安卓下的代码在MinGW下调试会从出错
.pro文件后面添加
contains(ANDROID_TARGET_ARCH,armeabi-v7a) {
QT += androidextras
}
cpp文件中添加
#ifdef Q_OS_ANDROID
#include<QtAndroid>
#endif
读写权限
bool requestReadPermission() {
#ifdef Q_OS_ANDROID
QtAndroid::PermissionResult r = QtAndroid::checkPermission("android.permission.READ_EXTERNAL_STORAGE");
if(r == QtAndroid::PermissionResult::Denied) {
// QMessageBox::information(0,"requestWritePermission22222","PermissionResult::Denied");
QtAndroid::requestPermissionsSync( QStringList() << "android.permission.READ_EXTERNAL_STORAGE" );
r = QtAndroid::checkPermission("android.permission.READ_EXTERNAL_STORAGE");
if(r == QtAndroid::PermissionResult::Denied) {
return false;
}
}
#endif
return true;
}
bool requestWritePermission() {
#ifdef Q_OS_ANDROID
QtAndroid::PermissionResult r = QtAndroid::checkPermission("android.permission.WRITE_EXTERNAL_STORAGE");
if(r == QtAndroid::PermissionResult::Denied) {
// QMessageBox::information(0,"requestWritePermission","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
}
我的读写函数
void ReadMyData()
{
requestReadPermission();
FILE *ffp;
#ifdef Q_OS_ANDROID
if((ffp=fopen((const char *)"/sdcard/s_v.quo","rb"))==NULL)
#else
if((ffp=fopen((const char *)"d:\\s_v.quo","rb"))==NULL)
#endif
return ;
fseek(ffp,0,SEEK_SET);
fread(&m_save,sizeof(Def_Save),1,ffp);
if(m_save.myunit<0||m_save.myunit>3)
m_save.myunit=0;
fclose(ffp);
}
void SaveMyData()
{ FILE *ffp;
requestWritePermission();
#ifdef Q_OS_ANDROID
if((ffp=fopen((const char *)"/sdcard/s_v.quo","wb+"))==NULL)
#else
if((ffp=fopen((const char *)"d:\\s_v.quo","wb+"))==NULL)
#endif
{
// fclose(ffp);
return ;
// exit(1);
}
fseek(ffp,0,SEEK_SET);
fwrite(&m_save,sizeof(Def_Save),1,ffp);
// qDebug()<<m_save.p_no;
fclose(ffp);
}