CODEWITHSUNDEEP
android
sank
sank

Reputation: 133

While i am running the code below i am getting the adapter error,i tried solving it by seeing yt videos ....still its not working

While i am running the code below i am getting the adapter error,i tried solving it by seeing youtube videos ....still its not working ,its showing that adapter is abstract and so the error is there.which i have attached below.plz give the most relevent solution to this problem.

this is my GridAdapter.java code

public class GridAdapter extends RecyclerView.Adapter<GridAdapter.ViewHolder> {

    List<String>titles;
    List<Integer>images;
    LayoutInflater inflater;

    public GridAdapter(Context context,List<String>titles,List<Integer>images){
        this.titles = titles;
        this.images = images;
        this.inflater = LayoutInflater.from(context);
    }

  
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = inflater.inflate(R.layout.intoduction,parent,false);

        return new ViewHolder(view);
    }

    
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.titles.setText(titles.get(position));
        holder.images.setImageResource(images.get(position));

    }

    
    public int getItemCount() {
        return titles.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder{
        TextView titles;
        ImageView images;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            titles = itemView.findViewById(R.id.textView15);
            images = itemView.findViewById(R.id.imageView4);
        }
    }
}

this is my MainActivity2.java code

public class MainActivity2 extends AppCompatActivity {
    RecyclerView recycleview1;
    List<String> titles;
    List<Integer>images;
    Adapter GridAdapter;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.intropage);
        recycleview1 = findViewById(R.id.recycleview1);

        titles = new ArrayList<>();
        images = new ArrayList<>();

        titles.add("first item");
        titles.add("second item");
        titles.add("third item");
        titles.add("fourth item");

        images.add(R.drawable.bheeshma);
        images.add(R.drawable.sadak2);
        images.add(R.drawable.tanhaji);
        images.add(R.drawable.thappad);

        GridAdapter =  **new Adapter(this,titles,images);**

        GridLayoutManager gridLayoutManager = new 
        GridLayoutManager(this,2,GridLayoutManager.VERTICAL,false);
        recycleview1.setLayoutManager(gridLayoutManager);
        recycleview1.setAdapter(**GridAdapter**);




    }



}

this is the error i am getting

Adapter is abstract; cannot be instantiated
        GridAdapter =  new Adapter(this,titles,images);

Upvotes: 2

Views: 76

Answers (2)

Sathyan
Sathyan

Reputation: 168

You didn't give any vairiable name for GridAdapter class.That's why you are getting this error. First you have to declare it globally like GridAdapter gridAdapter;

and then you should instantiate inside you onCreate() method like

 gridAdapter = new GridAdapter(this,titles,images);

this will be the solution for your problem.

Upvotes: 1

Thrishool MSM
Thrishool MSM

Reputation: 347

You are using class name as variable name and the adapter you are using is of type GridAdapter(not Adapter). Make these changes in MainActivity2 file.

GridAdapter adapter;
adapter=new GridAdapter(this,titles,images);
recycleview1.setAdapter(adapter);

Upvotes: 1

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