M D P :
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.
M D P :
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();
}
}
}
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