RecyclerView手指按下时，item背景变色

需求：recyclerview显示的时候，手指按下，item的背景发生变化

步骤1、设置item的布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="match_parent"    android:layout_height="180dp"    android:gravity="center_vertical"    android:background="@drawable/bg_selector"    android:focusable="true"    >    <de.hdodenhof.circleimageview.CircleImageView/>    <LinearLayout />LinearLayout>

步骤2、background背景选择

android:background="@drawable/bg_selector"

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="true" android:drawable="@drawable/pressed"/>    <item android:drawable="@drawable/normal"/>selector>

步骤3、item的“事件”处理代码阅读 onBindViewHolder

public class MyRecycleViewAdapter extends RecyclerView.Adapter {    private ListmList;    private Context context;    public MyRecycleViewAdapter(List mList,Context context) {        this.mList = mList;        this.context = context;    }    public interface OnItemClickListener{        void onItemClick(View view,int postion);        void onItemLongClick(View view,int postion);    }    private OnItemClickListener mOnItemClickListener;    public void setmOnItemClickListener(OnItemClickListener mOnItemClickListener) {        this.mOnItemClickListener = mOnItemClickListener;    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = LayoutInflater.from(context).inflate(R.layout.item_home, parent,false);        MyViewHolder holder = new MyViewHolder(view);        return holder;    }    @Override    public void onBindViewHolder(final MyViewHolder holder, int position) {        holder.title.setText(mList.get(position).getTitles());        int r = new Random().nextInt(100);        r = r % 31;        if(r == 0) r=1;        String uri = "http://***/resources/default_image_"+ r +".jpg";        Picasso.with(context).load(uri).resize(550, 550).centerInside().into(holder.imageView);        if(mOnItemClickListener!=null){            holder.itemView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View view) {                    int pos = holder.getLayoutPosition();                    mOnItemClickListener.onItemClick(holder.itemView,pos);                }            });            holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {                @Override                public boolean onLongClick(View view) {                    int pos = holder.getLayoutPosition();                    mOnItemClickListener.onItemLongClick(holder.itemView,pos);                    return false;                }            });        }    }    @Override    public int getItemCount() {        return mList.size();    }    class MyViewHolder extends RecyclerView.ViewHolder{        CircleImageView imageView;        TextView title;        public MyViewHolder(View itemView) {            super(itemView);            imageView = (CircleImageView) itemView.findViewById(R.id.icon);            title = (TextView) itemView.findViewById(R.id.title);        }    }}

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