我在Android上使用了以下问题的解决方案来打开文件。
Qt/Necessitas - reasonable QFileDialog replacement/skin?
但它只适用于Android,这些代码(Qt Android Extras C++ Classes)不能在Windows上运行?
例如我有以下错误?
#include<QAndroidJniObject>
#include<QtAndroid>
#include<QAndroidActivityResultReceiver>
无法打开包含文件:'QAndroidJniObject':没有这样的文件或目录
我用它来解决
#if defined(Q_OS_ANDROID)
#include<QAndroidJniObject>
#include<QtAndroid>
#include<QAndroidActivityResultReceiver>
#endif
但是当我使用它时,我又有另一个错误?
class ResultReceiver:public QAndroidActivityResultReceiver//error :'QAndroidActivityResultReceiver': base class undefined
{
AndroidFileDialog *_dialog;
public:
ResultReceiver(AndroidFileDialog *dialog);
virtual ~ResultReceiver();
void handleActivityResult(int receiverRequestCode, int resultCode, const QAndroidJniObject &data);
QString uriToPath(QAndroidJniObject uri);
};
'QAndroidActivityResultReceiver':基类未定义
类ResultReceiver
继承了你正确停止的QAndroidActivityResultReceiver
(来自Android Extras),包括Windows操作系统,因此错误。
ResultReceiver
class, one for Windows, another for Android. When you design it for Windows you should not inherit QAndroidActivityResultReceiver
and use QFileDialog
.
In the same way you solved the import
issues with Qt pre-processor, you could define ResultReceiver
class , for example:
#if defined(Q_OS_ANDROID)
class AndroidFileDialog : public QObject
{
Q_OBJECT
...
private:
class ResultReceiver : public QAndroidActivityResultReceiver {
AndroidFileDialog *_dialog;
...
};
...
...
};
#else
class ResultReceiver // Here do not inherit classes from Android Extras
{
QFileDialog *_dialog; // use standard Qt C++ classes
...
...
};
#endif //Q_OS_ANDROID
这是可以理解的,项目是根据您的* .pro文件编译的,该文件包含所有项目文件。因此,您尝试在Windows上编译Android相关文件,因此您会收到错误。您应该根据目标操作系统在* .pro文件中包含/排除文件,例如:
SOURCES += \
common.cpp
HEADERS += \
common.h
win32 {
SOURCES += \
winfile.cpp
HEADERS += \
winfile.h
LIBS += -lwin
}
android {
SOURCES += \
androidfile.cpp
HEADERS += \
androidfile.h
LIBS += -landroid
}
因此不会编译/链接不必要的文件