DataBinding in Recycleview Android

click items

public interface MovieClickHandler{
   void onNewClick(View view);
   void onWatchedClick(View view);
}



...

   <data>
       ...
       <variable name="click" type="com.example.databinding.MovieClickHandler" />

   </data>
...
           <ImageView
            ...
           android:onClick="@{movie.isWatched ? click.onWatchedClick : click.onNewClick}"/>
         
...


public void onBindViewHolder(MovieItemViewHolder holder, int position) {
   Movie movie = Movie.ITEMS[position];
   holder.binding.setMovie(movie);
   holder.binding.setClick(new MovieClickHandler() {
       @Override
       public void onWatchedClick(View view) {

       }

       @Override
       public void onOldClick(View view) {

       }
   });
}

Custom Setter

@BindingAdapter("bind:imageUrl")
public static void loadImage(ImageView imageView, String v) {
   Picasso.with(imageView.getContext()).load(v).into(imageView);
}



app:imageUrl="@{movie.image}"

Custom Setter 2

<ImageView
   ...
   app:filter='@{movie.isWatched ? "grey" : null}'
   .../>
   
   
   @BindingAdapter("bind:filter")
public static void applyFilter(ImageView imageView, String v) {
   imageView.setColorFilter(null);
   if("grey".equals(v)){
       ColorMatrix matrix = new ColorMatrix();
       matrix.setSaturation(0);
       ColorMatrixColorFilter cf = new ColorMatrixColorFilter(matrix);
       imageView.setColorFilter(cf);
   }
}

for null value

<TextView
   ...
   android:text='@{movie.title ?? "unknown"}'
   ... />

layout.xml

<layout xmlns:android="http://schemas.android.com/apk/res/android" 
   xmlns:app="http://schemas.android.com/apk/res-auto"> 

   <data> 
   </data> 

   <!-- Сюда добавляем свой layout --> 

</layout>

layout1.xml

<layout xmlns:android="http://schemas.android.com/apk/res/android" 
   xmlns:app="http://schemas.android.com/apk/res-auto"> 

  <data>
   <variable
       name="movie"
       type="com.example.databinding.Movie" />
  </data>

 <!-- Сюда добавляем свой layout --> 

</layout>

layout2.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto">

   <data>
       <variable
           name="movie"
           type="com.example.databinding.Movie" />
   </data>

   <android.support.v7.widget.CardView
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:orientation="vertical"
       android:layout_margin="8dp">

       <RelativeLayout
           android:id="@+id/relativeLayout"
           android:layout_width="match_parent"
           android:layout_height="wrap_content">

           <ImageView
               android:id="@+id/imageView"
               ...              
               app:imageUrl="@{movie.image}"/>
           <TextView
               android:id="@+id/textView"
               ...
               android:text="@{movie.title}"
               android:textAppearance="?android:attr/textAppearanceLarge" />

           <TextView
               android:id="@+id/textView2"
               ...
               android:text="@{movie.description}"
               android:textAppearance="?android:attr/textAppearanceSmall" />

       </RelativeLayout>

   </android.support.v7.widget.CardView>

</layout>

Movie.java

public class Movie {
   public boolean isWatched;
   public String image;
   public String description;
   public String title;

   public Movie(boolean isWatched, String image, String description, String title) {
       this.isWatched = isWatched;
       this.image = image;
       this.description = description;
       this.title = title;
   }
}

onBindViewHolder

@Override
public void onBindViewHolder(MovieItemViewHolder holder, int position) {
   Movie movie = Movie.ITEMS[position];
   holder.title.setText(movie.title);
   holder.description.setText(movie.description);
   Picasso.with(holder.image.getContext()).load(movie.image).into(holder.image);
}

onBindViewHolder2

@Override
public void onBindViewHolder(MovieItemViewHolder holder, int position) {
   Movie movie = Movie.ITEMS[position];
   holder.binding.setMovie(movie);
}

onCreateViewHolder.java

@Override
public MovieItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
   LayoutInflater inflater = LayoutInflater.from(parent.getContext());
   MovieItemBinding binding = MovieItemBinding.inflate(inflater, parent, false);
   return new MovieItemViewHolder(binding.getRoot());
}

ViewHolder.java

public class MovieItemViewHolder extends RecyclerView.ViewHolder {

   MovieItemBinding binding;

   public MovieItemViewHolder(View v) {
       super(v);
       binding = DataBindingUtil.bind(v);
   }
}