Fix more detekt and lint issues and remove them from the baseline.

core/subsonic-api-image-loader/src/main/kotlin/org/moire/ultrasonic/subsonic/loader/image/AvatarRequestHandler.kt

@@ -26,10 +26,10 @@ class AvatarRequestHandler(
             ?: throw IllegalArgumentException("Nullable username")
 
         val response = apiClient.getAvatar(username)
-        if (response.hasError()) {
+        if (response.hasError() || response.stream == null) {
             throw IOException("${response.apiError}")
         } else {
-            return Result(Okio.source(response.stream), Picasso.LoadedFrom.NETWORK)
+            return Result(Okio.source(response.stream!!), Picasso.LoadedFrom.NETWORK)
         }
     }
 }

core/subsonic-api-image-loader/src/main/kotlin/org/moire/ultrasonic/subsonic/loader/image/CoverArtRequestHandler.kt

@@ -24,10 +24,10 @@ class CoverArtRequestHandler(private val apiClient: SubsonicAPIClient) : Request
             ?: throw IllegalArgumentException("Nullable id")
 
         val response = apiClient.getCoverArt(id)
-        if (response.hasError()) {
+        if (response.hasError() || response.stream == null) {
             throw IOException("${response.apiError}")
         } else {
-            return Result(Okio.source(response.stream), NETWORK)
+            return Result(Okio.source(response.stream!!), NETWORK)
         }
     }
 }

detekt-baseline.xml

@@ -67,18 +67,10 @@
     <ID>NestedBlockDepth:DownloadFile.kt$DownloadFile.DownloadTask$override fun execute()</ID>
     <ID>NestedBlockDepth:DownloadHandler.kt$DownloadHandler$private fun downloadRecursively( fragment: Fragment, id: String, name: String?, isShare: Boolean, isDirectory: Boolean, save: Boolean, append: Boolean, autoPlay: Boolean, shuffle: Boolean, background: Boolean, playNext: Boolean, unpin: Boolean, isArtist: Boolean )</ID>
     <ID>NestedBlockDepth:MediaPlayerService.kt$MediaPlayerService$private fun setupOnSongCompletedHandler()</ID>
-    <ID>ReturnCount:ActiveServerProvider.kt$ActiveServerProvider$ fun getActiveServer(): ServerSetting</ID>
     <ID>ReturnCount:CommunicationErrorHandler.kt$CommunicationErrorHandler.Companion$fun getErrorMessage(error: Throwable, context: Context): String</ID>
-    <ID>ReturnCount:FileLoggerTree.kt$FileLoggerTree$ private fun getNextLogFile()</ID>
-    <ID>ReturnCount:MediaPlayerService.kt$MediaPlayerService$private fun generateAction(context: Context, requestCode: Int): NotificationCompat.Action?</ID>
-    <ID>ReturnCount:RESTMusicService.kt$RESTMusicService$@Throws(Exception::class) override fun getAvatar( username: String?, size: Int, saveToFile: Boolean, highQuality: Boolean ): Bitmap?</ID>
