1. Hello World Sample

2. Agenda
Hello World !!!
Interacting with Buttons
Screen Navigation
start Activity For Result
Intents
Activity
Services
Broadcast Receivers

3. Hello World !!!
1. Create a new Android Project
‫ﬤ‬ Select File > New > Android Project
2. Fill out the project details
‫ﬤ‬ Enter HelloWorld for Project Name
‫ﬤ‬ Select “Create new project in
workspace”
‫ﬤ‬ Enter HelloWorld in App name.
‫ﬤ‬ Enter com.enlume.HelloWorld in
Package Name
‫ﬤ‬ Enter HelloWorld in Activity name
(and yes we want to create an
Activity)

5. 5

6. 6

7. 7

8. 8

9. Interacting with Button
9

10. Interacting with Buttons
10

11. 11

12. Screen Navigation
12

13. 13

14. 14

15. 15

16. 16

17. 17

18. 18

19. Start Activity For Result

20. 20

21. 21

22. 22

23. 23

24. 24

25. Run hello world
• Select the root of the
project.
• Click in the ‘green play
icon’.
• Pick Android Project
• That will get the emulator
going…

26. The Android Manifest lists application
details
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android
"
package="com.my_domain.app.helloactivity">
<application android:label="@string/app_name">
<activity android:name=".HelloActivity">
<intent-filter>
<action
android:name="android.intent.action.MAIN"/>
<category
android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>

27. The Android Manifest File
 This file must declare all activities, services, broadcast receivers and content
provider of the application.
 It must also contain the required permissions for the application. For example if
the application requires network access it must be specified here
 It can be thought as the deployment descriptor for an Android application.
 The "package" attribute defines the base package for the following Java
elements
 "android:versionName" and "android:versionCode" specify the version of your
application.
 intent filter registered defines that this activity is started once the application
starts (action android:name="android.intent.action.MAIN").
 The category definition (category
android:name="android.intent.category.LAUNCHER" ) defines that this
application is added to the application directory on the Android device.
 The "uses-sdk" part defines the minimal SDK version your application is valid
for.

28. Questions?