DataBaseHelper.java

/*
 * Copyright (C) 2015 Iasc CHEN
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package me.iasc.microduino.bluevoice.db;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DataBaseHelper extends SQLiteOpenHelper {

    private static final String DATABASE_NAME = "md.db";
    private static final int DATABASE_VERSION = 1;

    public static final String VOICE_CMD_TABLE = "voicecmd";

    // Voice Command
    public static final String C_ID = "id";
    public static final String C_CODE = "code";
    public static final String C_VOICE = "voice";
    public static final String C_NAME = "name";

    public static final String CREATE_VOICE_CMD_TABLE = "create table if not exists " + VOICE_CMD_TABLE
            + " (" + C_ID + " INTEGER PRIMARY KEY asc AUTOINCREMENT, "
            + C_CODE + " text UNIQUE, "
            + C_VOICE + " text UNIQUE, "
            + C_NAME + " text)";

    private static DataBaseHelper instance;

    public static synchronized DataBaseHelper getHelper(Context context) {
        if (instance == null)
            instance = new DataBaseHelper(context);
        return instance;
    }

    private DataBaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onOpen(SQLiteDatabase db) {
        super.onOpen(db);
        if (!db.isReadOnly()) {
            // Enable foreign key constraints
            db.execSQL("PRAGMA foreign_keys=ON;");
        }
    }

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

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    }
}