RecyclerView+viewPager导航栏

港控/mmm° 2022-05-19 23:22 190阅读 0赞

public class TabFragment extends Fragment { 
        RecyclerView recyclerView;
        ViewPager viewPager;
        ArrayList<String> list = new ArrayList();
        View view;
        @Nullable
        @Override
        public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
            view = inflater.inflate(R.layout.fragment_tab,container,false);
            initView();
            initData();
            return view;
        }
    
        @Override
        public void onActivityCreated(@Nullable Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);
    // initData();
        }
    
        public void initView() {
            recyclerView=  (RecyclerView)view.findViewById(R.id.recyclerView);
            viewPager=  (ViewPager)view.findViewById(R.id.viewPager);
        }
    
        public void initData() {
            list.add("tab1");
            list.add("tab2");
            list.add("tab3");
            list.add("tab4");
    
            LinearLayoutManager ms= new LinearLayoutManager(getActivity());
            ms.setOrientation(LinearLayoutManager.HORIZONTAL);//
            recyclerView.setLayoutManager(ms);
            recyclerView.setAdapter(new TabAdapter(getActivity(),list));
    
            recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
                @Override
                public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                    super.onScrollStateChanged(recyclerView, newState);
    // LinearLayoutManager manager = (LinearLayoutManager) recyclerView.getLayoutManager();
    // // 当不滑动时
    // if (newState == RecyclerView.SCROLL_STATE_IDLE) { 
    // // 获取最后一个完全显示的itemPosition
    // int lastItemPosition = manager.findLastCompletelyVisibleItemPosition();
    // int itemCount = manager.getItemCount();
    //
    //
    // // 判断是否滑动到了最后一个item，并且是向左滑动
    // if (lastItemPosition == (itemCount - 1) && isSlidingToLeft) { 
    //
    // // 加载更多
    // }
    // }
                    }
    
                @Override
                public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                    super.onScrolled(recyclerView, dx, dy);
                }
            });
    
            MyPagerAdapter myPageAdapter = new MyPagerAdapter(getFragmentManager());
            myPageAdapter.setData(FragmentFactory.createFragment());
            viewPager.setAdapter(myPageAdapter);
            viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
                @Override
                public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    
                }
    
                @Override
                public void onPageSelected(int position) {
                    recyclerView.smoothScrollToPosition(position);
    
                }
    
                @Override
                public void onPageScrollStateChanged(int state) {
    
                }
            });
        }
    
    }

R.layout.fragment\_tab

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent">
    
        <android.support.v7.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="match_parent" android:layout_height="wrap_content">
    
        </android.support.v7.widget.RecyclerView>
        <android.support.v4.view.ViewPager android:id="@+id/viewPager" android:layout_width="match_parent" android:layout_height="match_parent"/>
    </LinearLayout>

public class FragmentFactory {
       static ArrayList<Fragment> datas =new  ArrayList<Fragment>();
    
        public static ArrayList<Fragment> createFragment() {
    
    // for (int i=0;i<4;i++){ 
    // TestFragment mFragment = new TestFragment();
    // mFragment.setText("第"+i+"页");
    // datas.add(mFragment);
    // }
            datas.add(new TestFragment());
            datas.add(new Test2Fragment());
            datas.add(new Test3Fragment());
            datas.add(new Test4Fragment());
            return datas;
        }
    }

public class MyPagerAdapter extends FragmentPagerAdapter { 
    
        ArrayList<Fragment> datas;
        public void setData(ArrayList<Fragment> datas) {
            this.datas = datas;
        }
        public MyPagerAdapter(FragmentManager fm) {
            super(fm);
        }
        @Override
        public Fragment getItem(int position) {
            return datas == null ? null : datas.get(position);
        }
    
        @Override
        public int getCount() {
            return datas == null ? 0 : datas.size();
        }
    
    
    }

public class TabAdapter extends RecyclerView.Adapter<TabAdapter.ViewHolder> { 
        private Context context;
        private ArrayList<String> mDatas;
    
    
        public TabAdapter(Context context, ArrayList<String> mDatas) {
            super();
            this.context = context;
            this.mDatas = mDatas;
    
        }
    
        @Override
        public TabAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            ViewHolder holder = new ViewHolder(LayoutInflater.from(context).inflate(R.layout.layout_recycler_item, parent, false));
    
            return holder;
        }
    
        @Override
        public void onBindViewHolder(TabAdapter.ViewHolder holder, int position) {
            holder.tabLayout.setTextView(mDatas.get(position));
    
        }
    
        @Override
        public int getItemCount() {
            return mDatas.size();
        }
    
        class ViewHolder extends RecyclerView.ViewHolder{ 
            TabLayout tabLayout;
            public ViewHolder(View itemView){
                super(itemView);
                tabLayout = (TabLayout)itemView.findViewById(R.id.tablelayout);
            }
        }
    }

public class TestFragment extends Fragment { 
    
        View view;
        TextView tv;
    
        @Nullable
        @Override
        public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
           view = inflater.inflate(R.layout.fragment_test,container,false);
           initView();
           initData();
            return view;
    
        }
    
        @Override
        public void onActivityCreated(@Nullable Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);
        }
    
        private void initView() {
           tv =  view.findViewById(R.id.test_tv);setText("第一页");
        }
    
        public void setText(String str){
            tv.setText(str);
        }
        private void initData() {
        }
    }

layout\_recycler\_item.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout android:id="@+id/item_table" xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="37dip">
    
        <com.example.jxl.myapplication.TabLayout android:id="@+id/tablelayout" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
    </LinearLayout>

layout\_table.xml