在RecyclerView中保存复选框状态 [英] Save Checkbox state in RecyclerView

问题描述

我有一个选项列表， CheckBoxes 在 RecyclerView 。当我点击复选框的状态改变，但上下滚动后复选框的状态丢失。

I have a list of options with CheckBoxes in RecyclerView. When I tap on checkbox the state is changed, but after scrolling up and down the state of the checkboxes are losts.

如何保存复选框的状态？我尝试更改适配器中的状态：

How to save state of checkboxes ? I'm trying to change the state in adapter:

private void setAdapter() {
    if (mAdapter == null) {
        mAdapter = new FacetChildAdapter(mValues, getActivity(), query.getSpecValueAsString(mParentValue.getSlug())) {
            @Override
            protected void onCheckBoxRowClicked(CheckboxRow box, Value value, int adapterPosition) {
                if (type == FacetChildType.Brands) {
                    if (box.isChecked()) {
                        query.removeBrand(value);
                    } else {
                        query.addBrand(value);
                    }
                }

                else if (type == FacetChildType.Categories) {
                    if (box.isChecked()) {
                        query.removeCategory(value);
                    } else {
                        query.addCategory(value);
                    }
                }

                else if (type == FacetChildType.Deals) {
                    if (box.isChecked()) {
                        query.removeDealType(value);
                    } else {
                        query.addDealType(value);
                    }
                }

                else if (type == FacetChildType.Specifications) {
                    if (box.isChecked()) {
                        query.removeSpecification(mParentValue.getSlug(), value);
                    } else {
                        query.addSpecification(mParentValue.getSlug(), value);
                    }
                }

                box.setChecked(!box.isChecked());
                mHeading.setBackText(getResources().getString(R.string.apply));
            }

        };
        mRecyclerView.setAdapter(mAdapter);

    } else {
        mAdapter.setSource(query.getSpecValueAsString(mParentValue.getSlug()));
        mAdapter.refresh(mValues);
    }

}

FacetChildAdapter：

FacetChildAdapter:

public class FacetChildAdapter extends GenericRecycleAdapter<Value, Holders.TextImageHolder> {
private String source;


public FacetChildAdapter(List<Value> list, Context context, String source) {
    super(list, context);
    this.source = source;
}

public void setSource(String source) {
    this.source = source;
}

@Override
protected void onItem(Value s) {

}

public Holders.TextImageHolder getCustomHolder(View v) {
    return new Holders.TextImageHolder(v) {
        @Override
        public void onCheckBoxRowClicked(CheckboxRow v) {
            FacetChildAdapter.this.onCheckBoxRowClicked(v, mList.get(getAdapterPosition()), getAdapterPosition());

        }
    };
}

protected void onCheckBoxRowClicked(CheckboxRow box, Value value, int adapterPosition) {

}

@Override
public int getLayout() {
    return R.layout.facet_child_row;
}

@Override
public void onSet(final Value item,final Holders.TextImageHolder holder) {
    holder.checkboxRow.setTitle(Html.fromHtml(item.getFullName()));
    holder.checkboxRow.setSubText("(" + String.valueOf(item.getCount()) + ")");
    holder.checkboxRow.setChecked(ShowProductsWithId.containsValueInValueStringLine(source, item.getSlug()));
    holder.checkboxRow.setDisabled(!item.isEnabled());

}

}

推荐答案

它可以通过两种方式维护：

It can Maintain in two ways:

1）使用Hashmap来存储复选框视图的位置。
您可以存储位置并存储特殊视图的唯一ID，然后在Adapter中使用可以很容易地获得复选框的位置。

1) Use the Hashmap to store the position of check box view. You can store the position and also store the Unique id of Particular view and then after in Adapter use can easily get the check box position in it.

2 ）当你可以使用Getter setter类，然后你创建一个整数变量，然后你可以很容易地设置这个变量中的位置，如

2) When You can use the Getter setter class then you do create the one integer variable in it and then You can easily set the position in this variable like

• 当您可以选中复选框，然后变量值为1


• 当您可以取消选中该复选框时，变量值为0

维护您的复选框位置已选中或未选中，方法如下。

Maintain Your check box Position checked or unchecked in below ways.

这篇关于在RecyclerView中保存复选框状态的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！