是否可以通过 Android 模拟器录制音频？

Question

我正在从事一个医疗项目，该应用程序可以记录医生和患者之间的对话并将其发送给转录。

作业：基本上应用程序用于录制和播放录制的音频。
问题：当开始录制时，它会在 LogCat 显示后 10-20 秒进行录制：

05-07 11:42:52.502: W/MediaProfiles(6321): could not find media config xml file
05-07 11:42:52.522: I/MPEG4Writer(6321): limits: 2147483647/0 bytes/us, bit rate: 12200 bps and the estimated moov size 3072 bytes
05-07 11:42:52.532: E/AudioFlinger(6321): Error reading audio input
05-07 11:42:58.432: W/AudioRecord(6321): obtainBuffer timed out (is the CPU pegged?) user=00000000, server=00000000
05-07 11:42:58.432: E/AudioFlinger(6321): Error reading audio input
05-07 11:43:03.403: W/AudioRecord(6321): obtainBuffer timed out (is the CPU pegged?) user=00000000, server=00000000
05-07 11:43:03.403: E/AudioFlinger(6321): Error reading audio input
05-07 11:43:03.403: A/AudioSource(6321): frameworks/base/media/libstagefright/AudioSource.cpp:327 timestampUs > mPrevSampleTimeUs
05-07 11:43:03.612: I/DEBUG(31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
05-07 11:43:03.612: I/DEBUG(31): Build fingerprint: 'generic/sdk/generic:2.3.3/GRI34/101070:eng/test-keys'
05-07 11:43:03.612: I/DEBUG(31): pid: 6321, tid: 6442  >>> /system/bin/mediaserver <<<
05-07 11:43:03.612: I/DEBUG(31): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr deadbaad
05-07 11:43:03.622: I/DEBUG(31):  r0 deadbaad  r1 0000fef8  r2 00000027  r3 00000000
05-07 11:43:03.632: I/DEBUG(31):  r4 00000080  r5 afd46668  r6 40806d78  r7 40806d7c
05-07 11:43:03.632: I/DEBUG(31):  r8 a2f51fa1  r9 0000fd28  10 00100000  fp 00000001
05-07 11:43:03.632: I/DEBUG(31):  ip ffffffff  sp 408068e0  lr afd19d8f  pc afd15ef0  cpsr 00000030
05-07 11:43:03.922: I/DEBUG(31):          #00  pc 00015ef0  /system/lib/libc.so
05-07 11:43:03.922: I/DEBUG(31):          #01  pc 00001440  /system/lib/liblog.so
05-07 11:43:03.922: I/DEBUG(31): code around pc:
05-07 11:43:03.932: I/DEBUG(31): afd15ed0 68241c23 d1fb2c00 68dae027 d0042a00 
05-07 11:43:03.932: I/DEBUG(31): afd15ee0 20014d18 6028447d 48174790 24802227 
05-07 11:43:03.932: I/DEBUG(31): afd15ef0 f7f57002 2106eb56 ec92f7f6 0563aa01 
05-07 11:43:03.932: I/DEBUG(31): afd15f00 60932100 91016051 1c112006 e818f7f6 
05-07 11:43:03.932: I/DEBUG(31): afd15f10 2200a905 f7f62002 f7f5e824 2106eb42 
05-07 11:43:03.942: I/DEBUG(31): code around lr:
05-07 11:43:03.942: I/DEBUG(31): afd19d6c 230ed505 21005ec0 f7f12202 89a2ebec 
05-07 11:43:03.942: I/DEBUG(31): afd19d7c 1c294804 81a04010 5ea0220e f7f11c32 
05-07 11:43:03.942: I/DEBUG(31): afd19d8c bd70eb72 ffffefff 1c04b510 5ec0230e 
05-07 11:43:03.942: I/DEBUG(31): afd19d9c eb58f7f1 db032800 180b6d21 e0036523 
05-07 11:43:03.952: I/DEBUG(31): afd19dac 4b0289a2 81a34013 46c0bd10 ffffefff 
05-07 11:43:03.952: I/DEBUG(31): stack:
05-07 11:43:03.952: I/DEBUG(31):     408068a0  00000008  
05-07 11:43:03.952: I/DEBUG(31):     408068a4  afd18407  /system/lib/libc.so
05-07 11:43:03.952: I/DEBUG(31):     408068a8  afd42604  /system/lib/libc.so
05-07 11:43:03.952: I/DEBUG(31):     408068ac  afd46784  
05-07 11:43:03.952: I/DEBUG(31):     408068b0  00000000  
05-07 11:43:03.952: I/DEBUG(31):     408068b4  afd19375  /system/lib/libc.so
05-07 11:43:03.952: I/DEBUG(31):     408068b8  00000009  
05-07 11:43:03.963: I/DEBUG(31):     408068bc  afd183d9  /system/lib/libc.so
05-07 11:43:03.963: I/DEBUG(31):     408068c0  afa01199  /system/lib/liblog.so
05-07 11:43:03.963: I/DEBUG(31):     408068c4  00000000  
