RecycleView的上拉加载、下拉刷新、EmptyView、setOnItemClickListener的封装

平常使用上拉加载，每次都要写个多重布局来显示”正在加载”与”无更多数据”以及EmptyView。
费时费力，就写了封装类来解决，具体就不多说了，主要代码都加了注释。。。Demo在文章末尾。

BaseRecycleViewAdapter.java

package com.lee.huohuo.configadapter;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.LinearLayout;import android.widget.TextView;import com.lee.huohuo.R;import java.util.List;/** * @author Lee * @function 实现RecycleView.Adapter方法 * @date ：16/12/12 * @mail [e-mail] */public abstract class BaseRecycleViewAdapter<T, M extends ItemRecycleViewHolder> extends RecyclerView.Adapter {    private final int INDEX_CONTENT = 0;    private final int INDEX_FOOTER = 1;    private final int INDEX_EMPTY = 2;    private boolean isShowFooter = true;    private boolean isShowEmpty = false;    public boolean isShowFooter() {        return isShowFooter;    }    public void setShowFooter(boolean showFooter) {        isShowFooter = showFooter;    }    public boolean isShowEmpty() {        return isShowEmpty;    }    public void setShowEmpty(boolean showEmpty) {        isShowEmpty = showEmpty;    }    private List<T> mList;    private Context mContext;    public BaseRecycleViewAdapter(List<T> lists, Context context) {        mList = lists;        mContext = context;    }    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup group, int position) {        View view = null;        RecyclerView.ViewHolder viewHolder = null;        switch (position) {            case INDEX_CONTENT:                //子Adapter抽象来的LayoutID值                view = LayoutInflater.from(mContext).inflate(getItemLayoutId(), group, false);                //子Adapter抽象来的ViewHolder对象                viewHolder = getItemViewHolder(view);                break;            case INDEX_FOOTER:                //如果其子类传了布局ID,那么使用它,否则使用默认布局                view = LayoutInflater.from(mContext).inflate(R.layout.layout_view_footer, group, false);                viewHolder = new _FooterViewHolder(view);                break;            case INDEX_EMPTY:                //使用默认的"数据为空"布局                view = LayoutInflater.from(mContext).inflate(R.layout.layout_view_empty, group, false);                viewHolder = new _EMPTYViewHolder(view);                break;        }        return viewHolder;    }    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {        switch (getItemViewType(position)) {            case INDEX_CONTENT:                ItemRecycleViewHolder itemRecycleViewHolder = (ItemRecycleViewHolder) holder;                //将List内的数据以Bean的方式取出                itemRecycleViewHolder.bindHolder(mList.get(position));                itemRecycleViewHolder.getItemRecycleView().setOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View v) {                        if (mOnItemClickListener != null) {                            mOnItemClickListener.OnItemClick(position);                        }                    }                });                break;            case INDEX_FOOTER:                _FooterViewHolder footerViewHolder = (_FooterViewHolder) holder;                if (isShowFooter()) {                    footerViewHolder.viewFooterDoingUpData_LinearLayout.setVisibility(View.VISIBLE);                    footerViewHolder.viewFooterNotMoreData_TextView.setVisibility(View.GONE);                    if(mOnGetDataListener!=null){                        mOnGetDataListener.onGetData();                    }                } else {                    footerViewHolder.viewFooterDoingUpData_LinearLayout.setVisibility(View.GONE);                    footerViewHolder.viewFooterNotMoreData_TextView.setVisibility(View.VISIBLE);                }                break;            case INDEX_EMPTY:                _EMPTYViewHolder emptyViewHolder = (_EMPTYViewHolder) holder;                if (isShowEmpty()) {                    emptyViewHolder.view.setVisibility(View.VISIBLE);                } else {                    emptyViewHolder.view.setVisibility(View.GONE);                }                break;        }    }    private class _FooterViewHolder extends RecyclerView.ViewHolder {        View view;        LinearLayout viewFooterDoingUpData_LinearLayout;        TextView viewFooterNotMoreData_TextView;        public _FooterViewHolder(View itemView) {            super(itemView);            view = itemView.findViewById(R.id.load_layout);            viewFooterDoingUpData_LinearLayout = (LinearLayout) itemView.findViewById(R.id.viewFooterDoingUpData_LinearLayout);            viewFooterNotMoreData_TextView = (TextView) itemView.findViewById(R.id.viewFooterNotMoreData_TextView);        }    }    private class _EMPTYViewHolder extends RecyclerView.ViewHolder {        View view;        public _EMPTYViewHolder(View itemView) {            super(itemView);            view = itemView.findViewById(R.id.viewEmpty_LinearLayout);        }    }    @Override    public int getItemCount() {        //FooterView和EmptyView只会显示一个，这里进行+1操作        return mList.size() + 1;    }    @Override    public int getItemViewType(int position) {        //当ListSize为0时显示“空”布局        if (mList.size() == 0) {            return INDEX_EMPTY;        }        //当当前position为当前ListSize的最大值时，显示“正在加载”布局        if (mList.size() == position) {            return INDEX_FOOTER;        }        //其它则返回子Adapter布局        return INDEX_CONTENT;    }    public interface OnItemClickListener {        void OnItemClick(int position);    }    private OnItemClickListener mOnItemClickListener;    public void setOnItemClickListener(OnItemClickListener mOnItemClickListener) {        this.mOnItemClickListener = mOnItemClickListener;    }    public interface OnGetDataListener {        void onGetData();    }    private OnGetDataListener mOnGetDataListener;    public void setOnGetDataListener(OnGetDataListener mOnGetDataListener) {        this.mOnGetDataListener = mOnGetDataListener;    }    //抽象方法，得到子Adapter的布局Resource    protected abstract int getItemLayoutId();    //抽象方法，得到子Adapter的ViewHolder对象    protected abstract M getItemViewHolder(View view);}

