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修改AdapterDelegates开源项目
开源项目地址:https://github.com/sockeqwe/AdapterDelegates
发现该开源项目扩展性似乎有点差,里面没有可以扩展的接口。有点搞不下去了。于是有了重构的想法了,这种想法是不是太邪恶了?
该项目的设计原理是,每种类型的视图对应一种代理,对adapter起到很好的解耦效果。不管是代码管理还是视图结构都清晰明了。该项目精简,几个类就解决问题,如果只有简单的需要没必要引入复杂的adapter封装包。
所做修改
- 提取抽象类IDelegate、IDelegateManager,使得项目扩展性更好。
- 遵守开闭原则,新增了IbbListDelegateAdapter类,用于添加itemClick itemLongClick事件。
Dependencies
This library is available on maven central:
compile 'com.ibbhub.android:adapterdelegate:1.0.0'
使用说明
viewType ==1的情况
当视图的类型只有一种的时候,我们的adapter需要继承IbbListDelegateAdapter,该类传入一个List
public class ReptilesAdapter extends IbbListDelegateAdapter<List<DisplayableItem>> {
public ReptilesAdapter(List<DisplayableItem> items) {
// Delegates
this.delegatesManager.setFallbackDelegate(new ReptilesFallbackDelegate());
setItems(items);
}
}
AbsFallbackAdapterDelegate:该代理为默认代理,避免用户设置视图类型的时候出现没有代理对应的情况。如果只有一种视图类型,建议使用该代理,因为该代理默认添加了视图的点击和长按事件。
public class ReptilesFallbackDelegate extends AbsFallbackAdapterDelegate<List<DisplayableItem>> {
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent) {
View view = inflater.inflate(R.layout.item_unknown_reptile, parent, false);
return new ReptileFallbackViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull List<DisplayableItem> items, int position, @NonNull RecyclerView.ViewHolder holder, @NonNull List<Object> payloads) {
super.onBindViewHolder(items, position, holder, payloads);
}
class ReptileFallbackViewHolder extends RecyclerView.ViewHolder {
public ReptileFallbackViewHolder(View itemView) {
super(itemView);
}
}
}
设置itemClick:如果想设置item的点击事件和长按事件,设置监听事件即可。
//remember,The adapter must extends AbsFallbackAdapterDelegate and @Override
//public void onBindViewHolder()
adapter.setListener(new AdapterListener<List<DisplayableItem>>() {
@Override
public void onClick(List<DisplayableItem> displayableItems, int pos) {
Toast.makeText(ReptilesActivity.this, "click-->pos:"+pos, Toast.LENGTH_SHORT).show();
}
@Override
public void onLongClick(List<DisplayableItem> displayableItems, int pos) {
Toast.makeText(ReptilesActivity.this, "long click-->pos:"+pos, Toast.LENGTH_SHORT).show();
}
});
2.viewType >1的情况
ListDelegationAdapter :如果视图类型为多种,则需要继承ListDelegationAdapter,利用delegatesManager添加多种代理。在Delegate当中设置是否为显示的类型,如果该类型没有代理对应,则显示默认代理的视图。
public class AnimalAdapter extends ListDelegationAdapter<List<Animal>> {
public AnimalAdapter(Activity activity, List<Animal> items) {
// DelegatesManager is a protected Field in ListDelegationAdapter
delegatesManager.addDelegate(new CatAdapterDelegate(activity))
.addDelegate(new DogAdapterDelegate(activity))
.addDelegate(new GeckoAdapterDelegate(activity))
.addDelegate(23, new SnakeAdapterDelegate(activity));
// Set the items from super class.
setItems(items);
}
}
AdapterDelegate :如果视图的类型为多种,则继承该类。
public class CatAdapterDelegate extends AdapterDelegate<List<Animal>> {
private LayoutInflater inflater;
public CatAdapterDelegate(Activity activity) {
inflater = activity.getLayoutInflater();
}
@Override public boolean isForViewType(@NonNull List<Animal> items, int position) {
return items.get(position) instanceof Cat;
}
@NonNull @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent) {
return new CatViewHolder(inflater.inflate(R.layout.item_cat, parent, false));
}
@Override public void onBindViewHolder(@NonNull List<Animal> items, int position,
@NonNull RecyclerView.ViewHolder holder, @Nullable List<Object> payloads) {
CatViewHolder vh = (CatViewHolder) holder;
Cat cat = (Cat) items.get(position);
vh.name.setText(cat.getName());
}
static class CatViewHolder extends RecyclerView.ViewHolder {
public TextView name;
public CatViewHolder(View itemView) {
super(itemView);
name = (TextView) itemView.findViewById(R.id.name);
}
}
}