仿新闻类实现滑动选择标签（二）

通过RecyclerView结合ItemTouchHelper实现拖动改变位置功能。

标签页面主要逻辑，第一个项目不变，前一界面选择所在的标签位置，跳转到本界面，用红色文字表示，推荐栏目中，显示定制栏目不存在的栏目，删除定制栏目，添加到推荐栏目中，点击推荐栏目，将点击项加入定制栏目中，并且在推荐栏目中删除，拖动改变顺序或者添加删除后，回到前一界面，更改前一界面的标签和界面，并且定位在选中标签对应的页面。长按显示叉号

相关类：主界面
ColumnCustomizationActivity.java

public class ColumnCustomizationActivity extends BaseCompatActivity implements MyItemTouchCallback.OnDragListener
{

    @BindView(R.id.toolbar_title)
    TextView toolbarTitle;
    @BindView(R.id.recyclerview_already)
    RecyclerView recyclerviewAlready;
    @BindView(R.id.recyclerview_recommend)
    RecyclerView recyclerviewRecommend;
    @BindView(R.id.back)
    ImageView ivBack;
    @BindView(R.id.tv_edit)
    TextView tvEdit;

    private List<ArticleBean> articleBeanList = new ArrayList<>();
    private List<ArticleBean> articleBeanList2 = new ArrayList<>();

    private RecyclerAdapter adapterAlready;
    private RecyclerAdapter adapterAll;

    private int selectPosition = 0;//与前一页对应，选中的标签

    public static String SELECT_COLUMN = "SELECT_COLUMN";
    public static String SELECT_COLUMN_INDEX = "SELECT_COLUMN_INDEX";
    private static String SELECT_PARAM = "select_column";
    private static String SELECT_PARAM_LIST = "select_column_list";
    public static void startForResult(Activity context, int selectPosition,ArrayList<ArticleBean> articleBeanArrayList, int requestCode)
    {
        Intent intent = new Intent();
        intent.setClass(context, ColumnCustomizationActivity.class);
        intent.putExtra(SELECT_PARAM, selectPosition);
        intent.putExtra(SELECT_PARAM_LIST, articleBeanArrayList);
        intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        context.startActivityForResult(intent, requestCode);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_column_customization);
        ButterKnife.bind(this);
        ivBack.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                finish();
            }
        });

        Intent intent = getIntent();
        if (intent != null)
        {
            selectPosition = intent.getIntExtra(SELECT_PARAM, 0);
            articleBeanList= (List<ArticleBean>) intent.getSerializableExtra(SELECT_PARAM_LIST);
        }
        if(articleBeanList==null){
            articleBeanList=new ArrayList<>();
        }

        setUpRecyclerviewAlready();
        setUpRecyclerviewRecommend();

        //调用推荐栏目接口
        getListArticleMainClass();


        tvEdit.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                if (adapterAlready != null)
                {
                    UpdateCustom();
                }
            }
        });
    }

    /**
     * 设置已选栏目
     */
    private void setUpRecyclerviewAlready()
    {
        adapterAlready = new RecyclerAdapter(R.layout.drag_item_layout, articleBeanList, false, ColumnCustomizationActivity.this, selectPosition);
        recyclerviewAlready.setHasFixedSize(true);
        recyclerviewAlready.setAdapter(adapterAlready);
        recyclerviewAlready.setNestedScrollingEnabled(false);
        //防止滑动卡顿
        GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 3)
        {
            @Override
            public boolean canScrollVertically()
            {
                return false;
            }
        };
        recyclerviewAlready.setLayoutManager(gridLayoutManager);
        int spanCount = 3;//跟布局里面的spanCount属性是一致的
        int spacing = 10;//每一个矩形的间距
        boolean includeEdge = true;//如果设置成false那边缘地带就没有间距
        //设置每个item间距
        recyclerviewAlready.addItemDecoration(new GridSpacingItemDecoration(spanCount, spacing, includeEdge));
        final ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new MyItemTouchCallback(adapterAlready).setOnDragListener(this));
        itemTouchHelper.attachToRecyclerView(recyclerviewAlready);

        recyclerviewAlready.addOnItemTouchListener(new OnRecyclerItemClickListener(recyclerviewAlready)
        {
            @Override
            public void onLongClick(RecyclerView.ViewHolder vh)
            {
                tvEdit.setVisibility(View.VISIBLE);
                adapterAlready.doStartEditMode(recyclerviewAlready);
                adapterAlready.setShowImage(true);
                  if(vh.getAdapterPosition()==0){//第一项不操作
                      return;
                  }
                  itemTouchHelper.startDrag(vh);
            }

