In listview adapter replace image on click of that image

问题

I have to change image on click of that image.whan I am trying to do that it is changing image but not at that position,at a random position. Code

     public class InteractiveArrayAdapter extends
    ArrayAdapter<HashMap<String, String>> {
public boolean[] checkBoxState;
boolean[] favStar;
ViewHolder viewholder;
// private Object inflater;
private LayoutInflater inflater;
private ArrayList<HashMap<String, String>> menuItems;

public InteractiveArrayAdapter(Context context, int resource,
        ArrayList<HashMap<String, String>> menuItems) {
    super(context, resource, menuItems);
    this.menuItems = menuItems;
    inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    checkBoxState = new boolean[menuItems.size()];
}

private class ViewHolder {
    // ImageView photo;
    TextView title, link, published, description;
    // ImageButton newsCheck;
    public ImageView newsCheck;
}

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

    if (convertView == null) {
        // inflater =
        // LayoutInflater.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.list_item1, null);
        viewholder = new ViewHolder();

        // cache the views
        // viewholder.photo=(ImageView)
        // convertView.findViewById(R.id.photo);
        viewholder.title = (TextView) convertView
                .findViewById(R.id.news_title);
        // viewholder.link = (TextView) convertView.findViewById(R.id.link);
        viewholder.published = (TextView) convertView
                .findViewById(R.id.published);
        viewholder.description = (TextView) convertView
                .findViewById(R.id.description);
        viewholder.newsCheck = (ImageView) convertView
                .findViewById(R.id.newsCheck);
        System.out.println("position" + position);

        // link the cached views to the convertview
        convertView.setTag(viewholder);

    } else
        viewholder = (ViewHolder) convertView.getTag();

    HashMap<String, String> catalog_list = new HashMap<String, String>();
    catalog_list = menuItems.get(position);

    // viewholder.link.setText(catalog_list.get("NEWS_KEY_LINK")
    //
    // viewholder.link.setText(catalog_list
    // .get(NewsXMLParsingActivity.NEWS_KEY_LINK));
    viewholder.title.setText(catalog_list
            .get(NewsXMLParsingActivity.NEWS_KEY_TITLE));
    viewholder.published.setText(catalog_list
            .get(NewsXMLParsingActivity.NEWS_KEY_PUB));
    viewholder.description.setText(catalog_list
            .get(NewsXMLParsingActivity.NEWS_KEY_DESCRIPTION));
    viewholder.newsCheck.setTag(position);
    viewholder.newsCheck.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            viewholder.newsCheck.getTag(position);
            System.out.println(v.getTag() + "qqqqqq");
            int position = (Integer) v.getTag(); // This will retrieve your
                                                    // clicked image

            viewholder.newsCheck.setImageResource(R.drawable.favv2);

        }
    });

    return convertView;

}

}

回答1:

Try this...

public class InteractiveArrayAdapter extends
        ArrayAdapter<HashMap<String, String>> {
    public boolean[] checkBoxState;
    boolean[] favStar;
    // private Object inflater;
    private LayoutInflater inflater;
    private ArrayList<HashMap<String, String>> menuItems;
    // track the positions of images changed;
    private final HashSet<Integer> imageIndexes;

    public InteractiveArrayAdapter(Context context, int resource,
            ArrayList<HashMap<String, String>> menuItems) {
        super(context, resource, menuItems);
        this.menuItems = menuItems;
        inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        checkBoxState = new boolean[menuItems.size()];
        imageIndexes = new HashSet<Integer>();
    }

    private static class ViewHolder {
        // ImageView photo;
        TextView title, link, published, description;
        // ImageButton newsCheck;
        public ImageView newsCheck;
    }

    @Override
    public View getView(final int position, View convertView,
            ViewGroup parent) {
        ViewHolder viewholder = null;
        if (convertView == null) {
            // inflater =
            // LayoutInflater.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.list_item1, null);
            viewholder = new ViewHolder();

            // cache the views
            // viewholder.photo=(ImageView)
            // convertView.findViewById(R.id.photo);
            viewholder.title = (TextView) convertView
                    .findViewById(R.id.news_title);
            // viewholder.link = (TextView)
            // convertView.findViewById(R.id.link);
            viewholder.published = (TextView) convertView
                    .findViewById(R.id.published);
            viewholder.description = (TextView) convertView
                    .findViewById(R.id.description);
            viewholder.newsCheck = (ImageView) convertView
                    .findViewById(R.id.newsCheck);
            System.out.println("position" + position);

            // link the cached views to the convertview
            convertView.setTag(viewholder);

        } else {
            viewholder = (ViewHolder) convertView.getTag();
        }

        HashMap<String, String> catalog_list = new HashMap<String, String>();
        catalog_list = menuItems.get(position);

        // viewholder.link.setText(catalog_list.get("NEWS_KEY_LINK")
        //
        // viewholder.link.setText(catalog_list
        // .get(NewsXMLParsingActivity.NEWS_KEY_LINK));
        viewholder.title.setText(catalog_list
                .get(NewsXMLParsingActivity.NEWS_KEY_TITLE));
        viewholder.published.setText(catalog_list
                .get(NewsXMLParsingActivity.NEWS_KEY_PUB));
        viewholder.description.setText(catalog_list
                .get(NewsXMLParsingActivity.NEWS_KEY_DESCRIPTION));
        viewholder.newsCheck.setTag(position);
        if(imageIndexes.contains(Integer.valueOf(position))) {
            viewholder.newsCheck.setImageResource(R.drawable.favv2);
        } else {
            viewholder.newsCheck.setImageResource(R.drawable.favv1);
        }
        viewholder.newsCheck.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                int position = (Integer) v.getTag(); 
                ImageView imageView = (ImageView) v;
                imageView.setImageResource(R.drawable.favv2);
                imageIndexes.add(Integer.valueOf(position));
            }
        });

        return convertView;

    }
}

回答2:

When you click on the ImageView, the View v parameter will be the ImageView itself. So, if all you need to do is change the Image, you merely need to cast this as an ImageView, and change its Image Resource.

@Override
public void onClick(View v)
{
    ((ImageView) v).setImageResource(R.drawable.favv2);
}

来源：https://stackoverflow.com/questions/22317700/in-listview-adapter-replace-image-on-click-of-that-image