Reading and writing text file via c++ for Android. No root

android-read-write-file.cpp

#include <string.h>
#include <cstring>
#include <fstream>
#include <iostream>

std::string dir = "/data/data/uk.lgl.modmenu/cache/imei";
std::string buf = "whatever";
std::ifstream myfile(dir);
if (!myfile.is_open()) {
    std::ofstream os(dir.c_str(), std::ios::trunc);
    os.write(buf.c_str(), buf.length());
    os.close();

}

std::ifstream getfile("/data/data/uk.lgl.modmenu/cache/imei");
std::string line;
if (myfile.is_open())
{
    while (getline (getfile,line) )
    {
        std::cout << line << '\n';
    }
    myfile.close();
}