行動App開發管理實務 unit1 - Android Studio Overview and Practice

1. 行動APP開發管理實務
Android Studio Overview and Practice
尹君耀 Xavier Yin

2. Outline
 Environment
 Android Studio Overview
 Project Structure
 The First Android App

3. Environment
 JDK
– Download JDK (or from Oracle)
– Installation and Environment Variable Settings
 JAVA_HOME
 PATH
 Installation result on cmd
 Android SDK and Studio
– Download Android SDK and Studio (or from Android Developer)
– Installation
 Launch the .exe file you just downloaded
 Follow the setup wizard

4. Android SDK
 Platform-tools folder
– Adb(Android Debug Bridge) instructions
 devices: Prints a list of all attached emulator/device instances.
 logcat: Prints log data to the screen.
 push: Copies a specified file from an emulator/device instance to your
development computer
 pull: Copies a specified file from your development computer to an
emulator/device instance.
 Tools folder
 Android
– avd: Launch the AVD Manager
– sdk: Launch the Android SDK Manager

5. Devices
 Real Devices
– With USB
 Android Emulator
– android avd
 Genymotion
– Plugin

6. Android Studio Overview
 Interface

7. Android Studio Overview
 Interface
– Tool bar

8. Android Studio Overview
 Interface
– Tool bar
– Navigation bar

9. Android Studio Overview
 Interface
– Tool bar
– Navigation bar
– Project structure

10. Android Studio Overview
 Interface
– Tool bar
– Navigation bar
– Project structure
– Code editor

11. Android Studio Overview
 Features
– Flexible Gradle-based build system
– Build variants and multiple apk file generation
– Code templates to help you build common app features
– Rich layout editor with support for drag and drop theme editing
– lint tools to catch performance, usability, version compatibility, and
other problems
– And much more

12. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

13. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

14. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

15. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

16. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

17. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

18. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

19. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

20. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

21. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

22. Android Studio Overview
 Details
– Auto Complete
– Build Variants
– Productivity Guild
– Multi Devices Debug
– Layout Preview for Multi Devices
– Plugins
– Code Template
– Layout Tools Attributes
– Resource Preview
– And much more

23. Project Structure
 /app
– /src
 /main/java
– /your_package_name (ex: /com/tku/android -> com.tku.android)
 Java files
– AndroidManifest.xml
 /androidTest(For Android Test)
– /java/your_package_name
 Test cases
 /res
– /drawable
– /layout
– /values
 colors.xml, dimens.xml, strings.xml, styles.xml…etc.
 build.gradle

24. Resources
 Drawable
– A drawable resource is a general concept for a graphic that can be
drawn to the scree.
 values
– strings: A string resource provides text strings for your application with
optional text styling and formatting.
– colors: A ColorStateList is an object you can define in XML that you can
apply as a color, but will actually change colors, depending on the state of
the View object to which it is applied.
– styles: A style resource defines the format and look for a UI.
– dimens: A dimension is specified with a number followed by a unit of
measure.

25. App Manifest
 Manifest file
– The manifest file presents essential information about your app to the
Android system, information the system must have before it can run
any of the app's code.
 Permission
– A basic Android application has no permissions associated with it by
default, meaning it cannot do anything that would adversely impact
the user experience or any data on the device.
– To make use of protected features of the device, you must include in
your AndroidManifest.xml one or more <uses-permission> tags
declaring the permissions that your application needs.

26. App Manifest

27. App Manifest

28. App Manifest

29. Dimens
 DPI (Dots Per Inch)
– The quantity of pixels within a physical area of the screen; usually
referred to as dpi (dots per inch).

30. Dimens
 PX, DPI and DP(DIP)
– Icon size = 160px
 MDPI -> 160px/160dpi = 1 inch
 XHDPI -> 160px/320dpi = 0.5 inch
– Icon size = 160dp -> px = dp * (dpi / 160 )
 MDPI -> px = 160 * ( 160dpi / 160dpi ) , px = 160
 XHDPI -> px = 160 * ( 320dpi / 160dpi) , px = 320

31. Dimens
 Suggestions
– Because it's important that you design and implement your layouts for
multiple densities, the guidelines below and throught the
documentation refer to layout dimensions with dp measurements
instead of pixels.
– Similarly, you should prefer the sp (scale-independent pixel) to define
text sizes. The sp scale factor depends on a user setting and the system
scales the size the same as it does for dp.

32. The First Android App
 Requirements

33. The First Android App
 Requirements 10dp
10dp
#FFEFAAE5

34. The First Android App
 Create a new project
– Empty project
 Define resources that you need
– Colors.xml, dimens.xml, strings.xml, styles.xml, drawable
 Prepare Layout files
– Add Android Resource Directory named layout within res folder
– Add a layout.xml
 LinearLayout

35. The First Android App
 Bind the above files with your java files
– Activity
 SetContentView()
 FindViewById()
 Define App Manifest file
– Intent
– Intent-filter
 Launch your App in a device

36. Sample Code and Slides
 Slides
– Slideshare
 Sample Code
– https://github.com/xavier0507/TKUSampleCode.git