Comment fermer et rouvrir la base de données Sqlite?

Question

Dans mon application, je gère la sauvegarde et la restauration du fichier Sqlite db.

Je dois fermer et rouvrir ma connexion à la base de données après la restauration. Comment puis-je faire ceci?

Answer 1

SQLite Database class a des méthodes d'ouverture et de fermeture.

Answer 2

Ce code peut vous aider.

public class DbHelper { 
    private static final String DATABASE_NAME = "rayyildiz_sample.db"; 
    private static final int DATABASE_VERSION = 1; 
    private static final String TABLE_NAME = "Test"; 
    private static final String TABLE_CREATE = "CREATE TABLE " + TABLE_NAME + " (" 
     + " \"Id\" INTEGER PRIMARY KEY," 
     + " \"Firstname\" TEXT," 
     + " \"Lastname\" TEXT," 
     + " \"PhoneNumber\" TEXT" + ")"; 
    private static final String TABLE_INSERT = "INSERT INTO " + TABLE_NAME + "(Firstname,Lastname,PhoneNumber) VALUES (?,?,?)"; 

    private Context context; 
    private SQLiteDatabase database; 
    private SQLiteStatement insertSQLiteStatement; 

    public DbHelper(Context context) { 
    this.context = context; 
    DbOpenHelper dbOpenHelper = new DbOpenHelper(context); 
    database = dbOpenHelper.getWritableDatabase(); 
    insertSQLiteStatement = database.compileStatement(TABLE_INSERT); 
    } 

    public void close(){ 
    database.close(); 
    } 

    public void reopen(){ 
    close(); 
    DbOpenHelper dbOpenHelper = new DbOpenHelper(context); 
    database = dbOpenHelper.getWritableDatabase();  
    } 

    private static class DbOpenHelper extends SQLiteOpenHelper { 
    public DbOpenHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     db.execSQL(TABLE_CREATE); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME); 
     onCreate(db); 
    } 
    } 
}