Android列表，筛选 ，使用RecyclerView的全选、

原文链接：https://www.jianshu.com/p/7e1e0da67864

1.布局界面

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    android:orientation="vertical">

    <include layout="@layout/action_common_bar" />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <RelativeLayout
        android:id="@+id/layout_edit"
        android:layout_width="match_parent"
        android:layout_height="@dimen/head_line_height"
        android:visibility="gone"
        tools:visibility="visible">

        <RadioButton
            android:id="@+id/rb_select_all"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="全选"
            android:textColor="@color/shop_text_selecter"
            android:textSize="16sp" />

        <Button
            android:id="@+id/btn_del"
            style="@style/DefaultOrangeButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_marginLeft="8dp"
            android:layout_marginTop="4dp"
            android:layout_marginRight="16dp"
            android:layout_marginBottom="4dp"
            android:text="删除" />
    </RelativeLayout>
</LinearLayout>

2.RecyclerView的适配器

public class MyCollectionAdapter extends BaseQuickAdapter<GoodsInfo, DataBindBaseViewHolder> {
    private ArrayList<Integer> selectArrays = new ArrayList<>();//选中数据项在列表中的位置集合
    private boolean isShowSelectBtn;//是否显示选中按钮,默认不显示
    private boolean isSelectAll;//外部【全选】按钮是否为选中状态
    public onSelectAllListener listener;//选中和取消选中监听器

    public void setListener(onSelectAllListener listener) {
        this.listener = listener;
    }

    public interface onSelectAllListener {
        void cancleSelectAll();

        void selectAll();
    }

    public MyCollectionAdapter() {
        super(R.layout.item_my_collection);
    }

    /**
     * 选中/取消
     *
     * @param selectPosition
     */
    public void setSelectPosition(Integer selectPosition) {
        boolean contains = selectArrays.contains(selectPosition);
        if (contains) {
            selectArrays.remove(selectPosition);
            //取消一项后，如果全选按钮的状态为：选中，应该取消全选按钮选中状态,但不触发取消所有列表已经选中项的事件
            if (isSelectAll) {
                isSelectAll = false;
                if (listener != null) listener.cancleSelectAll();
            }
        } else {
            //如果添加一项后，（外部[全选按钮]为：未选中&&列表数据全部选中），那么设置全选按钮为选中状态，不触发选中事件
            selectArrays.add(selectPosition);
            if (!isSelectAll && isSelectAllData()) {
                isSelectAll = true;
                if (listener != null) listener.selectAll();
            }
        }
        Collections.sort(selectArrays);
        notifyItemChanged(selectPosition);
    }

    /**
     * 全选
     */
    public void selectAll() {
        for (int i = 0; i < mData.size(); i++) {
            boolean contains = selectArrays.contains(i);
            if (!contains) selectArrays.add(i);
        }
        Collections.sort(selectArrays);//进行排序，避免因为选择前后顺序不一致，导致更新位置越界
        L.e("selectArrays==" + selectArrays.toString());
        notifyDataSetChanged();
        isSelectAll = true;
    }

    /**
     * 取消全选
     */
    public void cancleAll() {
        selectArrays.clear();
        notifyDataSetChanged();
        isSelectAll = false;
    }

    /**
     * 是否选中了所有的数据
     * 用来设定RadioButton状态
     */
    public boolean isSelectAllData() {
        return mData.size() == selectArrays.size();
    }

    /**
     * 删除选中项
     * position 为选中数据项在列表中的位置，如0,1,2，3
     * i 为当前集合遍历位置，所以remove()移除时要使用position-i
     * 例如选中 position  1和3，那么遍历两次i为 0,1
     * 由于第一次移除位置1的时候，列表数据少了一项，所以原来位置为3的变成了位置2，所以3-1=2
     * 也就是position-i才会拿到正确的列表数据位置
     */
    public void delSelect() {
        for (int i = 0; i < selectArrays.size(); i++) {
            Integer position = selectArrays.get(i);
            remove(position - i);
        }
        selectArrays.clear();
    }

    /**
     * 获得所有选中的收藏,并组装为id集合，以“，”分割的字符串
     * 方便接口删除收藏项
     *
     * @return
     */
    public String getAllSelectIds() {
        if (selectArrays.size() == 0) return "";
        StringBuffer buffer = new StringBuffer();
        for (int i = 0; i < selectArrays.size(); i++) {
            GoodsInfo dataBean = mData.get(selectArrays.get(i));
            String goodsId = dataBean.getItemId();
            buffer.append(goodsId);
            if (i < selectArrays.size() - 1) buffer.append(",");
        }
        return buffer.toString();
    }

