Rapid Application Development

Transcription

1 Rapid Application Development Chapter 7: Development RAD with CASE tool: App Inventor And Cloud computing Technology Cr: appinventor.org Dr.Orawit Thinnukool College of Arts, Media and Technology, Chiang Mai University

2 Contents - Introduction to App Inventor - Characteristics Cloud computing - App Inventor Process - Preparing App Inventor environment - Learning App Inventor tools

3 Introduction to App Inventor Professor David Wolber MIT App Inventor is the fastest way to build apps for Android phones and tablets. Even with no prior experience, you can learn to build apps within hours. You'll learn from USF Professor David Wolber, who has been teaching beginners programming with App Inventor since its inception in 2009.

4 Introduction to App Inventor - Cloud computing is a recently evolved computing terminology or metaphor based on utility and consumption of computing resources. -Cloud computing involves deploying groups of remote servers and software networks that allow centralized data storage and online access to computer services or resources. Clouds can be classified as public, private or hybrid. - App Inventor also used Cloud computing technology to contribute android application.

5 Introduction to App Inventor If you do not have an Android phone or tablet, you can still build apps with App Inventor. App Inventor provides an Android emulator, which works just like an Android but appears on your computer screen. So you can test your apps on an emulator and still distribute the app to others, even through the Play Store. Some schools and afterschool programs develop primarily on emulators and provide a few Androids for final testing.

6 Source: thumbsup.in.th Characteristics Cloud computing Cloud computing exhibits the following key characteristics: Agility improves with users' ability to re-provision technological infrastructure resources.

7 Service models of Cloud computing Cloud computing providers offer their services according to several fundamental models Infrastructure as a service (IaaS) IaaS clouds often offer additional resources such as a virtualmachine disk image library, raw block storage, and file or object storage. There is type of facility service such as storage which they supports the virtualization for software and application. -Support to fix the problem of Down Time - High Cost

8 Service models of Cloud computing Platform as a service (PaaS) - In the PaaS models, cloud providers deliver a computing platform, typically including operating system, programming language execution environment, database, and web server. Software-as-a-Service (SaaS) -Cloud providers services of Software and Application manage via internet system. -SaaS is sometimes referred to as "on-demand software" and is usually priced on a pay-per-use basis or using a subscription fee (rent). Cost of rent depends on number of users and rent-time. - Low cost maintenance

9 Advantage Cloud computing 1.Application programming interface (API) accessibility to software that enables machines to interact with cloud software in the same way that a traditional user interface (e.g., a computer desktop) facilitates interaction between humans and computers. 2.Cost reductions claimed by cloud providers. A public-cloud delivery model converts capital expenditure to operational expenditure. 3.Device and location independence enable users to access systems using a web browser regardless of their location or what device they use (e.g., PC, mobile phone). As infrastructure is offsite (typically provided by a third-party) and accessed via the Internet, users can connect from anywhere.

10 Characteristics Cloud computing 4.Maintenance of cloud computing applications is easier, because they do not need to be installed on each user's computer and can be accessed from different places. 5.Performance is monitored, and consistent and loosely coupled architectures are constructed using web services as the system interface. 6.Productivity may be increased when multiple users can work on the same data simultaneously, rather than waiting for it to be saved and ed. Time may be saved as information does not need to be re-entered when fields are matched, nor do users need to install application software upgrades to their computer.

11 Characteristics Cloud computing 7.Reliability improves with the use of multiple redundant sites, which makes well-designed cloud computing suitable for business continuity and disaster recovery. 8. Scalability and elasticity via dynamic ("on demand") provisioning of resources on a fine-grained, selfservice basis in near real-time. For example, App inventor calls program function via web browser.

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13 Setting up phone or emulator Before you can start working with App Inventor, a few things need to happen. Depending on what brand of phone you have, you need to download the drivers for your phone so that the computer and the phone can communicate. Google and put phone model and manufacturer into a search and you should find the correct drivers. If you can't find them right away, be sure to ask a counselor for help. If you don t have a phone then you should be all set, as App Inventor has a built in emulator that will simulate what you would see on a phone if one was connected to the computer

14 Preparing App Inventor environment Installing the App Inventor Setup software package. This step is the same for all Android devices, and the same for Windows XP, Vista, and 7. If you choose to use the USB cable to connect to a device, then you'll need to install Windows drivers for your Android phone. Download:

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16 Preparing App Inventor environment 4

17 Preparing App Inventor environment Click 5 >> Install and run to setup JAVA RUNTIME

18 Preparing App Inventor environment 6 Click

19 Preparing App Inventor environment Click 7

20 Preparing App Inventor environment 8 Click to download and Install

21 Preparing App Inventor environment 9 Click to start App inventor 10 Click to create new project

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23 Starting to App Inventor Username of developer Starting to project Go to mit.edu/ for download an application

24 Learning App Inventor tools Click to start a new project. 12

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