Question

我有一个OnClickListener的线性布局。监听器正在工作，但它在多行上被触发（当通过列表时，还有其他行也有效果）。

以下是getView中ArrayAdapter的代码。

@Override
    public View getView(int position, View convertView, ViewGroup parent) {

    final TaskRowHolder holder;

    if (convertView == null)
    {
        holder = new TaskRowHolder();

        LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
        convertView = inflater.inflate(layoutResourceId, parent, false);


        holder.audit_flag = (ImageView) convertView.findViewById(R.id.audit_flag);
        holder.expandable = (LinearLayout) convertView.findViewById(R.id.expandable);
        holder.camera_button = (ImageButton) convertView.findViewById(R.id.camera_button);
        holder.forms_button = (ImageButton) convertView.findViewById(R.id.forms_button);
        holder.attachments_button = (ImageButton) convertView.findViewById(R.id.attachments_button);
        holder.label = (LinearLayout) convertView.findViewById(R.id.label);
        holder.functions_layout = (LinearLayout) convertView.findViewById(R.id.functions_layout);
        holder.expandable_icon = (ImageView) convertView.findViewById(R.id.expandabl_icon);


        convertView.setTag(holder);
    }
    else
    {
        holder = (TaskRowHolder) convertView.getTag();
    }

    holder.expandable.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view)
        {
            if (!holder.functions_layout.isShown())
            {
                holder.functions_layout.setVisibility(View.VISIBLE);
             holder.expandable_icon.setBackgroundResource(R.drawable.arrow_up);
                holder.label.setAnimation(null);
                holder.label.startAnimation(animationDown);
            }
            else
            {
                holder.functions_layout.setVisibility(View.GONE);
                holder.expandable_icon.setBackgroundResource(R.drawable.arrow_down);
                holder.label.setAnimation(null);
                holder.label.startAnimation(animationDown);
            }
        }
    });
.
.
.
.

Answer 1

正如@Vlad Matvienko评论的那样，由于可重用性，这是一种预期的行为。我将我的代码编辑为以下内容。

ArrayList<String> expandablesClicked = new ArrayList<>();  //storing the row positions.

@Override
    public View getView(int position, View convertView, ViewGroup parent) {

    final TaskRowHolder holder;

    if (convertView == null)
    {
        holder = new TaskRowHolder();

        LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
        convertView = inflater.inflate(layoutResourceId, parent, false);


        holder.audit_flag = (ImageView) convertView.findViewById(R.id.audit_flag);
        holder.expandable = (LinearLayout) convertView.findViewById(R.id.expandable);
        holder.camera_button = (ImageButton) convertView.findViewById(R.id.camera_button);
        holder.forms_button = (ImageButton) convertView.findViewById(R.id.forms_button);
        holder.attachments_button = (ImageButton) convertView.findViewById(R.id.attachments_button);
        holder.label = (LinearLayout) convertView.findViewById(R.id.label);
        holder.functions_layout = (LinearLayout) convertView.findViewById(R.id.functions_layout);
        holder.expandable_icon = (ImageView) convertView.findViewById(R.id.expandabl_icon);


        convertView.setTag(holder);
    }
    else
    {
        holder = (TaskRowHolder) convertView.getTag();
    }

    holder.expandable.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view)
        {


            if (!expandablesClicked.contains(position+"")) //ADDED
            {
                expandablesClicked.add(position+"");  //ADDED
                holder.functions_layout.setVisibility(View.VISIBLE);
    holder.expandable_icon.setBackgroundResource(R.drawable.arrow_up);
                holder.label.setAnimation(null);
                holder.label.startAnimation(animationDown);
            }
            else
            {
                expandablesClicked.remove(position+""); //ADDED

                holder.functions_layout.setVisibility(View.GONE);
    holder.expandable_icon.setBackgroundResource(R.drawable.arrow_down);
                holder.label.setAnimation(null);
                holder.label.startAnimation(animationDown);
            }
        }
    });

         //ADDED
        if (!expandablesClicked.contains(position+""))
        {
            holder.functions_layout.setVisibility(View.GONE);
   holder.expandable_icon.setBackgroundResource(R.drawable.arrow_down);
        }
        else
        {
            holder.functions_layout.setVisibility(View.VISIBLE);

holder.expandable_icon.setBackgroundResource（R.drawable.arrow_up）; } 。。。

Answer 2

如果您希望尽可能轻松地处理您提到的所需行为（一次只点击一个列表行），请使用setOnItemClickListener而不是在每个视图上应用onClickListener并检查多个条件。实施就像 -

yourlist.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
   @Override 
   public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
      Object listItem = list.getItemAtPosition(position);  //get your view restricted to your list row here and typecast to required layout.
   }  
});

是的，这只会在您点击的行上调用。

在多行上触发的ListView行中单击侦听器上的视图

2 个答案: