文件名称:
OPC UA development for Android.pdf
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文件大小: 935kb
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上传时间: 2019-06-30
详细说明：在安卓平台上开发OPC UA。详细介绍了OPC UA的架构，以及android开发的方法、步骤等。Introduction
OPC UA has become increasingly popular recently
Smartdevice market has grown exponentially over the
last 10 years
Could we make use of the vast amount of smartdevices
in an oPc ua environment?
Aalto University
School of electrical
Engineering
Targets
Determine if android is suitable for oPc ua
Implement an Android App that provides all of the
standard oPc ua client features
Evaluation of the android development environment
Consider possible use cases
Aalto University
School of electrical
Engineering
OPC Unified Architecture
Interoperability standard for secure and reliable
exchange of data for industrial applications
Platform independent, service oriented architecture
Specifications define the interface between clients and
Servers(or Servers and Servers
Aalto University
School of electrical
Engineering
OPC UA Address Space
Server has an Address space
Address Space contains Nodes
Node relationships defined by references
Can be imagined as an hierarchial tree structure
Can have circular references
Aalto University
School of electrical
Engineering
OPC UA Services
Address Space information is accessed through
Services
Services provide interfaces for
Data access
Historical data access
alarms Conditions
Historical alarms Conditions
Methods
Aalto University
School of electrical
Engineering
Android Operating System
Open source mobile operating system
Currently developed by Google
The most popular operating system for smartdevices
Roughly 80% market share
Aalto University
School of electrical
Engineering
App development
The native programming language is Java
Using a java sdk for oPc ua is a solid choice
Android apps consist of four main components
Activitiⅰes
Services
Content providers
Broadcast receivers
Aalto University
School of electrical
Engineering
Activities and Fragments
Activities typically represent a single activity in an app
Fragments are User Interface elements for Activities
can represent a part of or a whole view
Design possibilities
Several activities with single fragment
Single activity with multiple fragments
Combination?
Aalto University
School of electrical
Engineering
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