完善搜索功能模块

common/src/main/java/com/yunbao/common/views/weight/OnBottomListener.java

@@ -0,0 +1,8 @@
+package com.yunbao.common.views.weight;
+
+/**
+ * 滚动到底部的监听
+ */
+public interface OnBottomListener {
+    void onBottom();
+}

common/src/main/java/com/yunbao/common/views/weight/OnRecyclerViewScrollListener.java

@@ -0,0 +1,92 @@
+package com.yunbao.common.views.weight;
+
+import androidx.recyclerview.widget.GridLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import androidx.recyclerview.widget.StaggeredGridLayoutManager;
+
+public class OnRecyclerViewScrollListener extends RecyclerView.OnScrollListener implements OnBottomListener {
+
+    public enum LAYOUT_MANAGER_TYPE {
+        LINEAR,
+        GRID,
+        STAGGERED_GRID
+    }
+    /* LayoutManager的类型（枚举）*/
+    protected LAYOUT_MANAGER_TYPE mLayoutManagerType;
+    /*存储瀑布流每一列最下面的那个item的位置*/
+    private int[] mLastPositions;
+    /*最后一个可见的item的位置*/
+    private int mLastVisibleItemPosition;
+    /*记录当前滑动的状态*/
+    private int mCurrentScrollState = 0;
+    /*用于判断滑动方向，dy等于0，表示RecyclerView没有滑动，比如条目没充满RecyclerView的话，手势不管哪个方向滑都是0；dy大于0，RecyclerView向上滑动；dy小于0 ，RecyclerView向下滑动*/
+    private int mDy;
+
+    @Override
+    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+        super.onScrolled(recyclerView, dx, dy);
+        this.mDy = dy;
+        RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
+        if (mLayoutManagerType == null) {
+            if (layoutManager instanceof LinearLayoutManager) {
+                mLayoutManagerType = LAYOUT_MANAGER_TYPE.LINEAR;
+            } else if (layoutManager instanceof GridLayoutManager) {
+                mLayoutManagerType = LAYOUT_MANAGER_TYPE.GRID;
+            } else if (layoutManager instanceof StaggeredGridLayoutManager) {
+                mLayoutManagerType = LAYOUT_MANAGER_TYPE.STAGGERED_GRID;
+            } else {
+                throw new RuntimeException("Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
+            }
+        }
+
+        switch (mLayoutManagerType) {
+            case LINEAR:
+                mLastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
+                break;
+            case GRID:
+                mLastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
+                break;
+            case STAGGERED_GRID:
+                StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
+                if (mLastPositions == null) {
+                    mLastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
+                }
+                staggeredGridLayoutManager.findLastVisibleItemPositions(mLastPositions);
+                mLastVisibleItemPosition = findMax(mLastPositions);
+                break;
+        }
+
+    }
+
+
+    @Override
+    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
+        super.onScrollStateChanged(recyclerView, newState);
+        mCurrentScrollState = newState;
+        RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
+        int visibleItemCount = layoutManager.getChildCount();
+        int totalItemCount = layoutManager.getItemCount();
+        if (visibleItemCount > 0
+                && mCurrentScrollState == RecyclerView.SCROLL_STATE_IDLE
+                && mLastVisibleItemPosition >= totalItemCount - 1 && mDy > 0) {
+            onBottom();
+        }
+    }
+
+
+    @Override
+    public void onBottom() {
+
+    }
+
+    private int findMax(int[] lastPositions) {
+        int max = lastPositions[0];
+        for (int value : lastPositions) {
+            if (value > max) {
+                max = value;
+            }
+        }
+        return max;
+    }
+}

main/src/main/java/com/yunbao/main/adapter/SearchResultsItemAdapter.java

@@ -100,4 +100,12 @@ public class SearchResultsItemAdapter extends RecyclerView.Adapter {
         }
         notifyDataSetChanged();
     }
+
+    /**
+     * 加载更多资源
+     */
+    public void onLoadMoreData(List<List<SearchModel>> mLists) {
+        lists.addAll(mLists);
+        notifyDataSetChanged();
+    }
 }

main/src/main/java/com/yunbao/main/fragment/SearchResultsItemFragment.java

@@ -14,6 +14,7 @@ import com.yunbao.common.fragment.BaseFragment;
 import com.yunbao.common.http.base.HttpCallback;
 import com.yunbao.common.http.main.MainNetManager;
 import com.yunbao.common.utils.ToastUtil;
+import com.yunbao.common.views.weight.OnRecyclerViewScrollListener;
 import com.yunbao.main.R;
 import com.yunbao.main.adapter.SearchResultsItemAdapter;
 import com.yunbao.main.utils.WordsTypeUtil;
@@ -27,6 +28,7 @@ import java.util.List;
 public class SearchResultsItemFragment extends BaseFragment {
     private String searchKey = "";
     private int page = 1;
+    private int type = 1;
     private RecyclerView searchList;
     private SearchResultsItemAdapter itemAdapter;
 
@@ -46,6 +48,13 @@ public class SearchResultsItemFragment extends BaseFragment {
         itemAdapter = new SearchResultsItemAdapter();
         searchList.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));
         searchList.setAdapter(itemAdapter);
+        searchList.addOnScrollListener(new OnRecyclerViewScrollListener() {
+            @Override
+            public void onBottom() {
+                page = page + 1;
+                setSearchKey(searchKey, type);
+            }
+        });
     }
 
     @Override
@@ -64,6 +73,7 @@ public class SearchResultsItemFragment extends BaseFragment {
         LoadingDialog fragment = new LoadingDialog();
         fragment.show(getChildFragmentManager(), "LoadingDialog");
         this.searchKey = searchKey;
+        this.type = type;
         if (type == 1) {
             MainNetManager.get(getActivity())
                     .search(WordsTypeUtil.changeSimplified(searchKey),
@@ -71,7 +81,11 @@ public class SearchResultsItemFragment extends BaseFragment {
                             type, page, new HttpCallback<List<List<SearchModel>>>() {
                                 @Override
                                 public void onSuccess(List<List<SearchModel>> data) {
+                                    if (page > 1) {
+                                        itemAdapter.onLoadMoreData(data);
+                                    } else {
                                         itemAdapter.showData(data, type);
+                                    }
                                     fragment.dismiss();
                                 }
 
@@ -88,9 +102,18 @@ public class SearchResultsItemFragment extends BaseFragment {
                             type, page, new HttpCallback<List<SearchModel>>() {
                                 @Override
                                 public void onSuccess(List<SearchModel> data) {
+                                    if (data.size() == 0) {
+                                        ToastUtil.show(R.string.refresh_footer_nothing);
+                                    } else {
                                         List<List<SearchModel>> listList = new ArrayList<>();
                                         listList.add(data);
+                                        if (page > 1) {
+                                            itemAdapter.onLoadMoreData(listList);
+                                        } else {
                                             itemAdapter.showData(listList, type);
+                                        }
+                                    }
+
                                     fragment.dismiss();
                                 }