Android呼叫记录传入语音未被记录

Question

 myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
 myRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
 myRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
 myRecorder.setMaxDuration(60 * 60 * 1000);
 AudioManager audiomanager =
 (AudioManager)getSystemService(AUDIO_SERVICE);
 audiomanager.setMode(2);

更新：任何人都知道如何强迫另一个流到麦克风音频源。这需要原生android代码。请在这方面帮助我，请参考这个问题，以获得更多关于路由音频的详细信息

Answer 1

你需要使用NDK。以下是需要完成的功能示例。

加载libmedia.so和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;}

函数设置参数

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;}

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);
    }
}