05-07 11:43:03.963: I/DEBUG(31):     408068c8  afd46668  
05-07 11:43:03.963: I/DEBUG(31):     408068cc  40806d78  
05-07 11:43:03.963: I/DEBUG(31):     408068d0  40806d7c  
05-07 11:43:03.963: I/DEBUG(31):     408068d4  afd18677  /system/lib/libc.so
05-07 11:43:03.963: I/DEBUG(31):     408068d8  df002777  
05-07 11:43:03.963: I/DEBUG(31):     408068dc  e3a070ad  
05-07 11:43:03.963: I/DEBUG(31): #00 408068e0  408068dc  
05-07 11:43:03.963: I/DEBUG(31):     408068e4  00000001  
05-07 11:43:03.972: I/DEBUG(31):     408068e8  a303abbe  /system/lib/libstagefright.so
05-07 11:43:03.972: I/DEBUG(31):     408068ec  0000000c  
05-07 11:43:03.972: I/DEBUG(31):     408068f0  40806914  
05-07 11:43:03.972: I/DEBUG(31):     408068f4  fffffbdf  
05-07 11:43:03.972: I/DEBUG(31):     408068f8  00000001  
05-07 11:43:03.972: I/DEBUG(31):     408068fc  40806914  
05-07 11:43:03.972: I/DEBUG(31):     40806900  a303abbe  /system/lib/libstagefright.so
05-07 11:43:03.972: I/DEBUG(31):     40806904  afa01443  /system/lib/liblog.so
05-07 11:43:03.983: I/DEBUG(31): #01 40806908  40806914  
05-07 11:43:03.983: I/DEBUG(31):     4080690c  afa01443  /system/lib/liblog.so
05-07 11:43:03.983: I/DEBUG(31):     40806910  40806d2c  
05-07 11:43:03.983: I/DEBUG(31):     40806914  6d617266  
05-07 11:43:03.983: I/DEBUG(31):     40806918  726f7765  
05-07 11:43:03.983: I/DEBUG(31):     4080691c  622f736b  
05-07 11:43:03.983: I/DEBUG(31):     40806920  2f657361  
05-07 11:43:03.983: I/DEBUG(31):     40806924  6964656d  
05-07 11:43:03.983: I/DEBUG(31):     40806928  696c2f61  
05-07 11:43:03.983: I/DEBUG(31):     4080692c  61747362  
05-07 11:43:03.983: I/DEBUG(31):     40806930  72666567  
05-07 11:43:03.983: I/DEBUG(31):     40806934  74686769  
05-07 11:43:03.992: I/DEBUG(31):     40806938  6475412f  
05-07 11:43:03.992: I/DEBUG(31):     4080693c  6f536f69  
05-07 11:43:03.992: I/DEBUG(31):     40806940  65637275  
05-07 11:43:03.992: I/DEBUG(31):     40806944  7070632e  
05-07 11:43:03.992: I/DEBUG(31):     40806948  3732333a  
05-07 11:43:03.992: I/DEBUG(31):     4080694c  6d697420  
05-07 11:43:05.342: I/BootReceiver(61): Copying /data/tombstones/tombstone_03 to DropBox (SYSTEM_TOMBSTONE)
05-07 11:43:05.372: W/IMediaDeathNotifier(386): media server died
05-07 11:43:05.372: I/ServiceManager(28): service 'media.audio_flinger' died
05-07 11:43:05.372: I/ServiceManager(28): service 'media.audio_policy' died
05-07 11:43:05.372: I/ServiceManager(28): service 'media.player' died
05-07 11:43:05.372: I/ServiceManager(28): service 'media.camera' died
05-07 11:43:05.382: W/AudioSystem(61): AudioFlinger server died!
05-07 11:43:05.382: W/AudioSystem(61): AudioPolicyService server died!
05-07 11:43:05.632: D/dalvikvm(61): GC_CONCURRENT freed 1046K, 47% free 4504K/8391K, external 3520K/3903K, paused 8ms+19ms
05-07 11:43:06.072: I/(6479): ServiceManager: 0xad50
05-07 11:43:06.072: D/AudioHardwareInterface(6479): setMode(NORMAL)
05-07 11:43:06.072: I/CameraService(6479): CameraService started (pid=6479)
05-07 11:43:06.082: I/AudioFlinger(6479): AudioFlinger's thread 0xc658 ready to run
05-07 11:43:06.908: E/AudioService(61): Media server died.
05-07 11:43:06.912: E/AudioService(61): Media server started.
05-07 11:43:06.922: D/AudioHardwareInterface(6479): setMode(NORMAL)
05-07 11:43:06.922: W/AudioPolicyManagerBase(6479): setPhoneState() setting same state 0