     <ID>ReturnCount:RESTMusicService.kt$RESTMusicService$@Throws(Exception::class) override fun getCoverArt( entry: MusicDirectory.Entry?, size: Int, saveToFile: Boolean, highQuality: Boolean ): Bitmap?</ID>
     <ID>ReturnCount:ServerRowAdapter.kt$ServerRowAdapter$ private fun popupMenuItemClick(menuItem: MenuItem, position: Int): Boolean</ID>
     <ID>ReturnCount:TrackCollectionFragment.kt$TrackCollectionFragment$override fun onContextItemSelected(menuItem: MenuItem): Boolean</ID>
-    <ID>ReturnCount:TrackCollectionFragment.kt$TrackCollectionFragment$override fun onOptionsItemSelected(item: MenuItem): Boolean</ID>
-    <ID>SwallowedException:LocalMediaPlayer.kt$LocalMediaPlayer$catch (e: Throwable) { // Froyo or lower }</ID>
-    <ID>SwallowedException:LocalMediaPlayer.kt$LocalMediaPlayer$catch (e: Throwable) { }</ID>
-    <ID>SwallowedException:MediaPlayerService.kt$MediaPlayerService$catch (x: IndexOutOfBoundsException) { // Ignored }</ID>
     <ID>SwallowedException:NavigationActivity.kt$NavigationActivity$catch (e: Resources.NotFoundException) { destination.id.toString() }</ID>
     <ID>ThrowsCount:ApiCallResponseChecker.kt$ApiCallResponseChecker.Companion$@Throws(SubsonicRESTException::class, IOException::class) fun checkResponseSuccessful(response: Response&lt;out SubsonicResponse&gt;)</ID>
     <ID>TooGenericExceptionCaught:DownloadFile.kt$DownloadFile$e: Exception</ID>
@@ -89,7 +81,6 @@
     <ID>TooGenericExceptionCaught:LocalMediaPlayer.kt$LocalMediaPlayer$x: Exception</ID>
     <ID>TooGenericExceptionCaught:LocalMediaPlayer.kt$LocalMediaPlayer.PositionCache$e: Exception</ID>
     <ID>TooGenericExceptionCaught:MediaPlayerService.kt$MediaPlayerService$e: Exception</ID>
-    <ID>TooGenericExceptionCaught:MediaPlayerService.kt$MediaPlayerService$x: IndexOutOfBoundsException</ID>
     <ID>TooGenericExceptionCaught:SongView.kt$SongView$e: Exception</ID>
     <ID>TooGenericExceptionCaught:SubsonicUncaughtExceptionHandler.kt$SubsonicUncaughtExceptionHandler$x: Throwable</ID>
     <ID>TooGenericExceptionCaught:VideoPlayer.kt$VideoPlayer$e: Exception</ID>
@@ -98,7 +89,6 @@
     <ID>TooManyFunctions:MediaPlayerService.kt$MediaPlayerService : Service</ID>
     <ID>TooManyFunctions:RESTMusicService.kt$RESTMusicService : MusicService</ID>
     <ID>TooManyFunctions:TrackCollectionFragment.kt$TrackCollectionFragment : Fragment</ID>
-    <ID>UnusedPrivateMember:RESTMusicService.kt$RESTMusicService.Companion$private const val INDEXES_FOLDER_STORAGE_NAME = "indexes_folder"</ID>
     <ID>UtilityClassWithPublicConstructor:CommunicationErrorHandler.kt$CommunicationErrorHandler</ID>
     <ID>UtilityClassWithPublicConstructor:FragmentTitle.kt$FragmentTitle</ID>
   </CurrentIssues>

ultrasonic/lint-baseline.xml

@@ -23,72 +23,6 @@
             column="55"/>
     </issue>
 
-    <issue
-        id="DefaultLocale"
-        message="Implicitly using the default locale is a common source of bugs: Use `toLowerCase(Locale)` instead. For strings meant to be internal use `Locale.ROOT`, otherwise `Locale.getDefault()`."
-        errorLine1="   String lhs = lhsArtist.getName().toLowerCase();"
-        errorLine2="                                    ~~~~~~~~~~~">
-        <location
-            file="src/main/java/org/moire/ultrasonic/service/OfflineMusicService.java"
-            line="97"
-            column="37"/>
-    </issue>
-
-    <issue
-        id="DefaultLocale"
-        message="Implicitly using the default locale is a common source of bugs: Use `toLowerCase(Locale)` instead. For strings meant to be internal use `Locale.ROOT`, otherwise `Locale.getDefault()`."
-        errorLine1="   String rhs = rhsArtist.getName().toLowerCase();"
-        errorLine2="                                    ~~~~~~~~~~~">
-        <location
-            file="src/main/java/org/moire/ultrasonic/service/OfflineMusicService.java"
-            line="98"
-            column="37"/>
-    </issue>
-
-    <issue
-        id="DefaultLocale"
-        message="Implicitly using the default locale is a common source of bugs: Use `toLowerCase(Locale)` instead. For strings meant to be internal use `Locale.ROOT`, otherwise `Locale.getDefault()`."
-        errorLine1="    int index = lhs.indexOf(String.format(&quot;%s &quot;, article.toLowerCase()));"
-        errorLine2="                                                         ~~~~~~~~~~~">
-        <location
-            file="src/main/java/org/moire/ultrasonic/service/OfflineMusicService.java"
-            line="115"
-            column="58"/>
-    </issue>
-
-    <issue
-        id="DefaultLocale"
-        message="Implicitly using the default locale is a common source of bugs: Use `toLowerCase(Locale)` instead. For strings meant to be internal use `Locale.ROOT`, otherwise `Locale.getDefault()`."
-        errorLine1="    index = rhs.indexOf(String.format(&quot;%s &quot;, article.toLowerCase()));"
-        errorLine2="                                                     ~~~~~~~~~~~">
-        <location
-            file="src/main/java/org/moire/ultrasonic/service/OfflineMusicService.java"
-            line="122"
-            column="54"/>
-    </issue>
-
-    <issue
-        id="DefaultLocale"
-        message="Implicitly using the default locale is a common source of bugs: Use `toLowerCase(Locale)` instead. For strings meant to be internal use `Locale.ROOT`, otherwise `Locale.getDefault()`."
-        errorLine1="  String query = criteria.getQuery().toLowerCase();"
-        errorLine2="                                     ~~~~~~~~~~~">
-        <location
-            file="src/main/java/org/moire/ultrasonic/service/OfflineMusicService.java"
-            line="466"
-            column="38"/>
-    </issue>
-
-    <issue
-        id="DefaultLocale"
-        message="Implicitly using the default locale is a common source of bugs: Use `toLowerCase(Locale)` instead. For strings meant to be internal use `Locale.ROOT`, otherwise `Locale.getDefault()`."
-        errorLine1="  String[] nameParts = COMPILE.split(name.toLowerCase());"
-        errorLine2="                                          ~~~~~~~~~~~">
-        <location
-            file="src/main/java/org/moire/ultrasonic/service/OfflineMusicService.java"
-            line="468"
-            column="43"/>
-    </issue>
-
     <issue
         id="InlinedApi"
         message="Field requires API level 16 (current min is 14): `android.Manifest.permission#READ_EXTERNAL_STORAGE`"
@@ -484,17 +418,6 @@
             column="5"/>
     </issue>
 
-    <issue
-        id="TrulyRandom"
-        message="Potentially insecure random numbers on Android 4.3 and older. Read https://android-developers.blogspot.com/2013/08/some-securerandom-thoughts.html for more info."
-        errorLine1="  Random random = new java.security.SecureRandom();"
-        errorLine2="                                    ~~~~~~~~~~~~">
-        <location
-            file="src/main/java/org/moire/ultrasonic/service/OfflineMusicService.java"
-            line="633"
-            column="37"/>
-    </issue>
-
     <issue
         id="AllowAllHostnameVerifier"
         message="Using the `AllowAllHostnameVerifier` HostnameVerifier is unsafe because it always returns true, which could cause insecure network traffic due to trusting TLS/SSL server certificates for wrong hostnames"

ultrasonic/src/main/kotlin/org/moire/ultrasonic/activity/NavigationActivity.kt

@@ -124,7 +124,7 @@ class NavigationActivity : AppCompatActivity() {
         navController.addOnDestinationChangedListener { _, destination, _ ->
             val dest: String = try {
                 resources.getResourceName(destination.id)
-            } catch (e: Resources.NotFoundException) {
+            } catch (ignored: Resources.NotFoundException) {
                 destination.id.toString()
             }
             Timber.d("Navigated to $dest")

ultrasonic/src/main/kotlin/org/moire/ultrasonic/fragment/TrackCollectionFragment.kt

