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Android

J A
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J A
Full Stack JavaScript Techdegree Student 4,646 Points
Posted by J A
.a{fill-rule:evenodd;}techdegree
J A
Full Stack JavaScript Techdegree Student 4,646 Points

On subsequent calls to DayAdapter.getView(), what happens to the ViewHolder?

After the first call to DayAdapter.getView(), the convertView object will not be null so that it can be recycled for efficiency (please correct me if I'm wrong). In that case, execution goes down the else block of the if-else condition. In the else block, the holder is initialized and nothing else. After that the holder has a few of its properties updated with values and then it is not used anymore and goes out of scope. Why is that?

public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = LayoutInflater.from(mContext).inflate(R.layout.daily_list_item, null);

            holder = new ViewHolder();
            holder.iconImageView = (ImageView) convertView.findViewById(R.id.iconImageView);
            holder.temperatureLabel = (TextView) convertView.findViewById(R.id.temperatureLabel);
            holder.dayLabel = (TextView) convertView.findViewById(R.id.dayNameLabel);
            holder.circleImageView = (ImageView) convertView.findViewById(R.id.circleImageView);

            convertView.setTag(holder);

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

        Day day = mDays[position];
        holder.iconImageView.setImageResource(day.getIconId());
        holder.temperatureLabel.setText("" + day.getTemperatureMax());
        holder.circleImageView.setImageResource(R.drawable.bg_temperature);

        return convertView;
    }