How to replace recyclerview with button?

Question

Android

I am new to programming, please help to replace recyclerview with Button!
There is a list of Levels, I need to make a button that would launch 1 level (Level 1), instead of recyclerview!
CategoryActivity

public class CategoryActivity extends ActionBarActivity {


    private Toolbar toolbar;
    private RecyclerView recyclerView;
    private List<CategoryModel> categoryList = new ArrayList<>();



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_category);




        toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("Choose Category");
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onBackPressed();
                overridePendingTransition(R.anim.animation_enter, R.anim.animation_leave);
            }
        });



        initCategory();


        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        recyclerView.setHasFixedSize(true);

        final LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(layoutManager);

        CategoryAdapter adapter = new CategoryAdapter(categoryList);
        recyclerView.setAdapter(adapter);


    }



    public void initCategory() {
        categoryList.add(new CategoryModel("Level 1"));
        categoryList.add(new CategoryModel("Level 2"));
        categoryList.add(new CategoryModel("Level 3"));
        categoryList.add(new CategoryModel("Level 4"));
        categoryList.add(new CategoryModel("Level 5"));
    }


    @Override
    public void onBackPressed() {
        super.onBackPressed();
        overridePendingTransition(R.anim.animation_enter, R.anim.animation_leave);
    }

    @Override
    protected void onPause() {
        super.onPause();

    }
}

CategoryAdapter

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

    private List<CategoryModel> items;
    private DatabaseHandler databaseHandler;

    public CategoryAdapter(List<CategoryModel> items) {
        this.items = items;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_category, viewGroup, false);
        ViewHolder vh = new ViewHolder(v);
        return vh;
    }

    @Override
    public int getItemCount() {
        return items.size();
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int i) {
        viewHolder.cat_name.setText(items.get(i).getName());
    }

    @Override
    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
        super.onAttachedToRecyclerView(recyclerView);
    }

    class ViewHolder extends RecyclerView.ViewHolder {
        CardView cv;
        TextView cat_name;

        ViewHolder(final View itemView) {
            super(itemView);
            cv = (CardView) itemView.findViewById(R.id.cardView);
            cat_name = (TextView) itemView.findViewById(R.id.cat_name);
            cv.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent(itemView.getContext(), BeginTestActivity.class);
                    Bundle b = new Bundle();
                    databaseHandler = new DatabaseHandler(itemView.getContext());
                    b.putString("category", cat_name.getText().toString());
                    if (databaseHandler.getScoreForCategory(cat_name.getText().toString()) != null) {
                        b.putString("best_score", databaseHandler.getScoreForCategory(cat_name.getText().toString()).getScore());
                    } else {
                        b.putString("best_score", "0");
                    }
                    intent.putExtras(b);
                    itemView.getContext().startActivity(intent);
                }
            });

        }
    }
}

Answer 1

Here is the code that "starts the level":

Intent intent = new Intent(itemView.getContext(), BeginTestActivity.class);
                    Bundle b = new Bundle();
                    databaseHandler = new DatabaseHandler(itemView.getContext());
                    b.putString("category", cat_name.getText().toString());
                    if (databaseHandler.getScoreForCategory(cat_name.getText().toString()) != null) {
                        b.putString("best_score", databaseHandler.getScoreForCategory(cat_name.getText().toString()).getScore());
                    } else {
                        b.putString("best_score", "0");
                    }
                    intent.putExtras(b);
                    itemView.getContext().startActivity(intent);"

"Finish" it so that it does not depend on the RecyclerView by removing everything superfluous or replacing it with values ​​obtained using "logging debugging".