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README
Apache-2.0

DelegateAdapter

An advanced RecyclerView's Adapter

## How to use.
  • compile 'com.github.boybeak:adapter:1.0'

AnnotationDelegate的使用方法

一般来说,使用DelegateAdapter配合AnnotationDelegate就可以满足大部分需求。

@DelegateInfo(layoutID = R.layout.layout_user, holderClass = UserHolder.class)
public class UserDelegate extends AnnotationDelegate<User> {
    public UserDelegate(User user) {
        super(user);
    }
}

注意注解@DelegateInfo,指定了其使用的布局layout id与对应的ViewHolder的class. 由于在library project中使用常量的限制,在library project中不能这样使用。可以使用另外一种方式。

public class UserDelegate extends AnnotationDelegate<User> {
    @LayoutID
    public int layoutId = R.layout.layout_user;
    @HolderClass
    public Class<? extends AbsViewHolder> holderClass = UserHolder.class;
    public UserDelegate(User user) {
        super(user);
    }
}

注意其中变量的注解@LayoutID, @HolderClass.

DelegateAdapter的使用方法

DelegateAdapter adapter = new DelegateAdapter(context);

添加数据

User user = new User(R.drawable.img1, "Jack", "Jack slow f**k");
adapter.add (new UserDelegate(user));
adapter.notifyDataSetChanged();

如果DelegateAdapter只与AnnotationDelegate配合使用,以上使用方法就可以满足; 如果还配合非AnnotationDelegate的AbsDelegate使用,则DelegateAdapter必须重写onHolderClassNotFound方法,并删除super.onHolderNotFound. 并提供对应的AbsViewHolder.

不使用注解,可以直接使用AbsDelegate

在AnnotationDelegate中,使用了反射来获取注解中的值,所以性能会稍微受到影响,如果想提高效率,可以直接继承AbsDelegate,在抽象方法getLayout与getHolderClass中去提供对应的布局与holder类。 当然,对于继承自AbsDelegate的类中,也可以使用注解,只是未对注解中对值做缓存,可能造成多次反射的问题。

使用LayoutImpl

如果你不想使用AbsDelegate,也可以使用LayoutImpl,例如:

public class User implements LayoutImpl {
    public int getLayout () {
        return R.layout.layout_user;
    }
}

建议使用继承AnnotationDelegate的方法来做,在AnnotationDelegate中以及做了缓存layout与holderClass,不需要多次反射获取

其他使用方法

之所以提倡使用Delegate的方式是为了避免污染原数据,例如界面列表的选中状态就不该存储与数据Model中。 如果你不介意数据污染,可以让原数据类实现LayoutImpl接口,同样要给出DelegateInfo活着是LayoutID,HolderClass注解

其他便捷方法

DelegateAdapter中封装了一些便利方法,例如: addIfNotExist,addAll,addAllAtFirst, addAllAtLast, getDataSourceArrayList, getSubList, firstIndexOf, replaceWith等。

联系我

也许我只是重复造了个轮子,期待一起改善。 新浪微博:没洗干净的葱 QQ:915522070

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