Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Androidでオーディオアプリを作るということ
Search
rmakiyama
September 26, 2020
Technology
1
3.3k
Androidでオーディオアプリを作るということ
Androidでオーディオアプリを作るときに考慮すべきところなどを簡単に。
rmakiyama
September 26, 2020
Tweet
Share
More Decks by rmakiyama
See All by rmakiyama
UI State設計とテスト方針
rmakiyama
4
1.1k
KMPプロジェクトでマニュアルDIを使う選択
rmakiyama
0
400
Jetpack Composeとデザインシステム
rmakiyama
0
1k
TextField theme in Compose
rmakiyama
0
300
Androidエンジニアが1人という不安と向き合う
rmakiyama
6
6.8k
Jetpack Compose Canvas入門
rmakiyama
0
1.5k
HiltはDIをどうやってやっているのか
rmakiyama
1
280
Radiotalk Androidアプリにおけるモジュール分割の課題とこれから
rmakiyama
1
320
getChangePayload in DiffUtil
rmakiyama
0
3.2k
Other Decks in Technology
See All in Technology
ここ一年のCCoEとしてのAWSコスト最適化を振り返る / CCoE AWS Cost Optimization devio2025
masahirokawahara
1
1.4k
【 LLMエンジニアがヒューマノイド開発に挑んでみた 】 - 第104回 Machine Learning 15minutes! Hybrid
soneo1127
0
280
AWS環境のリソース調査を Claude Code で効率化 / aws investigate with cc devio2025
masahirokawahara
2
1.2k
クラウドセキュリティを支える技術と運用の最前線 / Cutting-edge Technologies and Operations Supporting Cloud Security
yuj1osm
2
270
オブザーバビリティが広げる AIOps の世界 / The World of AIOps Expanded by Observability
aoto
PRO
0
300
iPhone Eye Tracking機能から学ぶやさしいアクセシビリティ
fujiyamaorange
0
610
落ちる 落ちるよ サーバーは落ちる
suehiromasatoshi
0
140
LLMを搭載したプロダクトの品質保証の模索と学び
qa
0
480
絶対に失敗できないキャンペーンページの高速かつ安全な開発、WINTICKET × microCMS の開発事例
microcms
0
390
ZOZOマッチのアーキテクチャと技術構成
zozotech
PRO
3
1.3k
BPaaSにおける人と協働する前提のAIエージェント-AWS登壇資料
kentarofujii
0
120
【初心者向け】ローカルLLMの色々な動かし方まとめ
aratako
7
3.1k
Featured
See All Featured
Stop Working from a Prison Cell
hatefulcrawdad
271
21k
Gamification - CAS2011
davidbonilla
81
5.4k
Agile that works and the tools we love
rasmusluckow
330
21k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
The Invisible Side of Design
smashingmag
301
51k
Why You Should Never Use an ORM
jnunemaker
PRO
59
9.5k
StorybookのUI Testing Handbookを読んだ
zakiyama
31
6.1k
Automating Front-end Workflow
addyosmani
1370
200k
The Art of Programming - Codeland 2020
erikaheidi
55
13k
Writing Fast Ruby
sferik
628
62k
What’s in a name? Adding method to the madness
productmarketing
PRO
23
3.6k
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
358
30k
Transcript
"OESPJEͰ ΦʔσΟΦΞϓϦΛ ࡞Δͱ͍͏͜ͱ Zli x ΤΩαΠτ ߹ಉLT 2020/09/26 ryo makiyama
