Android下拉颜色选择器

Question

我想创建一个下拉颜色选择器,像这样(抱歉丑陋的图像):

我只需要一些颜色(让我们说6)所以我不需要一个完整的颜色选择器,下拉列表将正常工作.

我知道我必须为Spinner扩展数组适配器并覆盖getDropDownView和getView.

我不知道的是如何创建一个带边框和纯色背景的方框.

我知道我可以在drawable中定义自己的形状.无论如何,我必须在运行时设置背景颜色,所以我还需要更改视图并设置正确的背景颜色.

这是最好的方法吗？谢谢.

Answer 1

如果您只想要背景颜色,可以像这个例子一样使用.

public class CustomSpinnerAdapter<T extends BaseEntity> extends ArrayAdapter implements SpinnerAdapter {    

    private final List<T> objects; // android.graphics.Color list

    public CustomSpinnerAdapter(Context context, List<T> objects) {
        super(context, R.layout.yourLayout, objects);
        this.context = context;
        this.objects = objects;

    }

    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        super.getDropDownView(position, convertView, parent);

        View rowView = convertView;


        if (rowView == null) {
            // Get a new instance of the row layout view
            LayoutInflater inflater = this.activity.getLayoutInflater();
            rowView = inflater.inflate(R.layout.yourLayout, null);

            rowView.setBackgroundColor(objects.get(position));

        } else {
            rowView.setBackgroundColor(objects.get(position));
        }


        return rowView;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View rowView = convertView;


        if (rowView == null) {
            // Get a new instance of the row layout view
            LayoutInflater inflater = this.activity.getLayoutInflater();
            rowView = inflater.inflate(R.layout.yourLayout, null);

            rowView.setBackgroundColor(objects.get(position));

        } else {
            rowView.setBackgroundColor(objects.get(position));
        }


        return rowView;
    }
}