Support vod load more

app/src/main/java/com/fongmi/bear/bean/Result.java

@@ -20,6 +20,8 @@ import java.util.List;
 
 public class Result {
 
+    @SerializedName("page")
+    private String page;
     @SerializedName("class")
     private List<Class> types;
     @SerializedName("list")
@@ -39,6 +41,10 @@ public class Result {
         }
     }
 
+    public String getPage() {
+        return page;
+    }
+
     public List<Class> getTypes() {
         return types == null ? Collections.emptyList() : types;
     }

app/src/main/java/com/fongmi/bear/ui/custom/Scroller.java

@@ -0,0 +1,55 @@
+package com.fongmi.bear.ui.custom;
+
+import android.os.Handler;
+import android.util.Log;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+public class Scroller extends RecyclerView.OnScrollListener {
+
+    private final Callback callback;
+    private boolean loading;
+    private int page;
+
+    public Scroller(Callback callback) {
+        this.callback = callback;
+        this.page = 1;
+    }
+
+    @Override
+    public void onScrollStateChanged(@NonNull RecyclerView view, int newState) {
+        if (isLoading() || !isBottom(view) || newState != RecyclerView.SCROLL_STATE_IDLE) return;
+        setLoading(true); callback.onLoadMore(String.valueOf(++page));
+    }
+
+    private boolean isBottom(RecyclerView view) {
+        View lastChildView = view.getLayoutManager().getChildAt(view.getLayoutManager().getChildCount() - 1);
+        int lastChildBottom = lastChildView.getBottom();
+        int recyclerBottom = view.getBottom() - view.getPaddingBottom();
+        int lastPosition = view.getLayoutManager().getPosition(lastChildView);
+        return lastChildBottom == recyclerBottom && lastPosition == view.getLayoutManager().getItemCount() - 1;
+    }
+
+    public void reset() {
+        page = 1;
+    }
+
+    public boolean isLoading() {
+        return loading;
+    }
+
+    private void setLoading(boolean loading) {
+        this.loading = loading;
+    }
+
+    public void endLoading(boolean empty) {
+        new Handler().postDelayed(() -> setLoading(false), 1000);
+        if (empty) page--;
+    }
+
+    public interface Callback {
+        void onLoadMore(String page);
+    }
+}

app/src/main/java/com/fongmi/bear/ui/fragment/VodFragment.java

@@ -19,7 +19,9 @@ import com.fongmi.bear.databinding.FragmentVodBinding;
 import com.fongmi.bear.model.SiteViewModel;
 import com.fongmi.bear.ui.custom.CustomRowPresenter;
 import com.fongmi.bear.ui.custom.CustomSelector;
+import com.fongmi.bear.ui.custom.Scroller;
 import com.fongmi.bear.ui.presenter.FilterPresenter;
+import com.fongmi.bear.ui.presenter.ProgressPresenter;
 import com.fongmi.bear.ui.presenter.VodPresenter;
 import com.fongmi.bear.utils.ResUtil;
 import com.google.common.collect.Lists;
@@ -29,13 +31,14 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Objects;
 
-public class VodFragment extends Fragment {
+public class VodFragment extends Fragment implements Scroller.Callback {
 
     private HashMap<String, String> mExtend;
     private FragmentVodBinding mBinding;
     private SiteViewModel mSiteViewModel;
     private ArrayObjectAdapter mAdapter;
     private List<Filter> mFilters;
+    private Scroller mScroller;
 
     private String getTypeId() {
         return getArguments().getString("typeId");
@@ -73,9 +76,11 @@ public class VodFragment extends Fragment {
 
     private void setRecyclerView() {
         CustomSelector selector = new CustomSelector();
+        selector.addPresenter(String.class, new ProgressPresenter());
         selector.addPresenter(ListRow.class, new CustomRowPresenter(16), VodPresenter.class);
         selector.addPresenter(ListRow.class, new CustomRowPresenter(8), FilterPresenter.class);
         ItemBridgeAdapter adapter = new ItemBridgeAdapter(mAdapter = new ArrayObjectAdapter(selector));
+        mBinding.recycler.addOnScrollListener(mScroller = new Scroller(this));
         mBinding.recycler.setVerticalSpacing(ResUtil.dp2px(16));
         mBinding.recycler.setAdapter(adapter);
     }
@@ -83,6 +88,8 @@ public class VodFragment extends Fragment {
     private void setViewModel() {
         mSiteViewModel = new ViewModelProvider(this).get(SiteViewModel.class);
         mSiteViewModel.mResult.observe(getViewLifecycleOwner(), result -> {
+            mAdapter.remove("progress");
+            mScroller.endLoading(result.getList().isEmpty());
             for (List<Vod> items : Lists.partition(result.getList(), 5)) {
                 ArrayObjectAdapter adapter = new ArrayObjectAdapter(new VodPresenter());
                 adapter.addAll(0, items);
@@ -110,6 +117,7 @@ public class VodFragment extends Fragment {
     }
 
     private void getContent() {
+        mScroller.reset();
         getContent("1");
     }
 
@@ -118,4 +126,10 @@ public class VodFragment extends Fragment {
         if (clear) mAdapter.removeItems(mFilters.size(), mAdapter.size() - mFilters.size());
         mSiteViewModel.categoryContent(getTypeId(), page, true, mExtend);
     }
+
+    @Override
+    public void onLoadMore(String page) {
+        mAdapter.add("progress");
+        getContent(page);
+    }
 }

app/src/main/java/com/fongmi/bear/ui/presenter/ProgressPresenter.java

@@ -0,0 +1,32 @@
+package com.fongmi.bear.ui.presenter;
+
+import android.view.LayoutInflater;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.leanback.widget.Presenter;
+
+import com.fongmi.bear.databinding.AdapterProgressBinding;
+
+public class ProgressPresenter extends Presenter {
+
+    @Override
+    public Presenter.ViewHolder onCreateViewHolder(ViewGroup parent) {
+        return new ViewHolder(AdapterProgressBinding.inflate(LayoutInflater.from(parent.getContext()), parent, false));
+    }
+
+    @Override
+    public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object object) {
+    }
+
+    @Override
+    public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) {
+    }
+
+    public static class ViewHolder extends Presenter.ViewHolder {
+
+        public ViewHolder(@NonNull AdapterProgressBinding binding) {
+            super(binding.getRoot());
+        }
+    }
+}

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

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="16dp">
+
+    <include
+        layout="@layout/view_progress"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center" />
+
+</FrameLayout>