RecycleView的相关监听

添加RecycleView依赖

compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'

activity_main.xml布局中：

<android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeRefresh"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            >

        </android.support.v7.widget.RecyclerView>

    </android.support.v4.widget.SwipeRefreshLayout>

定义footerview 的布局

定义headerVIew 的布局

多条目中布局1

<TextView
        android:id="@+id/tvContent"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="10dp"
        android:textSize="25sp"
        android:background="#ff0"
        android:text="哈哈哈"/>
多条目中布局2

MyAdapter中的代码

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private Context context;
    private List<String> list;
    /**
     * 添加HEADER类型
     */
    private static final int TYPE_HEADER = 0;
    //Footer RecyclerView底部的一个View
    private static final int TYPE_FOOTER = 1;
    //RecyclerView 的条目
    private static final int TYPE_ITEM = 2;
    /**
     * 多种条目加载的第二种
     */
    private static final int TYPE_ITEM2 = 3;

    public MyAdapter(Context context, List<String> list){
        this.context = context;
        this.list = list;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        //viewType = 0 Header viewType = 1 footer
        if(viewType == TYPE_HEADER){//HEADER
            View headerView = LayoutInflater.from(context).inflate(R.layout.header,parent,false);
            return new VHHeader(headerView);
        }else if(viewType == TYPE_FOOTER){//Footer
            View footerView = LayoutInflater.from(context).inflate(R.layout.footer,parent,false);
            return new VHFooter(footerView);
        }else if(viewType == TYPE_ITEM) {//ITEM 条目
            View itemView = LayoutInflater.from(context).inflate(R.layout.item, parent, false);
            return new VHItem(itemView);
        }else if(viewType == TYPE_ITEM2){
            View itemView2 = LayoutInflater.from(context).inflate(R.layout.item2, parent, false);
            return new VHItem(itemView2);
        }
        return null;
    }

    //定义条目点击事件的回调接口
    public interface OnItemClickListener{

        //提供一个条目点击事件的方法
        void onItemClick(View view,int position);
        //提供一个条目长按事件
        void onItemLongClick(View view,int position);

    }
    private OnItemClickListener onItemClickListener;
    //设置条目监听事件
    public void setOnItemClick(OnItemClickListener onItemClickListener){
            this.onItemClickListener = onItemClickListener;
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {

        if(holder instanceof VHHeader){
            return;
        }else if(holder instanceof VHFooter){
            return;
        }else if(holder instanceof VHItem) {
            //将数据绑定到控件上
            VHItem itemHolder = (VHItem) holder;
            //设置文本
            //0 ,1,2
            itemHolder.tvContent.setText("嘻嘻 : "+list.get(position - 1));
        }else if(holder instanceof VHItem2){
            VHItem2 itemHolder2 = (VHItem2) holder;
            itemHolder2.tvContent.setText("呵呵 - > "+list.get(position - 1));
        }

        //设置条目的点击事件与长按事件
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //得到条目位置
                int position = holder.getLayoutPosition();
                //将点击事件信息回调回去
                onItemClickListener.onItemClick(holder.itemView,position);
            }
        });

        //长按
        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                //得到条目位置
                int position = holder.getLayoutPosition();
                //将点击事件信息回调回去
                onItemClickListener.onItemLongClick(holder.itemView,position);

                return true;//长按事件优先于点击事件
            }
        });

    }

    /**
     * 加载更多
     */
    public void loadMore(List<String> dataList){
        for (String str : dataList){
            list.add(str);
        }
        //更新界面
        notifyDataSetChanged();

    }

    @Override
    public int getItemCount() {
        return list.size() + 2;
    }

    @Override
    public int getItemViewType(int position) {

        //定义每个条目展示的是什么类型的View
        if(position == 0){
            return TYPE_HEADER;
        }else if(position == getItemCount() - 1){
            return TYPE_FOOTER;
        }else if(position %2 == 0){
            return TYPE_ITEM2;
        }else return TYPE_ITEM;
    }
    //Header 的ViewHolder
    private class VHHeader extends RecyclerView.ViewHolder{

        public VHHeader(View itemView) {
            super(itemView);
        }

    }

    //Footer VIEW 的 Holder
    private class VHFooter extends RecyclerView.ViewHolder{

        public VHFooter(View itemView) {
            super(itemView);
        }
    }

    //条目Holder
    private class VHItem extends RecyclerView.ViewHolder{

        TextView tvContent;
        public VHItem(View itemView) {
            super(itemView);

            tvContent = (TextView) itemView.findViewById(R.id.tvContent);
        }
    }

    //条目Holder
    private class VHItem2 extends RecyclerView.ViewHolder{

        TextView tvContent;
        public VHItem2(View itemView) {
            super(itemView);
            tvContent = (TextView) itemView.findViewById(R.id.tvContent);
        }
    }

