Realm for Android

Realm for Android

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#potatotips 10

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1. Realm for Android
   potatotips #10
   CyberAgent, Inc.
   ߱໼ େ஍
   

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2. About Me
   Wasabeef (D.Furiya)
   @wasabeef_jp
   wasabeef
   http://wasabeef.jp
   

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3. Realm
   SQLiteΛஔ͖׵͑Δ໨తͰ࡞ΒΕͨ
   Mobile DataBase
   

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4. Prerequisites
   • SDK >= Android 2.3 (9)
   • Android Studio >= 0.8.6
   • JDK version >= 7
   

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5. ग़యɿhttp://realm.io/news/realm-for-android
   

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6. ग़యɿhttp://realm.io/news/realm-for-android
   

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7. ग़యɿhttp://realm.io/news/realm-for-android
   

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8. Ͳ͏΍Β଎͍Β͍͠
   

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9. Setup
   compile 'io.realm:realm-android:0.71.+'
   

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10. Models
    public class User extends RealmObject {
    private String name;
    private int age;
    !
    @Ignore
    private int sessionId;
    !
    // Standard getters & setters generated by your IDE…
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public int getAge() { return age; }
    public void setAge(int age) { this.age = age; }
    public int getSessionId() { return sessionId; }
    public void setSessionId(int sessionId) {
    this.sessionId = sessionId;
    }
    }
    

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11. Writes
    // Obtain a Realm instance
    Realm realm = Realm.getInstance(this, "wasabeef.realm");
    !
    realm.beginTransaction();
    !
    // Create a new object
    User user = realm.createObject(User.class);
    user.setName("Wasabeef");
    user.setEmail(“chip@wasabeef.jp");
    !
    realm.commitTransaction();
    

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12. Queries
    !
    // Build the query looking at all users:
    RealmQuery query = realm.where(User.class);
    !
    // Add query conditions:
    query.equalTo("name", "Wasabeef");
    query.or().equalTo(“name”, "Chip");
    // Execute the query:
    RealmResults resultAll = query.findAll();
    !
    // Or alternatively do the same all at once (the "Fluent interface"):
    RealmResults result =
    realm.where(User.class)
    .equalTo("name", "Wasabeef")
    .or()
    .equalTo("name", "Chip")
    .findAll();
    

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13. Sorting
    !
    // Query
    RealmResults result = realm.where(User.class).findAll();
    !
    // Asc
    RealmResults sortedAscending = result.sort(“age");
    !
    // Desc
    RealmResults sortedDescending =
    result.sort("age", RealmResults.SORT_ORDER_DECENDING);
    

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14. Deletion
    !
    // All changes to data must happen in a transaction
    realm.beginTransaction();
    !
    // remove single match
    result.remove(0);
    result.removeLast();
    !
    // Delete all matches
    result.clear();
    !
    realm.commitTransaction()
    

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15. RealmObject & RealmResults
    ThreadؒͰͷड͚౉͠ͷ૝ఆ͸ͯ͠ͳ͍ͷͰ
    Realm.getInstance()ͱRealmQuery()
    Λ௨ͯ͠࠶औಘ͢Δඞཁ͕͋Δ
    

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16. Migration
    !
    RealmMigration…………
    !
    ActiveAndroidͱ͔SugarORMͱ͔ͱ
    ൺ΂ͯ͸͍͚ͳ͍…
    !
    ࣗ෼ͰTableͷ࠶ߏஙͷॲཧΛॻ͔ͳ͍ͱ…
    

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17. ๊͑ͯΔ໰୊఺
    1. Setter/Getter͔͠ॻ͚ͳ͍
    2. ENUM͸Supportͯ͠ͳ͍
    3. RealmObjectΛGSONͰSerializeग़དྷͳ͍
    4. Migration͕Πέͯͳ͍
    

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18. Latest 0.71.0 (2014.10.22)
    

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19. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ɻ
    

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