使用BaseRecyclerViewAdapterHelper实现多布局view
前言: 在开发过程中我们会碰到一个大接口返回了多种数据类型的list, 这时候我们首先想到的时使用一个recycleview, 如果是使用addHeader方式进行添加一个新的list, item并不能得到复用, recycleview的性能并没有得到很好的利用, 使用BaseRecyclerViewAdapterHelper, adapter继承BaseMultiItemQuickAdapter,根据不同的type类型, 添加不同的样式的view.
以下为我们现在项目中某个接口返回的内容:
{"series":
[
{
"id":"2", // 车系id
"name":"东风标致308", // 车系名
}
],
"preSale": // 预售
[
{
"id":"33",
"autoName": "奇瑞 艾瑞泽3 2015款 1.5L 自动够炫版",
"prePrice": "7.79", // 预售价
}
]}
分析: 这个接口中返回的是两个List, 但是数据结构完全不同, 需要在同一个页面展示, 我们需要使用一个recycleview是性能达到最大优化的展示.
- 首先要集成
[BRVAH]参考资料链接: (https://link.jianshu.com/?t=https://github.com/CymChad/BaseRecyclerViewAdapterHelper) - 然后我们需要创建一个实体类, 实现接口
MultiItemEntity, 定义两种itemType,并且添加两个集合的bean对象
public class HomeEntity implements MultiItemEntity {
public static final int TYPE_SERIES = 1;
public static final int TYPE_PESALE = 2;
private int itemType;
public SeriesEntity seriesEntity;
public PresaleEntity presaleEntity;
public SeriesEntity getSeriesEntity() {
return seriesEntity;
}
public void setSeriesEntity(SeriesEntity seriesEntity) {
this.seriesEntity = seriesEntity;
}
public PresaleEntity getPresaleEntity() {
return presaleEntity;
}
public void setPresaleEntity(PresaleEntity presaleEntity) {
this.presaleEntity = presaleEntity;
}
@Override
public int getItemType() {
return this.itemType;
}
public class SeriesEntity {
private String id;
private String name;
public SeriesEntity(String id, String name) {
this.id = id;
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
.....
}
public class PresaleEntity {
public PresaleEntity(String id, String autoName, String prePrice) {
this.id = id;
this.autoName = autoName;
this.prePrice = prePrice;
}
private String id;
private String autoName;
private String prePrice;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
....
}
}
- 创建
adapter, 继承BaseMultiItemQuickAdapter, 需要在adapter的构造方法中, 添加type和对应的布局样式, 在convert方法中, 根据item的type类型对不同布局进行操作.
public class MultiAdapter extends BaseMultiItemQuickAdapter<MultiItemEntity, BaseViewHolder> {
public MultiAdapter(List<MultiItemEntity> data) {
super(data);
addItemType(HomeEntity.TYPE_PESALE, R.layout.layout_presale);
addItemType(HomeEntity.TYPE_SERIES, R.layout.layout_series);
}
@Override
protected void convert(BaseViewHolder helper, MultiItemEntity item) {
HomeEntity homeEntity = (HomeEntity) item;
switch (homeEntity.getItemType()) {
case HomeEntity.TYPE_PESALE:
HomeEntity.PresaleEntity entity = homeEntity.getPresaleEntity();
helper.setText(R.id.tv_brand_name, entity.getAutoName())
.setText(R.id.tv_lowest_price, entity.getPrePrice());
case HomeEntity.TYPE_SERIES:
HomeEntity.SeriesEntity seriesEntity = homeEntity.getSeriesEntity();
helper.setText(R.id.tv_name, seriesEntity.getName());
}
}
}
- 最后一步,只需要对adapter设置数据就好了~~
.....通过接口拿到数据实体类, homebean, 然后将homebean中的元素转化为homeEntity, 加到list集合中
List<HomeEntity> list = new ArrayList<>();
for (int i = 0; i < homeBean.getPreSale().size(); i++) {
HomeEntity.PresaleEntity preSaleBean = homeBean.getPreSale().get(i);
HomeEntity entity = new HomeEntity(HomeEntity.TYPE_PESALE);
entity.setPresaleEntity(preSaleBean);
list.add(entity);
}
for (int i = 0; i < homeBean.getSales().size(); i++) {
HomeEntity.SeriesEntity seriesEntity = homeBean.getSales().get(i);
HomeEntity entity = new HomeEntity(HomeEntity.TYPE_SERIES);
entity.setSeriesEntity(seriesEntity);
list.add(entity);
}
mAdapter.setNewData(list);
