Initial version.

Author: maxrd2

.gitignore

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+# This file is used to ignore files which are generated
+# ----------------------------------------------------------------------------
+
+*~
+*.autosave
+*.a
+*.core
+*.moc
+*.o
+*.obj
+*.orig
+*.rej
+*.so
+*.so.*
+*_pch.h.cpp
+*_resource.rc
+*.qm
+.#*
+*.*#
+core
+!core/
+tags
+.DS_Store
+.directory
+*.debug
+Makefile*
+*.prl
+*.app
+moc_*.cpp
+ui_*.h
+qrc_*.cpp
+Thumbs.db
+*.res
+*.rc
+/.qmake.cache
+/.qmake.stash
+/build-*
+
+# qtcreator generated files
+*.pro.user*
+CMakeLists.txt.user
+
+# xemacs temporary files
+*.flc
+
+# Vim temporary files
+.*.swp
+
+# Visual Studio generated files
+*.ib_pdb_index
+*.idb
+*.ilk
+*.pdb
+*.sln
+*.suo
+*.vcproj
+*vcproj.*.*.user
+*.ncb
+*.sdf
+*.opensdf
+*.vcxproj
+*vcxproj.*
+
+# MinGW generated files
+*.Debug
+*.Release
+
+# Python byte code
+*.pyc
+
+# Binaries
+# --------
+*.dll
+*.exe
+

DivvyDroid.pro

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+#-------------------------------------------------
+#
+# Project created by QtCreator 2019-05-06T12:13:40
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = DivvyDroid
+TEMPLATE = app
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+CONFIG += c++11
+
+SOURCES += \
+        adbshell.cpp \
+        main.cpp \
+        mainwindow.cpp
+
+HEADERS += \
+        adbshell.h \
+        mainwindow.h
+
+FORMS += \
+        mainwindow.ui
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

adbshell.cpp

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+#include "adbshell.h"
+
+#include <QDebug>
+
+#define SHELL_RC_SEPARATOR "-!-!SHELL-RC!-!-"
+
+AdbShell::AdbShell(QObject *parent)
+	: QProcess(parent)
+{
+	connect(this, &AdbShell::stateChanged, [](ProcessState state){
+		qDebug() << "ADB SHELL state:" << state;
+	});
+
+	start(QStringLiteral("adb"), QStringList() << QStringLiteral("shell") << QStringLiteral("-T"));
+}
+
+AdbShell::~AdbShell()
+{
+	waitForStarted();
+	write("exit\n");
+	waitForFinished();
+}
+
+AdbShell::Res
+AdbShell::execute(QByteArray command)
+{
+	waitForStarted();
+	write(command);
+	write("\necho \":$?" SHELL_RC_SEPARATOR "\"\n");
+	waitForBytesWritten();
+
+	AdbShell::Res res;
+	do {
+		waitForReadyRead();
+		res.out.append(readAllStandardOutput());
+		res.err.append(readAllStandardError());
+	} while(!res.out.endsWith(SHELL_RC_SEPARATOR "\n"));
+
+	int i = res.out.size() - sizeof(SHELL_RC_SEPARATOR);
+	while(i > 0 && res.out.at(i) != ':')
+		i--;
+	res.rc = res.out.mid(i + 1).toInt();
+	res.out.truncate(i);
+	qDebug() << "SHELL " << command << "; rc:" << res.rc;
+
+	return res;
+}

adbshell.h

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+#ifndef ADBSHELL_H
+#define ADBSHELL_H
+
+#include <QProcess>
+
+class AdbShell : public QProcess
+{
+public:
+	struct Res {
+		int rc;
+		QByteArray out;
+		QByteArray err;
+	};
+
+	AdbShell(QObject *parent = nullptr);
+	virtual ~AdbShell();
+
+	Res execute(QByteArray command);
+};
+
+#endif // ADBSHELL_H

main.cpp

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+#include "mainwindow.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+	QApplication a(argc, argv);
+	MainWindow w;
+	w.show();
+
+	return a.exec();
+}

mainwindow.cpp

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+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+
+#include <QElapsedTimer>
+#include <QDebug>
+
+MainWindow::MainWindow(QWidget *parent)
+	: QMainWindow(parent),
+	  ui(new Ui::MainWindow),
+	  m_screenTimer(this),
+	  m_shell(this)
+{
+	ui->setupUi(this);
+
+	connect(&m_screenTimer, &QTimer::timeout, [&](){
+		QElapsedTimer timer;
+		timer.start();
+		AdbShell::Res res = m_shell.execute("/system/bin/screencap -j");
+		qDebug() << "SCREEN frame retrieved in" << timer.elapsed() << "ms";
+		QImage img(QImage::fromData(res.out).scaledToWidth(360, Qt::SmoothTransformation));
+		ui->screen->setPixmap(QPixmap::fromImage(img));
+	});
+	m_screenTimer.start(40);
+}
+
+MainWindow::~MainWindow()
+{
+	delete ui;
+}

mainwindow.h

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+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QTimer>
+#include "adbshell.h"
+
+
+namespace Ui {
+class MainWindow;
+}
+
+class MainWindow : public QMainWindow
+{
+	Q_OBJECT
+
+public:
+	explicit MainWindow(QWidget *parent = nullptr);
+	~MainWindow();
+
+private:
+	Ui::MainWindow *ui;
+
+	QTimer m_screenTimer;
+	AdbShell m_shell;
+};
+
+#endif // MAINWINDOW_H

mainwindow.ui

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+<?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>320</width>
+    <height>480</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string notr="true">DivvyDroid</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <property name="spacing">
+     <number>0</number>
+    </property>
+    <property name="leftMargin">
+     <number>0</number>
+    </property>
+    <property name="topMargin">
+     <number>0</number>
+    </property>
+    <property name="rightMargin">
+     <number>0</number>
+    </property>
+    <property name="bottomMargin">
+     <number>0</number>
+    </property>
+    <item>
+     <widget class="QLabel" name="screen">
+      <property name="scaledContents">
+       <bool>false</bool>
+      </property>
+      <property name="alignment">
+       <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+      </property>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menuBar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>320</width>
+     <height>30</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QToolBar" name="mainToolBar">
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>