Subclassing SimpleCursorAdapter to include convertView for memory conservation

Question

I\'ve been scouring throug the examples and tutorials but I can\'t seem to get my head around how to handle recycling within a subclassed SimpleCursorAdapter. I know that f

Answer 1

You could also subclass ResourceCursorAdapter. In that case you only need to override the bindview method:

public class MySimpleCursorAdapter extends ResourceCursorAdapter {

public MySimpleCursorAdapter(Context context, Cursor c) {
    super(context, R.layout.myLayout, c);
}

@Override
public void bindView(View view, Context context, Cursor cursor) {
    ViewHolder viewHolder = (ViewHolder) view.getTag();
    if (viewHolder == null) {
        viewHolder = new ViewHolder(view);
        view.setTag(viewHolder);
    }
    viewHolder.bind(cursor, context);
}

/**
 * A ViewHolder keeps references to children views to avoid unnecessary calls
 * to findViewById() on each row (especially during scrolling)
 */
private static class ViewHolder {
    private TextView text;

    private ToggleButton toggle;

    public ViewHolder(View view) {
        text = (TextView) view.findViewById(R.id.rowText);
        toggle = (ToggleButton) view.findViewById(R.id.rowToggleButton);
    }

    /**
     * Bind the data from the cursor to the proper views that are hold in
     * this holder
     * @param cursor
     */
    public void bind(Cursor cursor, Context context) {
        toggle.setChecked(0 != cursor.getInt(cursor.getColumnIndex("ENABLED")));
        text.setText(cursor.getString(cursor.getColumnIndex("TEXT")));
    }
}

}