因为ItemRecycleViewHolder这个是与子Adapter共用一个对象，所以额外写一个类
ItemRecycleViewHolder.java

package com.lee.huohuo.configadapter;import android.support.v7.widget.RecyclerView;import android.view.View;/** * @author Lee * @function 跟BaseRecycleadapter公用 * @date ：16/12/12 * @mail [e-mail] */public abstract class ItemRecycleViewHolder<T> extends RecyclerView.ViewHolder {    private View mView;    public ItemRecycleViewHolder(View v) {        super(v);        mView = v;    }    public View getItemRecycleView() {        return mView;    }    abstract public void bindHolder(T t);}

MainActivityAdapter.java

package com.lee.huohuo.adapter;import android.content.Context;import android.view.View;import android.widget.TextView;import com.lee.huohuo.R;import com.lee.huohuo.configadapter.BaseRecycleViewAdapter;import com.lee.huohuo.configadapter.ItemRecycleViewHolder;import com.lee.huohuo.model.MainActivityBean;import java.util.List;/** * Created by lee * Date 16-12-13. */public class MainActivityAdapter extends BaseRecycleViewAdapter {    //这里为了规范，但没有使用下面两个对象    private List<MainActivityBean> mList;    private Context mContext;    public MainActivityAdapter(List<MainActivityBean> lists, Context context) {        super(lists, context);        mList = lists;        mContext = context;    }    private class MainActivityViewHolder extends ItemRecycleViewHolder<MainActivityBean> {        TextView itemMainActivityUserName_TextView, itemMainActivityPassWord_TextView;        public MainActivityViewHolder(View v) {            super(v);            itemMainActivityUserName_TextView = (TextView) v.findViewById(R.id.itemMainActivityUserName_TextView);            itemMainActivityPassWord_TextView = (TextView) v.findViewById(R.id.itemMainActivityPassWord_TextView);        }        @Override        public void bindHolder(MainActivityBean bean) {            itemMainActivityUserName_TextView.setText(bean.getUsername());            itemMainActivityPassWord_TextView.setText(bean.getPassword());        }    }    @Override    protected int getItemLayoutId() {        //返回给基类布局Resource        return R.layout.item_mainactivity;    }    @Override    protected ItemRecycleViewHolder getItemViewHolder(View view) {        //返回给基类当前Adapter的ViewHolder对象        return new MainActivityViewHolder(view);    }}

封装的RecycleViewAdapter是把接口开放出来由我们自己去决定是否要进行加载更多以及空Item操作，这里讲解了具体的使用方法
MainActivity.java

