[ccdd2013w] coming to grips with deving for android by 蔡亦恒

I-Hen Tsai

Software Engineer

Delta Electronics Tainan Joint Labs

Requirements

Android SDK

Java JDK

Eclipse IDE

Some knowledge of Java programming

A modern computer

Guts

And maybe a beer…

2

Setting up the JDK

Download JDK

from Oracle

http://www.oracl

e.com/technetw

ork/java/javase/

downloads/jdk7

-downloads-

1880260.html

3

Setting up the Android SDK

http://developer.androi

d.com/sdk/index.html

SDK Manager:

\android-sdk-

windows\tools\android.

bat

Update as required

4

Setting up Eclipse IDE

http://www.eclipse.org/

downloads/

Pick a “Eclipse IDE for

Java Developers”

matching your OS

Unpack your download

5

Your new Android project (0)

On boot, Eclipse will ask where to put your

projects (your workspace)

Pick somewhere you wont forget, preferably with a

lot of space

Install ADT plugin & restart Eclipse

https://dl-ssl.google.com/android/eclipse/

6

Your new Android project (I)

Start a new “Android Application Project”

Give it a good name & pick an

appropriate minimum required SDK

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Your new Android project (II)

Pick a launcher icon

Pick a starting activity

Pick the navigation style

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Your new Android project (III)

You should get this screen when you are

done

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Your new Android project (IV)

You can also import an existing project

Menu: ”File”>>”Import”

Select Android project and pick the directory

path for it

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Basics

Each screen is an “activity”

Activity = code (Java) + UI layout (XML)

Code controls everything

Except modifying UI layouts

UI layout is composed of “widgets”

A button, an image or a textbox are all

widgets

The labels of widgets can be changed by

code

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Exploring your project

src: code

libs: reference libraries

bin: compiled apk

res: all media, layouts, visuals

res/layout: UI layout of all activities

AndroidManifest.xml: the heart of any Android project

Permissions

Declaring components

12

Debugging with Eclipse

If you want to use your physical device,

remember to turn on USB debugging

Settings >> Developer options >> USB

debugging

Emulation

DDMS

LogCat

13

Setting up an Android emulator (I)

Menu: “Window” >> “Android Virtual

Device Manager”

Select “New”

Select suitable attributes

14

Setting up an Android emulator (II)

Start your virtual device first to save time

15

Emulating your Android

application

Select one of your source files

Select the green “Run [your program name] button

First run only:

Select run as “Android Applicaiton”

Say “Yes” to LogCat, nyan~!

Viola!!

16

Emulating your Android

application (II)

If you didn’t start a virtual device first,

Eclipse will start one for you

Automatically selects first compatible device

Prompts you to create if you don’t have one

But you have to wait for it to boot

Might have to run again because it took too

long for the virtual device to start

17

Testing with other Android

devices

Menu: “Run” >> “Run Configurations…”

Switch to “Target” tab

Choose “Always prompt to pick device”

Now you get to choose a device every

time you run your application

18

DDMS (I)

Menu: “Window”>>”Open

perspective”>>”DDMS”

19

DDMS (II)

You can do a lot of things in the DDMS

File dump

Fake GPS

Check CPU load

20

LogCat (I)

Menu: “Window”>>”Show

View”>>”Other”>>”LogCat”

A log of everything computational on the

Android device

21

LogCat (II)

You can filter log data by:

Application

Debug level

You can also save the log

You can use code to send debug data to

LogCat

Better than using “push” popup messages

22

Debugging with Android SDK

Same as DDMS

\android-sdk-windows\tools\android.bat

23

Publishing your app

Compile in “release” config

APK file

Mail to people you want to share

Host on website for download

etc.

Publish to Google Play

Need Google account

USD 25 registration fee

24

Tricks for demoing

Make a video capture

Android emulator

BlueStacks

Droid @ Screen

25

BlueStacks

http://www.bluestacks.com/

Install a custom launcher and you are

ready to go

26

Droid @ Screen

http://droid-at-

screen.ribomation.com/

Requires Java & a USB

connection to your

Android device

Just specify where your

/sdk/platform-

tools/adb.exe resides

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Wrapping it up…

Read the documentation

Ask around on StackOverflow

Plan a lot

Don’t give up

Practice makes perfect!

And remember to have fun

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