Question

我有一个自定义卡片列表视图..该视图包含一个imageView和三个按钮..

我想要做的是当我点击一个按钮时，我想设置在imageView对象中保存该按钮的卡的图像..

setSelectedimage（）会在视图持有者的最后一张卡片中设置一张而不是点击的卡片。

这是我的getView代码：

@Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        view = convertView;
        if (view == null) {
            view = LayoutInflater.from(mContext).inflate(
                    R.layout.home_card, parent, false);

            viewHolder = new ViewHolder();
            view.setTag(viewHolder);

            viewHolder.imageView = (ImageView) view
                    .findViewById(R.id.activity_googlecards_card_imageview);
            viewHolder.favIB = (ImageButton) view
                    .findViewById(R.id.fav_imagebutton);
            viewHolder.editIB = (ImageButton) view
                    .findViewById(R.id.edit_imagebutton);
            viewHolder.shareIB = (ImageButton) view
                    .findViewById(R.id.share_imagebutton);
        } else {
            viewHolder = (ViewHolder) view.getTag();
        }
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(imageWidth,imageWidth);
        viewHolder.imageView.setLayoutParams(params);
        viewHolder.imageView.setTag(position);

        OnClickListener myOnClickListener = new OnClickListener() {

            @Override
            public void onClick(View v) {
                int id = v.getId();
                String msg = " clicked";

                switch (id) {
                case R.id.fav_imagebutton:
                    msg = "favourite" + msg;
                    break;

                case R.id.edit_imagebutton:
                    msg = "edit" + msg;

                    viewHolder = (ViewHolder) view.getTag();
                    System.out.println(viewHolder.imageView.getTag());
                    setSelectedImage(viewHolder.imageView);
                    break;

                case R.id.share_imagebutton:
                    msg = "share" + msg;
                    break;

                default:
                    break;
                }

        };

        viewHolder.favIB.setOnClickListener(myOnClickListener);
        viewHolder.editIB.setOnClickListener(myOnClickListener);
        viewHolder.shareIB.setOnClickListener(myOnClickListener);

        return view;
    }

这是我的viewHolder类：

private static class ViewHolder {
        ImageView imageView;
        ImageButton favIB;
        ImageButton editIB;
        ImageButton shareIB;
    }

提前致谢，

Answer 1

点击侦听器中的这一行是问题：

viewHolder = (ViewHolder) view.getTag();

点击期间收到的view是实际点击的视图，这意味着onClick(View v) case R.id.edit_imagebutton的{{1}} View v是ImageButton editIB。

所以当你要求它的标签时，没有标签，因为你从未设置过标签。您应该将标记设置为能够检索它。

viewHolder.editIB.setTag(viewHolder);


@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
        convertView = LayoutInflater.from(mContext).inflate(
                R.layout.home_card, parent, false);

        viewHolder = new ViewHolder();
        convertView.setTag(viewHolder);

        viewHolder.imageView = (ImageView) convertView
                .findViewById(R.id.activity_googlecards_card_imageview);
        viewHolder.favIB = (ImageButton) convertView
                .findViewById(R.id.fav_imagebutton);
        viewHolder.editIB = (ImageButton) convertView
                .findViewById(R.id.edit_imagebutton);
        viewHolder.editIB.setTag(viewHolder); // THIS
        viewHolder.shareIB = (ImageButton) convertView
                .findViewById(R.id.share_imagebutton);


    OnClickListener myOnClickListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
            int id = v.getId();
            String msg = " clicked";

            switch (id) {
            case R.id.fav_imagebutton:
                msg = "favourite" + msg;
                break;

            case R.id.edit_imagebutton:
                msg = "edit" + msg;

                viewHolder = (ViewHolder) v.getTag(); // HERE
                setSelectedImage(viewHolder.imageView);
                break;

            case R.id.share_imagebutton:
                msg = "share" + msg;
                break;

            default:
                break;
            }

    };

    viewHolder.favIB.setOnClickListener(myOnClickListener);
    viewHolder.editIB.setOnClickListener(myOnClickListener);
    viewHolder.shareIB.setOnClickListener(myOnClickListener);

    } else {
        viewHolder = (ViewHolder) convertView.getTag();
    }
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(imageWidth,imageWidth);
    viewHolder.imageView.setLayoutParams(params);
    viewHolder.imageView.setTag(position);

    return view;
}

Answer 2

试试这个：

viewHolder.editIB.setOnClickListener(new OnClickListener() {
            ImageView iv = viewHolder.imageView;
            @Override
            public void onClick(View v) {

                //you can use iv here it will get the right image

            }
        });

Answer 3

 viewHolder.imageView = (ImageView) view
                .findViewById(R.id.activity_googlecards_card_imageview);

更改为view.imageView = (ImageView) view .findViewById(R.id.activity_googlecards_card_imageview);

Answer 4

你应该使用你的布局的层次结构来获取View。这可能对你有帮助 -

 viewHolder.imageView.setTag(position);

        OnClickListener myOnClickListener = new OnClickListener() {

            @Override
            public void onClick(View v) {
                int id = v.getId();
                String msg = " clicked";

                switch (id) {
                case R.id.fav_imagebutton:
                    msg = "favourite" + msg;
                    break;

                case R.id.edit_imagebutton:
                    msg = "edit" + msg;

                    //get sibling view using hierarchy like 
                    EditText et = (EditText)v;

                    // fetch its parent and cast to class whatever it is RelativeLayout or LinearLayout
                    // eg. Relativelayout is edittext' parent in layout                      
                    RelativeLayout rl = (RelativeLayout)et.getParent();

                    // Now get its child named activity_googlecards_card_imageview
                    ImageView imageView = (ImageView) rl.findViewById(R.id.activity_googlecards_card_imageview);

                    System.out.println(imageView.getTag());
                    setSelectedImage(imageView);
                    break;

                case R.id.share_imagebutton:
                    msg = "share" + msg;
                    break;

                default:
                    break;
                }

        };

       viewHolder.favIB.setOnClickListener(myOnClickListener);
        viewHolder.editIB.setOnClickListener(myOnClickListener);
        viewHolder.shareIB.setOnClickListener(myOnClickListener);

无法通过view.getTag（）在列表中获取正确的视图

4 个答案: