All geek questions in one place

How to compile a simple Qt 5.2 project in C4Droid

I am trying to understand how to build and compile a simple Qt project in C4Droid, the C ++ compiler for Android.

The program includes 2 simple examples: the "Hello world" shortcut (single file) and the Notepad example. The second seems interesting, but it concerns forms that create them entirely from code.

I am exploring if this is done with forms created from .ui files. I created a simple project in Qt Creator for Qt 4.8, compiled the .ui form, and adapted the code from Qt 4.8 to Qt 5.2. The project itself is very simple: a form with QButton and QLineEdit. When QButton is pressed, "Hello world" appears in QLineEdit.

As far as I saw, C4Droid does not parse .pro files. To compile the project, I have to open main.cpp and click “compile”, select “Compile multiple source code files (simple)”, and then run. C4droid uses its own makefile in a .c4droid text file.

These are the files that I published in the C4droid test folder:

ButtonHelloWorld.pro:

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = ButtonHelloWorld
TEMPLATE = app

SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

main.cpp:

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

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

mainwindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void on_ButtonSayHello_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_ButtonSayHello_clicked()
{
    ui->LeditSayHello->setText(tr("Hello world"));
}

ui_mainwindow.h:

#ifndef UI_MAINWINDOW_H
#define UI_MAINWINDOW_H

#include <QtCore/QVariant>
#include <QAction>
#include <QApplication>
#include <QButtonGroup>
#include <QHeaderView>
#include <QLineEdit>
#include <QMainWindow>
#include <QPushButton>
#include <QVBoxLayout>
#include <QWidget>

QT_BEGIN_NAMESPACE

class Ui_MainWindow
{
public:
    QWidget *centralWidget;
    QVBoxLayout *verticalLayout;
    QPushButton *ButtonSayHello;
    QLineEdit *LeditSayHello;

    void setupUi(QMainWindow *MainWindow)
    {
        if (MainWindow->objectName().isEmpty())
            MainWindow->setObjectName(QString::fromUtf8("MainWindow"));
        MainWindow->resize(198, 103);
        centralWidget = new QWidget(MainWindow);
        centralWidget->setObjectName(QString::fromUtf8("centralWidget"));
        verticalLayout = new QVBoxLayout(centralWidget);
        verticalLayout->setSpacing(6);
        verticalLayout->setContentsMargins(11, 11, 11, 11);
        verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
        ButtonSayHello = new QPushButton(centralWidget);
        ButtonSayHello->setObjectName(QString::fromUtf8("ButtonSayHello"));

        verticalLayout->addWidget(ButtonSayHello);

        LeditSayHello = new QLineEdit(centralWidget);
        LeditSayHello->setObjectName(QString::fromUtf8("LeditSayHello"));
        LeditSayHello->setAlignment(Qt::AlignCenter);

        verticalLayout->addWidget(LeditSayHello);

        MainWindow->setCentralWidget(centralWidget);

        retranslateUi(MainWindow);

        QMetaObject::connectSlotsByName(MainWindow);
    } // setupUi

    void retranslateUi(QMainWindow *MainWindow)
    {
        MainWindow->setWindowTitle(QApplication::translate("MainWindow", "MainWindow", 0));
        ButtonSayHello->setText(QApplication::translate("MainWindow", "Say Hello", 0));
    } // retranslateUi

};

namespace Ui {
    class MainWindow: public Ui_MainWindow {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_MAINWINDOW_H

I put the original mainwindow.ui here for reference (c4droid does not use it):

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>198</width>
    <height>103</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralWidget">
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QPushButton" name="ButtonSayHello">
      <property name="text">
       <string>Say Hello</string>
      </property>
     </widget>
    </item>
    <item>
     <widget class="QLineEdit" name="LeditSayHello">
      <property name="alignment">
       <set>Qt::AlignCenter</set>
      </property>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections/>
</ui>

When I try to compile this project with main.cpp in C4droid, the output is:

/storage/emulated/0/Bull/C4Droid/ButtonHelloWorld/main.cpp:0: : . . /data/data/com.n0n3m4.droidc/files/gcc/tmpdir/ccyCC2RV.o: MainWindow::MainWindow(QWidget*)': mainwindow.cpp:(.text+0xc4): undefined reference to vtable MainWindow ' /data/data/com.n0n3m4.droidc/files/gcc/tmpdir/ccyCC2RV.o: MainWindow::~MainWindow()': mainwindow.cpp:(.text+0x14c): undefined reference to vtable MainWindow ' /data/data/com.n0n3m4.droidc/files/gcc/tmpdir/ccyCC2RV.o: MainWindow::tr(char const*, char const*, int)': mainwindow.cpp:(.text._ZN10MainWindow2trEPKcS1_i[_ZN10MainWindow2trEPKcS1_i]+0x5c): undefined reference to MainWindow:: staticMetaObject 'collect2: error: ld 1

, ?

, .moc, .

(, "C4Droid", : -/)

1 --- Qt , C4droid, , Makefile. Makefile, , :

/data/data/com.n0n3m4.droidc/files/gcc/qt/bin/qmake -spec android-g++ -o Makefile application.pro

( , moc, qmake, rcc uic /data/data/com.n0n3m4.droidc/files/gcc/qt/bin/ )

Makefile .pro, uic, moc .. . :

/data/data/com.n0n3m4.droidc/files/gcc/qt/bin/qmake -spec android-g++ -o Makefile ButtonHelloWorld.pro

, , :

sh: arm-linux-androideabi-gcc:

2

C4droid :

"C4droid .pro, . Google Play - , ".

, .pro C4droid. , "Makefile" Qt-, "ButtonHelloWorld.qexe" - .

, :

?

3

, () Qt appl. , .

:

. (/storage/emulated/0/Bull/C4Droid/application)

images folder
application.pro
application.qrc
main.cpp
mainwindow.cpp
mainwindow.h

, C4droid, application.pro, "". "Makefile" Qt-, "pplication.so". , " ".

"libapplication.so" , .

¿?

:

Android- Qt libXXX.so

:

, "libappli.so" .

, , , lib [NameOf.proFileWithoutExtension].so, . !

, .APK , Menu- > Export. ... !

. , .

+4
2

- Qt C4droid.

Qt C4Droid, ++ Android?

Qt Creator Qt 4.8, .ui Qt 4.8 Qt 5.2. : QButton QLineEdit. QButton , QLineEdit "Hello world".

, C4droid:

ButtonHelloWorld.pro:

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = ButtonHelloWorld
TEMPLATE = app

SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

main.cpp:

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

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

mainwindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void on_ButtonSayHello_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_ButtonSayHello_clicked()
{
    ui->LeditSayHello->setText(tr("Hello world"));
}

mainwindow.ui:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>198</width>
    <height>103</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralWidget">
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QPushButton" name="ButtonSayHello">
      <property name="text">
       <string>Say Hello</string>
      </property>
     </widget>
    </item>
    <item>
     <widget class="QLineEdit" name="LeditSayHello">
      <property name="alignment">
       <set>Qt::AlignCenter</set>
      </property>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections/>
</ui>

ButtonHelloWorld.pro main.cpp C4Droid. Long-tap Compile, "Makefile" Qt-, "libButtonHelloWorld.so" - .

: Android Qt libXXX.so. lib [NameOf.proFileWithoutExtension].so, .

, .APK , Menu- > Export.

... !!

PS: , moc, qmake, rcc uic, /data/data/com.n0n3m4.droidc/files/gcc/qt/bin/( , ).

+4

, "moc", . QObject.

:

moc -o mainwindow.moc mainwindow.h
g++ ... mainwindow.moc

, .. Makefile moc *.moc .

, C4Droid, , qmake 3.49.

0

Source: https://habr.com/ru/post/1539196/

More articles:


All Articles