Delete Custom Row In ListView

Question

I have two classes that I'm working with. Contacts and CustomAdapter. In my Contacts Class I have an onActivityResult() method, which gets data from a different activity and places it in a Custom ListView using my CustomAdapter Class. The data gets added fine. Each row consists of a name, email, phone number AND a Button Widget. My question is, I would like to be able to press this Button and have that specific row be deleted. I've tried a number of different things but nothing seems to be working.

I placed the code below. If anyone has any suggestions on the best way to do this, I would greatly appreciate it. Thank you.

onActivityResult in Contacts Class:

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == REQUEST_CODE){
        if(resultCode == RESULT_OK){
            String name = data.getStringExtra("name");
            String phone = data.getStringExtra("phone");
            final String email = data.getStringExtra("email");
            //These are array lists declared earlier
            phoneNums.add(phone);
            names.add(name);
            emails.add(email);

            customAdapter = new CustomAdapter(Contacts.this,names,phoneNums,emails);
            contactList.setAdapter(customAdapter);

 contactList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                    names.remove(position);
                    phoneNums.remove(position);
                    phoneNums.remove(position);

                    //This method is still not being recognized
                    contactList.getAdapter().notifyDataSetChanged()

                   //This one is but the app is crashing when I click on any of the rows

                    contactList.getAdapter().notify()
                }
            });

        }
    }
}

Custom Adapter Entire Class:

public class CustomAdapter extends BaseAdapter implements View.OnClickListener {
private Context context;
private ArrayList<String>phoneNumbers;
private ArrayList<String>names;
private ArrayList<String>emails;
private static LayoutInflater inflater = null;


public CustomAdapter(Context c,ArrayList<String>n,ArrayList<String>nums,ArrayList<String>e){
    context = c;
    phoneNumbers = nums;
    names = n;
    emails = e;
    inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}
@Override
public int getCount() {
    return names.size();
}

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

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

@Override
public View getView(final int position, final View convertView, ViewGroup parent) {
    View view = convertView;

    if (view == null){
        view = inflater.inflate(R.layout.contacts_custom_row,null);
        Button deleteBtn = (Button)view.findViewById(R.id.customRowDeleteButton);
        TextView name = (TextView)view.findViewById(R.id.customRowContactName);
        TextView phone = (TextView)view.findViewById(R.id.customRowContactNumber);
        TextView email = (TextView)view.findViewById(R.id.customRowContactEmail);

        name.setText(names.get(position));
        phone.setText(phoneNumbers.get(position));
        email.setText(emails.get(position));

        deleteBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
             //SHOULD I PLACE CODE TO DELETE THE ROW IN HERE?

            }
        });


    }
    return view;
}

Mateus Brandao · Accepted Answer · 2015-09-22 23:10:08Z

1

Basically what you need is one List<>to rule the size of you List (i believe yours is the names. For that, your getItem(int position) has to return names.size(). To delete a specific row, you just need to delete the index of names that you want, and call notifyDataSetChanged() in your adapter after that.

answered Sep 22, 2015 at 23:10

Mateus Brandao

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11 Comments

Mark F Over a year ago

So my getItem method looks like this now....public Object getItem(int position) {return names.size();} Do you know how and where I would utilize this now? Back in the Contacts class or within the onClick in the getView method above?Thank you.

Mateus Brandao Over a year ago

you dont need to use this method, it's used automatically by the adapter.

Mark F Over a year ago

When you say "delete the index of names that you want", where would I place this code?

Mateus Brandao Over a year ago

You can put this code on the click listener that you already defined. Delete the index, and call this.notifyDataSetChanged();

Mark F Over a year ago

I tried this in my onClick() names.remove(position);notifyDataSetChanged(); This is only deleting my last row in the ListView, instead of the specific one that I click. What should I pass in the names.remove parameter instead? The position variable isn't quite working.

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