Cfrgtkky

I have a custom ListView and adapter. I can delete an item from my lists which are set on my custom list, but I can delete from ListView. When I try to call adapter.remove(position) the editor is saying to "create a method "remove(int position)"". I don't know what should I do when I create this method into the adapter. Code :

Filling my listview:

lv = (ListView) findViewById(R.id.list);

        LayoutInflater mLInflater = getLayoutInflater();

        final ListViewAdapter adapter = new ListViewAdapter(

                getApplicationContext(), kimdenlist, konulist,

                mLInflater);

        lv.setAdapter(adapter);

ListViewAdapter:

public class ListViewAdapter extends BaseAdapter {

    static HashMap<Integer, Boolean> cartItems = new HashMap<Integer, Boolean>();

    Context mContext;

    ArrayList<String> kimdenlist; // to load images

    ArrayList<String> konulist; // for data

    LayoutInflater mLayoutInflater;



    public ListViewAdapter(Context context, ArrayList<String> kimdenlist, ArrayList<String> konulist,

            LayoutInflater layoutInflater) {

        mContext = context;

        this.kimdenlist = kimdenlist;

        this.konulist = konulist;

        mLayoutInflater = layoutInflater;

    }



    @Override

    public int getCount() 

    {



        return kimdenlist.size(); // images array length

    }



    @Override

    public Object getItem(int arg0) {



        return null;

    }



    @Override

    public long getItemId(int arg0) {



        return 0;

    }



    int count = 0;



    // customized Listview

    @Override

    public View getView(int position, View arg1, ViewGroup arg2) {



        View v;

        final int pos = position;

        v = mLayoutInflater.inflate(R.layout.listust, null);



        TextView kimden = (TextView) v.findViewById(R.id.textvKimden);

        kimden.setText(kimdenlist.get(position));

        TextView konu = (TextView) v.findViewById(R.id.textvKonu);

        konu.setText(konulist.get(position));

        CheckBox ch = (CheckBox) v.findViewById(R.id.chk);

        try {

            if (count != 0) {

                boolean b = cartItems.get(pos);

                if (b == false)

                    ch.setChecked(false);

                else

                    ch.setChecked(true);

            }

        } catch (NullPointerException e) {



        }





        ch.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override

            public void onCheckedChanged(CompoundButton arg0, boolean arg1) {

                cartItems.put(pos, arg1);

                count++;



            }

        });

        return v;

    }



    public static HashMap<Integer, Boolean> getcartItems() {

        return cartItems;

    }



}

When I click to "delete_Button" : I can only remove from lists:

konulist.remove(konulist.get(position));;

kimdenlist.remove(kimdenlist.get(position));

It's because your listViewAdapter has not remove method! You extend BaseAdapter and it has not remove method. You shoud create remove method in listviewAdapter and it will looks like

public void remove(int position){

    konulist.remove(konulist.get(position));;

    kimdenlist.remove(kimdenlist.get(position));

}

You have to understand how list view and adapter works. Adapter holds data for listview. Adapter method getView is called when list line is going to be created. List size is calculated by value returned by adapter's getCount() and so on...

To remove an item from ListView BUT NOT INSIDE ADAPTER CLASS:

lv.removeViewAt(index);

adapter.notifyDataSetChanged();

where "index" specifies the position or index in the ListView that holds the item to delete.

To remove an item from ListView INSIDE ADAPTER CLASS: First you need to add a Tag to each item in the list. use some layout within the content item in the list to assign that Tag. This can be done within the method getView ().

@Override

public View getView(int position, View convertView, ViewGroup parent) {

    row = convertView;



    if(row == null){

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        row = inflater.inflate(R.layout.item_lista_lugares_visitar, parent, false);

        holder = new ViewHolder();



        // ... DO WHAT YOU NEED HERE

        holder.linearLayoutContainer = (LinearLayout) row.findViewById(R.id.ll_container);

        // Set the position as a Tag for the view

        holder.linearLayoutContainer.setTag(position);



    } else {

        holder = (ViewHolder) row.getTag();

    }



    // ... DO WHAT YOU NEED HERE



    return row;

}



// Method for remove an item of ListView inside adapter class

// you need to pass as an argument the tag you added to the layout of your choice

public void removeView(Object position) {

      // lv and the adapter must be public-static in their Activity Class

      SomeActivity.lv.removeViewAt(Integer.parteInt(position).toString());

      SomeActivity.adapter.notifyDataSetChanged();

}

After your code

konulist.remove(konulist.get(position));
kimdenlist.remove(kimdenlist.get(position));

you can call the method:

notifyDataSetChanged();