Encapsulation RecyclerView, to create for the development of a very practical tool, add some commonly used in the development of function, such as drop-down refresh, paging, automatic loading, loading error, etc.More new functions will gradually add...
标签（空格分隔）： Android RecyclerView
- 下拉刷新,使用默认的下拉刷新控件
- 页面加载数据过程中显示LoadingView
- 页面加载数据出错时显示ErrorView
- 页面数据大小为0时显示EmptyView
- 自动加载,当页面到底部或者当前页面显示不全时,自动加载其余数据,并显示LoadMoreView
- 加载更多时出错自动停止加载更多,并显示LoadMoreFailedView
- 没有更多数据加载时,显示NoMoreView
- 支持Header View和Footer View
- 除下拉刷新以外,其余View均可自定义
- 支持多种Item类型
- 支持GridLayout和瀑布流
- 新增动态显示或关闭NoMoreView,LoadMoreView,LoadMoreFailedView功能
- 新增打开或关闭自动加载功能
- 新增手动触发加载demo
- 增加获取RecyclerView接口
public RecyclerView get() {
return mRecyclerView;
}- 增加拖拽功能与demo
- 向下支持到API 11(android 3.0)
- AbstractAdapter增加更多操作数据接口, 如:
public void clearData() {}
public void clearHeader() {}
public void clearFooter() {}
public void insert(){}
public void insertBack(){}
//等等- 增加ExpandItemList demo
- 新增添加单个数据接口 void add(T item);
- 修复需要滑动两次才能显示loadmore的bug.
1.添加Gradle依赖
dependencies{
compile 'zlc.season:practicalrecyclerview:1.1.5'
}2.在布局文件中添加PracticalRecyclerView
<zlc.season.practicalrecyclerview.PracticalRecyclerView
android:id="@+id/recycler"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:loading_layout="@layout/default_loading_layout" //可以自定义,也可以不设置使用默认的布局
app:empty_layout="@layout/default_empty_layout" //以下属性同样不设置即为使用默认的布局
app:error_layout="@layout/default_error_layout"
app:load_more_layout="@layout/default_load_more_layout"
app:no_more_layout="@layout/default_no_more_layout"
app:load_more_failed_layout="@layout/default_load_more_failed_layout"/>3.添加代码
首先定义一个POJO类, 并实现ItemType接口:
class NormalBean implements ItemType {
String mImg;
String mTitle;
String mContent;
NormalBean(String img, String title, String content) {
mImg = img;
mContent = content;
mTitle = title;
}
@Override
public int itemType() {
return 0;
}
}这里返回的item type 表示是item的类型, 如果列表只有一种类型的item, 那么返回0就可以了, 如果有多种item, 则对应类型的item返回对应类型的item type. 这里简单的返回0 .
接着定义ViewHolder, 继承自AbstractViewHolder, 并提供泛型参数:
class NormalViewHolder extends AbstractViewHolder<NormalBean> {
@BindView(R.id.head)
ImageView mHead;
@BindView(R.id.title)
TextView mTitle;
@BindView(R.id.content)
TextView mContent;
private Context mContext;
NormalViewHolder(ViewGroup parent) {
super(parent, R.layout.normal_item); //与对应的item layout进行绑定.
mContext = parent.getContext(); //如果viewholder需要context,在这里获取.
ButterKnife.bind(this, itemView); //这里使用了butterknife进行控件绑定,也可以手写 // itemView.findViewById()来获取对应的控件.
}
@Override
public void setData(NormalBean data) {
Picasso.with(mContext).load(Uri.parse(data.mImg)).into(mHead);
mTitle.setText(data.mTitle);
mContent.setText(data.mContent);
}
}在Viewholder中进行View的创建和绑定, 如果需要绑定按钮的单击事件或者其他的一些事件, 在此处进行再好不过了.
