Building More with Less

building

More With Less
with android bootstrap

Wednesday, February 6, 13

@donnfelker


Building More With Less


agenda

open source
libraries
examples
bootstrap


Pay with Square GitHub Gaug.es


tons of open source

tons of integration work


open source

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


roboguice.org

roboguice
dependency injection
for android


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 );
}
}


roboguice.org

User Interface

Service Layer
ng
ee d a stri
at if I n ?
wh
do wn here
r esource
Persistence Layer

service layer: goo.gl/7NQVZ persistence layer: goo.gl/j5u74

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
}
}


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
}
}


roboguice.org

must extend

RoboActivity
RoboListActivity
RoboFragmentActivity
RoboListFragmentActivity
...


roboguice.org


actionbarsherlock.com

action bar sherlock
action bar support for pre 3.x



Pay with Square GitHub Gaug.es



usage

getSupportActionBar()

native calls

supports theming

must use Sherlock themes
as parent



must extend

SherlockActivity
SherlockListActivity
SherlockFragmentActivity
SherlockListFragmentActivity
...



ruh roh.
roboguice and actionbarsherlock must both extend activity


github.com/rtyley/roboguice-sherlock

roboguice-sherlock
combines roboguice and 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);

}

}


kevinsawicki.github.com/http-request/

http-request
A simple convenience library for using a HttpURLConnection to make requests and
access the response.


kevinsawicki.github.com/http-request/


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

gson
a library for working with json


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);



woohoo! no more manual json parsing


viewpagerindicator.com



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

android-maven-plugin
an easy to use maven plugin for android


<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>


</dependency>

<dependency>

<groupId>com.github.rtyley</groupId>

<artifactId>roboguice-‐sherlock</artifactId>


</dependency>

...

<dependency>

<groupId>com.github.kevinsawicki</groupId>

<artifactId>wishlist</artifactId>


<type>apklib</type>

</dependency>

<dependency>


build process easier to manage



resources

google group

ch14 of sonatype book
goo.gl/3Waf5 (sample next)


fragments android support library


download from android sdk


code.google.com/p/robotium

“its like selenium, but for android”


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();
}
}


androidbootstrap.com



inﬂuences are from github and gaug.es

GitHub Gaug.es


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


uses

template for your next project
use as a reference
a how to tutorial
project MVP bootstrap



q&a


Thank You.
questions? tweet @donnfelker


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