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POAndroid database recreates every time application is launched
 

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  1. POAndroid database recreates every time application is launched
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    <p>Why is SQLiteOpenHelper calling onCreate() every time my application starts up. Here's my code for onCreate()</p> <pre><code>@Override public void onCreate(SQLiteDatabase db) { Log.i("onCreate()", "Enter"); //create cards table db.execSQL( "create table circles" + "("+ "id integer primary key,"+ "x integer not null," + "y integer not null"+ ")" ); Log.i("onCreate()", "Exit"); } </code></pre> <p>I have an outside class around my extended SQLiteOpenHelper class, and when I query, I do this:</p> <pre><code>Cursor cursor = openHelper.getWritableDatabase().rawQuery("select * from circles", null); </code></pre> <p>and skips this block because of this if statement</p> <pre><code>if (cursor.moveToFirst()) {...} </code></pre> <p>Here's my entire Database wrapper class:</p> <p><pre> package db.main;</p> <p>import java.util.ArrayList; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; import testing.main.Circle;</p> <p>public class DBWrapper {</p> <p>private static final String DATABASE_NAME = "circles.db"; private static final int DATABASE_VERSION = 1; private static final String[] TABLES = new String[] { "circles"};</p> <p>private Context context; private OpenHelper openHelper;</p> <p>public DBWrapper(Context context) { context.deleteDatabase(DATABASE_NAME); this.context = context; this.openHelper = new OpenHelper(this.context); }</p> <p>public void insertCircle(Circle c) { String sql = "insert into circles (x, y) values (" + c.getX() + ", " + c.getY() + ")"; Log.i("DBWrapper::insertCircle()", "Executing sql: " + sql); openHelper.getWritableDatabase().execSQL(sql); }</p> <p>public void clearCircles() { String sql = "delete * from circles"; Log.i("DBWrapper::clearCircles()", "Executing sql: " + sql); openHelper.getWritableDatabase().execSQL(sql); }</p> <p>public ArrayList getCircles() { ArrayList circles = new ArrayList(); Cursor cursor = openHelper.getWritableDatabase().query(TABLES[0], null, null, null, null, null, null); //Cursor cursor = openHelper.getWritableDatabase().rawQuery("select * from circles", null); Log.i("DBWrapper::getCircles()", "move to first1"); if (cursor.moveToFirst()) { Log.i("DBWrapper::getCircles()", "move to first"); do { Log.i("DBWrapper::getCircles()", "Creating circle: " + cursor.getString(1) + ", " + cursor.getString(2)); circles.add(new Circle(Integer.parseInt(cursor.getString(1)), Integer.parseInt(cursor.getString(2)))); } while (cursor.moveToNext()); } if (cursor != null &amp;&amp; !cursor.isClosed()) { cursor.close(); } return circles; } private static class OpenHelper extends SQLiteOpenHelper {</p> <code> OpenHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase db) { Log.i("OpenHelper::onCreate()", "Enter"); //create cards table db.execSQL( "create table circles" + "("+ "id integer primary key,"+ "x integer not null," + "y integer not null"+ ")" ); Log.i("OpenHelper::onCreate()", "Exit"); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { Log.w("Example", "Upgrading database, this will drop tables and recreate."); for(String s: TABLES) { db.execSQL("DROP TABLE IF EXISTS " + s); } onCreate(db); } </code></pre> <p>} }</p> <p></p>
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    1. USCœur
    1. USwangburger
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    1. COHmmm. Are you testing on an emulator? If so, perhaps you should check to be sure you are not wiping user data from the emulator before starting it.
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      1. USHamy
    2. CONo I'm testing on a device
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      1. USwangburger
    3. COPerhaps you could post your entire body of database code? I don't see the problem in what you have here :/
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      1. USHamy
 

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