Setup Recyclerview for Trending movie list

app/build.gradle

@@ -35,13 +35,16 @@ android {
 }
 
 dependencies {
+    implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     def retrofit_version = '2.9.0'
     def dagger_version = '2.22'
     def rxjava_version = '2.1.1'
     def rxcalladapter_version = '2.5.0'
     def rxandroid_version = '2.0.1'
     def material_version = "1.0.0"
     def nav_version = '2.2.2'
+    def glideVersion = '4.8.0'
+    def androidxVersion = '1.0.0'
 
     implementation 'androidx.appcompat:appcompat:1.4.1'
     implementation 'com.google.android.material:material:1.5.0'
@@ -60,6 +63,8 @@ dependencies {
     implementation "androidx.navigation:navigation-ui-ktx:$nav_version"
     implementation "androidx.navigation:navigation-runtime:$nav_version"
 
+    implementation "androidx.recyclerview:recyclerview:$androidxVersion"
+
     //Retrofit for Networking
     implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
     implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"
@@ -80,4 +85,8 @@ dependencies {
 
     // Rx-Retrofit Call Adapter
     implementation "com.squareup.retrofit2:adapter-rxjava2:$rxcalladapter_version" // Retrofit call adapter
+
+    // Glide
+    implementation "com.github.bumptech.glide:glide:$glideVersion"
+    annotationProcessor "com.github.bumptech.glide:compiler:$glideVersion"
 }

app/src/main/java/com/shashank/moviedb/di/ActivityBuildersModule.java

@@ -1,5 +1,8 @@
 package com.shashank.moviedb.di;
 
+import com.shashank.moviedb.di.home.HomeFragmentBuildersModule;
+import com.shashank.moviedb.di.home.HomeModule;
+import com.shashank.moviedb.di.home.HomeScope;
 import com.shashank.moviedb.ui.HomeActivity;
 
 import dagger.Module;
@@ -9,6 +12,9 @@
 @Module
 public abstract class ActivityBuildersModule {
 
-    @ContributesAndroidInjector
+    @HomeScope
+    @ContributesAndroidInjector(
+            modules = {HomeModule.class, HomeFragmentBuildersModule.class}
+    )
     abstract HomeActivity contributeHomeActivity();
 }

app/src/main/java/com/shashank/moviedb/di/AppComponent.java

@@ -3,6 +3,7 @@
 import android.app.Application;
 
 import com.shashank.moviedb.BaseApplication;
+import com.shashank.moviedb.ui.home.viewholder.MovieViewHolder;
 
 import javax.inject.Singleton;
 

app/src/main/java/com/shashank/moviedb/di/AppModule.java

@@ -1,5 +1,11 @@
 package com.shashank.moviedb.di;
 
+import android.app.Application;
+
+import com.bumptech.glide.Glide;
+import com.bumptech.glide.RequestManager;
+import com.bumptech.glide.request.RequestOptions;
+import com.shashank.moviedb.R;
 import com.shashank.moviedb.data.remote.MovieApi;
 import com.shashank.moviedb.data.remote.MovieRepository;
 import com.shashank.moviedb.data.remote.MovieRepositoryImpl;
@@ -50,4 +56,19 @@ public static MovieApi provideMovieApi(Retrofit retrofit) {
     public static MovieRepository provideMovieRepository(MovieApi movieApi) {
         return new MovieRepositoryImpl(movieApi);
     }
+
+    // TODO: set placeholder later
+    @Singleton
+    @Provides
+    public static RequestOptions provideRequestOptions() {
+        return RequestOptions.placeholderOf(R.drawable.small_placeholder)
+                .error(R.drawable.small_placeholder);
+    }
+
+    @Singleton
+    @Provides
+    public static RequestManager provideGlideInstance(Application application, RequestOptions requestOptions) {
+        return Glide.with(application).setDefaultRequestOptions(requestOptions);
+    }
+
 }

