黑莓OS10开发(2) 选择本地文件1

刺骨的言语ヽ痛彻心扉 2023-08-17 15:24 78阅读 0赞

using namespace bb::cascades;
    typedef bb::cascades::pickers::FilePicker FFilePicker;
    typedef bb::cascades::pickers::FileType FFileType;
    typedef bb::cascades::pickers::FilePickerMode FFilePickerMode;

bb::cascades::pickers::FilePicker* filePicker = new bb::cascades::pickers::FilePicker();
    	openFileFromCode(filePicker);
    	bool connectResult;
    
    	//初始化信息
    	Q_UNUSED(connectResult);
    
    	//将filePicker的fileSelected事件关联到onFileSelected函数上，并且将关联结果返回
    	connectResult = QObject::connect(filePicker,
    			SIGNAL(fileSelected(const QStringList&)), this,
    			SLOT(onFileSelected(const QStringList&)));
    
    	//在debug模式中查看关联结果
    	Q_ASSERT(connectResult);
    
    	// 将取消按钮的行为关联到onCanceled函数上
    	connectResult = QObject::connect(filePicker, SIGNAL(canceled()), this,
    			SLOT(onCanceled()));
    
    	//在debug模式中查看关联结果
    	Q_ASSERT(connectResult);

private:
        static const QString m_personsFilePath;
        QTranslator* m_pTranslator;
        bb::cascades::LocaleHandler* m_pLocaleHandler;
        void writeFile(QString filename, QString message);
        QString readFile(QString filename) ;
        void openFileFromCode(bb::cascades::pickers::FilePicker* filePicker);

void ApplicationUI::onFileSelected(const QStringList & stringList) {
    	fprintf(stderr,"open file : %s\n",stringList.at(0).toLatin1().data());
    
    	QString filename ="./data/test.txt";
    	QString result =readFile(filename);
    	fprintf(stderr,"read result %s",result.toUtf8().data());
    
    }
    void ApplicationUI::onCanceled() {
    	fprintf(stderr,"cancel select file");
    }
    
    void ApplicationUI::openFileFromCode(FFilePicker* filePicker) {
    
    	filePicker->setType(FFileType::Picture);
    	filePicker->setTitle("Select Read File");
    	filePicker->setMode(FFilePickerMode::Picker);
    	filePicker->setDirectories(QStringList("/accounts/1000/shared/misc"));
    	filePicker->open();
    
    }

注意：当需要使用UTF-8来保存数据时，应该先讲文本转为UTF-8格式的QString。By default QString uses Latin1

QString unicodeString=QString::fromUtf8(*"1234测试"*);

void ApplicationUI::writeFile(QString filename, QString message) {
    	QFile file(filename);
    	if (file.open(QIODevice::WriteOnly|QIODevice::Text)) {
    		QTextStream out(&file);
    		out.setCodec("UTF-8");
    		out.setGenerateByteOrderMark(false);
    		out << message;
    	}
    	file.flush();
    	file.close();
    }
    QString ApplicationUI::readFile(QString filename) {
    	QFile file(filename);
    	if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
    		return "";
    	QTextStream textStream(&file);
    	textStream.setCodec("UTF-8");
    	QString result = textStream.readAll();
    	file.close();
    	return result;
    }