Android Call Recording Incoming voice not getting recorded

Question

I\'m working auto call recorder app, I\'m able to record voice call on below android 6 using MediaRecorder.AudioSource.VOICE_CALL, From android 6 not able to r

Answer 1

Xiaomi devices always have problems with permission request even run-time or install-time.

I have an Xiaomi Redmi 3 pro, and it always force to Deny some permission when I install apps, so I must manually Allow it. If your problem is the same, I found some workaround solution and it worked for me: How to get MIUI Security app auto start permission programmatically?

Answer 2

You need to use ndk. Here are examples of the functions that need to be done.

Load libmedia.so and libutils.so

int load(JNIEnv *env, jobject thiz) {
    void *handleLibMedia;
    void *handleLibUtils;
    int result = -1;
    lspr func = NULL;

    pthread_t newthread = (pthread_t) thiz;

    handleLibMedia = dlopen("libmedia.so", RTLD_NOW | RTLD_GLOBAL);
    if (handleLibMedia != NULL) {
        func = dlsym(handleLibMedia, "_ZN7android11AudioSystem13setParametersEiRKNS_7String8E");
        if (func != NULL) {
            result = 0;
        }
        audioSetParameters = (lasp) func;
    } else {
        result = -1;
    }

    handleLibUtils = dlopen("libutils.so", RTLD_NOW | RTLD_GLOBAL);
    if (handleLibUtils != NULL) {
        fstr = dlsym(handleLibUtils, "_ZN7android7String8C2EPKc");
        if (fstr == NULL) {
            result = -1;
        }
    } else {
        result = -1;
    }

    cmd = CM_D;

    int resultTh = pthread_create(&newthread, NULL, taskAudioSetParam, NULL);

    return result;}

Function setParameters

int setParam(jint i, jint as) {
pthread_mutex_lock(&mt);

audioSession = (int) (as + 1);

kvp = "input_source=4";
kvps = toString8(kvp);

cmd = (int) i;

pthread_cond_signal(&cnd);
pthread_mutex_unlock(&mt);

return 0;}

Task AudioSetParameters

void *taskAudioSetParam(void *threadid) {
    while (1) {
        pthread_mutex_lock(&mt);
        if (cmd == CM_D) {
            pthread_cond_wait(&cnd, &mt);
        } else if (audioSetParameters != NULL) {
             audioSetParameters(audioSession, kvps);
        }
        pthread_mutex_unlock(&mt);
    }
}

There is a library and an example of use https://github.com/ViktorDegtyarev/CallRecLib

Answer 3

try

 MediaRecorder.AudioSource.VOICE_COMMUNICATION

and see

https://androidforums.com/threads/android-phone-with-call-recording-function.181663/

Answer 4

First these 3 permissions are needed in Manifest as well as a runtime permission request if the device is above Marshmallow,

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAPTURE_AUDIO_OUTPUT" />

2. MediaRecorder.AudioSource.VOICE_CALL is not supported on all phones so you need to continue using MediaRecorder.AudioSource.MIC.

I use this and works fine on most of the devices,

      recorder = new MediaRecorder();
      recorder.setAudioSource(audioSource);
      recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
      recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
      recorder.setOutputFile(your_path);

3. You need to set this to record your calls properly,

   audioManager.setMode(AudioManager.MODE_IN_CALL);

raise volume level when you start recording

audioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL,audioManager.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL), 0);

When you stop recording set the mode to normal, audioManager.setMode(AudioManager.MODE_NORMAL); and also set the stream volume to back how it was.

Answer 5

In automatic call recorder (callU) have a option "SoundFX" If Enable Record Calls Two Side

Link

Answer 6

This could be a Permission related issue.

With the introduction of Android 6.0 Marshmallow, the app will not be granted any permission at installation time. Instead, the application has to ask the user for a permission one-by-one at run-time.

I hope you have included the code which explicitly asks for permissions on devices with Marshmallow and above.