打造通用的Adapter为RecyclerView服务

1，创建一个点击事件的接口

public interface OnItemClickListener {
    void onItemClick(int position);
}

2，创建一个长按事件的接口:

public interface OnItemLongClickListener {
    boolean onItemLongClick(int position);
}

3，创建一个共通的ViewHolder：

public class ComViewHolder extends RecyclerView.ViewHolder {
    //用来存放itemview中的子view，减少findById次数
    private SparseArray<View> mViews;
    public ComViewHolder(View itemView) {
        super(itemView);
        mViews = new SparseArray<>();
    }

    // 通过viewId获取view
    public <T extends View> T getView(int viewId) {
        // 先从缓存中找
        View view = mViews.get(viewId);
        if (view == null) {
            view = itemView.findViewById(viewId);
            mViews.put(viewId, view);
        }
        return (T) view;
    }

    // 设置TextView文本
    public ComViewHolder setText(int viewId, CharSequence text) {
        TextView tv = getView(viewId);
        tv.setText(text);
        return this;
    }

    // 设置ImageView的资源
    public ComViewHolder setImageResource(int viewId, int res) {
        ImageView iv = getView(viewId);
        iv.setImageResource(res);
        return this;
    }

    // 设置view的Visibility
    public ComViewHolder setViewVisibility(int viewId, int visibility) {
        getView(viewId).setVisibility(visibility);
        return this;
    }

    // item点击事件
    public void setOnItemClickListener(View.OnClickListener listener) {
        itemView.setOnClickListener(listener);
    }

    // item长按事件
    public void setOnItemLongClick(View.OnLongClickListener listener) {
        itemView.setOnLongClickListener(listener);
    }

    // 通过路径设置显示图片
    public ComViewHolder setImageByUrl(int viewId, HolderImageLoader imageLoader) {
        ImageView imageView = getView(viewId);
        if (imageView == null) {
            throw new NullPointerException("imageLoader is null !!");
        }
        imageLoader.displayImage(imageView.getContext(), imageView, imageLoader.getImagePath());
        return this;
    }

    /**
     * 图片加载
     */
    public static abstract class HolderImageLoader {
        private String mImagePath;

        public HolderImageLoader(String path){
            mImagePath = path;
        }

        public String getImagePath() {
            return mImagePath;
        }

        public abstract void displayImage(Context context, ImageView iamgeView, String imagePath);
    }
}

4，共通的RecyclerView.Adapter：

public abstract class CommonRecyclerAdapter<T extends BaseResponseBean> extends RecyclerView.Adapter<ComViewHolder>{

    private List<T> mList;
    public Context mContext;
    private LayoutInflater mInflater;
    private int mLayoutRes;
    private MultiTypeSupport mMultiTypeSupport;
    private OnItemClickListener mOnItemClickListener;
    private OnItemLongClickListener mOnItemLongClickListener;

    // 普通的构造
    public CommonRecyclerAdapter(List<T> list, Context context, int res) {
        mContext = context;
        mList = list;
        mLayoutRes = res;
        mInflater = LayoutInflater.from(context);
    }

    // 多布局的构造
    public CommonRecyclerAdapter(List<T> list, Context context, MultiTypeSupport<T> multiTypeSupport) {
        this(list, context, -1);
        this.mMultiTypeSupport = multiTypeSupport;
    }

    @Override
    public int getItemViewType(int position) {
        if (mMultiTypeSupport != null) {
            return mMultiTypeSupport.getResId(mList.get(position), position);
        }
        return super.getItemViewType(position);
    }

    @Override
    public ComViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (mMultiTypeSupport != null) {
            mLayoutRes = viewType;
        }
        View itemView = mInflater.inflate(mLayoutRes, parent, false);
        ComViewHolder viewHolder = new ComViewHolder(itemView);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ComViewHolder holder, final int position) {
        if (mOnItemClickListener != null) {
            holder.setOnItemClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    mOnItemClickListener.onItemClick(position);
                }
            });

        }
        if (mOnItemLongClickListener != null) {
            holder.setOnItemLongClick(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View view) {
                    return mOnItemLongClickListener.onItemLongClick(position);
                }
            });

        }
        convert(holder, mList.get(position), position);
    }

    @Override
    public int getItemCount() {
        return mList.size();
    }

    public abstract void convert(ComViewHolder holder, T item, int position);

    public void setOnItemClickListener(OnItemClickListener listener) {
        mOnItemClickListener = listener;
    }

    public void setOnItemLongClickListener(OnItemLongClickListener listener) {
        mOnItemLongClickListener = listener;
    }
}

5，实践，业务的adapter调用

public class PoiSendHisAdapter extends CommonRecyclerAdapter<PoiSendHistoryBean>{
    public PoiSendHisAdapter(List<PoiSendHistoryBean> list, Context context, int res) {
        super(list, context, res);
    }
    public PoiSendHisAdapter(List<PoiSendHistoryBean> list, Context context, MultiTypeSupport<PoiSendHistoryBean> multiTypeSupport) {
        super(list, context, multiTypeSupport);
    }

    @Override
    public void convert(ComViewHolder holder, PoiSendHistoryBean item, int position) {

        if (position == 0) {
            holder.setText(R.id.poi_name_tx, item.getPoiName())
                    .setText(R.id.poi_add_tx, item.getPoiAddr());
        } else {
            SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日 HH:mm");
            String strTime = format.format(new Date(item.getSendTime()));
            holder.setText(R.id.send_history_poi_name_tx, item.getPoiName())
                    .setText(R.id.send_history_poi_add_tx, item.getPoiAddr())
                    .setText(R.id.send_history_time_tx, strTime);

            TextView status = ((TextView) holder.itemView.findViewById(R.id.send_history_status));
            status.setTextColor(mContext.getResources().getColor(R.color.common_text_color));
            String strStatus = "";
            if ("1".equals(item.getSendStatus())) {
                strStatus = mContext.getResources().getString(R.string.send_history_ing);
            } else if ("2".equals(item.getSendStatus())) {
                strStatus = mContext.getResources().getString(R.string.send_history_success);
            } else {
                strStatus = mContext.getResources().getString(R.string.send_history_fail);
                status.setTextColor(mContext.getResources().getColor(R.color.red));
            }
            status.setText(strStatus);
        }
    }

}

6，activity中：

// 构造多布局的adapter 		

PoiSendHisAdapter adapter = new PoiSendHisAdapter(mDataList, PositionPoiSendHistoryActivity.this, new MultiTypeSupport<PoiSendHistoryBean>() {
                    @Override
                    public int getResId(PoiSendHistoryBean item, int poisition) {
                        if (poisition == 0) {
                            return R.layout.item_poi_result;
                        } else {
                            return R.layout.item_poi_send_history;
                        }
                    }
                });

                LinearLayoutManager layoutManager = new LinearLayoutManager(this);
                layoutManager.setOrientation(OrientationHelper.VERTICAL);

                // 设置显示分割 ListView样式
                mListView.setLayoutManager(new LinearLayoutManager(this));
                mListView.setAdapter(adapter);
                adapter.setOnItemClickListener(new OnItemClickListener() {
                    @Override
                    public void onItemClick(int position) {
                        TopToast.show(this, "item点击事件响应位置："+position);
                    }
                });
                adapter.setOnItemLongClickListener(new OnItemLongClickListener() {
                    @Override
                    public boolean onItemLongClick(int position) {
                        TopToast.show(this, "item长按点击事件响应位置："+position);
                        return true;
                    }
                });
            }