How can I use OnItemClick method in a listview?

Question

Hello I have a problem with my listView I have an error with my OnItemClick methd

FATAL EXCEPTION: main java.lang.ClassCastException: com.example.dell.app3.Product cannot be cast to java.util.HashMap

private void showProduct(String json){
        JSONObject jsonObject = null;
        ArrayList<Product> productList = new ArrayList<>();
        try {
            JSONArray result = new JSONArray(json);
            for(int i = 0; i<result.length(); i++){
                JSONObject jo = result.getJSONObject(i);
                String name = jo.getString("Nom");
                String ref = jo.getString("Reference");
                String image1 = "http://aaaa.com/Scripts/images/"+jo.getString("image")+".jpg";
                Product product = new Product();
                product.setName(name);
                product.setRef(ref);
                product.setImageUrl(image1);
                productList.add(product);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
        adapter = new CustomArrayAdapter(getContext(), productList);
        listView.setAdapter(adapter);
    }

OnItemClick method

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Intent intent = new Intent(getActivity().getApplicationContext(), ViewProduct.class);
        HashMap<String, String> map = (HashMap) parent.getItemAtPosition(position);
        String tid = map.get("ref").toString();
        intent.putExtra("ref", tid);
        startActivity(intent);
    }

I have an error also with my inputSearch

inputSearch.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
                ((CustomArrayAdapter) ProduitsFragment.this.adapter).getFilter().filter(cs);
            }
            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                                          int arg3) {
            }
            @Override
            public void afterTextChanged(Editable arg0) {
            }
        });

product.java

public class Product {
    String name;
    String ref;
    String imageUrl;

    public String getName() {
        return name;
    }
    public String getRef() {
        return ref;
    }
    public String getImageUrl() {
        return imageUrl;
    }
    public void setName(String name) {
        this.name = name;
    }
    public void setRef(String ref) {
        this.ref = ref;
    }
    public void setImageUrl(String imageUrl) {
        this.imageUrl = imageUrl;
    }
}

Was there a specific reason you thought you could cast your custom object to a Hashmap? — OneCricketeer, Jun 17 '16 at 13:08
Icorrected my onClickItem the problem now is in my inputSearch.addTextChangedListener because I want to filter my listview ondepending the name. I edited my post and I added my Product code — clara, Jun 17 '16 at 15:16

score 1 · Answer 1 · answered Jun 17 '16 at 13:06

1

Instead of

HashMap<String, String> map = (HashMap) parent.getItemAtPosition(position);
    String tid = map.get("ref").toString();

change it to

Product prod =  (Product)parent.getItemAtPosition(position);
    String tid = prod.getRef();

answered Jun 17 '16 at 13:06

SripadRaj

1,687
2
22
33

thanks and how can I correct the inputSearch.addTextChangedListener method? – clara Jun 17 '16 at 13:52

score 0 · Answer 2 · edited May 23 '17 at 10:29

Try this

declare global

  ArrayList<Product> productList = new ArrayList<>();

Replace your onItemClick with,

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Intent intent = new Intent(getActivity().getApplicationContext(), ViewProduct.class);
        // get item from list @position
        Product product = (Product)productList.get(position);
        String tid = product.getRef();
        intent.putExtra("ref", tid);
        startActivity(intent);
    }

For your Filter functionality:

inputSearch.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
                 // global object of custom adapter
                 customArrayAdapter.getFilter().filter(cs.toString());   
            }
            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                                          int arg3) {
            }
            @Override
            public void afterTextChanged(Editable arg0) {
            }
        });

To filter functionality try,

customArrayAdapter.getFilter().filter(cs);

Instead of

((CustomArrayAdapter) ProduitsFragment.this.adapter).getFilter().filter(cs);

For more please refer: Custom Listview Adapter with filter Android

thanks and how can I correct the inputSearch.addTextChangedListener method? — clara, Jun 17 '16 at 13:53

score 0 · Answer 3 · answered Jun 17 '16 at 13:15

You are geting value from Hashmap.it is excption in your code.Get value from Product Mode.Which is refer an object. try code

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Intent intent = new Intent(getActivity().getApplicationContext(), ViewProduct.class);
            Product product = (Product)parent.getItemAtPosition(position);
            String tid = product.getRef();
            intent.putExtra("ref", tid);
            startActivity(intent);
        }

thanks and how can I correct the inputSearch.addTextChangedListener method? — clara, Jun 17 '16 at 13:53

score -1 · Answer 4 · answered Jun 17 '16 at 13:06

-1

Instead of parent in onItemClick() use view

HashMap<String, String> map = (HashMap) view.getItemAtPosition(position);

answered Jun 17 '16 at 13:06

rahul sharma

149
1
2
11

How can I use OnItemClick method in a listview?

4 Answers4