接下来创建Adatper, 继承自AbstractAdapter<T , VH>, 并提供泛型参数:
class SingleItemAdapter extends AbstractAdapter<NormalBean, NormalViewHolder> {
@Override
protected NormalViewHolder onNewCreateViewHolder(ViewGroup parent, int viewType) {
return new NormalViewHolder(parent);
}
@Override
protected void onNewBindViewHolder(NormalViewHolder holder, int position) {
holder.setData(get(position));
}
}adapter 类中非常简洁, 只需要在onNewCreateViewHolder()中创建ViewHolder, 在onNewBindViewHolder()中调用viewholder的setData()即可, 这样adapter和viewholder的逻辑就分离开来,互不干扰.
最后,在Activity或者Fragment中进行最后的配置:
PracticalRecyclerView mRecycler;
private SingleItemAdapter mAdapter = new SingleItemAdapter();
...
mRecycler.setLayoutManager(new LinearLayoutManager(this));
mRecycler.setAdapterWithLoading(mAdapter);
mRecycler.setRefreshListener(new PracticalRecyclerView.OnRefreshListener() {
@Override
public void onRefresh() {
mPresenter.loadData(true);
}
});
mRecycler.setLoadMoreListener(new PracticalRecyclerView.OnLoadMoreListener() {
@Override
public void onLoadMore() {
mPresenter.loadData(false);
}
});
...
//更多详细代码请下载demo查看4.添加Header 和 Footer
要添加Header和Footer, 可以选择实现SectionItem接口, 或者继承SectionItemImpl, 如下所示:
class Header implements SectionItem {
@BindView(R.id.banner_guide_content)
BGABanner mBanner;
@Override
public View createView(ViewGroup parent) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.header_item, parent, false);
ButterKnife.bind(this, view);
return view;
}
@Override
public void onBind() {
mBanner.setAdapter(new BGABanner.Adapter() {
@Override
public void fillBannerItem(BGABanner banner, View view, Object model, int position) {
((ImageView) view).setImageResource((int) model);
}
});
mBanner.setData(Arrays.asList(R.mipmap.a, R.mipmap.b, R.mipmap.c, R.mipmap.d, R.mipmap.e, R.mipmap.f,
R.mipmap.g, R.mipmap.h), null);
}
}这里使用了一个开源轮播库BGABanner当作Header, 该库的链接在此: BGAbanner
接着调用Adapter的addHeader() 或者addFooter()方法将该Header或Footer添加到adapter中:
mAdapter.addHeader(new Header());5.Configure 接口和ConfigureAdapter类
当默认的属性不能满足需求时, 可以自定义layout 并设置为PracticalRecyclerView的属性:
...
app:load_more_failed_layout="@layout/custom_load_more_failed_layout" //当加载更多失败时显示的View
...若需要对该View进行设置, 就需要用到Configure接口, Configure接口定义了以下方法,分别对属性中设置的View进行设置:
public interface Configure {
void configureEmptyView(View emptyView); //对Empty View 进行设置
void configureErrorView(View errorView); //对Error View 进行设置
void configureLoadingView(View loadingView); // 对LoadingView 进行设置
void configureLoadMoreView(View loadMoreView); // 对LoadMore View进行设置
void configureNoMoreView(View noMoreView); //对NoMore View进行设置
void configureLoadMoreErrorView(View loadMoreErrorView); // 对LoadMoreError View进行设置
}ConfigureAdapter是对Configure接口的一个包装类, 可以选择实现其中的某一些方法,从而设置对应的View:
mRecycler.configureView(new ConfigureAdapter() {
@Override
public void configureLoadMoreFailedView(View loadMoreFailedView) {
super.configureLoadMoreFailedView(loadMoreFailedView);
loadMoreFailedView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(SingleItemActivity.this, "点击LoadMoreFailedView时应该进行的操作", Toast.LENGTH_SHORT).show();
}
});
}
@Override
public void configureErrorView(View errorView) {
super.configureErrorView(errorView);
errorView.dosomething();
}
});6.更多功能将会继续开发和完善
若您对此项目有一些自己的想法 , 欢迎来提Pull Request.
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Copyright 2016 Season.Zlc Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.