在应用程序进入后台或刷新 callInProgressActivity 的 voip 通话期间，语音会自动从麦克风传递到扬声器。我在 AudioRecord 上收到错误状态 -38，但仅在 Google 像素手机上使用 Api 级别 27。就好像活动尝试再次使用麦克风并失败然后切换到扬声器。提前致谢！
E/AudioRecord: start() status -38
02-09 11:42:01.918 2589-10619/? I/MicrophoneInputStream: mic_close SR : 16000 CC : 16 SO : 1999
02-09 11:42:01.918 2589-9790/? I/MicroRecognitionRunner: Detection finished
02-09 11:42:01.919 2589-9790/? W/ErrorReporter: reportError [type: 211, code: 524300]: Error reading from input stream
02-09 11:42:01.919 2589-2948/? I/MicroRecognitionRunner: Stopping hotword detection.
02-09 11:42:01.919 2589-9790/? W/ErrorProcessor: onFatalError, processing error from engine(4)
com.google.android.apps.gsa.shared.speech.b.g: Error reading from input stream
at com.google.android.apps.gsa.staticplugins.recognizer.k.a.a(SourceFile:27)
at com.google.android.apps.gsa.staticplugins.recognizer.k.b.run(Unknown Source:14)
at com.google.android.libraries.gsa.runner.a.a.b(SourceFile:32)
at com.google.android.libraries.gsa.runner.a.c.call(Unknown Source:4)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at com.google.android.apps.gsa.shared.util.concurrent.a.h.run(Unknown Source:4)
at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:4)
at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:4)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)
at com.google.android.apps.gsa.shared.util.concurrent.a.l.run(SourceFile:6)
Caused by: com.google.android.apps.gsa.shared.exception.GsaIOException: Error code: 393237 | Error code: 393222 | couldn't start recording, state is:1
at com.google.android.apps.gsa.speech.audio.Tee.ru(SourceFile:165)
at com.google.android.apps.gsa.speech.audio.Tee.f(SourceFile:109)
at com.google.android.apps.gsa.speech.audio.ax.read(SourceFile:2)
at java.io.InputStream.read(InputStream.java:101)
at com.google.android.apps.gsa.speech.audio.ar.run(SourceFile:17)
at com.google.android.apps.gsa.speech.audio.aq.run(SourceFile:2)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at com.google.android.apps.gsa.shared.util.concurrent.a.h.run(Unknown Source:4)
at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:4)
at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:4)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)
at com.google.android.apps.gsa.shared.util.concurrent.a.l.run(SourceFile:6)
Caused by: com.google.android.apps.gsa.shared.exception.GsaIOException: Error code: 393222 | couldn't start recording, state is:1
at com.google.android.apps.gsa.speech.audio.al.biZ(SourceFile:48)
at com.google.android.apps.gsa.speech.audio.al.read(SourceFile:61)
at com.google.common.l.l.a(SourceFile:47)
at com.google.android.apps.gsa.speech.audio.Tee.ru(SourceFile:162)
at com.google.android.apps.gsa.speech.audio.Tee.f(SourceFile:109)
at com.google.android.apps.gsa.speech.audio.ax.read(SourceFile:2)
at java.io.InputStream.read(InputStream.java:101)
at com.google.android.apps.gsa.speech.audio.ar.run(SourceFile:17)
at com.google.android.apps.gsa.speech.audio.aq.run(SourceFile:2)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at com.google.android.apps.gsa.shared.util.concurrent.a.h.run(Unknown Source:4)
at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:4)
at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:4)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)
at com.google.android.apps.gsa.shared.util.concurrent.a.l.run(SourceFile:6)
02-09 11:42:01.919 2589-9790/? I/AudioController: internalShutdown