Android Bootstrap - Speaker Deck

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Android Development with android bootstrap bootstrapping

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DONN FELKER [email protected] @donnfelker gplus.to/donnfelker

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Groupon MyFitnessPal GetHuman Fitness+3 Travel WODs QONQR ... and over 50 more Android apps

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loose agenda what is android bootstrap? why was it built? lots of demos libraries & examples questions

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What is Android Bootstrap?

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A collection of libraries and frameworks integrated together in a easy to use application that can serve as a boilerplate or reference for existing or future Android apps.

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http api consumption dependency injection pojos instead of raw json message bus fragments navigation drawer action bar testing responsive layout backwards compatibility boilerplate for new projects

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Why was Android Bootstrap built?

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new client! new project!

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reuse old code

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this week!

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it worked. but it was demoralizing.

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Boilerplate. Bootstrap. MVP. I needed to

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Goal Build More With Less

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Pay with Square GitHub Gaug.es

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How do we get there?

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tons of integration work tons of open source

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open source used dagger app compat navigation drawer otto http-request gson view pager indicator robotium gradle fragments parse.com

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android bootstrap demo

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download the app from search for “android bootstrap”

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App Architecture

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Parse.com datastore & REST endpoint (MongoDB in the cloud) app requests data parse REST API returns JSON data

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Views Activities Service Layer Event Bus Repository Layer POJOS JSON parse Dependency Injection API consumption through HTTP Otto Dagger & Butterknife GSON Fragments (http-request)

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UI & UX Used in Android Bootstrap Navigation Drawer Action Bar View Page Indicator

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Picasso ListView Images are loaded via Picasso from Gravatar square.github.io/picasso/

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Fragments & Responsive Aware Layout Handset Tablet

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Background Service Timer Activity is updated from background service. Timer will continue to run in background. Use notiﬁcation to go back to the activity. Timer is updated and looks like its running at all times.

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Background Service Architecture Android Activity Event Bus Background Service Android Notiﬁcations

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ANDROID BOOTSTRAP HAS A LOT GOING ON

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GOOD

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Overview of Libraries

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square.github.io/dagger/

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ActionBar with AppCompat actionbarsherlock.com

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Pay with Square GitHub Gaug.es

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screenshot: actionbarsherlock.com

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usage getSupportActionBar() MenuItemCompat supports theming must use AppCompat themes as parent

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must extend ActionBarActivity actionbarsherlock.com gotchas No PreferenceActivity Support

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AppCompat demo

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Navigation Drawer

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DrawerLayout & Fragments/Views

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navigation drawer demo

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Otto An enhanced Guava-based event bus with emphasis on Android support.

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Publish an event bus.post(new AnswerAvailableEvent(42)); @Subscribe public void answerAvailable(AnswerAvailableEvent event) { // TODO: React to the event somehow! } Subscribing to the event

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Use Cases Activity / Fragment Communication Service / Fragment / Activity Communication Basic Message Passing between objects in scope Excellent Message Bus

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Publish an event FROM A FRAGMENT bus.post(new AnswerAvailableEvent(42)); @Subscribe public void answerAvailable(AnswerAvailableEvent event) { // TODO: React to the event somehow! } Subscribing to the event FROM A ACTIVITY

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usage include library via libs, maven or gradle // Register in onResume() bus.register(this); // Unregister in onPause() bus.unregister(this); // in onPause @Provides bus.post(event); @Subscribe

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Otto demo

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square.github.io/otto/

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

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kevinsawicki.github.com/http-request/

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kevinsawicki.github.com/http-request/

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kevinsawicki.github.com/http-request/

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

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

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

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

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REST API

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api consumption demo

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a fast dependency injector for Android and Java http://square.github.io/dagger/

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Why is it so fast? - Compile Time Validation - Compile Time Code Generation

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http://square.github.io/dagger/

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User Interface Service Layer Repository Layer what if I a particular dependency down here that depends on context? service layer: goo.gl/7NQVZ repository/persistence layer: goo.gl/j5u74 http://square.github.io/dagger/ Traditional IoC/DI Diagram

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Dependencies in the UserListFragment

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http://square.github.io/dagger/

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dagger demo http://square.github.io/dagger/

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view pager indicator viewpagerindicator.com

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viewpagerindicator.com

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viewpagerindicator.com

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viewpagerindicator.com

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gradle

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build process easier to manage

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gradle ﬁles demo

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resources Gradle Plugin User Guide http://tools.android.com/tech-docs/new-build-system/user-guide youtube.com/watch?v=LCJAgPkpmR0 IO 2013 -Android Gradle Plugin Intro Docs

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

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public class EditorTest extends ActivityInstrumentationTestCase2 { 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(); } } code.google.com/p/robotium

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code.google.com/p/robotium

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androidbootstrap.com

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Generate Your Next Project Gradle - Android Studio - AppCompat - NavigationDrawer Maven - IntelliJ - ActionBarSherlock - SlidingMenu androidbootstrap.com alpha.androidbootstrap.com USE THIS ONE

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androidbootstrap.com includes dagger otto action bar sherlock or app compat http-request gson view pager indicator robotium maven or gradle fragments api consumption image downloading image caching cache mechanism pojo support and much more... ahhhhhh yeah

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

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Thank You. DONN FELKER [email protected] @donnfelker gplus.to/donnfelker