[Android]realm 적용하기

private static final int DATABASE_VERSION = 42;
private static final String DATABASE_NAME = "파일이름.realm";
 
private volatile static RealmHelper instance;
private RealmHelper() {}
public static RealmHelper getInstance() {    
    if (instance == null) {        
        synchronized (RealmHelper.class) {            
            if (instance == null) {                
                instance = new RealmHelper();            
            } 
        }    
    }    
    return instance;
}
 
private Realm realm;
 
private void openRealm() {    
    RealmConfiguration config = new RealmConfiguration.Builder(FlittoApplication.context)
                                    .name(DATABASE_NAME)            
                                    .schemaVersion(DATABASE_VERSION)            
                                    .deleteRealmIfMigrationNeeded()            
                                    .build();    
    realm = Realm.getInstance(config);
}

DB object를 만들 때는, 

public class DBLangSet extends RealmObject {    
private String key;    
private String content;    
 
public String getKey() {        
    return key;    
}    
 
public void setKey(String key) {        
    this.key = key;    
}    
 
public String getContent() {        
    return content;    
}    
 
public void setContent(String content) {        
    this.content = content;    
}
 
}

RealmObject 를 반드시 상속 시켜줘야 합니다.