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
Realm with ContentProvider
Search
Takahiro Shimokawa
April 23, 2015
Programming
8
5.1k
Realm with ContentProvider
I tried to implement realm-java with ContentProvider.
Takahiro Shimokawa
April 23, 2015
Tweet
Share
More Decks by Takahiro Shimokawa
See All by Takahiro Shimokawa
PlayStoreでの新しいユーザー訴求 -LiveOpsの活用とその成果-
androhi
0
2.6k
ConcatAdapterを深掘る
androhi
1
420
Android Studio 4.1推しポイント!
androhi
0
1.3k
一人開発でつまづいたときの処方箋
androhi
0
350
Androidの物理ベースアニメーション
androhi
1
610
ConstraintLayout再入門
androhi
2
3.5k
Firebase Analytics 使用感
androhi
0
900
Support Library v23.2 overview
androhi
0
690
Support Library 総復習
androhi
2
2.5k
Other Decks in Programming
See All in Programming
Is Xcode slowly dying out in 2025?
uetyo
1
190
FormFlow - Build Stunning Multistep Forms
yceruto
1
190
datadog dash 2025 LLM observability for reliability and stability
ivry_presentationmaterials
0
110
来たるべき 8.0 に備えて React 19 新機能と React Router 固有機能の取捨選択とすり合わせを考える
oukayuka
2
850
PHP 8.4の新機能「プロパティフック」から学ぶオブジェクト指向設計とリスコフの置換原則
kentaroutakeda
2
520
技術同人誌をMCP Serverにしてみた
74th
0
340
Go1.25からのGOMAXPROCS
kuro_kurorrr
1
800
地方に住むエンジニアの残酷な現実とキャリア論
ichimichi
5
1.3k
なぜ適用するか、移行して理解するClean Architecture 〜構造を超えて設計を継承する〜 / Why Apply, Migrate and Understand Clean Architecture - Inherit Design Beyond Structure
seike460
PRO
1
690
なぜ「共通化」を考え、失敗を繰り返すのか
rinchoku
1
510
#kanrk08 / 公開版 PicoRubyとマイコンでの自作トレーニング計測装置を用いたワークアウトの理想と現実
bash0c7
1
400
GoのGenericsによるslice操作との付き合い方
syumai
3
690
Featured
See All Featured
Art, The Web, and Tiny UX
lynnandtonic
299
21k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
26k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
Intergalactic Javascript Robots from Outer Space
tanoku
271
27k
Docker and Python
trallard
44
3.4k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
181
53k
Producing Creativity
orderedlist
PRO
346
40k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Visualization
eitanlees
146
16k
Practical Orchestrator
shlominoach
188
11k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
357
30k
Transcript
Realm with ContentProvider Realm meetup #2
About me 4 Լ ܟ߂ (@androhi) 4 גࣜձࣾZaim (AndroidΞϓϦ୲) 4
DroidKaigiͰൃද͠·͢ 4 JellyBeanͱKitKatͰ࣮ݱ͢ΔϚςϦΞϧσβΠϯ
Tried ContentProviderͰΞΫηε͢ΔDBΛɺRealmʹͯ͠Έ·͠ ͨ Reason AndroidͷSyncAdapterΛͬͨࣗಈಉظͷΈͰɺό οΫάϥϯυͰಉظॲཧΛ͢ΔࡍʹContentProviderΛ༻ ͍Δͱ͍͏ϧʔϧ͕͋ΔͨΊ
None
Extend ContentProvider 1. Queryϝιουͷ࣮ (+ ಠࣗCursorͷੜ) 2. Insertϝιουͷ࣮ 3. Updateϝιουͷ࣮
4. Deleteϝιουͷ࣮ 5. BulkInsertϝιουͷ࣮
This time 1. Queryϝιουͷ࣮ (+ ಠࣗCursorͷੜ) 2. Insertϝιουͷ࣮ 3. Updateϝιουͷ࣮
4. Deleteϝιουͷ࣮ 5. BulkInsertϝιουͷ࣮
1-1. Create cursor static final String[] sColumns = new String[]
{"_id", "name", "price"}; RealmQuery<Item> query = mRealm.where(Item.class); RealmResults<Item> results = query.findAll(); MatrixCursor matrixCursor = new MatrixCursor(sColumns); for (Item item : results) { Object[] rowData = new Object[]{item.get_id(), item.getName(), item.getPrice()}; matrixCursor.addRow(rowData); }
1-2. Implement query @Override public Cursor query(Uri uri, String[] projection,
String selection, String[] selectionArgs, String sortOrder) { ... RealmQuery<Item> query = mRealm.where(Item.class); RealmResults<Item> results = query.findAll(); MatrixCursor matrixCursor = new MatrixCursor(sColumns); for (Item item : results) { Object[] rowData = new Object[]{item.get_id(), item.getName(), item.getPrice()}; matrixCursor.addRow(rowData); } return matrixCursor; }
2. Implement insert @Override public Uri insert(Uri uri, ContentValues contentValues)
{ ... mRealm.beginTransaction(); Item item = mRealm.createObject(Item.class); item.set_id(++count); item.setName(contentValues.getAsString(sColumns[1])); item.setPrice(contentValues.getAsLong(sColumns[2])); mRealm.commitTransaction(); return Uri.withAppendedPath(uri, String.valueOf(item.get_id())); }
5. Implement bulkInsert @Override public int bulkInsert(Uri uri, ContentValues[] values)
{ ... mRealm.beginTransaction(); try { for (ContentValues value : values) { Item item = mRealm.createObject(Item.class); item.set_id(value.getAsLong(sColumns[0])); item.setName(value.getAsString(sColumns[1])); item.setPrice(value.getAsLong(sColumns[2])); } } finally { mRealm.commitTransaction(); } return values.length; }
compare with SQLite Query/Insert -> 10,000݅ Xperia Z1f (Android 4.4.2)
SQLite with ContentProvider 4 Insertɺ͔ͳΓ͍ 4 Query͕ૣ͍
Realm with ContentProvider 4 Insert͕ɺͦΜͳʹ͘ͳ͍ 4 Query͕SQLiteʹൺΔͱ͍ ʢCursorੜͷӨڹʣ 4 BulkInsertޓ֯ʁ
None
None
None
Summary 4 ύϑΥʔϚϯεམͪΔʢʁʣ͚ͲContentProviderͰ ͑Δ 4 Queryϝιουվળͷ༨͕͋Γͦ͏ 4 ࣗಈಉظ͚ͩContentProviderܦ༝ʹ͠ɺΞϓϦຊମ RealmΛͦͷ··͏ͷ͕ྑͦ͞͏