CODEWITHSUNDEEP
androidfilterandroid-recyclerviewsearchview
unknown apk
unknown apk

Reputation: 141

searchview with recycler view is not working properly

hi i am developing one app where i have implemented recycler view and searchview in fregement.i get the filter product first time according to text change. But when i delete text one by one all list will be empty.Notheing can display at the end .

Here is my code from my fragement

Upvotes: 3

Views: 937

Answers (3)

earthw0rmjim
earthw0rmjim

Reputation: 19427

As i see the main problem is you're manipulating the List your adapter is populated from, but you do not have a "copy" of the original dataset.

Something like this should work:

ArrayList<ProductList> plistarray;     // these are instance variables
ArrayList<ProductList> plistarrayCopy; // in your adapter

// ...

public void filter(String text) {
    if (plistarrayCopy == null) {
        plistarrayCopy = new ArrayList<>(plistarray);
    }

    if (text.isEmpty()) {
        plistarray.clear();
        plistarray.addAll(plistarrayCopy);
        plistarrayCopy = null;
    } else {
        text = text.toLowerCase();
        ArrayList<Device> filteredList = new ArrayList<>();

        for (ProductList pList : plistarrayCopy) {
            if (pList.getPtitle().toLowerCase().contains(text)) {
                filteredList.add(pList);
            }
        }
        plistarray.clear();
        plistarray.addAll(filteredList);
    }
    notifyDataSetChanged();
}

Upvotes: 1

Nikhil
Nikhil

Reputation: 3711

You are continuously operating on single array named plistarray

here in filter() method you have cleared plistarray and again used the same to find the records. so you should use some other array for you adapter rather than plistarray

public void filter(String text) {
        if (text.isEmpty()) {
            plistarray.clear();
            plistarray.addAll(plistarray);
        } else {
            ArrayList<ProductList> result = new ArrayList<>();
            text = text.toLowerCase();
            //after clearing the array again you are using same array to find the items from
            for (ProductList item : plistarray) {
                if (item.getPtitle().toLowerCase().contains(text)) {
                    result.add(item);
                }
            }
             //you have cleared all the contains here
            plistarray.clear();
            // and added only result related items here
            plistarray.addAll(result);
        }
        notifyDataSetChanged();
    }

Upvotes: 2

Ichigo Kurosaki
Ichigo Kurosaki

Reputation: 3843

I think the problem is in the if (text.isEmpty()) { block of filter method.
Here you clear the plistarray list and add that empty list in plistarray.addAll(plistarray);

Instead of this add your original datalist for the plistarray.addAll(); This will resolve your empty list problem.
Remember this, when you perform the search always first make a dummy/copy of original list in constructor of adapter, and use this dummy to restore the data.

Hope, this will solve your problem.

Upvotes: 1

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