app/src/main/java/com/shashank/moviedb/di/home/HomeFragmentBuildersModule.java

@@ -0,0 +1,14 @@
+package com.shashank.moviedb.di.home;
+
+import com.shashank.moviedb.ui.home.HomeFragment;
+import com.shashank.moviedb.ui.home.viewholder.MovieViewHolder;
+
+import dagger.Module;
+import dagger.android.ContributesAndroidInjector;
+
+@Module
+public abstract class HomeFragmentBuildersModule {
+
+    @ContributesAndroidInjector
+    abstract HomeFragment contributeHomeFragment();
+}

app/src/main/java/com/shashank/moviedb/di/home/HomeModule.java

@@ -0,0 +1,28 @@
+package com.shashank.moviedb.di.home;
+
+import android.app.Application;
+
+import androidx.recyclerview.widget.GridLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.bumptech.glide.RequestManager;
+import com.shashank.moviedb.ui.home.adapter.MovieRecyclerAdapter;
+
+import dagger.Module;
+import dagger.Provides;
+
+@Module
+public class HomeModule {
+
+    @HomeScope
+    @Provides
+    public static MovieRecyclerAdapter provideMovieRecyclerAdapter(RequestManager requestManager) {
+        return new MovieRecyclerAdapter(requestManager);
+    }
+
+    @HomeScope
+    @Provides
+    public static RecyclerView.LayoutManager provideGridLayoutManager(Application application) {
+        return new GridLayoutManager(application, 2);
+    }
+}

app/src/main/java/com/shashank/moviedb/di/home/HomeScope.java

@@ -0,0 +1,13 @@
+package com.shashank.moviedb.di.home;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import javax.inject.Scope;
+
+@Scope
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+public @interface HomeScope {
+}

app/src/main/java/com/shashank/moviedb/ui/home/HomeFragment.java

@@ -7,11 +7,30 @@
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.RecyclerView;
 
+import com.bumptech.glide.RequestManager;
 import com.shashank.moviedb.R;
+import com.shashank.moviedb.data.Resource;
+import com.shashank.moviedb.data.ResourceCallback;
+import com.shashank.moviedb.data.Status;
+import com.shashank.moviedb.data.remote.MovieRepository;
+import com.shashank.moviedb.model.MovieResponse;
+import com.shashank.moviedb.model.MovieResult;
+import com.shashank.moviedb.ui.home.adapter.MovieRecyclerAdapter;
 
-public class HomeFragment extends Fragment {
+import java.util.List;
+
+import javax.inject.Inject;
+
+import dagger.android.support.DaggerFragment;
+
+public class HomeFragment extends DaggerFragment {
+
+    @Inject public MovieRecyclerAdapter movieRecyclerAdapter;
+    @Inject public RecyclerView.LayoutManager gridLayoutManager;
+    @Inject public MovieRepository movieRepository;
+    private RecyclerView movieRecyclerView;
 
     @Nullable
     @Override
@@ -20,5 +39,27 @@ public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup c
         return inflater.inflate(R.layout.fragment_home, null);
     }
 
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        movieRecyclerView = view.findViewById(R.id.rv_movie);
+
+        initUI();
+        movieRepository.fetchTrendingMovies(new ResourceCallback() {
+            @Override
+            public void onResponse(Resource resource) {
+                if(resource.getStatus() == Status.SUCCESS) {
+                    List<MovieResult> movies = ((MovieResponse)resource.getData()).getResults();
+                    movieRecyclerAdapter.setMovies(movies);
+                }
+            }
+        });
+    }
+
+    private void initUI() {
+        movieRecyclerView.setLayoutManager(gridLayoutManager);
+        movieRecyclerView.setAdapter(movieRecyclerAdapter);
+    }
+
 
