Question

I am developing a simple app that inserts in database and searches in the inserted data

i created the database and i could see all the rows inserted…i want to search for the rows using the Name column

i am having an error and i don’t know where is the error line

below is my code to create the database.

sampleDB =  this.openOrCreateDatabase(SAMPLE_DB_NAME, MODE_PRIVATE, null);

sampleDB.execSQL("CREATE TABLE IF NOT EXISTS "+SAMPLE_TABLE_NAME +
                    " (Id INT(50), Name VARCHAR," +
                    " Price INT(50), Qty INT(50), Discount INT(50), Category INT(10));");

and here’s the code to search in the database

Button saveButton = (Button) findViewById(R.id.search_button);

        saveButton.setOnClickListener(new View.OnClickListener() {

            public void onClick(View arg0) {

                String searchStr = search.getText().toString();

                Cursor c = sampleDB.rawQuery("SELECT Name, Price FROM "+SAMPLE_TABLE_NAME+" WHERE Name like '"+searchStr+"'", null);

                if (c != null ) { 
                    if  (c.moveToFirst()) {
                        do {
                            String name = c.getString(c.getColumnIndex("Name"));
                            int cat = c.getInt(c.getColumnIndex("Category"));
                            results.add("" + name + ",Age: " + cat);
                            Log.v("Fname", name);
                            Log.v("Cat", cat+"");
                        }while (c.moveToNext());
                    }
                }

            }
        });

knowing that searchStr has the name i want to search for in the database

here’s the error i am having

Bad request for field slot 0,-1. numRows = 18, numColumns = 2
FATAL EXCEPTION: main
java.lang.IllegalStateException: get field slot from row 0 col -1 failed

any help please ?

Answer 1

You are selecting only name and price in the query:

Cursor c = sampleDB.rawQuery("SELECT Name, Price FROM "+SAMPLE_TABLE_NAME+" WHERE Name like '"+searchStr+"'", null);

and then you are trying to access category..

int cat = c.getInt(c.getColumnIndex("Category"));

So you should add category to your select statement:

Cursor c = sampleDB.rawQuery("SELECT Name, Price, Category FROM "+SAMPLE_TABLE_NAME+" WHERE Name like '"+searchStr+"'", null);