RecyclerView使用（二）多种Item布局、添加点击事件

一、RecyclerView的多种Item布局
getItemViewType()方法同ListView中的一样，在Item有多种布局时使用。在onCreateViewHolder(ViewGroup parent, int viewType) 中的第二个参数就是Item的类型，在onBindViewHolder(final ListViewAdapter.ListViewHolder holder, int position)中可以通过 holder instanceof XXXHolder来进行判断类型，来进行相应的操作.

public class MultipleItemAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {    public static enum ITEM_TYPE {        ITEM_TYPE_IMAGE,        ITEM_TYPE_TEXT    }    private final LayoutInflater mLayoutInflater;    private final Context mContext;    private String[] mTitles;    public MultipleItemAdapter(Context context) {        mTitles = context.getResources().getStringArray(R.array.titles);        mContext = context;        mLayoutInflater = LayoutInflater.from(context);    }    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        if (viewType == ITEM_TYPE.ITEM_TYPE_IMAGE.ordinal()) {            return new ImageViewHolder(mLayoutInflater.inflate(R.layout.item_image, parent, false));        } else {            return new TextViewHolder(mLayoutInflater.inflate(R.layout.item_text, parent, false));        }    }    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {        if (holder instanceof TextViewHolder) {            ((TextViewHolder) holder).mTextView.setText(mTitles[position]);        } else if (holder instanceof ImageViewHolder) {            ((ImageViewHolder) holder).mTextView.setText(mTitles[position]);        }    }    @Override    public int getItemViewType(int position) {        return position % 2 == 0 ? ITEM_TYPE.ITEM_TYPE_IMAGE.ordinal() : ITEM_TYPE.ITEM_TYPE_TEXT.ordinal();    }    @Override    public int getItemCount() {        return mTitles == null ? 0 : mTitles.length;    }    public static class TextViewHolder extends RecyclerView.ViewHolder {        @InjectView(R.id.text_view)        TextView mTextView;        TextViewHolder(View view) {            super(view);            ButterKnife.inject(this, view);            view.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    Log.d("TextViewHolder", "onClick--> position = " + getPosition());                }            });        }    }    public static class ImageViewHolder extends RecyclerView.ViewHolder {        @InjectView(R.id.text_view)        TextView mTextView;        @InjectView(R.id.image_view)        ImageView mImageView;        ImageViewHolder(View view) {            super(view);            ButterKnife.inject(this, view);            view.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    Log.d("ImageViewHolder", "onClick--> position = " + getPosition());                }            });        }    }}

二、点击事件

1）自定义点击事件接口

 public interface OnClickItemListener {        void onClickItem(View view, String tag);    }

2）在适配器Adapter中设置方法

private OnClickItemListener listener;public void setOnClickItemListener(OnClickItemListener listener) {            this.listener = listener;        }

3）在onBindViewHolder(…)中为相应的控件添加点击方法，方法中调用自定义的点击事件

 holder.itemView.setOnClickListener(new View.OnClickListener() {         @Override         public void onClick(View view) {              listener.onClickItem(view, (String) view.getTag());                    }                });

当点击item时就会出发点击事件，就会调用自定义的onClickItem方法。

4）为adapter注册监听，通过adapter向外暴露的方法

 adapter.setOnClickItemListener(new OnClickItemListener() {            @Override            public void onClickItem(View view, String tag) {                //点击后想要做的事                ｝        });

注意
使用RecyclerView时要在builder中添加依赖。直接添加这个就可以了。

compile ‘com.android.support:design:23.2.1’