Custom Array adapter in fragment

Question

I am very new in Andriod. i have tried so many times but got stuck on this problem since long time. I have an activity named ProductListActivity and in this activity i have one fragments. now i want to display List and for that i have created my own custom array adapter. its working fine when when i am not using fragments but for fragments giving me NullPointerException. I debug my code. Please help me out guys.Thanks for considering. Here i am pasting my code.

Activity class:

public class ProductListActivity extends Activity implements ProductInterface{
public static String cookie;
public static String jsonSettingsResponse;
public static String[] tids;
public static String jsonPorductsCategoryListResponseString;
public JSONArray jsonPorductsCategoryListResponseArray;
public static String vid;
public static String publicPath;
public static JSONArray productsList;
public ArrayList<String> listItems;
public String[] listProCategory;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.product_category_and_list);
    Intent intent = getIntent();
    cookie = intent.getStringExtra(BConstant.WEB_SERVICES_COOKIES);
    productsList = new JSONArray();
    FetchProductCategories products = new FetchProductCategories();
    productsList = products.fetchProducts();
    listProCategory = products.onDisplayProductList(productsList).toArray(
            new String[0]);

    Bundle bundle = new Bundle();
    bundle.putString(BConstant.WEB_SERVICES_COOKIES, cookie);
    bundle.putString(BConstant.PUBLIC_PATH, publicPath);
    bundle.putStringArray(BConstant.TAXONOMY_TID, tids);
    bundle.putStringArray(BConstant.PRODUCT_CATEGORY_NAMES, listProCategory);
    ProductCategoryFragment productCategoryFragment = new ProductCategoryFragment();
    FragmentManager manager = getFragmentManager();
    productCategoryFragment.setArguments(bundle);

}

private class FetchProductCategories {
    protected JSONArray fetchProducts(String... params) {
        jsonSettingsResponse = WebserviceBUtil
                .callWebServicesGetVocabularyList(cookie);
        vid = JSONUtil.parseJSONResponse(jsonSettingsResponse,
                BConstant.TAXONOMY_VID);
        publicPath = JSONUtil.parseJSONResponse(jsonSettingsResponse,
                BConstant.PUBLIC_PATH);
        jsonPorductsCategoryListResponseString = WebserviceBUtil
                .callWebServicesGetProductsList(cookie, vid);
        tids = ProductCategoryIds.parseJSONResponseToGetTidsOfProducts(
                jsonPorductsCategoryListResponseString,
                BConstant.TAXONOMY_TID);
        try {
            jsonPorductsCategoryListResponseArray = new JSONArray(
                    jsonPorductsCategoryListResponseString);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return jsonPorductsCategoryListResponseArray;
    }


    protected ArrayList<String> onDisplayProductList(JSONArray result) {
        listItems = new ArrayList<String>();
        for (int i = 0; i < result.length(); i++) {
            try {
                listItems
                        .add(result.getJSONObject(i)
                                .getString(BConstant.NAME_CONSTANT)
                                .toString());
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        return listItems;
    }
}


    @Override
    public HashMap<Integer, Bitmap> DownloadImages(HashMap<Integer, String> productCategoryImagePath) {
        HashMap<Integer, Bitmap> imgBitmap = new HashMap<Integer, Bitmap>();
        for (int pos = 0; pos < productCategoryImagePath.size(); pos++) {
            Bitmap bval = ImageDownloader
                    .getBitmapFromURL(productCategoryImagePath.get(pos));
        imgBitmap.put(pos, bval);
        }
        return imgBitmap;

}
}

Fragments class:

public class ProductCategoryFragment extends Fragment {
ProductInterface productInterface;
private static String[] tids;
private static HashMap<Integer, String> productCategoryImagePath;
private static String jsonPorductsDetailsImagePathResponse;
private static String publicPath;
private static String cookie;
public String[] listProCategory;
public  ListView listOfProductsCategory;
private static HashMap<Integer, Bitmap> imgBitmapUrls;
DisplayProductListArrayAdapter adapter;


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
     View fragProcatView = inflater.inflate(R.layout.product_category_list, container,
                false);
     listOfProductsCategory = (ListView) getActivity().findViewById(R.id.productCategorylistView);
    return fragProcatView;

