android - 如何使用 AudioSource.VOICE_CALL 录制语音通话

Question

尝试录制通话，我在使用 AudioSource.MIC 或 AudioSource.VOICE_COMMUNICATION 时使用 MediaRecorder 类 它只录制我的声音而不是来自接收者当我使用 AudioSource.VOICE_CALL 时，它会在参加通话时出现异常。这是代码

if(intent.getAction().equals("android.intent.action.PHONE_STATE")){
            if((bundle = intent.getExtras()) != null){
                state = bundle.getString(TelephonyManager.EXTRA_STATE);
                if(state.equals(TelephonyManager.EXTRA_STATE_RINGING)){
                    inCall = bundle.getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
                    wasRinging = true;
                    Toast.makeText(context, inCall + " is calling", Toast.LENGTH_SHORT).show();
                }
                else if(state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)){
                    if(wasRinging){
                        Toast.makeText(context, "Call Answered", Toast.LENGTH_SHORT).show();
                        Date date = new Date();
                        SimpleDateFormat format = new SimpleDateFormat("dd-MM-yyyy_HH-mm-ss");

                        String filename = "rec_" + format.format(date) + ".mp3";
                        String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).getPath();
                        String fileUri = path + "/" + filename;
                        Log.v("testing uri", fileUri);
                        File file = new File(fileUri);

                        recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);
                        recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
                        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
                        recorder.setOutputFile(file.getAbsolutePath());

                        try {
                            recorder.prepare();
                            recorder.start();
                            recording = true;

                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
                else if(state.equals(TelephonyManager.EXTRA_STATE_IDLE)){
                    wasRinging = false;
                    Toast.makeText(context, "Cancelled", Toast.LENGTH_SHORT).show();
                    if(recording && recorder != null){
                        recorder.stop();
                        recorder = null;
                        recording = false;
                    }
                }
            }
        }

这是错误..

java.lang.RuntimeException: Error receiving broadcast Intent { act=android.intent.action.PHONE_STATE flg=0x10 (has extras) } in com.asadullah.callrecorder.MyBroadCastReceiver@41d6c7a8
   at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:778)
   at android.os.Handler.handleCallback(Handler.java:733)
   at android.os.Handler.dispatchMessage(Handler.java:95)
   at android.os.Looper.loop(Looper.java:136)
   at android.app.ActivityThread.main(ActivityThread.java:5102)
   at java.lang.reflect.Method.invokeNative(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:515)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
   at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: start failed.
   at android.media.MediaRecorder.start(Native Method)
   at com.asadullah.callrecorder.MyBroadCastReceiver.onReceive(MyBroadCastReceiver.java:62)
   at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:768)

list 权限是:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.STORAGE" />

Answer 1

VOICE_CALL 现已弃用。这就是发生此错误的原因。

使用 VOICE_COMMUNICATION 作为 AudioSource，因为它是针对 VoIP 等语音通信调整的麦克风音频源。

我也在使用通话录音应用程序，但它在 Android 7.1.1 中失败了

如果您没有在 Android 7.1.1 上尝试通话记录，下面的代码将起作用。

recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_COMMUNICATION);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);