            @Override
            public void onItemClick(final RecyclerView.ViewHolder vh)
            {
                adapterAlready.setmAdapterInterface(new RecyclerAdapter.adapterInterface()
                {
                    @Override
                    public void imageViewClick()
                    {

                        try
                        {
                            articleBeanList2.add(articleBeanList.get(vh.getLayoutPosition()));
                            adapterAll.notifyDataSetChanged();
                            //点击删除按钮，如果选中的索引比剩余数据的长度大，将选中索引设置为最后一项
                            if (selectPosition == articleBeanList.size() - 1)
                            {
                                selectPosition--;
                                if (selectPosition <= 0)
                                {
                                    selectPosition = 0;
                                }
                            }
                            articleBeanList.remove(vh.getLayoutPosition());
                            adapterAlready.setSelectPosition(selectPosition);
                            adapterAlready.notifyDataSetChanged();
                        }catch (Exception e){
                            e.printStackTrace();
                        }
                    }

                    @Override
                    public void itemViewClick()
                    {
                        try
                        {
                            selectPosition = vh.getLayoutPosition();//设置选中的项目
                            adapterAlready.setSelectPosition(selectPosition);
                            adapterAlready.notifyDataSetChanged();
                        }catch (Exception e){
                            e.printStackTrace();
                        }
                    }
                });

                // Toast.makeText(getActivity(),item.getId()+" "+item.getName(),Toast.LENGTH_SHORT).show();
            }
        });
    }

    /**
     * 设置推荐栏目
     */
    private void setUpRecyclerviewRecommend()
    {
        adapterAll = new RecyclerAdapter(R.layout.drag_item_layout, articleBeanList2, false, ColumnCustomizationActivity.this, -1);
        recyclerviewRecommend.setHasFixedSize(true);
        recyclerviewRecommend.setAdapter(adapterAll);
        recyclerviewRecommend.setNestedScrollingEnabled(false);
        //防止滑动卡顿
        GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 3)
        {
            @Override
            public boolean canScrollVertically()
            {
                return false;
            }
        };
        recyclerviewRecommend.setLayoutManager(gridLayoutManager);

        int spanCount = 3;//跟布局里面的spanCount属性是一致的
        int spacing = 10;//每一个矩形的间距
        boolean includeEdge = true;//如果设置成false那边缘地带就没有间距
        //设置每个item间距
        recyclerviewRecommend.addItemDecoration(new GridSpacingItemDecoration(spanCount, spacing, includeEdge));
        ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new MyItemTouchCallback(adapterAll).setOnDragListener(this));
        itemTouchHelper.attachToRecyclerView(recyclerviewRecommend);

        recyclerviewRecommend.addOnItemTouchListener(new OnRecyclerItemClickListener(recyclerviewAlready)
        {
            @Override
            public void onLongClick(RecyclerView.ViewHolder vh)
            {

            }

            @Override
            public void onItemClick(final RecyclerView.ViewHolder vh)
            {
                try
                {
                    //点击推荐栏目，加入到定制栏目组内,本栏目在推荐栏目组里删除，
                    articleBeanList.add(articleBeanList2.get(vh.getLayoutPosition()));
                    adapterAlready.notifyDataSetChanged();
                    articleBeanList2.remove(vh.getLayoutPosition());
                    adapterAll.notifyDataSetChanged();
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        });
    }

