RecyclerView 的使用

RecyclerView在android5.0之后被引进，可以通过导入support-v7对其进行使用。 
据官方的介绍，该控件用于在有限的窗口中展示大量数据集。提供了一种插拔式的体验，高度的解耦，异常的灵活，
通过设置它提供的不同LayoutManager，ItemDecoration , ItemAnimator实现令人瞠目的效果。
• 你想要控制其显示的方式，请通过布局管理器LayoutManager
• 你想要控制Item间的间隔（可绘制），请通过ItemDecoration
• 你想要控制Item增删的动画，请通过ItemAnimator

• 你想要控制点击、长按事件，请自己写

1 .RecyclerView的基本展示 

public class RecycleerActivity01 extends AppCompatActivity {    private RecyclerView recyclerView;    private List<String> mdatas;    private BasicAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_recycleer01);        recyclerView = (RecyclerView) findViewById(R.id.id_rv);        //数据源        initData();        //想recycleView中添加数据，使用适配器        adapter = new BasicAdapter(mdatas, this);        recyclerView.setAdapter(adapter);        //声明布局管理器，设置RecycleView最终展示的效果,最后一个参数是是否反转数据        LinearLayoutManager manager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);        //设置增加条目的动画        recyclerView.setItemAnimator(new DefaultItemAnimator());        adapter.setOnItemClickListener(new BasicAdapter.OnItemClickListener1() {            @Override            public void onItemClick(View itemView, int position) {                Toast.makeText(RecycleerActivity01.this, "你点击了" + mdatas.get(position), Toast.LENGTH_SHORT).show();            }            @Override            public void onLongItemClick(View itemView, int position) {                Toast.makeText(RecycleerActivity01.this, "你长按点击了" + mdatas.get(position), Toast.LENGTH_SHORT).show();            }        });    }    private void initData() {        mdatas = new ArrayList<>();        for (int i = 0; i < 48; i++) {            mdatas.add("第" + i + "条数据");        }    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.main, menu);        return super.onCreateOptionsMenu(menu);    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        switch (item.getItemId()) {            case R.id.add:                adapter.addData(1);                break;            case R.id.delete:                adapter.removeData(1);            case R.id.diplay_lv:                LinearLayoutManager manget = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);                recyclerView.setLayoutManager(manget);                break;            case R.id.diplay_gv:                GridLayoutManager manage = new GridLayoutManager(this, 3);                recyclerView.setLayoutManager(manage);                break;            case R.id.diplay_hlv:                StaggeredGridLayoutManager ma = new StaggeredGridLayoutManager(1, StaggeredGridLayoutManager.HORIZONTAL);                recyclerView.setLayoutManager(ma);                break;            case R.id.diplay_hgv:                StaggeredGridLayoutManager mm = new StaggeredGridLayoutManager(5, StaggeredGridLayoutManager.HORIZONTAL);                recyclerView.setLayoutManager(mm);                break;            case R.id.diplay_staggered:                Intent intent = new Intent(this, StaggeredActivity.class);                startActivity(intent);                break;        }        return super.onOptionsItemSelected(item);    }

public class BasicAdapter extends RecyclerView.Adapter<BasicAdapter.BasicViewHolder> {    private List<String> mdatas;    private Context context;    private OnItemClickListener1 listener;//使用RecyclerView，你想要控制点击、长按事件，需要自写    public BasicAdapter(List<String> mdatas, Context context) {        this.mdatas = mdatas;        this.context = context;    }    public void setOnItemClickListener(OnItemClickListener1 listener) {        this.listener = listener;    }    public interface OnItemClickListener1 {        public void onItemClick(View itemView, int position);        public void onLongItemClick(View itemView, int position);    }    //创建一个viewholder 并且返回出去    @Override    public BasicViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View itemView = LayoutInflater.from(context).inflate(R.layout.item_recycle01, parent, false);        BasicViewHolder holder = new BasicViewHolder(itemView);        return holder;    }    //绑定viewholder 在这个方法中，完成赋值操作    @Override    public void onBindViewHolder(BasicViewHolder holder, int position) {        holder.tv.setText(mdatas.get(position));        setUpEvent(holder);    }    protected void setUpEvent(final BasicViewHolder holder) {        if (listener != null) {            holder.itemView.setOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View view) {                        int pos = holder.getLayoutPosition();                        listener.onItemClick(holder.itemView, pos);                    }            });            holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {                @Override                public boolean onLongClick(View v) {                    int position = holder.getLayoutPosition();                    listener.onLongItemClick(holder.itemView, position);                    return false;                }            });        }    }    public void addData(int pos) {        mdatas.add(pos, "insert one");        notifyItemChanged(pos);    }    public void removeData(int pos) {        mdatas.remove(pos);        notifyItemRemoved(pos);    }    @Override    public int getItemCount() {        return mdatas.size();    }    class BasicViewHolder extends RecyclerView.ViewHolder {        TextView tv;        public BasicViewHolder(View itemView) {            super(itemView);            tv = (TextView) itemView.findViewById(R.id.id_tv1);        }    }}

