fix: create pagination auto adapter

Kaushik Gopal · Kaushik Gopal · commit 8be76386ecb2 · 2016-10-08T14:49:00.000-07:00
diff --git a/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoAdapter.java b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoAdapter.java
@@ -0,0 +1,99 @@
+package com.morihacky.android.rxjava.pagination;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+import com.morihacky.android.rxjava.R;
+import com.morihacky.android.rxjava.rxbus.RxBus;
+import java.util.ArrayList;
+import java.util.List;
+
+class PaginationAutoAdapter
+      extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+
+    private static final int ITEM_LOG = 0;
+    private static final int ITEM_BTN = 1;
+
+    private final List<String> _items = new ArrayList<>();
+    private final RxBus _bus;
+
+    PaginationAutoAdapter(RxBus bus) {
+        _bus = bus;
+    }
+
+    void addItems(List<String> items) {
+        _items.addAll(items);
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        if (position == _items.size()) {
+            return ITEM_BTN;
+        }
+
+        return ITEM_LOG;
+    }
+
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        switch (viewType) {
+            case ITEM_BTN:
+                return ItemBtnViewHolder.create(parent);
+            default:
+                return ItemLogViewHolder.create(parent);
+        }
+    }
+
+    @Override
+    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
+        switch (getItemViewType(position)) {
+            case ITEM_LOG:
+                ((ItemLogViewHolder) holder).bindContent(_items.get(position));
+                return;
+            case ITEM_BTN:
+                ((ItemBtnViewHolder) holder).bindContent(_bus);
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        return _items.size() + 1; // add 1 for paging button
+    }
+
+    private static class ItemLogViewHolder extends RecyclerView.ViewHolder {
+        ItemLogViewHolder(View itemView) {
+            super(itemView);
+        }
+
+        static ItemLogViewHolder create(ViewGroup parent) {
+            return new ItemLogViewHolder(LayoutInflater.from(parent.getContext())
+                  .inflate(R.layout.item_log, parent, false));
+        }
+
+        void bindContent(String content) {
+            ((TextView) itemView).setText(content);
+        }
+    }
+
+    static class ItemBtnViewHolder extends RecyclerView.ViewHolder {
+        ItemBtnViewHolder(View itemView) {
+            super(itemView);
+        }
+
+        static ItemBtnViewHolder create(ViewGroup parent) {
+            return new ItemBtnViewHolder(LayoutInflater.from(parent.getContext())
+                  .inflate(R.layout.item_btn, parent, false));
+        }
+
+        void bindContent(RxBus bus) {
+            ((Button) itemView).setText(R.string.btn_demo_pagination_more);
+            itemView.setOnClickListener(v -> bus.send(new ItemBtnViewHolder.PageEvent()));
+        }
+
+        static class PageEvent {
+        }
+    }
+}
diff --git a/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoFragment.java
@@ -29,7 +29,7 @@ public class PaginationAutoFragment
     @Bind(R.id.list_paging) RecyclerView _pagingList;
     @Bind(R.id.progress_paging) ProgressBar _progressBar;
 
-    private PaginationAdapter _adapter;
+    private PaginationAutoAdapter _adapter;
     private RxBus _bus;
     private PublishSubject<Integer> _paginator;
     private boolean _requestUnderWay = false;
@@ -54,7 +54,7 @@ public void onActivityCreated(@Nullable Bundle savedInstanceState) {
         layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
         _pagingList.setLayoutManager(layoutManager);
 
-        _adapter = new PaginationAdapter(_bus);
+        _adapter = new PaginationAutoAdapter(_bus);
         _pagingList.setAdapter(_adapter);
 
         _paginator = PublishSubject.create();
@@ -116,7 +116,7 @@ public void onStop() {
     private Observable<List<String>> _itemsFromNetworkCall(int start, int count) {
         return Observable.just(true)//
               .observeOn(AndroidSchedulers.mainThread())//
-              .delay(2, TimeUnit.SECONDS)//
+              .delay(2, TimeUnit.SECONDS)
               .map(dummy -> {
                   List<String> items = new ArrayList<>();
                   for (int i = 0; i < count; i++) {