    @Override
    public void onFinishDrag()
    {

    }


    /**
     * 所有栏目
     */
    public void getListArticleMainClass()
    {

        String url = Contants.APIURL.GET_LISTARTICLEMAINCLASS.getUrl();

        RequestEntity<String> entity = new RequestEntity<>();

        OkHttpUtils.get().url(url).headers(entity.getHeader()).build().execute(new JsonCallBack<ResponseEntity<ArrayList<ArticleBean>>>()
        {
            @Override
            public void onError(Call call, Exception e, RequestCall requestCall)
            {
                ToastUtil.showLongToast("网络异常，请稍后尝试");
            }

            @Override
            public void onResponse(ResponseEntity<ArrayList<ArticleBean>> data, RequestCall requestCall)
            {
                if (data.isOK())
                {
                    articleBeanList2.clear();
                    //遍历数据，将已有的栏目筛选掉
                    for (ArticleBean bean : data.getRstData())
                    {
                        boolean isExist = false;//是否已存在栏目
                        for (ArticleBean bean1 : articleBeanList)
                        {
                            if (bean.getId().equals(bean1.getId()))
                            {
                                isExist = true;
                            }
                        }
                        if (!isExist)
                        {//不存在，添加
                            articleBeanList2.add(bean);
                        }
                    }
                    adapterAll.notifyDataSetChanged();
                }
                else
                {
                    ToastUtil.showLongToast(data.getErrorMsg());
                }
            }
        });
    }

    /**
     * 更新栏目
     */
    private void UpdateCustom()
    {
        showProgressDialog("请稍候", null, null);
        ArrayList<UpdateCustomBean> arrayList = new ArrayList<>();
        for (ArticleBean bean : articleBeanList)
        {
            UpdateCustomBean updateCustomBean = new UpdateCustomBean();
            updateCustomBean.setName(bean.getName());
            updateCustomBean.setSN(bean.getSN());
            updateCustomBean.setCitizenId("" + UserSession.getInstance().getUserInfo().getUserId());
            updateCustomBean.setClassId(bean.getId());
            arrayList.add(updateCustomBean);
        }

        RequestEntity<ArrayList<UpdateCustomBean>> entity = new RequestEntity<>();
        entity.setReqData(arrayList);

        OkHttpUtils.postString().url(Contants.APIURL.GET_UPDATECUSTOM.getUrl()).headers(entity.getHeader())
                //.mediaType(entity.getMediaType())
                .content(entity.getBody()).build().execute(new JsonCallBack<ResponseEntity<String>>()
        {
            @Override
            public void onError(Call call, Exception e, RequestCall requestCall)
            {
                dismissProgressDialog();
                ToastUtil.showLongToast("服务器繁忙，请稍后尝试。");
            }

            @Override
            public void onResponse(ResponseEntity<String> data, RequestCall requestCall)
            {
                dismissProgressDialog();

                if (data.isOK())
                {
                    selectPosition = adapterAlready.getSelectPosition();
                    Intent mIntent = new Intent();
                    mIntent.putExtra(SELECT_COLUMN, (Serializable) articleBeanList);
                    mIntent.putExtra(SELECT_COLUMN_INDEX, selectPosition);
                    ColumnCustomizationActivity.this.setResult(RESULT_OK, mIntent);
                    finish();
                }
                else
                {
                    ToastUtil.showLongToast(data.getErrorMsg());
                }
            }
        });
    }

}

activity_column_customization.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:tools="http://schemas.android.com/tools"
                                            xmlns:android="http://schemas.android.com/apk/res/android"
                                            android:layout_width="match_parent"
                                            android:layout_height="match_parent"
                                            android:background="#ffffff">
    <LinearLayout

            android:layout_width="match_parent" android:layout_height="match_parent"
            android:background="#ffffff"
            android:orientation="vertical">

        <RelativeLayout android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:padding="10dp">
            <ImageView
                    android:id="@+id/back"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@drawable/close_new"
                    android:layout_gravity="center"
                    android:padding="10dp"
                    android:layout_centerVertical="true"
            />