ɹɹࣗݾհ •ࢁྎ •Radiotalkגࣜձࣾ •AndroidΤϯδχΞ • @_rmakiyama • rmakiyama
ԻΛ࠶ੜ͢Δ
ԻΛ࠶ੜ͢Δʹʁ • AudioTrack • SoundPool • MediaPlayer • ExoPlayer •
etc…
ԻΛ࠶ੜ͢Δʹʁ • AudioTrack • ੜͷԻσʔλΛѻ͑Δ • ࠷Ԇ͕গͳ͍ • ѻ͍͕͍͠… •
SoundPool • ͍Իʹద͍ͯ͠Δ • ޮՌԻͳͲ • ෛՙ͕͍ • Ԇ͕গͳ͍
ԻΛ࠶ੜ͢Δʹʁ • MediaPlayer • ࠷Ұൠత • ө૾ʹରԠ • ѻ͍͕؆୯ •
HLSະରԠ • ExoPlayer • GoogleͷϥΠϒϥϦ • ө૾ʹରԠ • ΧελϚΠζੑ͕ߴ͍ • HLSDASHʹରԠ
ExoPlayer val audioUri = Uri.parse(“https:"//sample.jp/media/media1.mp3”) val player = SimpleExoPlayer.Builder(context).build() val
sourceFactory = DefaultDataSourceFactory( context, Util.getUserAgent(context, "sample") ) val extractorsFactory = DefaultExtractorsFactory() val source = ProgressiveMediaSource.Factory(sourceFactory, extractorsFactory) .createMediaSource(audioUri) player.prepare(source)
؆୯
؆୯
ΦʔσΟΦΞϓϦʹٻΊΒΕΔ͜ͱ • όοΫάϥϯυͰ࠶ੜͰ͖Δ • ΠϠϗϯ͕ൈ͚ͨΒԻ͕ࢭ·Δ • ผͷΞϓϦͰԻΛ࠶ੜ͢Δͱఀࢭ͢Δ • ༷ʑͳσόΠε͔Βૢ࡞͕Ͱ͖Δ •
etc…
Ͳ͏ͬͯͬͯΔͷ
ΦʔσΟΦΞϓϦʹٻΊΒΕΔ͜ͱ • όοΫάϥϯυͰ࠶ੜͰ͖Δ • ΠϠϗϯ͕ൈ͚ͨΒԻ͕ࢭ·Δ • ผͷΞϓϦͰԻΛ࠶ੜ͢Δͱఀࢭ͢Δ • ༷ʑͳσόΠε͔Βૢ࡞͕Ͱ͖Δ •
etc… AndroidͷServiceΛར༻͢Δ
ΦʔσΟΦΞϓϦʹٻΊΒΕΔ͜ͱ • όοΫάϥϯυͰ࠶ੜͰ͖Δ • ΠϠϗϯ͕ൈ͚ͨΒԻ͕ࢭ·Δ • ผͷΞϓϦͰԻΛ࠶ੜ͢Δͱఀࢭ͢Δ • ༷ʑͳσόΠε͔Βૢ࡞͕Ͱ͖Δ •
etc… ExoPlayerઌੜ͕ͬͯ͘ΕΔ
ΦʔσΟΦΞϓϦʹٻΊΒΕΔ͜ͱ • όοΫάϥϯυͰ࠶ੜͰ͖Δ • ΠϠϗϯ͕ൈ͚ͨΒԻ͕ࢭ·Δ • ผͷΞϓϦͰԻΛ࠶ੜ͢Δͱఀࢭ͢Δ • ༷ʑͳσόΠε͔Βૢ࡞͕Ͱ͖Δ •
etc…
headset watch tv auto
༷ʑͳσόΠε͔Β ૢ࡞͞ΕΔ͜ͱΛ ఆ͢Δඞཁ͕͋Δ
ΦʔσΟΦΞϓϦͷਪΞʔΩςΫνϟ • ΫϥΠΞϯτ/αʔόʔઃܭ • ϝσΟΞίϯτϩʔϥʔ(ΫϥΠΞϯτ) • ϝσΟΞηογϣϯ(αʔόʔ) • UIʹΑΔૢ࡞ͱ ίϯςϯπใɾϓϨΠϠʔૢ࡞Λ͚ͨ
ref. https:"//developer.android.com/guide/topics/media-apps/media-apps-overview
UI/ϝσΟΞίϯτϩʔϥʔ(ΫϥΠΞϯτ) • UIίϯτϩʔϥʔͷΈͱΓͱΓ • ϓϨΠϠʔࣗମͱΓऔΓΛ͠ͳ͍ • ΞΫγϣϯηογϣϯͷίʔϧόοΫʹ • ۂใͷมߋͳͲηογϣϯ͔Β ίϯτϩʔϥʔ͕ίʔϧόοΫܗࣜͰड͚औΔ
ϝσΟΞηογϣϯ/ϓϨΠϠʔ(αʔόʔ) • 1ͭͷηογϣϯͰෳͷίϯτϩʔϥʔ͔Β ίʔϧόοΫΛड͚Δ͜ͱ͕Ͱ͖Δ • ϓϨΠϠʔηογϣϯ͔ΒͷΈૢ࡞͞ΕΔ • ίϯτϩʔϥʔ͔ΒͷίʔϧόοΫʹΑΓૢ࡞
ΦʔσΟΦΞϓϦ֓ཁ ref. https:"//developer.android.com/guide/topics/media-apps/media-apps-overview controller session player ui devices/controller
࣮ฤ%
ΦʔσΟΦΞϓϦ֓ཁʢ࣮دΓʣ ref. https:"//developer.android.com/guide/topics/media-apps/media-apps-overview
MediaBrowserService(session/player) class MyMediaService : MediaBrowserServiceCompat() { private lateinit var mediaSession:
MediaSessionCompat private lateinit var player: Player override fun onCreate() { super.onCreate() mediaSession = MediaSessionCompat(this, "MyMediaService").apply { … setCallback(myCallback) ɹɹɹɹɹɹ …
MediaBrowserService(session/player) override fun onCreate() { … } private val myCallback
