我目前在尝试显示媒体播放的"爆炸"视图时遇到问题，使用以下库：https://github.com/gauravk95/audio-visualizer-android
我正在从事使用 Kotlin 编码的活动
我按照自述文件中的建议做了，但是当我的活动开始时遇到了问题：
E/AudioEffect: set(): AudioFlinger could not create effect e46b26a0-dddd-11db-8afd-0002a5d5c51b / `�?�v, status: -1
E/visualizers-JNI: Visualizer initCheck failed -3
E/Visualizer-JAVA: Error code -3 when initializing Visualizer.
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.codex_d.dev.android, PID: 31116
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.codex_d.dev.android/com.codex_d.dev.android.runningActivities.AudioPlayerActivity}: java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -3
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -3
at android.media.audiofx.Visualizer.<init>(Visualizer.java:221)
at com.gauravk.audiovisualizer.base.BaseVisualizer.setAudioSessionId(BaseVisualizer.java:196)
at com.codex_d.dev.android.runningActivities.AudioPlayerActivity.onCreate(AudioPlayerActivity.kt:26)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1306)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
I/Process: Sending signal. PID: 31116 SIG: 9
Process 31116 terminated.
我已经在清单中声明了RECORD_AUDIO和MODIFY_AUDIO_SETTINGS权限。
这是我的活动代码：
class AudioPlayerActivity : BaseAdventureActivity(R.layout.activity_audio_player, true) {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val dataLocation = intent.getSerializableExtra(EXTRA_LOCATION) as DataLocation
val path = "sample_audio_happy"
var mediaPlayer = MediaPlayer.create(this, dataLocation.getUri(path, this, adventure))
mediaPlayer.start()
if (mediaPlayer.audioSessionId != -1) blast.setAudioSessionId(mediaPlayer.audioSessionId)
}
override fun onDestroy() {
super.onDestroy()
blast.release()
}
当我使用 setAudioSessionId 注释该行时，一切正常(但当然没有显示可视化(。
有谁知道这个错误可能来自哪里？
确实，@Tenfour04是对的。以下是所需的两行代码：
if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, Array(1){Manifest.permission.RECORD_AUDIO}, 0)
}
只需在 stting audioSessionID 之前添加，它应该可以工作。
感谢您的帮助！