            <TextView
                    android:id="@+id/toolbar_title"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerInParent="true"
                    android:textSize="@dimen/statebar_title_size"
                    android:textColor="@color/color_black_111111"
                    android:text="栏目定制"/>

                <TextView
                        android:id="@+id/tv_edit"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textSize="16sp"
                        android:textColor="@color/color_black_111111"
                        android:text="完成"
                        android:visibility="invisible"
                        android:padding="10dp"
                        android:layout_centerVertical="true"
                        android:layout_alignParentRight="true"
                />


        </RelativeLayout>
        <View
                android:id="@+id/view_divider"
                android:layout_width="match_parent"
                android:layout_height="2dp"
                android:background="@color/color_gray_f4f4f4"/>
        <RelativeLayout android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:padding="10dp">
            <TextView android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:textSize="16sp"
                      android:textColor="@color/black"
                      android:text="已选栏目"/>
            <TextView android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:textSize="16sp"
                      android:textColor="@color/color_gray_999999"
                      android:text="按住拖动调整排序"
                      android:layout_alignParentRight="true"
                      android:layout_centerVertical="true"/>

        </RelativeLayout>
        <android.support.v7.widget.RecyclerView
                android:id="@+id/recyclerview_already"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="10dp"/>
        <TextView android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:textSize="16sp"
                  android:textColor="@color/black"
                  android:text="推荐栏目"
                  android:layout_margin="10dp"/>
        <View
                android:layout_width="match_parent"
                android:layout_height="2dp"
                android:background="@color/color_gray_f4f4f4"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp"/>
        <android.support.v7.widget.RecyclerView
                android:id="@+id/recyclerview_recommend"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="10dp"/>

    </LinearLayout>
</android.support.v4.widget.NestedScrollView>

drag_item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             android:layout_width="110dp"
             android:layout_height="60dp"
             android:background="@color/white"
             android:id="@+id/fragment"
            >

    <TextView
            android:id="@+id/tv_drag"
            android:layout_width="90dp"
            android:layout_height="40dp"
            android:gravity="center"
            android:layout_margin="10dp"
            android:text="测试测试"
            android:background="@drawable/rect_solid_and_stroke_gray2_corner_5dp"
            android:textColor="@color/black"/>

    <ImageView
            android:id="@+id/iv_x"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:src="@drawable/delete_new"

    />

</FrameLayout>

MyItemTouchCallback.java

public class MyItemTouchCallback extends ItemTouchHelper.Callback {

    private ItemTouchAdapter itemTouchAdapter;
    public MyItemTouchCallback(ItemTouchAdapter itemTouchAdapter){
        this.itemTouchAdapter = itemTouchAdapter;
    }

    @Override
    public boolean isLongPressDragEnabled() {
        return true;
    }

    @Override
    public boolean isItemViewSwipeEnabled() {
        return true;
    }


    @Override
    public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
        if (recyclerView.getLayoutManager() instanceof GridLayoutManager) {
            final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
            final int swipeFlags = 0;
            return makeMovementFlags(dragFlags, swipeFlags);
        } else {
            final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
            //final int swipeFlags = ItemTouchHelper.START | ItemTouchHelper.END;
            final int swipeFlags = 0;
            return makeMovementFlags(dragFlags, swipeFlags);
        }
    }

    @Override
    public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
        int fromPosition = viewHolder.getAdapterPosition();//得到拖动ViewHolder的position
        int toPosition = target.getAdapterPosition();//得到目标ViewHolder的position
        itemTouchAdapter.onMove(fromPosition,toPosition);
        return true;
    }

    @Override
    public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
        int position = viewHolder.getAdapterPosition();
        itemTouchAdapter.onSwiped(position);
    }

    @Override
    public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
        if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
            //滑动时改变Item的透明度
            final float alpha = 1 - Math.abs(dX) / (float) viewHolder.itemView.getWidth();
            viewHolder.itemView.setAlpha(alpha);
            viewHolder.itemView.setTranslationX(dX);
        } else {
            super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
        }
    }

