Use RecyclerView for catalogue

2016-01-03 00:30:20 +01:00
parent 453a187938
commit 868058a50b
8 changed files with 186 additions and 123 deletions
@@ -0,0 +1,49 @@
+package eu.kanade.mangafeed.widget;
+
+import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.RecyclerView;
+
+import rx.functions.Action0;
+
+public class EndlessRecyclerScrollListener extends RecyclerView.OnScrollListener {
+
+    private int previousTotal = 0; // The total number of items in the dataset after the last load
+    private boolean loading = true; // True if we are still waiting for the last set of data to load.
+    private int visibleThreshold = 5; // The minimum amount of items to have below your current scroll position before loading more.
+    int firstVisibleItem, visibleItemCount, totalItemCount;
+
+    private GridLayoutManager layoutManager;
+
+    private Action0 requestNext;
+
+    public EndlessRecyclerScrollListener(GridLayoutManager layoutManager, Action0 requestNext) {
+        this.layoutManager = layoutManager;
+        this.requestNext = requestNext;
+    }
+
+    public void resetScroll() {
+        previousTotal = 0;
+        loading = true;
+    }
+
+    @Override
+    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+        super.onScrolled(recyclerView, dx, dy);
+
+        visibleItemCount = recyclerView.getChildCount();
+        totalItemCount = layoutManager.getItemCount();
+        firstVisibleItem = layoutManager.findFirstVisibleItemPosition();
+
+        if (loading && (totalItemCount > previousTotal)) {
+            loading = false;
+            previousTotal = totalItemCount;
+        }
+        if (!loading && (totalItemCount - visibleItemCount)
+                <= (firstVisibleItem + visibleThreshold)) {
+            // End has been reached
+            requestNext.call();
+            loading = true;
+        }
+    }
+
+}