Android TV - Speaker Deck

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DEVELOPING FOR ANDROID TV Efﬁe Barak (@CodingChick)

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Outline 1. What is familiar in developing for the TV 2. What is different (Leanback)

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So what is the same?

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No content

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Basic structure

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Code written for mobile

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Support libraries required Either Glide or Picasso can work, there are implementation differences

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Libraries libraries - All support libraries versions need to be the same. - SQLCipher needs to be 3.3.1-1or higher. Android means all of our favorite libraries just work!

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Application Manifest Changes

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UI differences and Leanback

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Leanback main UI elements: Presenter - Leanback's version of a Recycler Adapter, has onBindViewHolder method and a ViewHolder. Not position-based. PresenterSelector - If there's more then one or more types of Presenters displayed in the same view ArrayObjectAdapter- A generic array that contains everything else.

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Browse page

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The UI elements in Browse ArrayObjectAdapter ListRowPresenter ImageCardView

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MainActivity MainFragment CourseCardPresenter Presenter BrowseFragment Contains Extends Uses Classes Involved in Browse

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UI structure with Udemy Courses

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Hooking up Listeners

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CourseCardPresenter extends Presenter (Is just your everyday adapter)

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The ViewHolder contains ImageCardView

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Course Details

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The UI elements in Course Details DetailsOverviewRowPresenter ClassPresenterSelector ListRowPresenter ImageCardView

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LectureCardPresenter DetailsActivity CourseDetailsFragment DetailsFragment CourseDetailsDescription Presenter AbstractDetailsDescription Presenter Presenter Contains Extends Uses Classes in Details View

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DetailsOverviewRowPresenter is deprecated New class- FullWidthDetailsOverviewRowPresenter with different UI :(

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Details row gets its own Presenter

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Adding Actions to the CourseDetailsRow

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LecturePresenter is similar to CoursePresenter

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Hooking it all up to the ClassPresenterSelector

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Playing a video

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The UI elements in Playback VideoVideo

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The UI elements in Playback ClassPresenterSelector PlaybackControlsRow ListRowPresenter

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Interaction between the Fragment and the Activity Remote control actions PlaybackOverlayActivity PlaybackOverlayFragment Actions on controls Row VideoView Callbacks:

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Setting up VideoView

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The VideoView plays things

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Implementation of MediaSession

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And the callbacks class

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playPause method

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The Actions in the Fragment

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Hooking up the actions listeners

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The actions click listeners invoke the MediaController’s methods

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The controls in the PlaybackControlsRow need to know.

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Voice search

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Voice search

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Searching

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Getting the search query

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Loading the results

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Useful resources: https://github.com/googlesamples/androidtv-Leanback Default auto-generated template https://developer.android.com/training/tv/index.html (Sorta, kinda, maybe)