Question

我正在使用ListView来显示播放列表，我使用可点击的ImageView来停止/恢复播放，目前我正在编写自定义适配器。问题：当我单击ImageView时，虽然检测到单击事件，但没有任何反应，因为我可以在LogCat输出中看到。怎么了？适配器代码

       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

使用setImageRessource()代替setBackgroundResource()来解决问题无法解释但现在可以正常使用

Answer 2

您可以使用adaptername.notifyDatasetchanged方法刷新列表。但不幸的是，这也将无法工作，因为当点击事件将被触发时，列表无法知道单击了哪个视图。要么你可以尝试使用项目点击监听器，它将为你提供点击项目的位置

android - 在ListView中处理项目点击

2 个答案: