Add option to ignore audio focus

app/src/main/java/org/y20k/transistor/Keys.kt

@@ -71,6 +71,8 @@ object Keys {
     const val CMD_CANCEL_SLEEP_TIMER: String = "CANCEL_SLEEP_TIMER"
     const val CMD_PLAY_STREAM: String = "PLAY_STREAM"
 
+    const val CMD_UPDATE_AUDIO_FOCUS_SETTING: String = "UPDATE_AUDIO_FOCUS_SETTING"
+
     // preferences
     const val PREF_RADIO_BROWSER_API: String = "RADIO_BROWSER_API"
     const val PREF_ONE_TIME_HOUSEKEEPING_NECESSARY: String = "ONE_TIME_HOUSEKEEPING_NECESSARY_VERSIONCODE_72" // increment to current app version code to trigger housekeeping that runs only once
@@ -92,6 +94,7 @@ object Keys {
     const val PREF_EDIT_STATIONS: String = "EDIT_STATIONS"
     const val PREF_EDIT_STREAMS_URIS: String = "EDIT_STREAMS_URIS"
 
+    const val PREF_HANDLE_AUDIO_FOCUS: String = "PREF_HANDLE_AUDIO_FOCUS"
 
     // states
     const val STATE_SLEEP_TIMER_STOPPED: Int = 0

app/src/main/java/org/y20k/transistor/MainActivity.kt

@@ -16,6 +16,7 @@ package org.y20k.transistor
 
 import android.content.SharedPreferences
 import android.os.Bundle
+import android.support.v4.media.session.MediaControllerCompat
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
 import androidx.navigation.fragment.NavHostFragment
@@ -96,6 +97,9 @@ class MainActivity: AppCompatActivity() {
             Keys.PREF_THEME_SELECTION -> {
                 AppThemeHelper.setTheme(PreferencesHelper.loadThemeSelection())
             }
+            Keys.PREF_HANDLE_AUDIO_FOCUS -> {
+                MediaControllerCompat.getMediaController(this).sendCommand(Keys.CMD_UPDATE_AUDIO_FOCUS_SETTING, null, null)
+            }
         }
     }
     /*

app/src/main/java/org/y20k/transistor/SettingsFragment.kt

@@ -85,6 +85,14 @@ class SettingsFragment: PreferenceFragmentCompat(), YesNoDialog.YesNoDialogListe
             }
         }
 
+        // set up "Handle Audio Focus" preference
+        val preferenceHandleAudioFocus: CheckBoxPreference = CheckBoxPreference(activity as Context)
+        preferenceHandleAudioFocus.title = getString(R.string.pref_handle_audio_focus_title)
+        preferenceHandleAudioFocus.key = Keys.PREF_HANDLE_AUDIO_FOCUS
+        preferenceHandleAudioFocus.summary = getString(R.string.pref_handle_audio_focus_summary)
+        preferenceHandleAudioFocus.setDefaultValue(true)
+
+
         // set up "Update Station Images" preference
         val preferenceUpdateStationImages: Preference = Preference(activity as Context)
         preferenceUpdateStationImages.title = getString(R.string.pref_update_station_images_title)
@@ -209,6 +217,7 @@ class SettingsFragment: PreferenceFragmentCompat(), YesNoDialog.YesNoDialogListe
         val preferenceCategoryGeneral: PreferenceCategory = PreferenceCategory(activity as Context)
         preferenceCategoryGeneral.title = getString(R.string.pref_general_title)
         preferenceCategoryGeneral.contains(preferenceThemeSelection)
+        preferenceCategoryGeneral.contains(preferenceHandleAudioFocus)
 
         val preferenceCategoryMaintenance: PreferenceCategory = PreferenceCategory(activity as Context)
         preferenceCategoryMaintenance.title = getString(R.string.pref_maintenance_title)
@@ -232,6 +241,7 @@ class SettingsFragment: PreferenceFragmentCompat(), YesNoDialog.YesNoDialogListe
         // setup preference screen
         screen.addPreference(preferenceCategoryGeneral)
         screen.addPreference(preferenceThemeSelection)
+        screen.addPreference(preferenceHandleAudioFocus)
         screen.addPreference(preferenceCategoryMaintenance)
         screen.addPreference(preferenceUpdateStationImages)
 //        screen.addPreference(preferenceUpdateCollection)

