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POHow do i auto-decrement primary key value in SQlite Android
 

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  1. POHow do i auto-decrement primary key value in SQlite Android
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    <p>I have a tables in android SQLite and I am trying to figure out how to reset the <code>KEY_ID</code>, I read that: <code>DELETE FROM tablename</code> should delete everything and reset the autoincremement field back to 0 but when I do this it just deletes the data. When a new record is inserted the autoincrement picks up where it left off before the delete. I have implemented a <code>longitemclicklistner</code> on list, it gets the position and i want to delete the particular item from the list. Here is my code</p> <pre><code>public void deleteContact(Contact contact) { SQLiteDatabase db = this.getWritableDatabase(); getWritableDatabase().delete(TABLE_CONTACTS, KEY_ID + " = ?", new String[] { String.valueOf(contact.getID()) } ); db.close(); } </code></pre> <p>Here is the code in <code>onlongclicklistner</code></p> <pre><code> public boolean onItemLongClick(AdapterView&lt;?&gt; arg0, View arg1, int pos, long id) { // TODO Auto-generated method stub Log.v("long clicked","pos"+" "+pos); final int p=pos+1; final AlertDialog.Builder b = new AlertDialog.Builder(MainActivity.this); b.setIcon(android.R.drawable.ic_dialog_alert); b.setMessage("Are you sure you want to DELETE this Entry?"); b.setPositiveButton("Yes", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // continue with delete db.getWritableDatabase(); db.deleteContact(db.getContact(p)); Intent i = new Intent(MainActivity.this,MainActivity.class); startActivity(i); } }); b.setNegativeButton("No", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // do nothing } }); b.show(); } </code></pre> <p>The problem is, <code>id1</code> is created then <code>id2</code> is created but when i delete <code>id2</code> and create a new contact, it gets the <code>id3</code>. i want it to get <code>id2</code></p>
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    1. USRinoTom
    1. USHassaan Rabbani
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      1. VTApproveEditSuggestion
    1. COInstead of DELETE statement, use Truncate <table-name> this will remove your data and set autoincrement to 0 back.
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      1. POHow do i auto-decrement primary key value in SQlite Android
      1. USVigbyor
    2. CO@Vigbyor TRUNCATE is not available in sqlite.
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      1. USlaalto
 

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