 }

app/src/main/java/com/shashank/moviedb/ui/home/adapter/MovieRecyclerAdapter.java

@@ -0,0 +1,84 @@
+package com.shashank.moviedb.ui.home.adapter;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.lifecycle.MutableLiveData;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.bumptech.glide.RequestManager;
+import com.shashank.moviedb.R;
+import com.shashank.moviedb.model.MovieResult;
+import com.shashank.moviedb.ui.home.viewholder.MovieViewHolder;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.inject.Inject;
+
+public class MovieRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+
+    private static final int MOVIE_TYPE = 1;
+    private static final int EXHAUSTED_TYPE = 2;
+    private RequestManager requestManager;
+
+    @Inject
+    public MovieRecyclerAdapter(RequestManager requestManager) {
+        this.requestManager = requestManager;
+    }
+
+    private List<MovieResult> mMovies = new ArrayList<>();
+
+    @NonNull
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+
+        View view = null;
+
+        switch (viewType) {
+
+            case EXHAUSTED_TYPE:
+                view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_search_exhausted, parent, false);
+                return new SearchExhaustedViewHolder(view);
+
+            case MOVIE_TYPE:
+
+            default:
+                view = LayoutInflater.from(parent.getContext()).inflate(R.layout.movie_view_layout, parent, false);
+                return new MovieViewHolder(view, requestManager);
+        }
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
+
+        int viewType = getItemViewType(position);
+
+        if(viewType == MOVIE_TYPE) {
+            ((MovieViewHolder)holder).onBind(mMovies.get(position));
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        return mMovies.size();
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        if(!mMovies.isEmpty()) {
+            return MOVIE_TYPE;
+        } else {
+            // movie list is empty
+            return EXHAUSTED_TYPE;
+        }
+    }
+
+
+    public void setMovies(List<MovieResult> movies) {
+        this.mMovies = movies;
+        notifyDataSetChanged();
+    }
+}

app/src/main/java/com/shashank/moviedb/ui/home/adapter/SearchExhaustedViewHolder.java

@@ -0,0 +1,13 @@
+package com.shashank.moviedb.ui.home.adapter;
+
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+public class SearchExhaustedViewHolder extends RecyclerView.ViewHolder {
+
+    public SearchExhaustedViewHolder(@NonNull View itemView) {
+        super(itemView);
+    }
+}

app/src/main/java/com/shashank/moviedb/ui/home/viewholder/MovieViewHolder.java

@@ -0,0 +1,59 @@
+package com.shashank.moviedb.ui.home.viewholder;
+
+import android.view.View;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.widget.AppCompatImageView;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.bumptech.glide.RequestManager;
+import com.shashank.moviedb.R;
+import com.shashank.moviedb.model.MovieResult;
+import com.shashank.moviedb.util.Constants;
+
+import javax.inject.Inject;
+
+public class MovieViewHolder extends RecyclerView.ViewHolder {
+
+
+    private RequestManager requestManager;
+
+    private AppCompatImageView movieImage;
+    private TextView movieTitle;
+    private TextView movieVoteAverage;
+
+    public MovieViewHolder(@NonNull View itemView, RequestManager requestManager) {
+        super(itemView);
+        this.requestManager = requestManager;
+        movieImage = itemView.findViewById(R.id.iv_movie);
+        movieTitle = itemView.findViewById(R.id.tv_movie_title);
+        movieVoteAverage = itemView.findViewById(R.id.tv_vote_average);
+    }
+
+
+    public void onBind(MovieResult movie) {
+
+        String url = getMoviePosterUrl(movie);
+        if(url!=null) {
+            final String finalPosterUrl = Constants.BASE_IMAGE_URL_API + url;
+            requestManager.load(finalPosterUrl).into(movieImage);
+        }
+
+        movieTitle.setText(movie.getTitle());
+
+        String voteAverage = (movie.getVoteAverage()!=null)? movie.getVoteAverage().toString() : "_._";
+        movieVoteAverage.setText(voteAverage);
+    }
+
+    private String getMoviePosterUrl(MovieResult movie) {
+        String url = null;
+        if(movie.getBackdropPath()!=null) {
+            url = movie.getBackdropPath();
+        } else if(movie.getPosterPath()!=null) {
+            url = movie.getPosterPath();
+        }
+
+        return url;
+    }
+}

app/src/main/java/com/shashank/moviedb/util/Constants.java

@@ -15,6 +15,8 @@ public abstract class Constants {
     public static final Long READ_TIMEOUT = 2000L;
 
     public static final String INVALID_MOVIE_ID_ERROR_MSG = "Invalid Movie ID";
+    public static final String BASE_IMAGE_URL_API = "https://image.tmdb.org/t/p/w185_and_h278_bestv2/";
+    public static final String BASE_IMAGE_URL_w500_API = "https://image.tmdb.org/t/p/w500/";