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POwhy my first created row in database have id null1
 

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  1. POwhy my first created row in database have id null1
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    <p>my problem is, when I put something in my text fields and save that to database, the ID of that row is null1 instead of 1 here is my code for creating database and putting data in database :</p> <pre><code> private HelperDb myHelper; private final Context myContext; private SQLiteDatabase myDatabase; private static class HelperDb extends SQLiteOpenHelper { public HelperDb(Context context) { super(context, DATABASE_NAME, null, 1); // TODO Auto-generated constructor stub } @Override public void onCreate(SQLiteDatabase db) { // TODO Auto-generated method stub db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" + KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_NAME + " STRING, " + KEY_TEKST + " TEXT, " + KEY_DATUM + " STRING, " + KEY_VREME + " STRING);" ); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { // TODO Auto-generated method stub db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE); this.onCreate(db); } } public Baza(Context c){ myContext = c; } public Baza open() throws SQLException { myHelper = new HelperDb(myContext); myDatabase = myHelper.getWritableDatabase(); return this; } public void close() { myHelper.close(); } // this is how I put data in database public long unesiPodatkeBaza(String ime, String napisaniTekst, String uneseniDatum, String unesenoVreme) { // TODO Auto-generated method stub ContentValues cv = new ContentValues(); cv.put(KEY_NAME, ime); cv.put(KEY_TEKST, napisaniTekst); cv.put(KEY_DATUM, uneseniDatum); cv.put(KEY_VREME, unesenoVreme); return myDatabase.insert(DATABASE_TABLE, null, cv); } </code></pre> <p>later that make problem for application.</p> <p>This is how I collect data from database:</p> <pre><code>public String[] getData() { String[] kolone = new String[]{KEY_ROWID, KEY_NAME, KEY_TEKST, KEY_DATUM, KEY_VREME}; Cursor c = myDatabase.query(DATABASE_TABLE, kolone, null, null, null, null, null); iRed = c.getColumnIndex(KEY_ROWID); iIme = c.getColumnIndex(KEY_NAME); iTekst = c.getColumnIndex(KEY_TEKST); iDatum = c.getColumnIndex(KEY_DATUM); iVreme = c.getColumnIndex(KEY_VREME); for(c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ result = result + c.getString(iRed) + " " + c.getString(iIme) + " " + c.getString(iTekst) + " " + c.getString(iDatum) + " " + c.getString(iVreme) + "\n"; } return result.split("\n"); } </code></pre> <p>and this is what I'm doing with data:</p> <pre><code>public class SQLPregled extends Activity{ public String[] data; private ListView lv; private int idSend; @Override public void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.pregledbaze); lv = (ListView) findViewById(R.id.lvListaBaza); final Baza izlistavanje = new Baza(this); izlistavanje.open(); data = izlistavanje.getData(); izlistavanje.close(); lv.setAdapter(new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_list_item_1, data)); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id){ String tmplv = lv.getItemAtPosition(position).toString(); String[] odvojeni = tmplv.split(" "); idSend = Integer.parseInt(odvojeni[0]); AlertDialog.Builder adb = new AlertDialog.Builder(SQLPregled.this); adb.setTitle("Dali zelite da obrisete izabranu poruku?"); adb.setMessage("Id je : " + odvojeni[0]); adb.setPositiveButton("Obrisi", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub izlistavanje.open(); izlistavanje.deleteData(idSend); izlistavanje.close(); onCreate(null); } }); adb.setNegativeButton("Odustani", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub dialog.cancel(); } }); adb.show(); } }); } // onCreate } </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USEdward Thomson
    1. USWolf87
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. VO
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      1. POwhy my first created row in database have id null1
      1. This table or related slice is empty.
      1. VTUpMod
    1. COA helpful read would be: http://meta.stackexchange.com/questions/22186/how-do-i-format-my-code-blocks
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      1. POwhy my first created row in database have id null1
      1. USEdward Thomson
 

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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