CODEWITHSUNDEEP
androidlistview
Devil Raily
Devil Raily

Reputation: 562

Get the id from listview when an item is clicked

I have a column in the database _id I would like to get this id when an list view item is clicked. Currently the code below is giving me the position of the item. I' am still playing around with it I have a feeling something is wrong in the method 'getItemId'

onCreate method

        ArrayList<String> arrayCatNames = new ArrayList<String>();
        String query = "SELECT * FROM category ORDER BY name ASC";
        Cursor results = myDB.rawQuery(query, null);
        while(results.moveToNext()){
            String catName = results.getString(results.getColumnIndex("name"));
            arrayCatNames.add(catName);
        }
        String[] catNamesArr = new String[arrayCatNames.size()];
        catNamesArr = arrayCatNames.toArray(catNamesArr);
        lvActivityCategory = (ListView) findViewById(R.id.lvActivityCategory);
        lvActivityCategory.setAdapter(new categoryCursorAdaptor(this, catNamesArr));
        lvActivityCategory.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent intent = new Intent(getApplicationContext(), categoryActivity.class);
                intent.putExtra("category_id", id);

                Context context = getApplicationContext();
                String s = Long.toString(position);
                CharSequence text = s;
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();
            }
        });

categoryCursorAdaptor

class categoryCursorAdaptor extends BaseAdapter {

    Context context;
    String[] data;
    private static LayoutInflater inflater = null;

    public categoryCursorAdaptor(Context context, String[] data) {
        this.context = context;
        this.data = data;
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return data.length;
    }

    @Override
    public Object getItem(int position) {
        return data[position];
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View vi = convertView;
        if (vi == null) vi = inflater.inflate(R.layout.item_category, null);
        TextView text = (TextView) vi.findViewById(R.id.itemListCategory);
        text.setText(data[position]);
        return vi;
    }
}

Upvotes: 0

Views: 486

Answers (1)

Tosin Onikute
Tosin Onikute

Reputation: 4002

ArrayList<String> arrayCatNames = new ArrayList<String>();
ArrayList<Integer> arrayIds = new ArrayList<Integer>();
String query = "SELECT * FROM category ORDER BY name ASC";
Cursor results = myDB.rawQuery(query, null);
while(results.moveToNext()){
            String catName = results.getString(results.getColumnIndex("name"));
            int Ids = results.getInt(results.getColumnIndex("_id"));
            arrayCatNames.add(catName);
            arrayIds.add(Ids);
}

Then in your onItemClick

yourCategoryId = arrayIds.get(position);

You need to declare your ArrayList arrayIds at the top, before your onCreate

Upvotes: 1

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