Cleanup AudioPlayService (#281)

Separated from #280.

Author: Goooler

base/src/main/kotlin/io/goooler/demoapp/base/util/BaseExtensions.kt

@@ -531,6 +531,8 @@ fun Context.setMusicMute(mute: Boolean = true) {
   }
 }
 
+inline fun <reified T : Any> Context.requireSystemService(): T = checkNotNull(getSystemService())
+
 // ---------------------Activity-------------------------------//
 
 @MainThread

common/src/main/kotlin/io/goooler/demoapp/common/service/AudioPlayService.kt

@@ -6,23 +6,18 @@ import android.media.AudioAttributes
 import android.media.AudioManager
 import android.media.MediaPlayer
 import android.os.Build
-import androidx.core.content.getSystemService
 import io.goooler.demoapp.base.core.BaseService
+import io.goooler.demoapp.base.util.requireSystemService
 import io.goooler.demoapp.base.util.unsafeLazy
 
 class AudioPlayService : BaseService() {
 
   private val mediaPlayer = MediaPlayer()
   private var lastStreamUrl = ""
-  private var audioManager: AudioManager? = null
+  private val audioManager: AudioManager by unsafeLazy { requireSystemService() }
 
   override val contentTitle: String get() = "正在播放音频"
 
-  override fun onCreate() {
-    super.onCreate()
-    audioManager = getSystemService()
-  }
-
   override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
     when (intent?.action) {
       PAUSE -> pausePlay()
@@ -69,20 +64,21 @@ class AudioPlayService : BaseService() {
 
   private fun stopPlay() {
     abandonAudioFocus()
-    audioManager = null
     mediaPlayer.stop()
   }
 
   private fun requestAudioFocus() {
-    audioManager?.requestAudioFocus(
+    @Suppress("DEPRECATION")
+    audioManager.requestAudioFocus(
       audioFocusChangeListener,
       AudioManager.STREAM_MUSIC,
       AudioManager.AUDIOFOCUS_GAIN,
     )
   }
 
   private fun abandonAudioFocus() {
-    audioManager?.abandonAudioFocus(audioFocusChangeListener)
+    @Suppress("DEPRECATION")
+    audioManager.abandonAudioFocus(audioFocusChangeListener)
   }
 
   private val audioFocusChangeListener by unsafeLazy {