android-处理ListView中的项目单击

Question

I'm using a ListView to display a Playlist and I use a clickable ImageView to stop/resume playback, currently I'm writing a custom adapter. The problem: when I click the ImageView , nothing happens though click events are detected as I can see in the LogCat output. What am doing wrong? Adapter code below

       public class AudioListAdapter extends ArrayAdapter<Playlist> {

Context context;
int layoutResourceId;
Playlist data[] = null;


public AudioListAdapter(Context context, int layoutResourceId,
        Playlist[] data) {
    super(context, layoutResourceId, data);
    this.layoutResourceId = layoutResourceId;
    this.context = context;
    this.data = data;

}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View row = convertView;
    PlaylistHolder holder = null;

    if (row == null) {
        LayoutInflater inflater = ((Activity) context).getLayoutInflater();
        row = inflater.inflate(layoutResourceId, parent, false);

        holder = new PlaylistHolder();
        PlaylistHolder.imgBtnPlay = (ImageView) row
                .findViewById(R.id.imgListBtnPlay);
        holder.txtTitle = (TextView) row.findViewById(R.id.tvListItemSong);
        holder.txtArtist = (TextView) row
                .findViewById(R.id.tvListItemArtist);

        Playlist playlist = data[position];
        holder.txtTitle.setText(playlist.Title);
        holder.txtArtist.setText(playlist.Artist);
        PlaylistHolder.imgBtnPlay.setImageResource(playlist.btn);
        PlaylistHolder.imgBtnPlay
                .setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        PlaylistHolder.imgBtnPlay
                                .setBackgroundResource(R.drawable.list_button_pause);
                        Log.e("onClick", "image clicked"); //Click events are detected

                    }
                });

        row.setTag(holder);
    } else {
        holder = (PlaylistHolder) row.getTag();
    }

    return row;
}

static class PlaylistHolder {
    static ImageView imgBtnPlay;
    TextView txtTitle, txtArtist;
}

  }

Answer 1

通过使用setImageRessource()而不是setBackgroundResource()解决了问题，无法解释，但现在可以使用

Answer 2

You can refresh the list using the adaptername.notifyDatasetchanged method..But unfortunatly that will also not work because when click event will be fired list cant get to know which view is clicked. either you can try using item click listener which will provide you the position of clicked item