@@ -28,7 +28,6 @@ import androidx.lifecycle.Observer
 import androidx.lifecycle.viewModelScope
 import androidx.navigation.Navigation
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
-import java.security.SecureRandom
 import java.util.Collections
 import java.util.Random
 import kotlinx.coroutines.CoroutineExceptionHandler
@@ -92,7 +91,7 @@ class TrackCollectionFragment : Fragment() {
     private var cancellationToken: CancellationToken? = null
 
     private val model: TrackCollectionModel by viewModels()
-    private val random: Random = SecureRandom()
+    private val random: Random = Random()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         Util.applyTheme(this.context)

ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/LocalMediaPlayer.kt

@@ -106,7 +106,7 @@ class LocalMediaPlayer(
                 i.putExtra(AudioEffect.EXTRA_AUDIO_SESSION, mediaPlayer.audioSessionId)
                 i.putExtra(AudioEffect.EXTRA_PACKAGE_NAME, context.packageName)
                 context.sendBroadcast(i)
-            } catch (e: Throwable) {
+            } catch (ignored: Throwable) {
                 // Froyo or lower
             }
             mediaPlayerLooper = Looper.myLooper()
@@ -466,7 +466,7 @@ class LocalMediaPlayer(
             // the equalizer or visualizer with the player
             try {
                 nextMediaPlayer!!.audioSessionId = mediaPlayer.audioSessionId
-            } catch (e: Throwable) {
+            } catch (ignored: Throwable) {
             }
 
             nextMediaPlayer!!.setDataSource(file.path)

ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/MediaPlayerService.kt

@@ -24,7 +24,6 @@ import android.view.KeyEvent
 import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import org.koin.android.ext.android.inject
-import org.koin.core.component.KoinApiExtension
 import org.moire.ultrasonic.R
 import org.moire.ultrasonic.activity.NavigationActivity
 import org.moire.ultrasonic.app.UApp
@@ -49,7 +48,6 @@ import timber.log.Timber
  * Android Foreground Service for playing music
  * while the rest of the Ultrasonic App is in the background.
  */
-@KoinApiExtension
 @Suppress("LargeClass")
 class MediaPlayerService : Service() {
     private val binder: IBinder = SimpleServiceBinder(this)
@@ -173,8 +171,7 @@ class MediaPlayerService : Service() {
     fun setCurrentPlaying(currentPlayingIndex: Int) {
         try {
             localMediaPlayer.setCurrentPlaying(downloader.downloadList[currentPlayingIndex])
-        } catch (x: IndexOutOfBoundsException) {
+        } catch (ignored: IndexOutOfBoundsException) {
-            // Ignored
         }
     }
 

ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/OfflineMusicService.kt

@@ -15,7 +15,6 @@ import java.io.FileReader
 import java.io.FileWriter
 import java.io.InputStream
 import java.io.Reader
-import java.security.SecureRandom
 import java.util.ArrayList
 import java.util.HashSet
 import java.util.LinkedList
@@ -45,7 +44,6 @@ import org.moire.ultrasonic.util.FileUtil
 import org.moire.ultrasonic.util.Util
 import timber.log.Timber
 
-
 // TODO: There are quite a number of deeply nested and complicated functions in this class..
 // Simplify them :)
 @Suppress("TooManyFunctions")
@@ -290,7 +288,7 @@ class OfflineMusicService : MusicService {
         if (children.isEmpty()) {
             return result
         }
-        val random: Random = SecureRandom()
+        val random = Random()
         for (i in 0 until size) {
             val file = children[random.nextInt(children.size)]
             result.addChild(createEntry(file, getName(file)))

ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/RESTMusicService.kt

@@ -53,6 +53,7 @@ import timber.log.Timber
 /**
  * This Music Service implementation connects to a server using the Subsonic REST API
  */
+@Suppress("LargeClass")
 open class RESTMusicService(
     private val subsonicAPIClient: SubsonicAPIClient,
     private val fileStorage: PermanentFileStorage,
@@ -868,7 +869,6 @@ open class RESTMusicService(
     companion object {
         private const val MUSIC_FOLDER_STORAGE_NAME = "music_folder"
         private const val INDEXES_STORAGE_NAME = "indexes"
-        private const val INDEXES_FOLDER_STORAGE_NAME = "indexes_folder"
         private const val ARTISTS_STORAGE_NAME = "artists"
     }
 }