<?xml version="1.0" encoding="utf-8"?><menu xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto">    <item        android:id="@+id/add"        android:icon="@android:drawable/ic_menu_add"        android:orderInCategory="100"        android:title="add"        app:showAsAction="always"></item>    <item        android:id="@+id/delete"        android:icon="@android:drawable/ic_menu_delete"        android:orderInCategory="100"        android:title="remove"        app:showAsAction="always"></item>    <item        android:id="@+id/comment"        android:orderInCategory="100"        android:title="展示类型"        app:showAsAction="always">        <menu>            <item                android:id="@+id/diplay_lv"                android:orderInCategory="100"                android:title="just like ListView"></item>            <item                android:id="@+id/diplay_gv"                android:orderInCategory="100"                android:title="just like GridView"></item>            <item                android:id="@+id/diplay_hlv"                android:orderInCategory="100"                android:title="Horizontal ListView"></item>            <item                android:id="@+id/diplay_hgv"                android:orderInCategory="100"                android:title="Horizontal GridView"></item>            <item                android:id="@+id/diplay_staggered"                android:orderInCategory="100"                android:title="Staggered View"></item>        </menu>    </item></menu>

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

2.RecyclerView的切换展示

public class RecycleerActivity02 extends AppCompatActivity {    private String url = "http://appsrv.flyxer.com/api/digest/recomm/dests?page=1";    private RecyclerView recyclerView;    private listAdapter adapter;    private GridAdapter gridAdapter;    private Context context;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_recycleer01);        recyclerView = (RecyclerView) findViewById(R.id.id_rv);        context = this;        loadData(url);    }    private void loadData(String url) {        RequestParams params = new RequestParams(url);        x.http().get(params, new Callback.CommonCallback<String>() {            @Override            public void onSuccess(String result) {                List<ParseRootData.RootData> rootbean = ParseRootData.parseData(result);                adapter = new listAdapter(context, rootbean);                gridAdapter = new GridAdapter(context, rootbean);                recyclerView.setAdapter(adapter);                LinearLayoutManager manager = new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false);                recyclerView.setLayoutManager(manager);            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public void onFinished() {            }        });    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.country, menu);        return super.onCreateOptionsMenu(menu);    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        switch (item.getItemId()) {            case R.id.list:                recyclerView.setAdapter(adapter);                LinearLayoutManager manager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);                recyclerView.setLayoutManager(manager);                break;            case R.id.grid:                recyclerView.setAdapter(gridAdapter);                GridLayoutManager man = new GridLayoutManager(this, 2);                recyclerView.setLayoutManager(man);                break;        }        return super.onOptionsItemSelected(item);    }}

3 .RecyclerView的照片墙展示 瀑布流，高度不同

public class RecycleerActivity03 extends AppCompatActivity {    private RecyclerView recyclerView;    private PhotoWallAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_recycleer01);        recyclerView = (RecyclerView) findViewById(R.id.id_rv);        adapter = new PhotoWallAdapter(RecycleerActivity03.this);        recyclerView.setAdapter(adapter);        StaggeredGridLayoutManager manager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL);        recyclerView.setLayoutManager(manager);    }}

public class PhotoWallAdapter extends RecyclerView.Adapter<PhotoWallAdapter.PhotoViewHolder> {    private Context context;    private List<Integer> mHeight;    private String imgUrls[];    public PhotoWallAdapter(Context context) {        this.context = context;        imgUrls = ImageUrls.imageurls;        mHeight = new ArrayList<>();        for (int i = 0; i < imgUrls.length; i++) {            mHeight.add((int)(300+Math.random()*400));        }    }    @Override    public PhotoViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View itemView = LayoutInflater.from(context).inflate(R.layout.item_stagger,parent,false);        PhotoViewHolder holder = new PhotoViewHolder(itemView);        return holder;    }    @Override    public void onBindViewHolder(PhotoViewHolder holder, int position) {        ViewGroup.LayoutParams lp = holder.iv.getLayoutParams();        lp.height = mHeight.get(position);        holder.iv.setLayoutParams(lp);        ImageOptions options = new ImageOptions.Builder().setFailureDrawableId(R.mipmap.ic_launcher)                .setLoadingDrawableId(R.mipmap.ic_launcher).build();        x.image().bind(holder.iv,imgUrls[position],options);    }    @Override    public int getItemCount() {        return imgUrls.length;    }    class PhotoViewHolder extends RecyclerView.ViewHolder{        ImageView iv;        public PhotoViewHolder(View itemView) {            super(itemView);            iv = (ImageView)itemView.findViewById(R.id.id_iv);        }    }}