    /**
     * 显示和隐藏操作按钮
     *
     * @param showSelectBtn
     */
    public void setShowSelectBtn(boolean showSelectBtn) {
        isShowSelectBtn = showSelectBtn;
        notifyDataSetChanged();
    }

    @Override
    protected void convert(DataBindBaseViewHolder helper, GoodsInfo item) {
        ItemMyCollectionBinding binding = (ItemMyCollectionBinding) helper.getBinding();
        binding.setItem(item);
        binding.couponPrice.setCouponText(item.getCouponMoney() + "元");
        helper.addOnClickListener(R.id.rb_select);
        //是否显示操作按钮
        if (isShowSelectBtn) {
            binding.rbSelect.setVisibility(View.VISIBLE);
            boolean contains = selectArrays.contains(helper.getLayoutPosition());//是否选中
            binding.rbSelect.setChecked(contains);
        } else {
            binding.rbSelect.setVisibility(View.GONE);
        }
    }

}

其中适配器布局文件item_my_collection

<?xml version="1.0" encoding="utf-8"?>
<layout>
    <data>
        <import type="cn.com.smallcake_utils.SpannableStringUtils" />
        <variable
            name="item"
            type="**.GoodsInfo" />
    </data>
    <android.support.constraint.ConstraintLayout 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="wrap_content"
        android:background="@color/white">
        <RadioButton
            android:id="@+id/rb_select"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:visibility="gone"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:visibility="visible" />
        <ImageView
            android:id="@+id/iv_pict_url"
            imageRoundUrl="@{item.itemPic}"
            android:layout_width="130dp"
            android:layout_height="130dp"
            android:layout_marginStart="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toEndOf="@+id/rb_select"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.0"
            tools:src="@mipmap/logo" />
        <TextView
            android:id="@+id/tv_title"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="4dp"
            android:layout_marginRight="4dp"
            android:maxLines="2"
            android:text="@{item.itemTitle}"
            android:textColor="@color/text_black"
            android:textSize="14sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/iv_pict_url"
            app:layout_constraintTop_toTopOf="parent"
            tools:text="婴儿湿巾80抽x5包便携式迷你带盖批发新生儿棉柔巾婴儿湿巾80抽x5包便携式迷你带盖批发新生儿棉柔巾" />
        <ImageView
            android:id="@+id/iv_user_type"
            isTmall="@{item.isTmall}"
            android:layout_width="14dp"
            android:layout_height="14dp"
            android:layout_marginStart="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginTop="8dp"
            android:src="@mipmap/icon_tmall"
            app:layout_constraintStart_toEndOf="@+id/iv_pict_url"
            app:layout_constraintTop_toBottomOf="@+id/tv_title" />

        <TextView
            android:id="@+id/tv_shop_title"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="2dp"
            android:layout_marginLeft="2dp"
            android:layout_weight="1"
            android:ellipsize="end"
            android:maxLines="1"
            android:text="@{item.shopName}"
            android:textSize="12sp"
            app:layout_constraintBottom_toBottomOf="@+id/iv_user_type"
            app:layout_constraintEnd_toStartOf="@+id/tv_volume"
            app:layout_constraintStart_toEndOf="@+id/iv_user_type"
            app:layout_constraintTop_toTopOf="@+id/iv_user_type"
            tools:text="天真贝比旗舰店" />
        <TextView
            android:id="@+id/tv_volume"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginRight="8dp"
            android:text='@{@string/sold+item.itemSale}'
            android:textSize="12sp"
            app:layout_constraintBottom_toBottomOf="@+id/tv_shop_title"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="1.0"
            app:layout_constraintStart_toEndOf="@+id/tv_shop_title"
            app:layout_constraintTop_toTopOf="@+id/tv_shop_title"
            app:layout_constraintVertical_bias="0.0"
            tools:text="@string/sold" />
        <TextView
            android:id="@+id/tv_commission_price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginRight="8dp"
            android:layout_marginBottom="8dp"
            android:background="@drawable/round2_pink_bg"
            android:ellipsize="start"
            android:paddingLeft="4dp"
            android:paddingTop="2dp"
            android:paddingRight="4dp"
            android:paddingBottom="2dp"
            android:singleLine="true"
            android:text='@{@string/ygsy_y+item.commision}'
            android:textColor="@color/tab_orange"
            android:textSize="12sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            tools:text="预估收益10元" />
        <**.CouponBg
            android:id="@+id/coupon_price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginRight="8dp"
            android:layout_marginBottom="8dp"
            app:layout_constraintBottom_toTopOf="@+id/tv_commission_price"
            app:layout_constraintEnd_toEndOf="parent"
            tools:coupon_price="15元" />
        <TextView
            android:id="@+id/tv_zk_final_price"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginBottom="8dp"
            android:ellipsize="start"
            android:singleLine="true"
            android:text='@{SpannableStringUtils.getBuilder(@string/quan_hou).setProportion(0.8f).append(@string/rmb_symbol).setProportion(0.7f).setBold().append(item.itemEndPrice).setBold().create()}'
            android:textColor="@color/tab_orange"
            android:textSize="16sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toStartOf="@+id/tv_commission_price"
            app:layout_constraintStart_toEndOf="@+id/iv_pict_url"
            tools:text="券后￥19.8" />
        <TextView
            android:id="@+id/tv_reserve_price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginBottom="4dp"
            android:text='@{SpannableStringUtils.getBuilder(@string/yuan_jia+item.itemPrice).setStrikethrough().create()}'
            android:textColor="@color/text_gray"
            android:textSize="11sp"
            app:layout_constraintBottom_toTopOf="@+id/tv_zk_final_price"
            app:layout_constraintStart_toEndOf="@+id/iv_pict_url"
            tools:text="原价￥149.9" />
        <View
            android:layout_width="match_parent"
            android:layout_height="1.5dp"
            android:layout_marginStart="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginEnd="8dp"
            android:layout_marginRight="8dp"
            android:background="@drawable/h_gray_dot_line"
            android:layerType="software"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />
    </android.support.constraint.ConstraintLayout>
</layout>

