hi guys,

my problem is that i have 5 tables and need inserts and selects.

what i did is for every table a class and there i wrote the SQL Statements like this

    public class Contact

private static String IDCont = "id_contact";
    private static String NameCont = "name_contact";
    private static String StreetCont = "street_contact";
    private static String Street2Cont = "street2_contact";
    private static String Street3Cont = "street3_contact";
    private static String ZipCont = "zip_contact";
    private static String CityCont = "city_contact";
    private static String CountryCont = "country_contact";
    private static String Iso2Cont = "iso2_contact";
    private static String PhoneCont = "phone_contact";
    private static String Phone2Cont = "phone2_contact";
    private static String FaxCont = "fax_contact";
    private static String MailCont = "mail_contact";
    private static String Mail2Cont = "mail2_contact";
    private static String InternetCont = "internet_contact";
    private static String DrivemapCont = "drivemap_contact";
    private static String PictureCont = "picture_contact";
    private static String LatitudeCont = "latitude_contact";
    private static String LongitudeCont = "longitude_contact";
    public static final String TABLE_NAME = "contact";
        public static final String SQL_CREATE = "CREATE TABLE IF NOT EXISTS " + TABLE_NAME + "(" +
        IDCont + "INTEGER not NULL," +
        NameCont + " TEXT not NULL," +
        StreetCont + " TEXT," +
        Street2Cont + " TEXT," +
        Street3Cont + " TEXT," +
        ZipCont + " TEXT," +
        CityCont + " TEXT," +
        CountryCont + " TEXT," +
        Iso2Cont + " TEXT," +
        PhoneCont + " TEXT," +
        Phone2Cont + " TEXT," +
        FaxCont + " TEXT," +                
        MailCont + " TEXT," +
        Mail2Cont + " TEXT," +
        InternetCont + " TEXT," +       //website of the contact
        DrivemapCont + " TEXT," +       //a link to a drivemap to the contact
        PictureCont + " TEXT," +            //a photo of the contact building (contact is not a person)
        LatitudeCont + " TEXT," +
        LongitudeCont + " TEXT," +
        "primary key(id_contact)" +
        "foreign key(iso2)";

and my insert looks like this

    public boolean SQL_INSERT_CONTACT(int IDContIns, String NameContIns, String StreetContIns,
                    String Street2ContIns, String Street3ContIns, String ZipContIns, 
                    String CityContIns, String CountryContIns, String Iso2ContIns,
                    String PhoneContIns, String Phone2ContIns, String FaxContIns,
                    String MailContIns, String Mail2ContIns, String InternetContIns,
                    String DrivemapContIns, String PictureContIns, String LatitudeContIns,
                    String LongitudeContIns) {
        try{
        db.execSQL("INSERT INTO " + "contact" +
                "(" + IDCont + ", " + NameCont + ", " + StreetCont + ", " + 
                Street2Cont + ", " + Street3Cont + ", " + ZipCont + ", " + 
                CityCont + ", " + CountryCont + ", " + Iso2Cont + ", " + 
                PhoneCont + ", " + Phone2Cont + ", " + FaxCont + ", " + 
                MailCont + ", " + Mail2Cont + ", " + InternetCont + ", " + 
                DrivemapCont + ", " + PictureCont + ", " + LatitudeCont + ", " + 
                LongitudeCont + ") " +
                "VALUES (" + IDContIns + ", " + NameContIns +", " + StreetContIns + ", " +
                Street2ContIns + ", " + Street3ContIns + ", " + ZipContIns + ", " +
                CityContIns + ", " + CountryContIns + ", " + Iso2ContIns + ", " + 
                PhoneContIns + ", " + Phone2ContIns + ", " + FaxContIns + ", " + 
                MailContIns + ", " + Mail2ContIns + ", " + InternetContIns + ", " + 
                DrivemapContIns + ", " + PictureContIns + ", " + LatitudeContIns + ", " + 
                LongitudeContIns +")");
        return true;
        }
        catch (SQLException e) {
            return false;   
        }

