泛型实例化

public class TagGroup<T extends TagGroup.TagAble> extends ViewGroup {

    public interface TagAble extends Parcelable {
        public String id();
        public String name();
    }

    private Class<T> clazz;

    public void setClazz(Class<T> clazz) {
        this.clazz = clazz;
    }

    private T getInstanceOfT()
            throws InstantiationException, IllegalAccessException {
        return clazz.newInstance();
    }

    @SuppressWarnings("unchecked")
    private T[] getArrayInstanceOfT(int s) {
        return (T[]) Array.newInstance(clazz, s);
    }