在列表视图不能正常工作复选框 [英] check box in listview not working properly

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本文介绍了在列表视图不能正常工作复选框的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我实现与ListView控件的listview.The问题我得到的每一个ITEN的复选框，当我点击任何一个复选框，当我滚动然后这是不是也点击了一些其他复选框越来越点击随机。我经历了许多链接继续左右，但它did'nt解决我的问题。 

 公共类CustomListViewAdapter扩展ArrayAdapter＆LT;客户＆GT; {

ViewHolder支架=无效;
私人LayoutInflater充气= NULL;
私人的ArrayList＆LT;客户＆GT;订单系统= NULL;
ArrayList的＆LT;视图＆gt; allViews;

公共CustomListViewAdapter（上下文的背景下，INT资源，
        名单＆LT;客户＆GT;对象）{
    超（背景下，资源对象）;

    订单系统=（Ar​​rayList的＆LT;客户＆GT;）的对象;
    充气=（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
    allViews =新的ArrayList＆LT;视图＆gt;（）;
}

@覆盖
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
    如果（convertView == NULL）{
        convertView = inflator.inflate（R.layout.listview_add_order，NULL）;
        持有人=新ViewHolder（）;
        convertView.setTag（保持器）;
        holder.txtViewName =（TextView中）convertView.findViewById（R.id.txtViewAddOrder）;
        holder.spinnerAddorder =（微调）convertView.findViewById（R.id.spinnerAddOrder）;
        holder.checkAddorder =（复选框）convertView.findViewById（R.id.checkAddOrder）;
        holder.checkAddorder.setTag（保持器）;
    } 其他 {
        支架=（ViewHolder）convertView.getTag（）;


        holder.checkAddorder.setTag（保持器）;
    }

    allViews.add（位置，holder.spinnerAddorder）;

    holder.checkAddorder.setOnClickListener（新OnClickListener（）{

        @覆盖
        公共无效的onClick（视图查看）{
            复选框CCHK =（复选框）视图;
            ViewHolder checkPosition =（ViewHolder）view.getTag（）;


            如果（cchk.isChecked（））{

                checkPosition.spinnerAddorder.setVisibility（View.VISIBLE）;

            } 其他 {
                checkPosition.spinnerAddorder.setVisibility（View.INVISIBLE）;
            }
        }
    }）;

    名单＆LT;字符串＆GT;名单=新的ArrayList＆LT;字符串＆GT;（）;
    list.add（选择数量）;
    list.add（1）;
    list.add（2）;
    list.add（3）;
    ArrayAdapter＆LT;字符串＆GT; DataAdapter的=新的ArrayAdapter＆LT;字符串＆GT;（this.getContext（），R.layout.spinner_add_order_style，清单）;
    dataAdapter.setDropDownViewResource（android.R.layout.simple_spinner_item）;
    holder.spinnerAddorder.setAdapter（DataAdapter的）;

    如果（holder.checkAddorder.isChecked（））{


        ViewHolder checkPosition =（ViewHolder）holder.checkAddorder.getTag（）;
        checkPosition.spinnerAddorder.setVisibility（View.VISIBLE）;
    } 其他 {

        ViewHolder checkPosition =（ViewHolder）holder.checkAddorder.getTag（）;
        checkPosition.spinnerAddorder.setVisibility（View.INVISIBLE）;
    }


    客户订单= orderList.get（位置）;

    holder.txtViewName.setText（order.getFirstName（））;
    返回convertView;
}

私有静态类ViewHolder {
    公众的TextView txtViewName = NULL;
    公共微调spinnerAddorder = NULL;
    公开复选框checkAddorder = NULL;
}

     }

我的XML文件

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：重力=center_vertical
机器人：方向=横向
机器人：以下属性来=5DP
机器人：paddingRight =5DP
机器人：weightSum =2＆GT;

＆LT;的TextView
    机器人：ID =@ + ID / txtViewAddOrder
    机器人：layout_width =0dp
    机器人：layout_height =match_parent
    机器人：layout_weight =1.2
    机器人：文本=TextView的
    机器人：TEXTSIZE =25sp/＆GT;

＆LT;微调
    机器人：ID =@ + ID / spinnerAddOrder
    机器人：layout_width =0dp
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_weight =8
    机器人：背景=@可绘制/下拉/＆GT;

＆LT;复选框
    机器人：ID =@ + ID / checkAddOrder
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_marginLeft =20dp/＆GT;

 ＆LT; / LinearLayout中＆GT;

解决方案

这是发生因为从回收利用。你需要做的是保持布尔说，每一个复选框被选中拨动相应的布尔时间的数组。然后在你的getview检查相应的布尔数组的位置，并设置复选框的状态。

