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Android Study Jam
apoio de:
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+GDGCoimbra
@GDGCoimbra
[email protected]
fb.me/GDGCoimbra gdgcoimbra.github.io gdgcoimbra.slack.com
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No content
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Events
- Study Jam
- Developer/ Inside Stories
- Software Craftsmanship
- Google DevFest
- Google Summit
- GDG Kids
- … make your suggestion!
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Study
Jam
Worldwide
in GDG Yangon
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Android
adj.
Possessing human features.
n.
A mobile robot or automaton, especially one that resembles a human.
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Schedule
#1 - Building layouts
#2 - Making an App Interactive
#3 - Work with the Android Framework and Control Flow
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Lollipop
11/2014
Marshmallow
10/2015
KitKat
09/2013
Jelly Bean
08/2012
Ice Cream
sandwich
10/2011
Honeycomb
02/2011
Gingerbread
12/2010
Froyo
05/20103
Eclair
10/2009
Donut
09/2009
Cupcake
04/2009
Beta
02/2009
Alpha
09/2008
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Google
Play
TV
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Google
Play
Instagram
1 000 000 000
4.5
LinkedIn
100 000 000
4.2
Hangouts
5 000 000 000
3.9
Strava
10 000 000
4.6
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Looking for Android SDK location…
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15
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Android is starting…
Starting course
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Lesson
1:
Building
layouts
- TextView
- ImageView
- Button
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Demystify
ImageView
TextView
defined on XML
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Lesson
1:
XML
Syntax
attribute name attribute value
view element
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Lesson
1:
XML
Syntax
density-independent pixels
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Lesson
1:
Building
layouts
HTC Wildfire S
medium resolution device
Samsung Galaxy S2
high resolution device
LG Nexus 4
extra-high resolution device
mdpi hdpi xhdpi
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Lesson
1:
Building
layouts
HTC Wildfire S
medium resolution device
Samsung Galaxy S2
high resolution device
LG Nexus 5
extra-high resolution device
mdpi hdpi xhdpi
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Lesson
1:
2x2
Pixels
HTC Wildfire S
medium resolution device
Samsung Galaxy S2
high resolution device
LG Nexus 5
extra-high resolution device
mdpi hdpi xhdpi
???
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Lesson
1:
2x2
dp
HTC Wildfire S
medium resolution device
Samsung Galaxy S2
high resolution device
LG Nexus 5
extra-high resolution device
mdpi hdpi xhdpi
same physical size
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Lesson
1:
XML
Syntax
scale-independent pixels
adjusts based on user preferences
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Lesson
1:
Building
layouts
attribute name attribute value
view element
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Lesson
1:
android:scaleType
center fitCenter fitXY centerCrop
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Lesson
1:
Building
layouts
1 2 3 1
2
3
1
2
3
1
2
3
Horizontal Linear Layout Vertical Linear Layout Vertical LL Equal Height Vertical LL LeftOver Height
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Lesson
1:
View
Groups
container
closing tag
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action bar
list view custom list view row
tab widget
• image view
• text view
• linear layout
• relative
layout
• …
Demystify
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grid view
custom view
tab widget
custom view
• image view
• text view
• linear layout
• relative layout
• image button
• …
Demystify
action bar
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horizontal scroll view
image view
custom view
• linear layout
• image button
• image view
window full screen
Demystify
action bar
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real time preview
project structure
view content
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- Select the views
- Position the views
- Style the views
Exercise
#1
-‐
Create
a
Birthday
Card
app
Happy Birthday
Happy Birthday, Sérgio!
From, GDGCoimbra!
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Lesson
2:
Making
an
App
Interactive
Just Java
QUANTITY
2
- +
PRICE
$10
ORDER
TextView
Button
android:id
android:margin
android:textAllCaps
android:onClick
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- Select the views
- Position the views
- Style the views
Exercise
2:
Create
a
Coffee
Order
app
Just Java
QUANTITY
2
- +
PRICE
Total: $10
Thank you!
ORDER
Just Java
QUANTITY
2
- +
PRICE
$10
ORDER
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Lesson
3:
Work
with
the
Android
Framework
and
Control
Flow
Resource Type in Java code in XML
Image R.drawable.photo @drawable/photo
String R.string.hello @string/hello
Layout XML file R.layout.activity_main @layout/activity_main
ID R.id.text_view @id/text_view
Color R.color.red @color/red
hello
olá
bonjour
app_name
#FF0000
#00FF00
#0000FF
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- 2 Million apps on Google Play
- (User) Default applications
- Do not reinvent the wheel
Lesson
3:
Work
with
the
Android
Framework
and
Control
Flow
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Lesson
3:
Work
with
the
Android
Framework
and
Control
Flow
Just Java
QUANTITY
2
- +
PRICE
$10
TOPPINGS
Whipped cream
ORDER SUMMARY
No whipped cream
Name: GDGCoimbra
Quantity: 2
Total: 10$
ScrollView
Change to landscape
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Exercise
3:
Add
new
functionalities
Just Java
QUANTITY
2
- +
PRICE
$10
TOPPINGS
Whipped cream
ORDER SUMMARY
No whipped cream
Name: GDGCoimbra
Quantity: 2
Total: 10$
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Exercise
3
Just Java
QUANTITY
2
- +
PRICE
$10
ORDER
TOPPINGS
Whipped cream
ORDER SUMMARY
No whipped cream
Name: GDGCoimbra
Quantity: 2
Total: 10$
Name
Chocolate
No chocolate
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Exercise
3:
Interact
with
other
apps
Just Java
QUANTITY
2
- +
PRICE
$10
ORDER
TOPPINGS
Whipped cream
ORDER SUMMARY
No whipped cream
Name: GDGCoimbra
Quantity: 2
Total: 10$
Name
Chocolate
No chocolate
intent
action
data
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- Allows other app to perform an action
- No need to (re)implement functionalities
- No need to know each app will be triggered
Lesson
3:
Work
with
the
Android
Framework
and
Control
Flow
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Lesson
3:
Work
with
the
Android
Framework
and
Control
Flow
Intent
intent
=
new
Intent(Intent.ACTION_SENDTO);
intent.setData(Uri.parse(“mailto:”));
intent.putExtra(Intent.EXTRA_SUBJECT,
“Order
for:
“
+
name);
intent.putExtra(Intent.EXTRA_TEXT,
message);
if
(intent.resolveActivity(getPackageManager())
!=
null
{
startActivity(intent);
}
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- Educational app that teaches 5 new things
- Any subject
- User interaction
- Link with other applications
Project
From, GDGCoimbra!
Android is starting…
Starting application
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Project
- Two weeks for completion
- Continuous feedback
- Best practices
- You can reach us on G+/ Slack/ etc.
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Project
Worldwide
From, GDGCoimbra!
Apprendre les bases du roller by Christophe KindJI Traffic Signs SA by Rulani Nevhufumba Brain Training Game by Kostya Bakay
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- developer.android.com/develop/index.html
- google.com/design/spec/material-design/introduction.html
- vogella.com/tutorials/Android/article.html
- android-arsenal.com/demo
- java2s.com/Code/Android/CatalogAndroid.htm
Materials
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gdgcoimbra.github.io
[email protected]
/GDGCoimbra
+GDGCoimbra
@GDGCoimbra
gdgcoimbra.slack.com
@cafonsomota @nunoar
@bffcorreia @sdsantos