Improve webtoon reader precaching images. Show a badge for the apk.

README.md

@@ -1,6 +1,6 @@
 Mangafeed is a Manga reader for Android that tries to have the same features as Manga Watcher, but being Open Source.
 
-Latest debug build available [here](http://mangafeed.kanade.eu/latest/app-debug.apk)
+[![latest debug build](https://img.shields.io/badge/download-latest%20debug%20build-brightgreen.svg)](http://mangafeed.kanade.eu/latest/app-debug.apk)
 
 ## License
 

app/src/main/java/eu/kanade/mangafeed/ui/reader/viewer/webtoon/WebtoonReader.java

@@ -2,7 +2,6 @@ package eu.kanade.mangafeed.ui.reader.viewer.webtoon;
 
 import android.os.Bundle;
 import android.support.annotation.Nullable;
-import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.view.GestureDetector;
 import android.view.LayoutInflater;
@@ -14,6 +13,7 @@ import java.util.List;
 
 import eu.kanade.mangafeed.data.source.model.Page;
 import eu.kanade.mangafeed.ui.reader.viewer.base.BaseReader;
+import eu.kanade.mangafeed.widget.PreCachingLayoutManager;
 import rx.Subscription;
 import rx.android.schedulers.AndroidSchedulers;
 import rx.subjects.PublishSubject;
@@ -24,6 +24,7 @@ import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 public class WebtoonReader extends BaseReader {
 
     private WebtoonAdapter adapter;
+    private RecyclerView recycler;
     private Subscription subscription;
     private GestureDetector gestureDetector;
 
@@ -31,9 +32,9 @@ public class WebtoonReader extends BaseReader {
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
         adapter = new WebtoonAdapter(this);
-        LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
+        PreCachingLayoutManager layoutManager = new PreCachingLayoutManager(getActivity());
 
-        RecyclerView recycler = new RecyclerView(getActivity());
+        recycler = new RecyclerView(getActivity());
         recycler.setLayoutParams(new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT));
         recycler.setLayoutManager(layoutManager);
         recycler.setItemAnimator(null);
@@ -70,8 +71,7 @@ public class WebtoonReader extends BaseReader {
 
     @Override
     public void setSelectedPage(int pageNumber) {
-        // TODO
-        return;
+        recycler.scrollToPosition(getPositionForPage(pageNumber));
     }
 
     @Override

app/src/main/java/eu/kanade/mangafeed/widget/PreCachingLayoutManager.java

@@ -0,0 +1,28 @@
+package eu.kanade.mangafeed.widget;
+
+import android.content.Context;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+
+public class PreCachingLayoutManager extends LinearLayoutManager {
+
+    private static final int DEFAULT_EXTRA_LAYOUT_SPACE = 600;
+    private int extraLayoutSpace = -1;
+
+    public PreCachingLayoutManager(Context context) {
+        super(context);
+    }
+
+    public void setExtraLayoutSpace(int extraLayoutSpace) {
+        this.extraLayoutSpace = extraLayoutSpace;
+    }
+
+    @Override
+    protected int getExtraLayoutSpace(RecyclerView.State state) {
+        if (extraLayoutSpace > 0) {
+            return extraLayoutSpace;
+        }
+        return DEFAULT_EXTRA_LAYOUT_SPACE;
+    }
+
+}