Lock in $30 Savings on PRO—Offer Ends Soon! ⏳
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Android EPUB 로딩 개선
Search
RIDI
August 03, 2018
Technology
3
500
Android EPUB 로딩 개선
RIDI
August 03, 2018
Tweet
Share
More Decks by RIDI
See All by RIDI
원격 근무 팀 운영 경험 공유
ridi
0
2.2k
SVG Icon Design Guide
ridi
2
4k
빠르게 훑어보는 리디페이 백엔드 개발기
ridi
2
5.1k
Next.js는 정말 zero config였다.
ridi
0
2.1k
3일 걸릴 것 같던 구매목록 다운로드는 왜 3주가 걸렸을까?
ridi
0
460
원격으로 한 달 일해보니
ridi
0
1.5k
리디북스 앱에 S Pen Remote 연동하기
ridi
2
2.8k
UI 라이브러리 개발기
ridi
1
2.7k
테스트 환경 개선하기
ridi
8
3.6k
Other Decks in Technology
See All in Technology
100以上の新規コネクタ提供を可能にしたアーキテクチャ
ooyukioo
0
240
ESXi のAIOps だ!2025冬
unnowataru
0
300
Oracle Database@Azure:サービス概要のご紹介
oracle4engineer
PRO
2
190
Agent Skillsがハーネスの垣根を超える日
gotalab555
6
3.8k
MariaDB Connector/C のcaching_sha2_passwordプラグインの仕様について
boro1234
0
1k
Amazon Bedrock Knowledge Bases × メタデータ活用で実現する検証可能な RAG 設計
tomoaki25
6
2.2k
Strands AgentsとNova 2 SonicでS2Sを実践してみた
yama3133
1
1.6k
Bedrock AgentCore Memoryの新機能 (Episode) を試してみた / try Bedrock AgentCore Memory Episodic functionarity
hoshi7_n
2
1.7k
AIエージェント開発と活用を加速するワークフロー自動生成への挑戦
shibuiwilliam
4
810
20251219 OpenIDファウンデーション・ジャパン紹介 / OpenID Foundation Japan Intro
oidfj
0
450
普段使ってるClaude Skillsの紹介(by Notebooklm)
zerebom
8
2k
たまに起きる外部サービスの障害に備えたり備えなかったりする話
egmc
0
390
Featured
See All Featured
Highjacked: Video Game Concept Design
rkendrick25
PRO
0
240
How to Think Like a Performance Engineer
csswizardry
28
2.4k
16th Malabo Montpellier Forum Presentation
akademiya2063
PRO
0
25
YesSQL, Process and Tooling at Scale
rocio
174
15k
Why Our Code Smells
bkeepers
PRO
340
57k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
32
2.8k
The #1 spot is gone: here's how to win anyway
tamaranovitovic
1
860
Digital Ethics as a Driver of Design Innovation
axbom
PRO
0
130
Paper Plane
katiecoart
PRO
0
44k
Money Talks: Using Revenue to Get Sh*t Done
nikkihalliwell
0
120
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
4.1k
Un-Boring Meetings
codingconduct
0
160
Transcript
Android EPUB ۽٬ ѐࢶ ࠭য ষੋ
None
ࢲীࢲ ଼ਸ ҳݒ জীࢲ ۽٘ ੍ח
ࢲীࢲ ଼ਸ ҳݒ জীࢲ ۽٘ ੍ח EPUBী Ѧܽ DRMਸ ೧ઁೞҊ
ਬബೞ ঋ ੌ ա ഛੋೞҊ ୷ ಽҊ ஶబஎ Ҋ द DRM ਊೞҊ ਗࠄ Ҋ …
EPUB ۽٬ җ 1. DRM Ѧ۰ח EPUB ۽٘
EPUB ۽٬ җ 2. EPUBী Ѧ۰ח DRM ೧ઁ
EPUB ۽٬ җ ≈
EPUB ۽٬ җ 3. ୷೧ઁ ߂ ਗࠄ EPUB ઁѢ
EPUB ۽٬ җ 4. ஶబஎ ੌী DRM ਊ
Ӓؘ۠..
