Transcript
行動 APP 開發管理實務Android Studio Overview and Practice
尹君耀 Xavier Yin
Outline
Environment
Android Studio Overview
Project Structure
The First Android App
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
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
Devices
Real Devices– With USB
Android Emulator– android avd
Genymotion– Plugin
Android Studio Overview
Interface
Android Studio Overview
Interface– Tool bar
Android Studio Overview
Interface– Tool bar
– Navigation bar
Android Studio Overview
Interface– Tool bar
– Navigation bar
– Project structure
Android Studio Overview
Interface– Tool bar
– Navigation bar
– Project structure
– Code editor
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
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
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
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
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
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
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
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
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
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
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
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
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
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.
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.
App Manifest
App Manifest
App Manifest
Dimens
DPI (Dots Per Inch)– The quantity of pixels within a physical area of the screen;
usually referred to as dpi (dots per inch).
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
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.
The First Android App
Requirements
The First Android App
Requirements 10dp
10dp#FFEFAAE5
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
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
Sample Code and Slides
Slides– Slideshare
Sample Code– https://github.com/xavier0507/TKUSampleCode.git
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