简单的实现Recyclerview选中效果，开发中很常见，比如点击item，后面加上选择按钮，亦或者类似CheckBox效果，可以用很少几行代码实现
直接贴代码，布局很简单，一个文字，后面一个选择按钮
"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="45dp" android:layout_margin="5dp" android:gravity="center" android:orientation="horizontal"> <TextView android:id="@+id/tv_state" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="center" android:layout_marginLeft="5dp" android:layout_marginRight="10dp" android:gravity="center" android:textColor="@color/state_visibility" android:textSize="18sp" tools:text="@string/state" /> <ImageView android:id="@+id/iv_selected" android:layout_width="wrap_content" android:layout_height="match_parent" android:visibility="invisible" android:src="@drawable/icon_selected" /> </LinearLayout>实现选择功能，在Adapter中
/** * Author : ddz * Creation time : 2017/3/1 17:08 * Fix time : 2017/3/1 17:08 */ public class CheckStateAdapter extends RecyclerView.Adapter<CheckStateAdapter.StateHolder> { private Context context; private String[] arrayState; private int selectedPosition = -5; //默认一个参数 public CheckStateAdapter(@NonNull String[] arrayState, Context context) { this.context = context; this.arrayState = arrayState; } @Override public StateHolder onCreateViewHolder(ViewGroup parent, int viewType) { return new StateHolder(LayoutInflater.from(context).inflate(R.layout.state_item, parent, false)); } @Override public void onBindViewHolder(StateHolder holder, int position) { if (null == arrayState) return; holder.itemView.setSelected(selectedPosition == position); if (selectedPosition == position) { holder.ivSelected.setVisibility(View.VISIBLE); } else { holder.ivSelected.setVisibility(View.INVISIBLE); } holder.tvState.setText(arrayState[position]); holder.itemView.setOnClickListener(view -> { onItemClickListener.OnItemClick(view, holder, holder.getAdapterPosition()); selectedPosition = position; //选择的position赋值给参数， notifyItemChanged(selectedPosition);//刷新当前点击item }); } @Override public int getItemCount() { return arrayState.length == 0 ? 0 : arrayState.length; } public void updateData(String[] airPortModels) { if (null != arrayState) { selectedPosition = -5; arrayState = null; arrayState = airPortModels; notifyDataSetChanged(); } } public class StateHolder extends RecyclerView.ViewHolder { @BindView(R.id.tv_state) TextView tvState; @BindView(R.id.iv_selected) ImageView ivSelected; public StateHolder(View itemView) { super(itemView); ButterKnife.bind(this, itemView); } } private OnItemClickListener onItemClickListener; public interface OnItemClickListener { //定义接口，实现Recyclerview点击事件 void OnItemClick(View view, StateHolder holder, int position); } public void setOnItemClickListener(OnItemClickListener onItemClickListener) { //实现点击 this.onItemClickListener = onItemClickListener; } }item点击时，就可以简单实现点击选中效果