4.RecyclerView的本地数据分页加载 含下拉刷新和上拉加载

public class RecycleerActivity04 extends AppCompatActivity {    private RecyclerView recyclerView;    private SwipeRefreshLayout swipeRefreshLayout;    private List<Map<String, String>> datas;    private LinearLayoutManager manager;    private RecyclerAdapter4 adapter;    private boolean isLoading = false;//判断是否处于上拉加载的状态    private Handler handler = new Handler();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_recycleer04);        initView();        setEvent();    }    private void initView() {        recyclerView = (RecyclerView) findViewById(R.id.id_rv);        swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.sr1);        swipeRefreshLayout.setColorSchemeColors(Color.RED, Color.GREEN);        manager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);        recyclerView.setLayoutManager(manager);        datas = new ArrayList<>();        getData();        adapter = new RecyclerAdapter4(this, datas);        recyclerView.setAdapter(adapter);    }    private void setEvent() {        //设置下拉刷新的操作        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                handler.postDelayed(new Runnable() {                    @Override                    public void run() {                        datas.clear();                        getData();                        adapter.notifyDataSetChanged();                        swipeRefreshLayout.setRefreshing(false);                    }                }, 3000);            }        });//设置上拉加载的监听器        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {            @Override            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {                super.onScrollStateChanged(recyclerView, newState);            }            @Override            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {                super.onScrolled(recyclerView, dx, dy);                //获得可见条目的最后一条位置                int lastVisibleItemPosition = manager.findLastVisibleItemPosition();                if (lastVisibleItemPosition + 1 == adapter.getItemCount()) {                    boolean isRefresh = swipeRefreshLayout.isRefreshing();                    if (isRefresh) {                        return;                    }                    if (!isLoading) {                        isLoading = true;                        //没有处于加载状态，需要加载数据，就可以进行分页加载                        handler.postDelayed(new Runnable() {                            @Override                            public void run() {                                getData();                                adapter.notifyDataSetChanged();                                adapter.notifyItemRemoved(adapter.getItemCount());                                isLoading = false;                            }                        }, 4000);                    }                }            }        });    }    private void getData() {        int size = datas.size();        for (int i = 0; i < 20; i++) {            Map<String, String> map = new HashMap<>();            map.put("title", "title======" + (i + size));            map.put("summary", "summary----" + (i + size));            datas.add(map);        }    }}

public class RecyclerAdapter4 extends RecyclerView.Adapter<RecyclerView.ViewHolder> {    private Context context;    private List<Map<String, String>> mDatas;    private final int TYPE_COMMON = 0;    private final int TYPE_FOOTER = 1;    public RecyclerAdapter4(Context context, List<Map<String, String>> mDatas) {        this.context = context;        this.mDatas = mDatas;    }    /**     * 获得指定的位置上的显示类型     */    @Override    public int getItemViewType(int position) {        if (position == getItemCount() - 1) {            return TYPE_FOOTER;        }        return TYPE_COMMON;    }    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        if (viewType == TYPE_COMMON) {            View itemView = LayoutInflater.from(context).inflate(R.layout.item_recycler04, parent, false);            ItemViewHolder itemViewHolder = new ItemViewHolder(itemView);            return itemViewHolder;        } else {            View footerView = LayoutInflater.from(context).inflate(R.layout.item_footer, parent, false);            FooterViewHolder holder = new FooterViewHolder(footerView);            return holder;        }    }    @Override    public int getItemCount() {        return mDatas.size() == 0 ? 0 : mDatas.size() + 1;    }    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {        if (holder instanceof ItemViewHolder) {            ((ItemViewHolder) holder).tv_name.setText(mDatas.get(position).get("title"));            ((ItemViewHolder) holder).tv_summary.setText(mDatas.get(position).get("summary"));        }    }    class ItemViewHolder extends RecyclerView.ViewHolder {        TextView tv_name, tv_summary;        public ItemViewHolder(View itemView) {            super(itemView);            tv_name = (TextView) itemView.findViewById(R.id.tv_name);            tv_summary = (TextView) itemView.findViewById(R.id.tv_summary);        }    }    class FooterViewHolder extends RecyclerView.ViewHolder {        public FooterViewHolder(View itemView) {            super(itemView);        }    }}

