安卓dlsym获取字符串的值

// 这个是so里的变量 char* a = "string from so";

char** a_ptr = reinterpret_cast<char**>(dlsym(handle, "a"));
    const char* a_value = *a_ptr;
    __android_log_print(ANDROID_LOG_INFO, "JNI", "a: %s", a_value);