How to use Android View Binding with RecyclerView

Question

This is not data binding, this is View binding which is new to Android Studio 3.6 Canary 11+ described here.

For using inside an Activity it is clear, you just use it like this:

Let's say we have a layout named activity_main.xml

Then in the code we can use it like this:

public class MainActivity extends Activity{      ActivityMainBinding binding; //Name of the layout in camel case + "Binding"      @Override     protected void onCreate(Bundle savedInstanceState){         super.onCreate(savedInstanceState);         binding = ActivityMainBinding.inflate(getLayoutInflater());         setContentView(binding.getRoot());     } } 

However, It's not clear how to use View Binding with RecyclerView?

Edit: Please explain in Java.

Answer 1

Let's say we have a RecyclerView inside activity_main.xml and its id is "@+id/rv_test"

Inside the Activity we can use it like so:

public class MainActivity extends Activity{      ActivityMainBinding binding; //Name of the layout in camel case + "Binding"      @Override     protected void onCreate(Bundle savedInstanceState){         super.onCreate(savedInstanceState);         binding = ActivityMainBinding.inflate(getLayoutInflater());         setContentView(binding.getRoot());          RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);         binding.rvTest.setLayoutManager(layoutManager);     } } 

Let's name the layout for RecyclerView items test_list_item.xml

Then we can implement our adapter inside Activity like this:

public class MainActivity extends Activity{      ActivityMainBinding binding; //Name of the layout in camel case + "Binding"      @Override     protected void onCreate(Bundle savedInstanceState){         super.onCreate(savedInstanceState);         binding = ActivityMainBinding.inflate(getLayoutInflater());         setContentView(binding.getRoot());          RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);         binding.rvTest.setLayoutManager(layoutManager);          List<String> items = Arrays.asList("item", "item", "item");          binding.rvTest.setAdapter(new MyAdapter(items));     }      private class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>{          private List<String> items;          private class MyViewHolder extends RecyclerView.ViewHolder{              TestListItemBinding binding;//Name of the test_list_item.xml in camel case + "Binding"              public MyViewHolder(TestListItemBinding b){                 super(b.getRoot());                 binding = b;             }         }          public MyAdapter(List<String> items){             this.items = items;         }          @NonNull         @Override         public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType){             return new MyViewHolder(TestListItemBinding.inflate(getLayoutInflater()));         }          @Override         public void onBindViewHolder(MyViewHolder holder, int position){             String text = String.format(Locale.ENGLISH, "%s %d", items.get(position), position);              //An example of how to use the bindings             holder.binding.tvTest.setText(text);         }          @Override         public int getItemCount(){             return items.size();         }     }  }