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
620
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
顧客の画像データをテラバイト単位で配信する 画像サーバを WebP にした際に起こった課題と その対応策 ~継続的な取り組みを添えて~
takutakahashi
4
1.4k
バイブコーディング超えてバイブデプロイ〜CloudflareMCPで実現する、未来のアプリケーションデリバリー〜
azukiazusa1
2
710
Hack Claude Code with Claude Code
choplin
8
2.8k
ZeroETLで始めるDynamoDBとS3の連携
afooooil
0
120
レトロゲームから学ぶ通信技術の歴史
kimkim0106
0
130
AI Ramen Fight
yusukebe
0
110
Vibe Codingの幻想を超えて-生成AIを現場で使えるようにするまでの泥臭い話.ai
fumiyakume
18
9.3k
ソフトウェア設計とAI技術の活用
masuda220
PRO
25
6.8k
Rails Frontend Evolution: It Was a Setup All Along
skryukov
0
330
AWS Summit Japan 2024と2025の比較/はじめてのKiro、今あなたは岐路に立つ
satoshi256kbyte
1
250
フロントエンドのパフォーマンスチューニング
koukimiura
6
2.3k
0から始めるモジュラーモノリス-クリーンなモノリスを目指して
sushi0120
0
110
Featured
See All Featured
How to Think Like a Performance Engineer
csswizardry
25
1.8k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Done Done
chrislema
184
16k
Gamification - CAS2011
davidbonilla
81
5.4k
Java REST API Framework Comparison - PWX 2021
mraible
31
8.7k
Why Our Code Smells
bkeepers
PRO
337
57k
Adopting Sorbet at Scale
ufuk
77
9.5k
Art, The Web, and Tiny UX
lynnandtonic
301
21k
We Have a Design System, Now What?
morganepeng
53
7.7k
Visualization
eitanlees
146
16k
Building Flexible Design Systems
yeseniaperezcruz
328
39k
Optimising Largest Contentful Paint
csswizardry
37
3.3k
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