app/src/main/java/org/y20k/transistor/helpers/PreferencesHelper.kt

@@ -281,4 +281,8 @@ object PreferencesHelper {
         return sharedPreferences.getBoolean(Keys.PREF_DOWNLOAD_OVER_MOBILE, Keys.DEFAULT_DOWNLOAD_OVER_MOBILE)
     }
 
+    /* Loads handling of audio focus */
+    fun loadHandleAudioFocus(): Boolean {
+        return sharedPreferences.getBoolean(Keys.PREF_HANDLE_AUDIO_FOCUS, true)
+    }
 }

app/src/main/java/org/y20k/transistor/playback/PlayerService.kt

@@ -92,6 +92,7 @@ class PlayerService(): MediaBrowserServiceCompat() {
     private lateinit var sleepTimer: CountDownTimer
     private var sleepTimerTimeRemaining: Long = 0L
     private var playbackRestartCounter: Int = 0
+    private var handleAudioFocus: Boolean = true
 
     private val attributes = AudioAttributes.Builder()
             .setContentType(C.CONTENT_TYPE_MUSIC)
@@ -127,6 +128,10 @@ class PlayerService(): MediaBrowserServiceCompat() {
         // fetch the metadata history
         metadataHistory = PreferencesHelper.loadMetadataHistory()
 
+        // fetch handle audio focus setting
+        handleAudioFocus = PreferencesHelper.loadHandleAudioFocus()
+        player.setAudioAttributes(attributes, handleAudioFocus)
+
         // create a new MediaSession
         createMediaSession()
 
@@ -740,6 +745,15 @@ class PlayerService(): MediaBrowserServiceCompat() {
                     preparePlayer(true)
                     return true
                 }
+                Keys.CMD_UPDATE_AUDIO_FOCUS_SETTING -> {
+                    if (player is SimpleExoPlayer) {
+                        handleAudioFocus = PreferencesHelper.loadHandleAudioFocus()
+                        player.setAudioAttributes(attributes, handleAudioFocus)
+                        return true
+                    } else {
+                        return false
+                    }
+                }
                 else -> {
                     return false
                 }

app/src/main/res/values-de/strings.xml

@@ -118,6 +118,8 @@
     <string name="pref_theme_selection_mode_device_default">Identisch zum Gerät</string>
     <string name="pref_theme_selection_mode_dark">Dunkler Modus</string>
     <string name="pref_general_title">Allgemein</string>
+    <string name="pref_handle_audio_focus_title">Audio Focus berücksichtigen</string>
+    <string name="pref_handle_audio_focus_summary">Wiedergabe stoppen wenn andere Anwendung Audio ausgibt oder Telefonanruf gestartet wird</string>
     <string name="pref_delete_all_title">Downloads löschen</string>
     <string name="toastmessage_error_missing_storage_permission">Erteile die Berechtigung „Speicher lesen“, um diese Datei zu öffnen.</string>
     <string name="dialog_yes_no_positive_button_update_covers">Aktualisieren</string>

app/src/main/res/values/strings.xml

@@ -87,6 +87,8 @@
     <string name="pref_edit_station_stream_summary_disabled">Editing of streaming links disabled. </string>
     <string name="pref_edit_station_stream_title">Edit Streaming Links</string>
     <string name="pref_general_title">General</string>
+    <string name="pref_handle_audio_focus_title">Handle Audio Focus</string>
+    <string name="pref_handle_audio_focus_summary">Stop playback when other app starts playback or phone call is started</string>
     <string name="pref_maintenance_title">Maintenance</string>
     <string name="pref_m3u_export_summary">Save your radio stations to an M3U playlist file that can be imported into other players.</string>
     <string name="pref_m3u_export_title">Export M3U</string>