LibraryUpdateService : Service() {
      */
     override fun onDestroy() {
         subscription?.unsubscribe()
-        notificationBitmap?.recycle()
-        notificationBitmap = null
         destroyWakeLock()
         super.onDestroy()
     }
@@ -171,10 +170,6 @@ class LibraryUpdateService : Service() {
         // Update favorite manga. Destroy service when completed or in case of an error.
         subscription = Observable
                 .defer {
-                    if (notificationBitmap == null) {
-                        notificationBitmap = BitmapFactory.decodeResource(resources, R.mipmap.ic_launcher)
-                    }
-
                     val mangaList = getMangaToUpdate(intent)
 
                     // Update either chapter list or manga details.
@@ -267,7 +262,6 @@ class LibraryUpdateService : Service() {
                     } else {
                         showResultNotification(newUpdates, failedUpdates)
                     }
-                    LibraryUpdateJob.setupTask()
                 }
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/main/ChangelogDialogFragment.kt

@@ -9,6 +9,7 @@ import android.util.AttributeSet
 import com.afollestad.materialdialogs.MaterialDialog
 import eu.kanade.tachiyomi.BuildConfig
 import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.library.LibraryUpdateJob
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.data.updater.UpdateCheckerJob
@@ -23,9 +24,10 @@ class ChangelogDialogFragment : DialogFragment() {
                 preferences.lastVersionCode().set(BuildConfig.VERSION_CODE)
                 ChangelogDialogFragment().show(fragmentManager, "changelog")
 
-                // FIXME Ugly check to restore auto updates setting. Remove me in a few months :D
+                // FIXME Ugly check to restore jobs. Remove me in a few months :D
                 if (oldVersion < 14 && BuildConfig.INCLUDE_UPDATER && preferences.automaticUpdates()) {
                     UpdateCheckerJob.setupTask()
+                    LibraryUpdateJob.setupTask()
                 }
             }
         }

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

@@ -71,7 +71,7 @@ class SettingsAdvancedFragment : SettingsFragment() {
     private fun clearChapterCache() {
         val deletedFiles = AtomicInteger()
 
-        val files = chapterCache.cacheDir.listFiles()
+        val files = chapterCache.cacheDir.listFiles() ?: return
 
         val dialog = MaterialDialog.Builder(activity)
                 .title(R.string.deleting)