我需要在拨出电话期间打开扬声器，但它的抛出异常 以下是我使用的代码片段：
audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
audioManager.setMode(AudioManager.MODE_IN_CALL);
if (!audioManager.isSpeakerphoneOn())
audioManager.setSpeakerphoneOn(true);
audioManager.setMode(AudioManager.MODE_NORMAL);
它在 6.0 以下的设备上运行良好，但在 8.0 和 7.0 中不起作用。
日志猫：
01-22 13:38:19.887 25014-25014/com.tool.autoredialer D/AudioManager: PPD setMode mode = 2
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: dalvik.system.VMStack.getThreadStackTrace(Native Method)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: java.lang.Thread.getStackTrace(Thread.java:1536)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.media.AudioManager.setMode(AudioManager.java:1630)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.tool.autoredialer.services.CallVibratorAccessibilityService.handlVibrate(CallVibratorAccessibilityService.java:114)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.tool.autoredialer.services.CallVibratorAccessibilityService.onAccessibilityEvent(CallVibratorAccessibilityService.java:49)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.accessibilityservice.AccessibilityService$2.onAccessibilityEvent(AccessibilityService.java:1527)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.accessibilityservice.AccessibilityService$IAccessibilityServiceClientWrapper.executeMessage(AccessibilityService.java:1712)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:37)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.os.Handler.dispatchMessage(Handler.java:105)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.os.Looper.loop(Looper.java:164)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.app.ActivityThread.main(ActivityThread.java:6809)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: java.lang.reflect.Method.invoke(Native Method)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
01-22 13:38:19.888 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
01-22 13:38:19.892 25014-25014/com.tool.autoredialer I/AudioManager: setSpeakerphoneOn true java.lang.Throwable
at android.media.AudioManager.setSpeakerphoneOn(AudioManager.java:1235)
at com.tool.autoredialer.services.CallVibratorAccessibilityService.handlVibrate(CallVibratorAccessibilityService.java:116)
at com.tool.autoredialer.services.CallVibratorAccessibilityService.onAccessibilityEvent(CallVibratorAccessibilityService.java:49)
at android.accessibilityservice.AccessibilityService$2.onAccessibilityEvent(AccessibilityService.java:1527)
at android.accessibilityservice.AccessibilityService$IAccessibilityServiceClientWrapper.executeMessage(AccessibilityService.java:1712)
at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:37)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6809)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer D/AudioManager: com.tool.autoredialerdo not have using speaker authority in call
01-22 13:38:19.894 25014-25014/com.tool.autoredialer D/AudioManager: PPD setMode mode = 0
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: dalvik.system.VMStack.getThreadStackTrace(Native Method)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: java.lang.Thread.getStackTrace(Thread.java:1536)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.media.AudioManager.setMode(AudioManager.java:1630)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.tool.autoredialer.services.CallVibratorAccessibilityService.handlVibrate(CallVibratorAccessibilityService.java:117)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.tool.autoredialer.services.CallVibratorAccessibilityService.onAccessibilityEvent(CallVibratorAccessibilityService.java:49)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.accessibilityservice.AccessibilityService$2.onAccessibilityEvent(AccessibilityService.java:1527)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.accessibilityservice.AccessibilityService$IAccessibilityServiceClientWrapper.executeMessage(AccessibilityService.java:1712)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:37)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.os.Handler.dispatchMessage(Handler.java:105)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.os.Looper.loop(Looper.java:164)
01-22 13:38:19.894 25014-25014/com.tool.autoredialer V/AudioManager: Elem: android.app.ActivityThread.main(ActivityThread.java:6809)
01-22 13:38:19.895 25014-25014/com.tool.autoredialer V/AudioManager: Elem: java.lang.reflect.Method.invoke(Native Method)
01-22 13:38:19.895 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
01-22 13:38:19.895 25014-25014/com.tool.autoredialer V/AudioManager: Elem: com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
找到了答案。
您尝试在通话期间使用AudioManager，Android Systems禁止这样做。在扬声器上实现设置的方法是替换电话行为并实现呼叫服务。
然后，您可以拨打setAudioRoute(CallAudioState.ROUTE_SPEAKER)并能够处理不同的设备(例如蓝牙或有线耳机(。
您可以在此处查看 API 定义：https://developer.android.com/reference/android/telecom/InCallService#setAudioRoute(int(