package com.lee.huohuo;import android.support.v4.widget.SwipeRefreshLayout;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.widget.LinearLayout;import android.widget.Toast;import com.alibaba.fastjson.JSON;import com.lee.huohuo.adapter.MainActivityAdapter;import com.lee.huohuo.configadapter.BaseRecycleViewAdapter;import com.lee.huohuo.model.MainActivityBean;import org.xutils.common.Callback;import org.xutils.common.util.LogUtil;import org.xutils.http.RequestParams;import org.xutils.view.annotation.ViewInject;import org.xutils.x;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener {    private String TAG = "MainActivity";    @ViewInject(R.id.mainActivity_RecyclerView)    private RecyclerView mainActivity_RecyclerView;    private LinearLayoutManager layoutManager;    @ViewInject(R.id.mainActivity_SwipeRefreshLayout)    private SwipeRefreshLayout mainActivity_SwipeRefreshLayout;    private MainActivityAdapter mainActivity_Adapter;    private List<MainActivityBean> mainActivityBean_list;    private final int REFRESH_DATATYPE = 0;    private final int UPDATE_DATATYPE = 1;    private int LOAD_PAGE = 0;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //XUtils的注解初始化，为了方便而已        x.view().inject(this);        initValue();        initListener();        //初始化RecycleView数据        getData(REFRESH_DATATYPE);    }    private void initValue() {        mainActivityBean_list = new ArrayList<>();        mainActivity_Adapter = new MainActivityAdapter(mainActivityBean_list, MainActivity.this);        layoutManager = new LinearLayoutManager(MainActivity.this);        //LinearLayoutManager的基本配置，没什么好说的        layoutManager.setOrientation(LinearLayout.VERTICAL);        mainActivity_RecyclerView.setLayoutManager(layoutManager);        mainActivity_RecyclerView.setAdapter(mainActivity_Adapter);    }    private void initListener() {        //SwipeRefreshLayout的监听        mainActivity_SwipeRefreshLayout.setOnRefreshListener(this);        mainActivity_Adapter.setOnItemClickListener(new BaseRecycleViewAdapter.OnItemClickListener() {            @Override            public void OnItemClick(int position) {                Toast.makeText(MainActivity.this, "" + position, Toast.LENGTH_SHORT).show();            }        });        //FooterView默认是显示的,当Adapter的bind开始绘制FooterView时，会回调此接口        mainActivity_Adapter.setOnGetDataListener(new BaseRecycleViewAdapter.OnGetDataListener() {            @Override            public void onGetData() {                getData(UPDATE_DATATYPE);            }        });        //这里有一个不算Bug的Bug，当下拉刷新调用转圈的动画时，立即上滑，会直接崩溃，所以判断当动画正在进行时，让RecycleView不可滑动        mainActivity_RecyclerView.setOnTouchListener(new View.OnTouchListener() {            @Override            public boolean onTouch(View v, MotionEvent event) {                if(mainActivity_SwipeRefreshLayout.isRefreshing()){                    return true;                }                return false;            }        });    }    private void getData(int type) {        if (type == REFRESH_DATATYPE) {            mainActivityBean_list.clear();        }        RequestParams params = new RequestParams("http://cn.bing.com/");        x.http().post(params, new Callback.CacheCallback<String>() {            @Override            public void onSuccess(String result) {                Log.e(TAG, "MainActivity======onSuccess========" + result);                //请求的bing官网，这里为了方便测试使用本地JSON替换掉网络数据                String localResult = "[{\"username\":\"Tom\",\"password\":\"Tom123456\"},{\"username\":\"Jack\",\"password\":\"Jack123456\"},{\"username\":\"Zach\",\"password\":\"Zach123456\"},{\"username\":\"Jack\",\"password\":\"Jack123456\"},{\"username\":\"Zach\",\"password\":\"Zach123456\"},{\"username\":\"Jack\",\"password\":\"Jack123456\"},{\"username\":\"Zach\",\"password\":\"Zach123456\"},{\"username\":\"Jack\",\"password\":\"Jack123456\"},{\"username\":\"Zach\",\"password\":\"Zach123456\"}]";                List<MainActivityBean> temp_list = JSON.parseArray(localResult, MainActivityBean.class);                mainActivityBean_list.addAll(temp_list);                //记录加载次数                LOAD_PAGE++;                //加载3次之后显示无更多数据,正常的网络数据一般用temp_list.size()==0来判断                if (LOAD_PAGE == 3) {                    mainActivity_Adapter.setShowFooter(false);                } else {                    mainActivity_Adapter.setShowFooter(true);                }                //因为是本地JSON这里的mainActivityBean_list.size()不会为0，使用的LOAD_PAGE来进行操作                if (mainActivityBean_list.size() == 0) {                    mainActivity_Adapter.setShowEmpty(true);                } else {                    mainActivity_Adapter.setShowEmpty(false);                }                mainActivity_Adapter.notifyDataSetChanged();            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {                Log.e(TAG, "MainActivity======onError========" + ex.getMessage());            }            @Override            public void onCancelled(CancelledException cex) {                Log.e(TAG, "MainActivity======onCancelled========" + cex.getMessage());            }            @Override            public void onFinished() {                mainActivity_SwipeRefreshLayout.setRefreshing(false);                Log.e(TAG, "MainActivity======onFinished========");            }            @Override            public boolean onCache(String result) {                Log.e(TAG, "MainActivity======onCache========" + result);                return false;            }        });    }    @Override    public void onRefresh() {        //LOAD_PAGE重置        LOAD_PAGE = 0;        //在这里进行刷新操作        getData(REFRESH_DATATYPE);    }}

代码就到这里吧，主要写的是思路，XML布局在项目里面，有需要的可以看看
下载链接：http://download.csdn.net/detail/wx_anonymity/9746461