ramyhelow
3/12/2019 - 5:41 PM

Volley / JSON / AppController / Recycler / PicassoLibrary ( https://square.github.io/picasso/ )

public class MainActivity extends AppCompatActivity {

    ArrayList<Movie> movies = new ArrayList<>();
    ProgressDialog progressDialog;
    RecyclerView movieRecycler;
    MovieAdapter movieAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        getPosts();


    }

    public void getPosts() {
        showDialog();

        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, URL.URL, null, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {

                Log.e("hzm", response.toString());
                for (int i = 0; i < response.length(); i++) {

                    try {
                        JSONObject object = response.getJSONObject(i);

                        String title = object.getString("title");
                        String image = object.getString("image");
                        Double rating = object.getDouble("rating");
                        int releaseYear = object.getInt("releaseYear");
                        String genreString = "";

                        JSONArray genres = object.getJSONArray("genre");

                        for (int j=0; j<genres.length();j++){
                            genreString += genres.getString(j);
                            if(j!=genres.length()-1){
                                genreString += ", ";
                            }
                        }


                        movies.add(new Movie(title,image,rating,releaseYear,genreString));

                        hideDialog();
                    } catch (JSONException e) {
                        e.printStackTrace();
                        hideDialog();
                    }
                }

                movieRecycler = findViewById(R.id.postRecycler);
                movieRecycler.setLayoutManager(new LinearLayoutManager(MainActivity.this));
                movieAdapter = new MovieAdapter(movies, MainActivity.this);
                movieRecycler.setAdapter(movieAdapter);

            }
        },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        hideDialog();
                        Log.e("hzm", error.getMessage());
                    }
                });

        AppController.getInstance().addToRequestQueue(jsonArrayRequest);
    }

    private void showDialog() {
        progressDialog = new ProgressDialog(MainActivity.this);
        progressDialog.setCancelable(false);
        progressDialog.setTitle("Loading... ");
        progressDialog.show();
    }
    private void hideDialog() {
        progressDialog.hide();
    }

}
public class URL {
    public static final String URL = "https://api.androidhive.info/json/movies.json?fbclid=IwAR2PXO8XpcGBxNxtVIew2xWJrqP23FySE46CEI7NcXTMBOPKeg1ul8yDWdE";
}
public class Movie {
    private String title;
    private String image;
    private Double rating;
    private int releaseYear;
    private String genres;

    public Movie(String title, String image, Double rating, int releaseYear, String genres) {
        this.title = title;
        this.image = image;
        this.rating = rating;
        this.releaseYear = releaseYear;
        this.genres = genres;
    }
}
public class AppController extends Application {

    public static final String TAG = AppController.class.getSimpleName();

    private RequestQueue mRequestQueue;

    private static AppController mInstance;

    @Override
    public void onCreate() {
        super.onCreate();
        mInstance = this;
    }

    public static synchronized AppController getInstance() {
        return mInstance;
    }

    public RequestQueue getRequestQueue() {
        if (mRequestQueue == null) {
            mRequestQueue = Volley.newRequestQueue(getApplicationContext());
        }

        return mRequestQueue;
    }

    public <T> void addToRequestQueue(Request<T> req, String tag) {
        req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
        getRequestQueue().add(req);
    }

    public <T> void addToRequestQueue(Request<T> req) {
        req.setTag(TAG);
        getRequestQueue().add(req);
    }

    public void cancelPendingRequests(Object tag) {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(tag);
        }
    }
}
public class MovieAdapter extends RecyclerView.Adapter<MovieAdapter.MyViewHolder> {

    ArrayList<Movie> data;
    Activity activity;

    public MovieAdapter(ArrayList<Movie> data, Activity activity) {
        this.data = data;
        this.activity = activity;
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View itemView = (View) LayoutInflater.from(activity).inflate(R.layout.movie_item, viewGroup, false);
        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, int i) {

        myViewHolder.tvTitle.setText(data.get(i).getTitle() + "");
        myViewHolder.tvRating.setText(data.get(i).getRating() + "");
        myViewHolder.tvReleaseYear.setText(data.get(i).getReleaseYear()+"");
        myViewHolder.tvGenres.setText(data.get(i).getGenres());
        Picasso.get().load(data.get(i).getImage()).into(myViewHolder.tvImage);

        //myViewHolder.tvImage.set(data.get(i).getGenres());
        myViewHolder.linear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

            }
        });

    }

    @Override
    public int getItemCount() {
        return data.size();
    }

    public class MyViewHolder extends RecyclerView.ViewHolder {

        public TextView tvTitle;
        public TextView tvRating;
        public TextView tvReleaseYear;
        public TextView tvGenres;
        public ImageView tvImage;
        public LinearLayout linear;

        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            tvTitle = itemView.findViewById(R.id.tvTitle);
            tvRating = itemView.findViewById(R.id.tvRating);
            tvReleaseYear = itemView.findViewById(R.id.tvYear);
            tvGenres = itemView.findViewById(R.id.tvGenres);
            tvImage = itemView.findViewById(R.id.tvImage);
            linear = itemView.findViewById(R.id.linear);
        }
    }
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:id="@+id/linear"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <android.support.v7.widget.CardView
        android:padding="10dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="5dp"
        android:elevation="20dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">

            <ImageView
                android:id="@+id/tvImage"
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:layout_gravity="center"
                android:layout_margin="20dp"/>

            <LinearLayout
                android:layout_gravity="center"
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:orientation="vertical">

                <TextView
                    android:layout_weight="1"
                    android:textColor="@android:color/black"
                    android:textStyle="bold"
                    android:textSize="18dp"
                    android:id="@+id/tvTitle"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Title" />

                <TextView
                    android:textColor="@android:color/black"
                    android:layout_weight="1"
                    android:id="@+id/tvRating"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Rating" />

                <TextView
                    android:layout_weight="1"
                    android:id="@+id/tvGenres"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Genres" />

                <TextView
                    android:textAlignment="textEnd"
                    android:layout_gravity="end"
                    android:layout_weight="1"
                    android:id="@+id/tvYear"
                    android:layout_marginRight="10dp"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="TextView" />

            </LinearLayout>



        </LinearLayout>




    </android.support.v7.widget.CardView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/postRecycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.it.lec9_v1">
    <uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:name=".app.AppController"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>