如何在ListView Android中获取位置imageView

Question

I have a list with pictures for each item, when I click on an image I need the position of the list.

how can I get this?

I tried to do View.getTag().ToString() but by mistake.

Here's the code:

ImageView im = (ImageView) convertView.findViewById(R.id.imageViewDSD);

im.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {
        try {
            Toast.makeText(contextCustom,
                    "ImageView clicked for the row = " + v.getTag(),
                    Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
            Log.i("Error", "errore vista " + e);
        }

    }

});

Answer 1

  listView.setOnItemClickListener(new OnItemClickListener()
    {
        @Override
        public void onItemClick(AdapterView<?> parent, View view,int position, long id) 
        {
            postion on your image
            Toast.makeText(getApplicationContext(), ""+position, Toast.LENGTH_LONG).show();
        }
    });

Answer 2

On each getView, set the ImageView's tag to be equal to the list item's position.

Then in your listener you can get the tag, and determine which list item this image belongs to.

ImageView im = (ImageView) convertView.findViewById(R.id.imageViewDSD);
im.setTag(position);

Also note that you shouldn't create a new listener every time getView is called, instead do it only when convertView is null. However the tag should always be set regardless of convertView's value.

Edit:

Here's a full example of neat getView method (using a holder pattern to avoid findViewById ):

private static class ViewHolder {
    ImageView imgView;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // (Re)Use the convertView
    ViewHolder holder;
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.list_item, parent, false);
        holder = new ViewHolder();
        holder.imgView = (ImageView) convertView.findViewById(R.id.imageViewDSD);
        holder.imgView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(contextCustom, "Pos: " + v.getTag(),
                        Toast.LENGTH_SHORT).show();
            }
        });
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.imgView.setTag(position);

    // Do something else with your image here

    return convertView;
}