This document discusses various open source Android libraries and tools that can be used to build Android applications more efficiently. It summarizes RoboGuice for dependency injection, ActionBarSherlock for action bar support, libraries like HTTP Request and GSON, and tools like ViewPagerIndicator, Robotium for testing, the Android Maven plugin, and fragments. It encourages leveraging these libraries and tools to build more with less code through reuse and integration of existing components.

1. building
More With Less
with android bootstrap

2. tweet tweet @donnfelker

4. Building More With Less

5. agenda
open source
libraries
examples
bootstrap

7. Pay with Square GitHub Gaug.es

8. tons of open source
tons of integration work

9. open source
roboguice
action bar sherlock
http-request
gson
view pager indicator
robotium
maven
android maven plugin
fragments

10. roboguice.org
roboguice
dependency injection
for android

11. roboguice.org
class RoboWay extends RoboActivity {
@InjectView(R.id.name) TextView name;
@InjectView(R.id.thumbnail) ImageView thumbnail;
@InjectResource(R.drawable.icon) Drawable icon;
@InjectResource(R.string.app_name) String myName;
@Inject LocationManager loc;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
name.setText( "Hello, " + myName );
}
}

12. roboguice.org
User Interface
Service Layer
ed a string
wha t if I ne e?
d own her
r esource
Persistence Layer
service layer: goo.gl/7NQVZ persistence layer: goo.gl/j5u74

13. roboguice.org
public class UserRepository {
@InjectResource(R.string.public_key) String publicKey;
public void saveProfile(UserProfile profile) {
// user publicKey to do some encryption
// Now, save the encrypted profile to db/api/etc
}
}

14. roboguice.org
public class UserRepository {
@InjectResource(R.string.public_key) String publicKey;
@Inject protected AuthService authService;
public void saveProfile(UserProfile profile) {
// Get auth token from auth service then save
// user publicKey to do some encryption
// Now, save the encrypted profile to api
}
}

15. roboguice.org
must extend
RoboActivity
RoboListActivity
RoboFragmentActivity
RoboListFragmentActivity
...

16. roboguice.org

17. actionbarsherlock.com
action bar sherlock
action bar support for pre 3.x

18. actionbarsherlock.com
Pay with Square GitHub Gaug.es

19. actionbarsherlock.com

20. actionbarsherlock.com
usage
getSupportActionBar()
native calls
supports theming
must use Sherlock themes
as parent

21. actionbarsherlock.com
must extend
SherlockActivity
SherlockListActivity
SherlockFragmentActivity
SherlockListFragmentActivity
...

22. actionbarsherlock.com
ruh roh.
roboguice and actionbarsherlock must both extend activity

23. github.com/rtyley/roboguice-sherlock
roboguice-sherlock
combines roboguice and sherlock

24. github.com/rtyley/roboguice-sherlock
public class CarouselActivity extends RoboSherlockFragmentActivity {
@InjectView(id.tpi_header) private TitlePageIndicator indicator;
@InjectView(id.vp_pages) private ViewPager pager;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
super.onCreate(savedInstanceState);
setContentView(R.layout.carousel_view);
pager.setAdapter(new BootstrapPagerAdapter(getResources(), getSupportFragmentManager()));
indicator.setViewPager(pager);
pager.setCurrentItem(1);
}
}

25. github.com/rtyley/roboguice-sherlock

26. kevinsawicki.github.com/http-request/
http-request
A simple convenience library for using a HttpURLConnection to
make requests and access the response.

27. kevinsawicki.github.com/http-request/

28. kevinsawicki.github.com/http-request/

30. kevinsawicki.github.com/http-request/

31. code.google.com/p/google-gson/
gson
a library for working with json

32. code.google.com/p/google-gson/
a pojo
class BagOfPrimitives {
private int value1 = 1;
private String value2 = "abc";
private transient int value3 = 3;
BagOfPrimitives() {
// no-args constructor
}
}
serialization
BagOfPrimitives obj = new BagOfPrimitives();
Gson gson = new Gson();
String json = gson.toJson(obj);
deserialization
BagOfPrimitives obj2 = gson.fromJson(json, BagOfPrimitives.class);

33. code.google.com/p/google-gson/
a pojo
class BagOfPrimitives {
private int value1 = 1;
private String value2 = "abc";
private transient int value3 = 3;
BagOfPrimitives() {
// no-args constructor
}
}
serialization
BagOfPrimitives obj = new BagOfPrimitives();
Gson gson = new Gson();
String json = gson.toJson(obj);
deserialization
BagOfPrimitives obj2 = gson.fromJson(json, BagOfPrimitives.class);

34. code.google.com/p/google-gson/
woohoo! no more manual json parsing

35. code.google.com/p/google-gson/

36. viewpagerindicator.com
view pager indicator

37. viewpagerindicator.com

38. viewpagerindicator.com

39. viewpagerindicator.com

40. code.google.com/p/maven-android-plugin/
android-maven-plugin
an easy to use maven plugin for android

41. <project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>android-bootstrap</artifactId>
<packaging>apk</packaging>
<name>Android Bootstrap app</name>
<url>https://github.com/donnfelker/android-bootstrap</url>
<parent>
<version>1.0</version>
<groupId>com.donnfelker.android.bootstrap</groupId>
<artifactId>android-bootstrap-parent</artifactId>
</parent>
<properties>
<abs.version>4.1.0</abs.version>
</properties>
<dependencies>
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<scope>provided</scope>
<version>${android.version}</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>com.github.rtyley</groupId>
<artifactId>roboguice-sherlock</artifactId>
<version>1.4</version>
</dependency>

42. code.google.com/p/maven-android-plugin/
build process easier to manage

43. code.google.com/p/maven-android-plugin/
resources
google group
ch14 of sonatype book
goo.gl/3Waf5

45. code.google.com/p/maven-android-plugin/

46. fragments android support library

47. download from android sdk

48. code.google.com/p/robotium
“its like selenium, but for android”

49. code.google.com/p/robotium
public class EditorTest extends
ActivityInstrumentationTestCase2<EditorActivity> {
private Solo solo;
public EditorTest() {
super("com.test.editor",
EditorActivity.class);
}
public void setUp() throws Exception {
solo = new Solo(getInstrumentation(), getActivity());
}
public void testPreferenceIsSaved() throws Exception {
solo.sendKey(Solo.MENU);
solo.clickOnText("More");
solo.clickOnText("Preferences");
solo.clickOnText("Edit File Extensions");
Assert.assertTrue(solo.searchText("rtf"));
solo.clickOnText("txt");
solo.clearEditText(2);
solo.enterText(2, "robotium");
solo.clickOnButton("Save");
solo.goBack();
solo.clickOnText("Edit File Extensions");
Assert.assertTrue(solo.searchText("application/robotium"));
}
@Override
public void tearDown() throws Exception {
solo.finishOpenedActivities();
}
}

50. code.google.com/p/robotium

51. androidbootstrap.com

53. androidbootstrap.com
influences github and github gauges
GitHub Gaug.es

54. androidbootstrap.com
includes
roboguice
action bar sherlock
http-request
gson
view pager indicator
robotium
maven
android maven plugin
fragments
api consumption
image downloading
image caching
cache mechanism
pojo support
ahhhhhh yeah
and more...

55. androidbootstrap.com
uses
template for your next project
use as a reference
a how to tutorial
project MVP bootstrap

56. androidbootstrap.com
code

57. Thank You.
questions? tweet @donnfelker