3.使用，主要就三个操作+适配器操作

    @OnClick({R.id.tv_right, R.id.rb_select_all, R.id.btn_del})
    public void doClicks(View view) {
        switch (view.getId()) {
            case R.id.tv_right://操作的显示和隐藏
                edit();
                break;
            case R.id.rb_select_all://全选/取消全选
                clickSelectAll();
                break;
            case R.id.btn_del://删除
                del();
                break;
        }
    }

• a.点击顶部右侧，来显示和隐藏列表中的操作按钮和底部的全选删除按钮edit()

    private void edit() {
        String s = tvRight.getText().toString();
        if (s.equals("管理")){
            tvRight.setText("取消");
            mAdapter.setShowSelectBtn(true);
            layoutEdit.setVisibility(View.VISIBLE);
        }else {
            tvRight.setText("管理");
            mAdapter.setShowSelectBtn(false);
            layoutEdit.setVisibility(View.GONE);
        }
    }

• b.全选按钮的触发效果

    private void clickSelectAll() {
        if (mAdapter.isSelectAllData()) {
            rbSelectAll.setChecked(false);
            mAdapter.cancleAll();
        } else {
            rbSelectAll.setChecked(true);
            mAdapter.selectAll();
        }
    }

• c.删除

    private void del() {
        String allSelectIds = mAdapter.getAllSelectIds();
        if (TextUtils.isEmpty(allSelectIds)) {
            ToastUtil.showLong("未选中任何项！");
            return;
        }
        //刷新适配器
        dataProvider.user.delCol(user.getUid(), user.getToken(), allSelectIds)
                .subscribe(new OnSuccessAndFailListener<BaseResponse>(dialog) {
                    @Override
                    protected void onSuccess(BaseResponse baseResponse) {
                        ToastUtil.showLong(baseResponse.getMsg());
                        //刷新适配器
                        mAdapter.delSelect();
                    }
                });
    }

• d.适配器操作

    private void onEvent() {
        //加载更多
        mAdapter.setOnLoadMoreListener(new BaseQuickAdapter.RequestLoadMoreListener() {
            @Override
            public void onLoadMoreRequested() {
                if (page < totalPages) {
                    page++;
                    getMyCollection();
                } else {
                    mAdapter.loadMoreEnd();
                }
            }
        }, recyclerView);
        //进入商品详情
        mAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                GoodsInfo item = (GoodsInfo) adapter.getItem(position);
                jumpToFragmentByType(item);
            }
        });

        //单条数据项的选中和取消选中
        mAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
            @Override
            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
                mAdapter.setSelectPosition(position);
            }
        });

        //全选后，取消一项，解除全选按钮选中状态,选中一项后，如果已经全选，改变全选按钮状态为选中
        mAdapter.setListener(new MyCollectionAdapter.onSelectAllListener() {
            @Override
            public void cancleSelectAll() {
                rbSelectAll.setChecked(false);
            }

            @Override
            public void selectAll() {
                rbSelectAll.setChecked(true);
            }
        });
    }

PS：适配器使用BaseRecyclerViewAdapterHelper+DataBind的方式,效果如下:

全选，单选