    }

i have a DBAdapter class there i created the database

 public class DBAdapter {

         public static final String DB_NAME = "mol.db";
            private static final int DB_VERSION = 1;
            private static final String TAG = "DBAdapter";      //to log

            private final Context context;
            private SQLiteDatabase db;

        public DBAdapter(Context context) 
            {
                this.context = context;
                OpenHelper openHelper = new OpenHelper(this.context);
                this.db = openHelper.getWritableDatabase();
        }

     public static class OpenHelper extends SQLiteOpenHelper 
        {

            public OpenHelper(Context context) {
            super(context, DB_NAME, null, DB_VERSION);
        }
    @Override
        public void onCreate(SQLiteDatabase db) {
            // TODO Auto-generated method stub
            db.execSQL(Contact.SQL_CREATE);
            db.execSQL(Country.SQL_CREATE);
            db.execSQL(Picture.SQL_CREATE);
            db.execSQL(Product.SQL_CREATE);
            db.execSQL(Project.SQL_CREATE);

        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            // TODO Auto-generated method stub
            Log.w(TAG, "Upgrading database from version "
                    + oldVersion + " to " + newVersion
                    + ", which will destroy all old data");
            db.execSQL(Contact.SQL_DROP);
            db.execSQL(Country.SQL_DROP);
            db.execSQL(Picture.SQL_DROP);
            db.execSQL(Product.SQL_DROP);
            db.execSQL(Project.SQL_DROP);
            onCreate(db);
        }

i found so many different things and tried them but i didn't get anything to work... i need to know how can i access the database in my activity and how i can get the insert to work and is there sth wrong in my code? thanks for your help

thats how i tried to get it into my activity

public class MainTabActivity extends TabActivity {


private Context context;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.maintabactivity);

    TabHost mTabHost = getTabHost();



    Intent intent1 = new Intent().setClass(this,MapOfLight.class);
    //Intent intent2 = new Intent().setClass(this,Test.class);              //Testactivity
    //Intent intent2 = new Intent().setClass(this,DetailView.class);        //DetailView
    Intent intent2 = new Intent().setClass(this,ObjectList.class);      //ObjectList
    //Intent intent2 = new Intent().setClass(this,Gallery.class);           //Gallery
    Intent intent3 = new Intent().setClass(this,ContactDetail.class);
    mTabHost.addTab(mTabHost.newTabSpec("tab_mol").setIndicator(this.getText(R.string.mol), getResources().getDrawable(R.drawable.ic_tab_mol)).setContent(intent1));
    mTabHost.addTab(mTabHost.newTabSpec("tab_highlights").setIndicator(this.getText(R.string.highlights),getResources().getDrawable(R.drawable.ic_tab_highlights)).setContent(intent2));
    mTabHost.addTab(mTabHost.newTabSpec("tab_contacts").setIndicator(this.getText(R.string.contact),getResources().getDrawable(R.drawable.ic_tab_contact)).setContent(intent3));

    mTabHost.setCurrentTab(1);



    SQLiteDatabase db;
    DBAdapter dh = null;
    OpenHelper openHelper = new OpenHelper(this.context);


    dh = new DBAdapter(this);
    db = openHelper.getWritableDatabase();

    dh.SQL_INSERT_COUNTRY("AT", "Austria", "AUT");

}

}

i tried it with my country table because it has only 3 columns

public class Country {

    private static String Iso2Count = "iso2_country";
    private static String NameCount = "name_country";
    private static String FlagCount = "flag_image_url_country";

    public static final String TABLE_NAME = "country";
    public static final String SQL_CREATE = "CREATE TABLE IF NOT EXISTS " + TABLE_NAME + "(" +
    Iso2Count + " TEXT not NULL," +
    NameCount + " TEXT not NULL," +
    FlagCount + " TEXT not NULL," +
    "primary key(iso2_country)";

    public boolean SQL_INSERT_COUNTRY(String Iso2CountIns, String NameCountIns, String FlagCountIns) {
        try{
        db.execSQL("INSERT INTO " + "country" +
                "(" + Iso2Count + ", " + NameCount + ", " + FlagCount + ") " +
                "VALUES ( " + Iso2CountIns + ", " + NameCountIns +", " + FlagCountIns + " )");
        return true;
        }
        catch (SQLException e) {
            return false;   
        }

    }

another question is it better to put the insert and select from each table into a separate class, so i have 1 class for each table or put them all into the DBAdapter class?