}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    publicPath = getArguments().getString(BConstant.PUBLIC_PATH);
    cookie = getArguments().getString(BConstant.WEB_SERVICES_COOKIES);
    tids = getArguments().getStringArray(BConstant.TAXONOMY_TID);
    listProCategory = getArguments().getStringArray(
            BConstant.PRODUCT_CATEGORY_NAMES);
    Bundle b = getActivity().getIntent().getExtras();
    publicPath = b.getString(BConstant.PUBLIC_PATH);
    cookie = b.getString(BConstant.WEB_SERVICES_COOKIES);
    tids =b.getStringArray(BConstant.TAXONOMY_TID);
    listProCategory =b.getStringArray(
            BConstant.PRODUCT_CATEGORY_NAMES);
    productInterface = (ProductInterface) getActivity();
    productCategoryImagePath = new HashMap<Integer, String>();
    for (int i = 0; i < tids.length; i++) {
        jsonPorductsDetailsImagePathResponse = WebserviceBUtil
                .callWebServicesGetProductsDetails(cookie, tids[i]);
        String filename = ProductCategoryIds
                .parseJSONResponseToGetVidOfProductsFromVocabulary(
                        jsonPorductsDetailsImagePathResponse,
                        BConstant.FILE_NAME);
        String completeUrl = publicPath + filename;
        productCategoryImagePath.put(i, completeUrl);
    }
    imgBitmapUrls = productInterface
            .DownloadImages(productCategoryImagePath);
     adapter = new DisplayProductListArrayAdapter(
                getActivity(), listProCategory,
                imgBitmapUrls);
    listOfProductsCategory.setAdapter(adapter);
}


/**
 * ExtendsArrayAdapterClassToDisplayCustomListView
 */
public class DisplayProductListArrayAdapter extends ArrayAdapter<String> {

    Context context;
    HashMap<Integer, Bitmap> prodctImgs;
    String[] proCategoryNames;
    HashMap<Integer, Bitmap>biturls;
    DisplayProductListArrayAdapter(Context c,
            String[] listCategory, HashMap<Integer, Bitmap> imgUrls) {
        super(c,
                R.layout.product_category_single_layout,
                R.id.productCategoryName, listCategory);
        this.context = c;
        this.prodctImgs = imgUrls;
        this.proCategoryNames = listCategory;
        this.biturls = imgUrls;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        //LayoutInflater inflater = (LayoutInflater) context
    //          .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        LayoutInflater inflater=((Activity)context).getLayoutInflater(); 
View row = inflater.inflate(R.layout.product_category_single_layout,parent,false);
        ImageView productCategoryImage = (ImageView) row
                .findViewById(R.id.productCategoryImageId);
        Bitmap bitmap = imgBitmapUrls.get(position);
        // productCategoryImage.setFocusable(false);
        TextView productCategoryName = (TextView) row
                .findViewById(R.id.productCategoryName);
        productCategoryImage.setImageBitmap(bitmap);
        productCategoryName.setText(proCategoryNames[position]);
        return row;
    }
     }
  }

Raghunandan · Accepted Answer · 2013-12-19 05:40:05Z

2

Change

listOfProductsCategory = (ListView) getActivity().findViewById(R.id.productCategorylistView);

to

listOfProductsCategory = (ListView) fragProcatView .findViewById(R.id.productCategorylistView);

findViewById looks for a view with the id in the current infalted layout. So use the view object to initialize your listview.

Edit:

You do something like this

  static ProductCategoryFragment newInstance(int num) {
    ProductCategoryFragment f = new ProductCategoryFragment();

    // Supply num input as an argument.
    Bundle args = new Bundle();
    args.putInt("num", num);
    f.setArguments(args);

    return f;
}

Then

int value = getArguments().getInt("num");

In Activity

 ProductCategoryFragment newFragment = ProductCategoryFragment.newInstance(10);

edited Dec 19, 2013 at 5:40

answered Dec 19, 2013 at 5:17

Raghunandan

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5 Comments

rupesh Over a year ago

Thanks Raghunandan for yor help, but in my fragment class code i am getting null pointer exception. in below lines : publicPath = getArguments().getString(BsharpConstant.PUBLIC_PATH); cookie = getArguments().getString(BsharpConstant.WEB_SERVICES_COOKIES); tids = getArguments().getStringArray(BsharpConstant.TAXONOMY_TID); listProCategory = getArguments().getStringArray( BsharpConstant.PRODUCT_CATEGORY_NAMES);

Raghunandan Over a year ago

@RRR all those variables are null

rupesh Over a year ago

but i am doing this in bundle.putString(BsharpConstant.WEB_SERVICES_COOKIES, cookie); bundle.putString(BsharpConstant.PUBLIC_PATH, publicPath); bundle.putStringArray(BsharpConstant.TAXONOMY_TID, tids); bundle.putStringArray(BsharpConstant.PRODUCT_CATEGORY_NAMES, listProCategory); productCategoryFragment.setArguments(bundle);

Raghunandan Over a year ago

@RRR nope not right. you need to pass values from activity to fragment??

Raghunandan Over a year ago

@RRR also this lin might help stackoverflowk.com/questions/12739909/…. Check accepted answer and comment by prosperk

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