Question

I am designing a form containing fields and wrote the query as

db.execSQL("CREATE TABLE pdetails( phone INTEGER PRIMARY KEY ASC, fname TEXT, lname TEXT, gender TEXT, email TEXT,  mainpin INTEGER)");

when I click the submit button data is inserted in database, but the problem is data is inserted with repeated primary keys. Can you please solve my problem?
my insertion code is :

                long flag = 0;
                int id = 1;
                SQLiteDatabase db = helper.getWritableDatabase();
                Cursor cursor = db.query("pdetails", new String[]{"count(*) phone"}, null, null, null, null, null);
                while(cursor.moveToNext())
                {
                    int idFromDatabase = cursor.getInt(cursor.getColumnIndex("phone"));
                    if(idFromDatabase != 0)
                    {
                        id = 1 + idFromDatabase;
                    }
                }
                ContentValues values = new ContentValues();
                //values.put("ID", id);
                values.put("fname", fnametxt.getText().toString().trim());
                values.put("lname", lnametxt.getText().toString().trim());
                if(male.isChecked())
                {
                    values.put("gender","male");
                }
                else
                values.put("gender", "Female");
                values.put("email", emailtxt.getText().toString());
                values.put("phone", Integer.parseInt(phone.getText().toString()));
                values.put("mainpin", mainpin.toString());
                flag = db.insert("pdetails", null, values);
                if(flag != -1)
                {
                    Toast toast = Toast.makeText(getApplicationContext(), "You have successful inserted this record into database! "+flag, Toast.LENGTH_LONG); 
                    toast.show();
                    db.close();
                    return;
                }
                else
                {
                    Toast toast = Toast.makeText(getApplicationContext(), "An error occured when insert this record into database!", Toast.LENGTH_LONG); 
                    toast.show();
                    db.close();
                    return;
                }
            }
        }
    }

Answer 1

You probably want to add “AUTOINCREMENT” to your phone column. This tells the database to automatically increment the key for every new row.

db.execSQL("CREATE TABLE pdetails( phone INTEGER PRIMARY KEY AUTOINCREMENT ASC, fname TEXT, lname TEXT, gender TEXT, email TEXT, mainpin INTEGER)");