    @Override
    public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {
       /* if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
            if (background == null && bkcolor == -1) {
                Drawable drawable = viewHolder.itemView.getBackground();
                if (drawable == null) {
                    bkcolor = 0;
                } else {
                    background = drawable;
                }
            }
            viewHolder.itemView.setBackgroundColor(Color.LTGRAY);
        }*/

        if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
            if (background == null && bkcolor == -1) {
                Drawable drawable = viewHolder.itemView.getBackground();
                if (drawable == null) {
                    bkcolor = 0;
                } else {
                    background = drawable;
                }
            }
            viewHolder.itemView.setBackgroundColor(Color.TRANSPARENT);
        }


        super.onSelectedChanged(viewHolder, actionState);
    }

    @Override
    public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
        super.clearView(recyclerView, viewHolder);

        /*viewHolder.itemView.setAlpha(1.0f);
        if (background != null) viewHolder.itemView.setBackgroundDrawable(background);
        if (bkcolor != -1) viewHolder.itemView.setBackgroundColor(bkcolor);*/
        //viewHolder.itemView.setBackgroundColor(0);

        if (onDragListener!=null){
            onDragListener.onFinishDrag();
        }
    }

    private Drawable background = null;
    private int bkcolor = -1;

    private OnDragListener onDragListener;
    public MyItemTouchCallback setOnDragListener(OnDragListener onDragListener) {
        this.onDragListener = onDragListener;
        return this;
    }
    public interface OnDragListener{
        void onFinishDrag();
    }

    public interface ItemTouchAdapter {
        void onMove(int fromPosition, int toPosition);
        void onSwiped(int position);
    }
}

RecyclerAdapter.java

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyViewHolder> implements MyItemTouchCallback.ItemTouchAdapter
{

    private Context context;
    private int src;
    private List<ArticleBean> results;
    private boolean isShowImage = false;
    private adapterInterface mAdapterInterface;
    private int selectPosition = 0;//已选择栏目的位置

    public RecyclerAdapter(int src, List<ArticleBean> results, boolean isShowImage, Context context, int selectPosition)
    {
        this.results = results;
        this.src = src;
        this.isShowImage = isShowImage;
        this.context = context;
        this.selectPosition = selectPosition;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
    {
        this.context = parent.getContext();
        View itemView = LayoutInflater.from(parent.getContext()).inflate(src, parent, false);
        return new MyViewHolder(itemView);
    }

    public void setSelectPosition(int selectPosition)
    {
        this.selectPosition = selectPosition;
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, int position)
    {
        holder.textView.setText(results.get(position).getName());
        if (position == 0&&selectPosition!=0&&selectPosition!=-1)//第一项，如果没选中，并且不等于-1(-1用来区分推荐栏目)，改变颜色
        {//第一项颜色不同，不显示删除图标
            holder.imageView.setVisibility(View.INVISIBLE);
            holder.textView.setTextColor(context.getResources().getColor(R.color.color_gray_999999));
        }
        else
        {
            if (position == selectPosition)
            {//改变已选中项目背景颜色和字体颜色
              //  holder.textView.setBackgroundResource(R.drawable.rect_solid_and_stroke_red_corner_5dp);
                holder.textView.setTextColor(Color.RED);
            }
            else
            {
                holder.textView.setBackgroundResource(R.drawable.rect_solid_and_stroke_gray2_corner_5dp);
                holder.textView.setTextColor(Color.BLACK);
            }

            if (isShowImage)
            {
                holder.imageView.setVisibility(View.VISIBLE);
            }
            else
            {
                holder.imageView.setVisibility(View.INVISIBLE);
            }
            holder.imageView.setOnClickListener(new View.OnClickListener()
            {
                @Override
                public void onClick(View v)
                {
                    if (mAdapterInterface != null)
                    {
                        mAdapterInterface.imageViewClick();
                    }
                }
            });

        }

        //显示删除按钮，可以点击
        if(isShowImage){
            holder.fragment.setOnClickListener(new View.OnClickListener()
            {
                @Override
                public void onClick(View v)
                {
                    if (mAdapterInterface != null)
                    {
                        mAdapterInterface.itemViewClick();
                    }
                }
            });
        }

