Android RecycleView分组

 效果图

1、导入第三方库

implementation 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.49'

2、XML布局
分组标题：

navigation_righthead.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorGray"
    android:orientation="vertical">

    <TextView
        android:id="@+id/navigation_rightHead"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="10dp"
        android:singleLine="true"
        android:textColor="@color/colorBlack"
        android:textSize="16sp" />
</LinearLayout>

分组文本：
navigation_right.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/navigation_txt_rightTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

3、实体类 （Navigation）

继承SectionEntity

public class Navigation extends SectionEntity<Navigation.NavigationItem> {

    public Navigation(boolean isHeader, String header) {
        super(isHeader, header);
    }

    public Navigation(NavigationItem bean) {
        super(bean);
    }

    public static class NavigationItem {
        private String title;
        private String link;

        public NavigationItem(String title) {
            this.title = title;
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public String getLink() {
            return link;
        }

        public void setLink(String link) {
            this.link = link;
        }
    }
}

3、适配器（NavigationRghtAdapter）

继承 （BaseSectionQuickAdapter）

public class NavigationRightAdapter extends BaseSectionQuickAdapter<Navigation, BaseViewHolder> {

    public NavigationRightAdapter(int layoutResId, int sectionHeadResId, List<Navigation> data) {
        super(layoutResId, sectionHeadResId, data);
    }

    @Override
    protected void convertHead(BaseViewHolder helper, Navigation item) {
        helper.setText(R.id.navigation_rightHead, item.header);
    }

    @Override
    protected void convert(@NonNull BaseViewHolder helper, Navigation item) {
        Navigation.NavigationItem t = item.t;
        helper.setText(R.id.navigation_txt_rightTitle, t.getTitle());
    }
}

4、NavigationFragment（碎片）

public class NavigationFragment extends Fragment {
    private View view;
    private List<Navigation> navigationList;//右边数据
    private RecyclerView recyclerView;
    private NavigationRightAdapter rightAdapter;
    private GridLayoutManager gridLayoutManager;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_navigation, container, false);
        initData();
        initRight();
        return view;
    }

    //获取数据
    private void initData() {
        navigationList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            navigationList.add(new Navigation(true, "标题" + i));
            navigationList.add(new Navigation(new Navigation.NavigationItem("数据")));
            navigationList.add(new Navigation(new Navigation.NavigationItem("数据")));
            navigationList.add(new Navigation(new Navigation.NavigationItem("数据")));
        }
    }

    private void initRight() {
        gridLayoutManager = new GridLayoutManager(getContext(), 2);
        recyclerView=view.findViewById(R.id.navigation_recycle_right);
        if (rightAdapter == null) {
            rightAdapter = new NavigationRightAdapter(R.layout.navigation_right, R.layout.navigation_righthead, null);
            recyclerView.setLayoutManager(gridLayoutManager);

            recyclerView.setAdapter(rightAdapter);
        } else {
            rightAdapter.notifyDataSetChanged();
        }
        rightAdapter.setNewData(navigationList);
        rightAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                if (navigationList.get(position).isHeader) {
                    Toast.makeText(getContext(), "你点击了1" + navigationList.get(position).header, Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(getContext(), "你点击了" + navigationList.get(position).t.getTitle(), Toast.LENGTH_SHORT).show();

                }
            }
        });
    }

}