DRM ೧ઁ ػ EPUBੌ ੌदਵ۽ ઓ EPUB ୷ ೧ઁ, ঐഐച
স ب ъઁ ઙܐ द ਗࠄੌ ֢
ਗࠄ ੌ Ӓ۽ ࠁৈҊ DRM Ѧܻ ঋ EPUB ࠄޙ
HTML ੌ ӝఋ..
যځೠ ࢚ടীࢲب ঐഐച غ ঋ ੌ ࠁৈઉࢲח উػ
рী ੌ ֢غחѱ ޙઁۄݶ? ਸ ೞ݈!
DRM ೧ઁ ୷ ೧ઁ బஎ DRM ਊ
1. EPUB ੌਸ ೞ ঋҊ ߄۽ ঐഐചೞ ࢎন ӝӝীࢲ ࠛоמೣ
(ࢲ ӝળ о EPUB : 493MB)
=
2. ܴਸ о ࠙ೡ ୷ੌਸ ࢎਊೞ Zip Headerܳ ా೧
ࣽࢲ ਬ୶ оמ 1. DRM ೧ઁೠ EPUB ੌਸ ೞ ঋҊ ߄۽ ঐഐചೞ
1/n 1/n 1/n 1/n j EPUB (n byte)
Sequence InputStream j Input Stream Input Stream Input Stream Input
Stream
3. Zip ੌ ইצ Ӓր ੌਸ ࢎਊೞ ੌ ࢤࢿदрਸ ా೧
ࣽࢲ ਬ୶ оמ 2. ܴਸ о ࠙ೡ ୷ੌਸ ࢎਊೞ 1. DRM ೧ઁೠ EPUB ੌਸ ೞ ঋҊ ߄۽ ঐഐചೞ
1 2 3 … 1 3 2 …
4. Random Access Fileਸ ࢎਊೞ ࢿҕ 3. Zip ੌ ইצ
Ӓր ੌਸ ࢎਊೞ 2. ܴਸ о ࠙ೡ ୷ੌਸ ࢎਊೞ 1. DRM ೧ઁೠ EPUB ੌਸ ೞ ঋҊ ߄۽ ঐഐചೞ
ਵݶ જওѷ݅..
ঐഐച ೡ ੌ ࢶఖ ӝળ ӏधਸ ాೠ DRMਊ
opf ݾ۾ী ח ੌٜਸ ঐഐച
opf ݾ۾ী ח ੌٜਸ ঐഐച ୷ਸ ݢ ಽҊ ঐഐച
೮ӝ ٸޙী opf ࢎਊ оמ ӏधਵ۽ ഛܳ ೧ࢲ ঐഐച e.g. *.html, *.xhtml
୷ਸ ݢ ಽҊ ঐഐച ೮ӝ ٸޙী opf ࢎਊ оמ
-> ਃೠ ੌਸ ই ݢ ୷ਸ ಽ InputStream ZipArchiveInputStream ZipArchiveEntry
ਊ EPUB ܻ opfܳ ాೠ Ѩࢎ ޙઁ
୷ ಽ ٸ݃ opfীࢲ ୶ೠ ݾ۾җ ࠺Ү ݾ۾ ݽٚ ੌਸ
୷ ಽਵݶ աݠח ߄۽ ೯ೞ -> ࠺ ஶబஎ ੌ ݆ EPUB ਊ ఀ
None
୷ਸ ಽݶࢲ زदী ঐഐച Disk I/Oо যٝ
աݠח ߄۽ ୷೧ઁ ਃೠ ੌ݅ ࢶఖೞৈ ঐഐച
PAPER PRO ୭ୡ ۽٬दр 0 150 300 450 600 15MB
50MB 200MB 500MB ߸҃ ߸҃ റ दр (ୡ) 60%
ખ ؊ җਸ উೞѱ উೞҊ ࡅܰѱ!
য় Ѧ যڌѱ ೞ? য় Ѥ যڌѱೞ? য় Ѧ যڌѱ
೮?
Android 3ਘ PAPER 4ਘ PAPER PRO 5ਘ THE END
Q&A