5. RecyclerView的网络 数据分页加载

public class RecycleerActivity05 extends AppCompatActivity {    private String url = "http://www.qubaobei.com/ios/cf/dish_list.php?stage_id=1&limit=20&page=";    private int page = 1;    private RecyclerView mRecyclerView;    private SwipeRefreshLayout swipeRefreshLayout;    private List<ParseFoodData.Food> mDatas;    private LinearLayoutManager manager;    private FoodAdapter adapter;    private boolean isLoading = false;    Handler handler = new Handler();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_recycleer04);        initView();        loadData(url, 1);        setEvent();    }    private void initView() {        mRecyclerView = (RecyclerView) findViewById(R.id.id_rv);        swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.sr1);        swipeRefreshLayout.setColorSchemeColors(Color.RED, Color.GREEN);        manager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);        mRecyclerView.setLayoutManager(manager);        mDatas = new ArrayList<>();        adapter = new FoodAdapter(this, mDatas);        mRecyclerView.setAdapter(adapter);    }    private void loadData(String url, int index) {        RequestParams params = new RequestParams(url + index);        x.http().get(params, new Callback.CommonCallback<String>() {            @Override            public void onSuccess(String result) {                List<ParseFoodData.Food> list = ParseFoodData.parseData(result);                if (list != null && list.size() != 0) {                    mDatas.addAll(list);                    page++;                    adapter.notifyDataSetChanged();                    isLoading = false;                } else {                    adapter.notifyItemRemoved(adapter.getItemCount());                }            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public void onFinished() {            }        });    }    private void setEvent() {        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                handler.postDelayed(new Runnable() {                    @Override                    public void run() {                        swipeRefreshLayout.setRefreshing(false);                    }                }, 2000);            }        });        mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {            @Override            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {                super.onScrollStateChanged(recyclerView, newState);            }            @Override            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {                super.onScrolled(recyclerView, dx, dy);                int lastPos = manager.findLastVisibleItemPosition();                if (lastPos + 1 == adapter.getItemCount()) {                    if (swipeRefreshLayout.isRefreshing()) {                        return;                    }                    if (!isLoading) {                        isLoading = true;                        loadData(url, page);                    }                }            }        });    }}

public class FoodAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {    private Context context;    private List<ParseFoodData.Food> datas;    private final int TYPE_COMMON = 0;    private final int TYPE_FOOTER = 1;    public FoodAdapter(Context context, List<ParseFoodData.Food> datas) {        this.context = context;        this.datas = datas;    }    /**     * 获得指定的位置上的显示类型     * */    @Override    public int getItemViewType(int position) {        if (position == getItemCount() - 1) {            return TYPE_FOOTER;        }        return TYPE_COMMON;    }    //创建viewholder的方法，可以通过判断viewType，创建不同位置的不同布局    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        if (viewType == TYPE_COMMON) {            View itemview = LayoutInflater.from(context).inflate(R.layout.item_list, parent, false);            ItemViewHolder itemViewHolder = new ItemViewHolder(itemview);            return itemViewHolder;        } else {            View footView = LayoutInflater.from(context).inflate(R.layout.item_footer, parent, false);            FooterViewHolder holder = new FooterViewHolder(footView);            return holder;        }    }    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {         if (holder instanceof ItemViewHolder){             ((ItemViewHolder)holder).tv_name.setText(datas.get(position).getTitle());             ((ItemViewHolder)holder).tv_summary.setText("材料："+datas.get(position).getFood_str());             ViewGroup.LayoutParams lp = ((ItemViewHolder) holder).icon.getLayoutParams();             lp.height =200;             lp.width=300;             ((ItemViewHolder) holder).icon.setLayoutParams(lp);             ImageOptions options = new ImageOptions.Builder().setLoadingDrawableId(R.mipmap.ic_launcher)                     .setFailureDrawableId(R.mipmap.ic_launcher).build();             x.image().bind(((ItemViewHolder) holder).icon,datas.get(position).getPic(),options);         }    }    //获取数据的数量    @Override    public int getItemCount() {        return datas.size() == 0 ? 0 : datas.size() + 1;    }    class ItemViewHolder extends RecyclerView.ViewHolder {        TextView tv_name, tv_summary;        ImageView icon;        public ItemViewHolder(View itemView) {            super(itemView);            tv_name = (TextView) itemView.findViewById(R.id.tv_name);            tv_summary = (TextView) itemView.findViewById(R.id.tv_summary);            icon = (ImageView) itemView.findViewById(R.id.icon);        }    }    class FooterViewHolder extends RecyclerView.ViewHolder {        public FooterViewHolder(View itemView) {            super(itemView);        }    }}

导入的包有 如下 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.jht.administrator.day05.RecycleerActivity04">    <android.support.v4.widget.SwipeRefreshLayout        android:id="@+id/sr1"        android:layout_width="match_parent"        android:layout_height="match_parent">        <android.support.v7.widget.RecyclerView            android:id="@+id/id_rv"            android:layout_width="match_parent"            android:layout_height="match_parent">        </android.support.v7.widget.RecyclerView>    </android.support.v4.widget.SwipeRefreshLayout></RelativeLayout>