modularization/src/tool/tool_service_maintain/main.cpp

#include "mainwindow.h"
#include <QApplication>

#include <QFile>


#ifdef Android
#include <QtAndroid>
//#include <QAndr

#endif

std::string gstrserverip = "127.0.0.1";//"192.168.1.102";

void LoadServerIP()
{
    QString strpath = "tool_service_maintain.txt";
#ifdef Android
    strpath = "/storage/emulated/0/tool_service_maintain.txt";
#endif
    QFile xFile;
    xFile.setFileName(strpath);
    if(!xFile.open(QIODevice::ReadOnly))
    {
        return;
    }
    std::string strip = xFile.readAll().toStdString();
    xFile.close();
    if(strip.length()<7)
    {
        return;
    }
    gstrserverip = strip;

}

void SaveServerIP()
{
    QString strpath = "tool_service_maintain.txt";
#ifdef Android
    strpath = "/storage/emulated/0/tool_service_maintain.txt";
#endif
    QFile xFile;
    xFile.setFileName(strpath);
    if(!xFile.open(QIODevice::ReadWrite))
    {
        return;
    }
    xFile.resize(0);
    xFile.write(gstrserverip.data(),static_cast<qint64>(gstrserverip.length()) );
    xFile.close();
}

#ifdef Android

bool requestPermission() {
   QtAndroid::PermissionResult  r = QtAndroid::checkPermission("android.permission.WRITE_EXTERNAL_STORAGE");
    if(r == QtAndroid::PermissionResult::Denied) {
        QtAndroid::requestPermissionsSync( QStringList() << "android.permission.WRITE_EXTERNAL_STORAGE" );
        r = QtAndroid::checkPermission("android.permission.WRITE_EXTERNAL_STORAGE");
        if(r == QtAndroid::PermissionResult::Denied) {
             return false;
        }
   }
   return true;
}

#endif

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

#ifdef Android
    requestPermission();
#endif

    LoadServerIP();
    MainWindow w;
    w.show();

    return a.exec();
}