我正在尝试开发通用数组适配器类,我希望从该类继承奇数和偶数行的行颜色属性。我的通用适配器类是
public class SpecialAdapter<T> extends ArrayAdapter<T> {
private int[] colors = new int[] { 0x30FF0000, 0x300000FF };
public SpecialAdapter(Context context, int resource, List<T> items) {
super(context, resource,items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
int colorPos = position % colors.length;
view.setBackgroundColor(colors[colorPos]);
return view;
}
}
而且我想将其扩展到我的Adapter类以更改行颜色。
公共类MyArrayAdapter扩展了SpecialAdapter {..}
可能吗?当前它不显示任何颜色。我没有在Adapter类中设置任何颜色。我需要的是从基类继承行颜色,以便可以将其用于其他适配器类。
这是我的适配器类
public MyArrayAdapter(Activity context, List<MyObject> list) {
super(context, R.layout.mylayout, list);
this.context = context;
this.list = list;
}
public View getView(int position, View convertView, ViewGroup parent) {
View view = null;
if (convertView == null) {
LayoutInflater inflator = context.getLayoutInflater();
view = inflator.inflate(R.layout.mylayout, null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.txtName = (TextView) view.findViewById(R.id.label);
view.setTag(viewHolder);
} else {
view = convertView;
((ViewHolder) view.getTag()).txtName.setTag(list.get(position));
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.txtName.setText("Position " + position);
return view;
}
最佳答案
据我所知,没有这种通用方法。如果只有2种颜色,则可以使用以下内容。
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
if (position % 2 == 1) {
view.setBackgroundColor(Color.BLUE); // you can add any color here
} else {
view.setBackgroundColor(Color.CYAN); // don't like cyan? add another color.
}
return view;
}