= object : MediaSessionCompat.Callback() { override fun onPrepare() {} override fun onPlay() {} override fun onPause() {} override fun onStop() {} … }
MediaBrowserService(session/player) … override fun onGetRoot( clientPackageName: String, clientUid: Int, rootHints:
Bundle? ): BrowserRoot? { "// ଓ͞ΕͨΫϥΠΞϯτͷݕূΛ͢Δ "// ଓΛڋ൱͢Δͱ͖nullΛฦ͢ return BrowserRoot("root", null) }
MediaBrowserService(session/player) … override fun onLoadChildren( parentId: String, result: Result<MutableList<MediaBrowserCompat.MediaItem">> )
{ "// ΫϥΠΞϯτʹϝσΟΞͷϦετΛฦ͢ val list = getMetadata() result.sendResult(list) } …
Activity(UI/controller) class MediaPlayerActivity : AppCompatActivity() { private lateinit var mediaBrowser:
MediaBrowserCompat private lateinit var mediaController: MediaControllerCompat override fun onCreate(savedInstanceState: Bundle?) { … mediaBrowser = MediaBrowserCompat( this, ComponentName(this, MyMediaService"::class.java), connectionCallbacks, null
Activity(UI/controller) class MediaPlayerActivity : AppCompatActivity() { private lateinit var mediaBrowser:
MediaBrowserCompat private lateinit var mediaController: MediaControllerCompat override fun onCreate(savedInstanceState: Bundle?) { … } override fun onStart() { super.onStart() "// MediaBrowserServiceʹଓ mediaBrowser.connect()
Activity(UI/controller) class MediaPlayerActivity : AppCompatActivity() { … private lateinit var
mediaController: MediaControllerCompat … private val connectionCallbacks = object : MediaBrowserCompat.ConnectionCallback() { override fun onConnected() { "// sessionͷτʔΫϯ͔ΒcontrollerΛੜ mediaController = MediaControllerCompat(this@MediaPlayerActivity, mediaBrowser.sessionToken) .apply { registerCallback(controllerCallback) } "// UIͷૢ࡞ʹԠͯ͡controllerΛհͯ͠ΦʔσΟΦΛૢ࡞ "// ྫ) ࠶ੜɿmediaController.transportControls.play()
Activity(UI/controller) class MediaPlayerActivity : AppCompatActivity() { … private var controllerCallback
= object : MediaControllerCompat.Callback() { override fun onMetadataChanged(metadata: MediaMetadataCompat?) { "// ࠶ੜதͷίϯςϯπใͷมԽʹԠͯ͡UIΛߋ৽ } override fun onPlaybackStateChanged(state: PlaybackStateCompat?) { "// ࠶ੜͷঢ়ଶ(࠶ੜதఀࢭ)ͷมԽʹԠͯ͡UIΛߋ৽͢Δ } }
શʹཧղͨ͠ʁ
·ͱΊ •ԻΛ࠶ੜ͢Δ͚ͩͳΒ؆୯ʂ& •ΦʔσΟΦΞϓϦͰߟྀ͢Δ͜ͱҙ֎ͱଟ͍ • ࠓ͍ͯ͠ͳ͍͜ͱͨ͘͞Μ͋Δ…ʂ •ڵຯ͕༙͍ͨΒ࡞ͬͯΈΑ͏ʂ' • खΛಈ͔͢ͷେࣄʂ%