下面就看看MainActivity的代码

public class MainActivity extends AppCompatActivity implements MyAdapter.OnItemClickListener, SwipeRefreshLayout.OnRefreshListener {

    private RecyclerView recyclerView;
    private List<String> lists;
    private MyAdapter adapter;
    private SwipeRefreshLayout swipeRefreshLayout;
    private LinearLayoutManager linearLayoutManager;
    /**
     * 是否拉到底部了
     */
    private boolean isLast;
    private ProgressBar progressBar;

    private Handler handler = new Handler();
    private int lastVisibleItemPosition;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initData();
        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        //找到实现下拉这个控件
        swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefresh);

        //找到进度条控件
        //progressBar = (ProgressBar) findViewById(R.id.progressBar);

        //创建一个线性的管理器
        linearLayoutManager = new LinearLayoutManager(this);
        //设置布局管理器
        recyclerView.setLayoutManager(linearLayoutManager);
        adapter = new MyAdapter(this,lists);
        //设置适配器
        recyclerView.setAdapter(adapter);
        //设置条目分割线
        recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
        //设置条目监听事件
        adapter.setOnItemClick(this);

        //实现下拉监听
        swipeRefreshLayout.setOnRefreshListener(this);
        //更改背景的颜色
        swipeRefreshLayout.setProgressBackgroundColorSchemeColor
                (getResources().getColor(android.R.color.holo_red_dark));
        //设置旋转箭头颜色变更
        swipeRefreshLayout.setColorSchemeResources(android.R.color.holo_blue_dark,android.R.color.holo_green_light,
                android.R.color.holo_orange_dark);

        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {

            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);

                //监听滚动状态 IDEL 静止手指滑动   惯性滑动

                if(lastVisibleItemPosition + 1 ==
                        adapter.getItemCount() && newState == RecyclerView.SCROLL_STATE_IDLE){

                    handler.postDelayed(new Runnable() {
                        @Override
                        public void run() {

                            List<String> myList = new ArrayList<String>();
                            for (int i = 0;i < 10;++i){

                                myList.add("JAVA ,你去死"+i);

                            }

                            //将网络请求过来的数据更新到界面上
                            adapter.loadMore(myList);

                        }
                    },3000);

                }

               /* switch (newState){
                    case RecyclerView.SCROLL_STATE_IDLE:
                    {
                        Log.d("MainActivity", "静止");

                        if(isLast){
                            //模拟的我网络请求的数据
                            handler.postDelayed(new Runnable() {
                                @Override
                                public void run() {

                                    List<String> myList = new ArrayList<String>();
                                    for (int i = 0;i < 10;++i){

                                        myList.add("JAVA ,你去死"+i);

                                    }

                                    //将网络请求过来的数据更新到界面上
                                    adapter.loadMore(myList);

                                }
                            },3000);

                        }*/

                        //处理数据
                        /*if(!isLast){
                            //加载更多
                            //显示ProgressBar
                            Log.d("MainActivity", "静止----");
                            progressBar.setVisibility(View.VISIBLE);
                            handler.postDelayed(new Runnable() {
                                @Override
                                public void run() {

                                    //隐藏进度条
                                    progressBar.setVisibility(View.GONE);
                                }
                            },3000);
                        }

                    }
                    case RecyclerView.SCROLL_STATE_DRAGGING://用户手指滑动
                    {

                    }
                        break;
                    case RecyclerView.SCROLL_STATE_SETTLING://惯性滑动
                    {

                    }
                        break;
                }*/

            }

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);

                //最后一个可见条目
                lastVisibleItemPosition = linearLayoutManager.findLastVisibleItemPosition();

                //得到屏幕中可见的第一个条目
                //int firstVisibleItemPosition = linearLayoutManager.findFirstVisibleItemPosition();
                /*
                //应该得到recyclerView的总条目数
                int totalItemCount = linearLayoutManager.getItemCount();

                Log.d("MainActivity", "第一个可见条目 : " + firstVisibleItemPosition +
                        "最后一个可见条目　：　" + lastVisibleItemPosition+" 总条目数 : "
                        +totalItemCount);

                if((firstVisibleItemPosition + lastVisibleItemPosition) == totalItemCount){
                    //滑动到了底部
                    Log.d("MainActivity", "滑动到底部了");

                    isLast = true;
                }else{
                    //没有滑动到底部
                    Log.d("MainActivity", "没有滑动到底部");
                    isLast = false;
                }*/

            }

        });

    }

    /**
     * 初始化数据
     */
    private void initData() {
        //JDK 8 语法菱形
        lists = new ArrayList<>();
        for (int i = 0; i < 10; ++i){
            lists.add("Hello World - "+i);
        }

    }

    @Override
    public void onItemClick(View view, int position) {

        Toast.makeText(this, "条目点击位置 : " + position, Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onItemLongClick(View view, int position) {

        Toast.makeText(this, "条目长按事件 -> " + position, Toast.LENGTH_SHORT).show();

    }

    @Override
    public void onRefresh() {
        //当下拉的时候会被调用
        Log.d("MainActivity", "下拉了");

    }
}

}

RecycleView的相关监听

猜你喜欢