RecyclerViewUtils Library Released
Recently, I became tired of writing the same old tedious code for every single RecyclerView and Adpater class I used, that all did the same thing, so I extrapolated all of it into a personal library.
The RecyclerViewUtils library helps make everyone’s life a little easier with a CoreViewHolder and CoreAdapter class, described below.
CoreViewHolder
At the heart of these classes is CoreViewHolder which is a RecyclerView.ViewHolder class used to display an object of a specific type. It has one abstract method for binding an object of that type.
Here is a sample of a CoreviewHolder for Account objects:
public class AccountViewHolder extends CoreViewHolder<Account> {
private TextView tvName;
private TextView tvBalance;
public AccountViewHolder(View view) {
super(view);
this.tvName = (TextView) view.findViewById(R.id.account_name);
this.tvBalance = (TextView) view.findViewById(R.id.account_balance);
}
@Override
protected void bindItem(Account item) {
this.tvName.setText(item.getName());
this.tvBalance.setText(String.valueOf(item.getBalance()));
}
}
CoreRecyclerViewAdapter
Using the CoreViewHolder class from above, the CoreRecyclerViewAdapter is an abstract base class for using an adapter of objects with a given type. By using a generic type, we were able to override many boilerplate methods such as:
- add
- remove
- swapItems
- onBindViewHolder
Thanks to this handy utils class, it cuts down on a ton of boilerplate code inside your adapter, and make it very simple:
public class AccountAdapter extends CoreRecyclerViewAdapter<Account, AccountAdapter.AccountViewHolder>{
public AccountAdapter(Context context, List<Account> accounts) {
super(context, accounts);
}
@Override
public AccountViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new AccountViewHolder(LayoutInflater.from(context).inflate(R.layout.list_item_account, parent, false));
}
public class AccountViewHolder extends CoreViewHolder<Account> {
...
}
}