    }

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

    @Override
    public void onMove(int fromPosition, int toPosition)
    {
        if (fromPosition == 0 || toPosition == 0)
        {//第一个不可拖动
            return;
        }
        if (fromPosition < toPosition)
        {
            for (int i = fromPosition; i < toPosition; i++)
            {
                Collections.swap(results, i, i + 1);
            }
        }
        else
        {
            for (int i = fromPosition; i > toPosition; i--)
            {
                Collections.swap(results, i, i - 1);
            }
        }
        notifyItemMoved(fromPosition, toPosition);
        if(fromPosition==selectPosition){//拖动的初始位置是选中项
                selectPosition=toPosition;
        }
    }

    public int getSelectPosition()
    {
        return selectPosition;
    }

    @Override
    public void onSwiped(int position)
    {
        results.remove(position);
        notifyItemRemoved(position);
    }

    public class MyViewHolder extends RecyclerView.ViewHolder
    {

        public TextView textView;
        public ImageView imageView;
        public FrameLayout fragment;

        public MyViewHolder(View itemView)
        {
            super(itemView);
          /*  WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
            int width = wm.getDefaultDisplay().getWidth();
            ViewGroup.LayoutParams layoutParams = itemView.getLayoutParams();
            layoutParams.height = width/6;
            itemView.setLayoutParams(layoutParams);*/
            textView = (TextView) itemView.findViewById(R.id.tv_drag);
            imageView = (ImageView) itemView.findViewById(R.id.iv_x);
            fragment = (FrameLayout) itemView.findViewById(R.id.fragment);
        }
    }

    public void setShowImage(boolean showImage)
    {
        isShowImage = showImage;
    }
    public void doStartEditMode(RecyclerView parent) {
        //遍历子控件，将叉号图标显示
        int visibleChildCount = parent.getChildCount();
        for (int i = 0; i < visibleChildCount; i++) {
            View view = parent.getChildAt(i);
            ImageView imgEdit = (ImageView) view.findViewById(R.id.iv_x);
            imgEdit.setVisibility(View.VISIBLE);
        }
    }


    public boolean isShowImage()
    {
        return isShowImage;
    }

    public void setmAdapterInterface(adapterInterface mAdapterInterface)
    {
        this.mAdapterInterface = mAdapterInterface;
    }

    public interface adapterInterface
    {
        public void imageViewClick();

        public void itemViewClick();//子item点击事件
    }
}

OnRecyclerItemClickListener.java

public class OnRecyclerItemClickListener implements RecyclerView.OnItemTouchListener{
    private GestureDetectorCompat mGestureDetector;
    private RecyclerView recyclerView;

    public OnRecyclerItemClickListener(RecyclerView recyclerView){
        this.recyclerView = recyclerView;
        mGestureDetector = new GestureDetectorCompat(recyclerView.getContext(),new ItemTouchHelperGestureListener());
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
        mGestureDetector.onTouchEvent(e);
        return false;
    }

    @Override
    public void onTouchEvent(RecyclerView rv, MotionEvent e) {
        mGestureDetector.onTouchEvent(e);
    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

    }

    private class ItemTouchHelperGestureListener extends GestureDetector.SimpleOnGestureListener {

        @Override
        public boolean onSingleTapUp(MotionEvent e) {
            View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
            if (child!=null) {
                RecyclerView.ViewHolder vh = recyclerView.getChildViewHolder(child);
                onItemClick(vh);
            }
            return true;
        }

        @Override
        public void onLongPress(MotionEvent e) {
            View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
            if (child!=null) {
                RecyclerView.ViewHolder vh = recyclerView.getChildViewHolder(child);
                onLongClick(vh);
            }
        }
    }

    public void onLongClick(RecyclerView.ViewHolder vh){}
    public void onItemClick(RecyclerView.ViewHolder vh){}
}

参考文献：
android开发游记：ItemTouchHelper 使用RecyclerView打造可拖拽的GridView