attempt to make a simple recycler view to show the results of an rss request and parsing

app/build.gradle

@@ -34,4 +34,10 @@ dependencies {
 
     implementation 'com.github.bumptech.glide:glide:4.8.0'
     annotationProcessor 'com.github.bumptech.glide:compiler:4.8.0'
+
+    implementation 'com.squareup.retrofit2:retrofit:2.4.0'
+    implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
+    implementation 'com.squareup.retrofit2:converter-simplexml:2.4.0'
+
+    implementation 'com.android.support:recyclerview-v7:28.0.0'
 }

app/src/main/java/com/readrops/app/MainActivity.java

@@ -2,26 +2,102 @@ package com.readrops.app;
 
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.support.v7.widget.DividerItemDecoration;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.util.Log;
 
 import com.readrops.readropslibrary.PageParser;
+import com.readrops.readropslibrary.Utils.Utils;
+import com.readrops.readropslibrary.localfeed.RSSNetwork;
+import com.readrops.readropslibrary.localfeed.rss.RSSFeed;
+import com.readrops.readropslibrary.localfeed.rss.RSSItem;
+
+import org.simpleframework.xml.Serializer;
+import org.simpleframework.xml.core.Persister;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+
+import okhttp3.Call;
+import okhttp3.Callback;
+import okhttp3.Response;
 
 public class MainActivity extends AppCompatActivity {
 
     String url = "https://framablog.org/";
 
+    private RecyclerView recyclerView;
+    private MainAdapter adapter;
+
+    private List<RSSItem> itemList;
+
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        Thread thread = new Thread(()-> {
-            String feedUrl = PageParser.getFeedLink(url);
-
+        /*Thread thread = new Thread(() -> {
+            String imageUrl = PageParser.getOGImageLink("https://usbeketrica.com/galerie/dennis-osadebe-portrait-of-a-bright-generation");
             Log.d("", "");
+
+            runOnUiThread(() -> {
+                getItems();
+            });
         });
 
-        thread.start();
+        thread.start();*/
+
+        getItems();
+
+    }
+
+    private void getItems() {
+        RSSNetwork request = new RSSNetwork();
+
+        request.request("https://www.numerama.com/feed/", new Callback() {
+            @Override
+            public void onFailure(Call call, IOException e) {
+
+            }
+
+            @Override
+            public void onResponse(Call call, Response response) throws IOException {
+                if (response.isSuccessful()) {
+                    InputStream stream = response.body().byteStream();
+                    String xml = Utils.inputStreamToString(stream);
+
+                    Serializer serializer = new Persister();
+
+                    try {
+                        RSSFeed rssFeed = serializer.read(RSSFeed.class, xml);
+                        itemList = rssFeed.getChannel().getItems();
+
+                        runOnUiThread(() -> {
+                            initRecyclerView();
+                        });
+
+
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        });
+    }
+
+    private void initRecyclerView() {
+        recyclerView = findViewById(R.id.items_recycler_view);
+        adapter = new MainAdapter(this, itemList);
+        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
+        recyclerView.setLayoutManager(layoutManager);
+
+        DividerItemDecoration decoration = new DividerItemDecoration(this, ((LinearLayoutManager) layoutManager).getOrientation());
+        recyclerView.addItemDecoration(decoration);
+
+        recyclerView.setAdapter(adapter);
     }
 
 

app/src/main/java/com/readrops/app/MainAdapter.java

@@ -0,0 +1,73 @@
+package com.readrops.app;
+
+import android.content.Context;
+import android.media.Image;
+import android.support.annotation.NonNull;
+import android.support.v7.widget.RecyclerView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.bumptech.glide.Glide;
+import com.readrops.readropslibrary.PageParser;
+import com.readrops.readropslibrary.localfeed.rss.RSSItem;
+
+import java.util.List;
+
+public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> {
+
+    List<RSSItem> items;
+    private Context context;
+
+    public MainAdapter(Context context, List<RSSItem> items) {
+        this.context = context;
+        this.items = items;
+    }
+
+    @NonNull
+    @Override
+    public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
+        LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
+        View view = inflater.inflate(R.layout.compact_list_element, viewGroup, false);
+
+        return new ViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
+        RSSItem item = items.get(i);
+        viewHolder.bind(item);
+
+        Thread thread = new Thread(() -> {
+            String imageUrl = PageParser.getOGImageLink(item.getLink());
+            Glide.with(context).load(imageUrl).into(viewHolder.itemImage);
+        });
+
+
+    }
+
+    @Override
+    public int getItemCount() {
+        return items.size();
+    }
+
+    static class ViewHolder extends RecyclerView.ViewHolder {
+
+        private TextView itemTitle;
+        private ImageView itemImage;
+
+        ViewHolder(@NonNull View itemView) {
+            super(itemView);
+
+            itemTitle = itemView.findViewById(R.id.item_title);
+            itemImage = itemView.findViewById(R.id.item_image);
+        }
+
+        private void bind(RSSItem item) {
+            itemTitle.setText(item.getTitle());
+        }
+    }
+}

app/src/main/res/layout/activity_main.xml

@@ -6,13 +6,13 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Hello World!"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toRightOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/items_recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:scrollbars="vertical">
+
+
+    </android.support.v7.widget.RecyclerView>
 
 </android.support.constraint.ConstraintLayout>

app/src/main/res/layout/compact_list_element.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content">
+
+    <TextView
+        android:id="@+id/item_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="qsdsdsfdksfdsfjdsklfdjsfdslkfjdsfjdsfjldksfjdsfdskfjdslfdksfkldsfdsfdsqd"
+        android:layout_marginLeft="15dp"
+        android:layout_marginStart="15dp"
+        android:layout_marginTop="12dp"
+        android:layout_marginRight="20dp"
+        android:layout_marginEnd="20dp"
+        android:minLines="1"
+        android:maxLines="3"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:layout_toLeftOf="@id/item_image"
+        android:layout_toStartOf="@id/item_image"
+        />
+
+    <ImageView
+        android:id="@+id/item_image"
+        android:layout_width="150dp"
+        android:layout_height="70dp"
+        android:layout_marginTop="12dp"
+        android:layout_marginRight="15dp"
+        android:layout_marginEnd="15dp"
+        android:layout_alignParentEnd="true"
+        android:layout_marginBottom="12dp"
+        />
+
+
+
+</RelativeLayout>

readropslibrary/src/main/java/com/readrops/readropslibrary/Utils/Utils.java

@@ -0,0 +1,13 @@
+package com.readrops.readropslibrary.Utils;
+
+import java.io.InputStream;
+import java.util.Scanner;
+
+public final class Utils {
+
+    public static String inputStreamToString(InputStream input) {
+        Scanner scanner = new Scanner(input).useDelimiter("\\A");
+        return scanner.hasNext() ? scanner.next() : "";
+    }
+
+}

readropslibrary/src/main/java/com/readrops/readropslibrary/localfeed/RSSNetwork.java

@@ -0,0 +1,17 @@
+package com.readrops.readropslibrary.localfeed;
+
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+
+public class RSSNetwork {
+
+    public void request(String url, okhttp3.Callback callback) {
+        OkHttpClient okHttpClient = new OkHttpClient();
+
+        Request request = new Request.Builder().url(url).build();
+
+        okHttpClient.newCall(request).enqueue(callback);
+    }
+
+
+}