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POHow do i upgrade my pre-populated sqlite database on my device without re-creating tables?
 

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  1. POHow do i upgrade my pre-populated sqlite database on my device without re-creating tables?
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    <p>I have my code below. It correctly reads my sqlite database file(that i have already created using the SQLite Database Browser) in my assets folder - moves it to the /data/data/packagename/databases/ path on my device then i am able to use a query and cursor to get my information and it works great. Code here:</p> <pre><code>public class DatabaseHelper extends SQLiteOpenHelper { private Context myDbContext; private static String dbName = "restaurant.db"; private static String outfilePath = "/data/data/dev.mypackage.com/databases/"; private static String path = outfilePath + dbName; private static SQLiteDatabase db; public DatabaseHelper(Context context){ super(context, dbName, null, 2); this.myDbContext = context; db = openDb(); String s = "select * from menu"; Cursor c = db.rawQuery(s, null); Log.e("DB Constructor Row count", String.valueOf(c.getCount()).toString()); while(c.moveToNext()){ Log.e("DB Constructor", c.getString(c.getColumnIndex("category"))); Log.e("DB Constructor", c.getString(c.getColumnIndex("menuItem_id"))); Log.e("DB Constructor", c.getString(c.getColumnIndex("title"))); Log.e("DB Constructor", c.getString(c.getColumnIndex("desc"))); Log.e("DB Constructor", c.getString(c.getColumnIndex("price"))); Log.e("DB Constructor", c.getString(c.getColumnIndex("icon"))); } c.deactivate(); c.close(); } private void copyDataBase(File dbFile) throws IOException { try{ InputStream dbStream = myDbContext.getAssets().open(dbName); OutputStream newDbFile = new FileOutputStream(outfilePath + dbName); byte[] buffer = new byte[1024]; int length; while((length = dbStream.read(buffer)) &gt; 0){ newDbFile.write(buffer); } newDbFile.flush(); newDbFile.close(); dbStream.close(); } catch(IOException e){ throw new IOException("trying to copy the database - ERROR: " + e.getMessage()); } } private SQLiteDatabase openDb() throws SQLiteException{ File dbFile = myDbContext.getDatabasePath(dbName); if(!dbFile.exists()){ Log.e("openDb", "file does not exist"); try { copyDataBase(dbFile); } catch (IOException e) { throw new RuntimeException("Error creating source database", e); } } return SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READONLY); } public void loadRestaurantInfo(){ } @Override public void onCreate(SQLiteDatabase db){ // TODO Auto-generated method stub } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } </code></pre> <p>Now i had to go back and add a row of information to one of the tables(in the database in the assets folder), using the SQLite Brower, - but that is not being reflected in my cursor output - I understand why this is happening - because if(!dbFile.exists()) fails so there is no copying to be done. So my question is - is what code do i need to add to make this work? I never created the tables with code so i dont see how useful the onUpgrade method is going to be for me. </p>
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      1. POHow do i upgrade my pre-populated sqlite database on my device without re-creating tables?
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