在这些方面：我已经修改了它，所以它会显示正常。没有检查什么的code剩下的就是高达。 ^ _ ^ 

 公共类CustomListViewAdapter扩展ArrayAdapter＆LT;客户＆GT; {

ViewHolder支架=无效;
私人LayoutInflater充气= NULL;
私人的ArrayList＆LT;客户＆GT;订单系统= NULL;
ArrayList的＆LT;视图＆gt; allViews;

布尔[] checkedStates; //********** 新 ********

公共CustomListViewAdapter（上下文的背景下，INT资源，
        名单＆LT;客户＆GT;对象）{
    超（背景下，资源对象）;

    订单系统=（Ar​​rayList的＆LT;客户＆GT;）的对象;
    充气=（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
    allViews =新的ArrayList＆LT;视图＆gt;（）;

    checkedStates =新的布尔[objects.size（）]; //********** 新 ********
}

@Override // **********新********位置的说法是，现在最后
公共查看getView（最终诠释的立场，观点convertView，ViewGroup中父）{
    如果（convertView == NULL）{
        convertView = inflator.inflate（R.layout.listview_add_order，NULL）;
        持有人=新ViewHolder（）;
        convertView.setTag（保持器）;
        holder.txtViewName =（TextView中）convertView.findViewById（R.id.txtViewAddOrder）;
        holder.spinnerAddorder =（微调）convertView.findViewById（R.id.spinnerAddOrder）;
        holder.checkAddorder =（复选框）convertView.findViewById（R.id.checkAddOrder）;
        holder.checkAddorder.setTag（保持器）;
    } 其他 {
        支架=（ViewHolder）convertView.getTag（）;


        holder.checkAddorder.setTag（保持器）;
    }

    allViews.add（位置，holder.spinnerAddorder）;

    holder.checkAddorder.setOnClickListener（新OnClickListener（）{

        @覆盖
        公共无效的onClick（视图查看）{

              ！checkedStates [位置] = checkedStates [位置] //********** 新 ********
        }
    }）;

    holder.chechAddorder.setChecked（checkedStates [位置]）; //********** 新 ********

    名单＆LT;字符串＆GT;名单=新的ArrayList＆LT;字符串＆GT;（）;
    list.add（选择数量）;
    list.add（1）;
    list.add（2）;
    list.add（3）;
    ArrayAdapter＆LT;字符串＆GT; DataAdapter的=新的ArrayAdapter＆LT;字符串＆GT;（this.getContext（），R.layout.spinner_add_order_style，清单）;
    dataAdapter.setDropDownViewResource（android.R.layout.simple_spinner_item）;
    holder.spinnerAddorder.setAdapter（DataAdapter的）;

    如果（checkedStates [位置]）{// ********** NEWEST ********假设真的被选中，假被选中


        ViewHolder checkPosition =（ViewHolder）holder.checkAddorder.getTag（）;
        checkPosition.spinnerAddorder.setVisibility（View.VISIBLE）;
    } 其他 {

        ViewHolder checkPosition =（ViewHolder）holder.checkAddorder.getTag（）;
        checkPosition.spinnerAddorder.setVisibility（View.INVISIBLE）;
    }


    客户订单= orderList.get（位置）;

    holder.txtViewName.setText（order.getFirstName（））;
    返回convertView;
}

私有静态类ViewHolder {
    公众的TextView txtViewName = NULL;
    公共微调spinnerAddorder = NULL;
    公开复选框checkAddorder = NULL;
}

     }

I am implementing the checkbox with listview for every Iten of listview.The Problem i am getting is when I am clicking on any single check box and when i scroll then some other checkboxes which are not clicked also getting clicked randomly. i went through many link on SO but it did'nt solve my problem. 

public class CustomListViewAdapter extends ArrayAdapter<Client> {

ViewHolder holder = null;
private LayoutInflater inflator = null;
private ArrayList<Client> orderList = null;
ArrayList<View> allViews;

public CustomListViewAdapter(Context context, int resource,
        List<Client> objects) {
    super(context, resource, objects);

    orderList = (ArrayList<Client>) objects;
    inflator = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    allViews = new ArrayList<View>();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if(convertView == null) {
        convertView = inflator.inflate(R.layout.listview_add_order, null);
        holder = new ViewHolder();
        convertView.setTag(holder);
        holder.txtViewName = (TextView) convertView.findViewById(R.id.txtViewAddOrder);
        holder.spinnerAddorder = (Spinner) convertView.findViewById(R.id.spinnerAddOrder);
        holder.checkAddorder = (CheckBox) convertView.findViewById(R.id.checkAddOrder);
        holder.checkAddorder.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();


        holder.checkAddorder.setTag(holder);
    }

    allViews.add(position, holder.spinnerAddorder);

    holder.checkAddorder.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View view) {
            CheckBox cchk = (CheckBox)view;
            ViewHolder checkPosition = (ViewHolder) view.getTag();


            if(cchk.isChecked()) {

                checkPosition.spinnerAddorder.setVisibility(View.VISIBLE);

