julioz / audiocapturesample Goto Github PK

When I run this code in the emulator when playing music with another app, nothing is recorded. I tried several music apps.
All permissions are given.
I do get the popup message about the recording and I see the icon on top about the recoding.
The recoding file is saved, but when I open it, it only contains zeros.
I tried it on android 10 and 11.
Android 10: Automotive emulator and Polestar 2
Android 11: Automotive emulator (both with headset on and off)

Can you give me this project named by 《AudioCaptureSample》 with Java code?

I am trying to record youtube audio playback. When I play the .pcm file, I cannot hear anything. I am playing the recordings on a pcm player and my audio encoding is the same as in the java code.My android studio version is 3.5.0 and I am running code for android Q.

I have been implementing this functionality to record audio playbacks played on the device.

It is working fine when my app is in foreground, and I am getting pretty fine audio recordings, but it is throwing the below error whenever my app goes to background.

I have implemented this as a service and starting this service from another service which is a foreground service. I have tried all of the configuration for audioFormat but audioRecord object is failing to initialize.

Below is the function where app is crashed at run time.

private final void startAudioCapture() {

AudioPlaybackCaptureConfiguration config = new AudioPlaybackCaptureConfiguration.Builder(mediaProjection)
        .addMatchingUsage(AudioAttributes.USAGE_MEDIA)
        .build();

AudioFormat audioFormat = new AudioFormat.Builder()
        .setEncoding(AudioFormat.ENCODING_PCM_16BIT)
        .setSampleRate(8000)
        .setChannelMask(AudioFormat.CHANNEL_IN_MONO)
        .build();

if (ActivityCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
    return;
}
int bufferSize = AudioRecord.getMinBufferSize(8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
audioRecord = new AudioRecord.Builder()
        .setAudioFormat(audioFormat)
        .setBufferSizeInBytes(bufferSize)
        .setAudioPlaybackCaptureConfig(config)
        .build();
audioRecord.startRecording();
audioCaptureThread = new Thread() {
    @Override
    public void run() {
        File outputFile = createAudioFile();
        writeAudioToFile(outputFile);
    }
};

audioCaptureThread.start();
mIsRecording = true;

}
Errors:- E/IAudioFlinger: createRecord returned error -1 E/AudioRecord: createRecord_l(1): AudioFlinger could not create record track, status: -1 E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.Myapp.app.internal, PID: 18240 java.lang.RuntimeException: Unable to start service com.Myapp.app.AudioService@bfz0813 with Intent { act=AudioService:Start cmp=com.Myapp.app.internal/com.Myapp.app.AudioService }: java.lang.IllegalStateException: startRecording() called on an uninitialized AudioRecord.

Note:- This works perfect for all android version less than 11.

I am a student.

I want to rewrite this code in java.

for Microphone audio recording I get permission like the following.

public class Microphone extends AppCompatActivity {


public static boolean permissionToRecordAccepted = false;
private static final int REQUEST_RECORD_AUDIO_PERMISSION = 200;
private String[] permissions = {Manifest.permission.RECORD_AUDIO};


@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_microphone);


    if (this.checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
        requestPermissions(permissions, REQUEST_RECORD_AUDIO_PERMISSION);
    } else {
        permissionToRecordAccepted = true;
    }

    if (permissionToRecordAccepted) {
        System.out.println("permission granted.");
    }


}

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    switch (requestCode) {
        case REQUEST_RECORD_AUDIO_PERMISSION:
            permissionToRecordAccepted = (grantResults[0] == PackageManager.PERMISSION_GRANTED);
    }
}

}

I want to rewrite this code in java. But , I am confused .

I didn't know how to get permission for internal audio captureing in java.

Can you help me to get permission for internal audio ?