代码：

protected String doInBackground(MediaRecorder... params) {
            mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();
            mFileName += "/_audioDirectory/" time +"/"+f_Name+ ".mp3";
            mRecorder = new MediaRecorder();
            mRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
            mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
            mRecorder.setOutputFile(mFileName);

            try {
                mRecorder.prepare();
            } catch (Exception e) {
                Log.e(LOG_TAG, e.toString());
            }
            mRecorder.start();
            Log.i("recording starts", "now");
            return "success";
        }

我浏览了Android 文档，它清楚地提到 MediaRecorder 在模拟器上不起作用。现在我没有要测试的 android 手机。

还有： 这里这里这里

Answer 1

是的，您可以，只需启用“虚拟麦克风使用主机音频输入”即可。 此外，应用程序应该请求许可，您应该允许它使用您的音频。

如何启用 Android 模拟器音频的图片

为确保问题不是您的应用程序，您可以在模拟器中访问谷歌浏览器并使用此网络应用程序 -> https://online-voice-recorder.com/以确保录音正常工作。

Answer 2

不可以。不能使用模拟器来录制声音。 您必须编写程序的逻辑代码，然后将实际的 apk 部署到您的手机上，以测试其功能。

检查此链接作为官方参考： http : //developer.android.com/intl/es/guide/topics/media/audio-capture.html

Answer 3

至少可以在 Windows 7 上的标准2.3.3模拟器中录制音频； 我已经试过了，它有效。 但是，在我的情况下，录制的音频确实听起来有点奇怪（慢）。 我没有调查原因。

您需要为模拟器添加录音+播放支持（Android SDK 和 AVD 管理器 -> 虚拟设备 -> 编辑 -> 硬件 -> 新建）。 然后使用[MediaRecorder API][1]进行录音（MediaRecorder.AudioSource.MIC）。

代码是：

fMediaRecorder= new MediaRecorder();
fMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
fMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
fMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

fMediaRecorder.setAudioChannels(1);
fMediaRecorder.setAudioSamplingRate(8000);

fMediaRecorder.setOutputFile(fTmpFile.getAbsolutePath());

fMediaRecorder.prepare();

fMediaRecorder.start();

你还需要

<使用权限android:name="android.permission.RECORD_AUDIO"/>

在您的 AndroidManifest.xml 中。

对我有用，但音频失真。