            } else {
                checkPosition.spinnerAddorder.setVisibility(View.INVISIBLE);
            }
        }
    });

    List<String> list = new ArrayList<String>();
    list.add("Select Quantity");
    list.add("1");
    list.add("2");
    list.add("3");
    ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this.getContext(),R.layout.spinner_add_order_style, list);
    dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
    holder.spinnerAddorder.setAdapter(dataAdapter);

    if(holder.checkAddorder.isChecked()) {


        ViewHolder checkPosition = (ViewHolder) holder.checkAddorder.getTag();
        checkPosition.spinnerAddorder.setVisibility(View.VISIBLE);
    } else {

        ViewHolder checkPosition = (ViewHolder) holder.checkAddorder.getTag();
        checkPosition.spinnerAddorder.setVisibility(View.INVISIBLE);
    }


    Client order = orderList.get(position);

    holder.txtViewName.setText(order.getFirstName());
    return  convertView;
}

private static class ViewHolder {
    public TextView txtViewName = null;
    public Spinner spinnerAddorder = null;
    public CheckBox checkAddorder = null;
}

     }

my xml file is

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:weightSum="2" >

<TextView
    android:id="@+id/txtViewAddOrder"
    android:layout_width="0dp"
    android:layout_height="match_parent"
    android:layout_weight="1.2"
    android:text="TextView"
    android:textSize="25sp" />

<Spinner
    android:id="@+id/spinnerAddOrder"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight=".8"
    android:background="@drawable/dropdown" />

<CheckBox
    android:id="@+id/checkAddOrder"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="20dp" />

 </LinearLayout>

解决方案

This is happening because of view recycling. What you need to do is maintain an array of say booleans and every time a checkbox is checked toggle the corresponding boolean. Then in your getview check the corresponding boolean array position and set the state of the check box.

Along these lines: I have modified it so it displays correctly. Have not checked what the rest of your code is upto. ^_^

public class CustomListViewAdapter extends ArrayAdapter<Client> {

ViewHolder holder = null;
private LayoutInflater inflator = null;
private ArrayList<Client> orderList = null;
ArrayList<View> allViews;

boolean[] checkedStates; //********** NEW ********

public CustomListViewAdapter(Context context, int resource,
        List<Client> objects) {
    super(context, resource, objects);

    orderList = (ArrayList<Client>) objects;
    inflator = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    allViews = new ArrayList<View>();

    checkedStates = new boolean[objects.size()]; //********** NEW ********
}

@Override   //********** NEW ******** position argument is now final 
public View getView(final int position, View convertView, ViewGroup parent) {
    if(convertView == null) {
        convertView = inflator.inflate(R.layout.listview_add_order, null);
        holder = new ViewHolder();
        convertView.setTag(holder);
        holder.txtViewName = (TextView) convertView.findViewById(R.id.txtViewAddOrder);
        holder.spinnerAddorder = (Spinner) convertView.findViewById(R.id.spinnerAddOrder);
        holder.checkAddorder = (CheckBox) convertView.findViewById(R.id.checkAddOrder);
        holder.checkAddorder.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();


        holder.checkAddorder.setTag(holder);
    }

    allViews.add(position, holder.spinnerAddorder);

    holder.checkAddorder.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View view) {

              checkedStates[position] = !checkedStates[position]; //********** NEW ********
        }
    });

    holder.chechAddorder.setChecked(checkedStates[position]); //********** NEW ********

    List<String> list = new ArrayList<String>();
    list.add("Select Quantity");
    list.add("1");
    list.add("2");
    list.add("3");
    ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this.getContext(),R.layout.spinner_add_order_style, list);
    dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
    holder.spinnerAddorder.setAdapter(dataAdapter);

    if(checkedStates[position]) { //********** NEWEST ******** assuming true is checked and false is unchecked


        ViewHolder checkPosition = (ViewHolder) holder.checkAddorder.getTag();
        checkPosition.spinnerAddorder.setVisibility(View.VISIBLE);
    } else {

        ViewHolder checkPosition = (ViewHolder) holder.checkAddorder.getTag();
        checkPosition.spinnerAddorder.setVisibility(View.INVISIBLE);
    }


    Client order = orderList.get(position);

    holder.txtViewName.setText(order.getFirstName());
    return  convertView;
}

private static class ViewHolder {
    public TextView txtViewName = null;
    public Spinner spinnerAddorder = null;
    public CheckBox checkAddorder = null;
}

     }

这篇关于在列表视图不能正常工作复选框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！

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