ndk获取指定目录下的所有文件名

#include <jni.h>
#include <string>
#include <android/log.h>
#define LOG_TAG "MyCTestLog"
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)
#include <iostream>
#include <unistd.h>
#include <dirent.h>

void List(const char *path, int level, vector<string> &strvec)
{
    struct dirent* ent = NULL;
    DIR *pDir;
    pDir = opendir(path);
    if (pDir == NULL)
    {
        return;
    }
    while (NULL != (ent = readdir(pDir)))
    {
        if (ent->d_type == 8)
        {
//file
            strvec.push_back(ent->d_name);
        }
        else
        {
            if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
            {
                continue;
            }
//directory
            string _path(path);
            string _dirName(ent->d_name);
            string fullDirPath = _path + "/" + _dirName;
            List(fullDirPath.c_str(), level + 1, strvec);
        }
    }
}

extern "C"
JNIEXPORT void JNICALL
Java_com_example_ndkapplication_MainActivity_listFileFromJni2(JNIEnv *env, jobject thiz) {
    // TODO: implement listFileFromJni2()
    vector<string> files;
    List("/sdcard/Alarms",0,files);
    for (vector<string>::iterator iterator=files.begin();iterator!=files.end();++iterator) {
        LOGD("file name=%s", (*iterator).c_str());
    }
}

log打印如下：

2020-07-20 10:46:35.811 7397-7397/com.example.ndkapplication D/MyCTestLog: file name=1
2020-07-20 10:46:35.811 7397-7397/com.example.ndkapplication D/MyCTestLog: file name=3
2020-07-20 10:46:35.811 7397-7397/com.example.ndkapplication D/MyCTestLog: file name=3
2020-07-20 10:46:35.811 7397-7397/com.example.ndkapplication D/MyCTestLog: file name=6