第一步:在fragment对应的布局xml文件中使用recyclerview
简单解释:此处布局根据具体业务进行属性设置,我需要recyclerview充满整个fragment
需要注意的是recyclerview是v7包中的组件,需要提前导入v7包,有的可能在使用的时候不会出现提醒,但是我使用的导入v7包的Android studio是有提示的!
第二步:在fragment中定义使用
public class CollectFragment extends Fragment {
private View view;//定义view用来设置fragment的layout
public RecyclerView mCollectRecyclerView;//定义RecyclerView
//定义以goodsentity实体类为对象的数据集合
private ArrayList goodsEntityList = new ArrayList();
//自定义recyclerveiw的适配器
private CollectRecycleAdapter mCollectRecyclerAdapter;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
//获取fragment的layout
view = inflater.inflate(R.layout.collect_page, container, false);
//对recycleview进行配置
initRecyclerView();
//模拟数据
initData();
return view;
}
/**
* TODO 模拟数据
*/
private void initData() {
for (int i=0;i<10;i++){
GoodsEntity goodsEntity=new GoodsEntity();
goodsEntity.setGoodsName("模拟数据"+i);
goodsEntity.setGoodsPrice("100"+i);
goodsEntityList.add(goodsEntity);
}
}
/**
* TODO 对recycleview进行配置
*/
private void initRecyclerView() {
//获取RecyclerView
mCollectRecyclerView=(RecyclerView)view.findViewById(R.id.collect_recyclerView);
//创建adapter
mCollectRecyclerAdapter = new CollectRecycleAdapter(getActivity(), goodsEntityList);
//给RecyclerView设置adapter
mCollectRecyclerView.setAdapter(mCollectRecyclerAdapter);
//设置layoutManager,可以设置显示效果,是线性布局、grid布局,还是瀑布流布局
//参数是:上下文、列表方向(横向还是纵向)、是否倒叙
mCollectRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));
//设置item的分割线
mCollectRecyclerView.addItemDecoration(new DividerItemDecoration(getActivity(),DividerItemDecoration.VERTICAL));
//RecyclerView中没有item的监听事件,需要自己在适配器中写一个监听事件的接口。参数根据自定义
mCollectRecyclerAdapter.setOnItemClickListener(new CollectRecycleAdapter.OnItemClickListener() {
@Override
public void OnItemClick(View view, GoodsEntity data) {
//此处进行监听事件的业务处理
Toast.makeText(getActivity(),"我是item",Toast.LENGTH_SHORT).show();
}
});
}
}
第三步设置RecyclerView的适配器
public class CollectRecycleAdapter extends RecyclerView.Adapter {
private Context context;
private ArrayList goodsEntityList;
//创建构造函数
public CollectRecycleAdapter(Context context, ArrayList goodsEntityList) {
//将传递过来的数据,赋值给本地变量
this.context = context;//上下文
this.goodsEntityList = goodsEntityList;//实体类数据ArrayList
}
/**
* 创建viewhodler,相当于listview中getview中的创建view和viewhodler
*
* @param parent
* @param viewType
* @return
*/
@Override
public myViewHodler onCreateViewHolder(ViewGroup parent, int viewType) {
//创建自定义布局
View itemView = View.inflate(context, R.layout.item_layout, null);
return new myViewHodler(itemView);
}
/**
* 绑定数据,数据与view绑定
*
* @param holder
* @param position
*/
@Override
public void onBindViewHolder(myViewHodler holder, int position) {
//根据点击位置绑定数据
GoodsEntity data = goodsEntityList.get(position);
// holder.mItemGoodsImg;
holder.mItemGoodsName.setText(data.goodsName);//获取实体类中的name字段并设置
holder.mItemGoodsPrice.setText(data.goodsPrice);//获取实体类中的price字段并设置
}
/**
* 得到总条数
*
* @return
*/
@Override
public int getItemCount() {
return goodsEntityList.size();
}
//自定义viewhodler
class myViewHodler extends RecyclerView.ViewHolder {
private ImageView mItemGoodsImg;
private TextView mItemGoodsName;
private TextView mItemGoodsPrice;
public myViewHodler(View itemView) {
super(itemView);
mItemGoodsImg = (ImageView) itemView.findViewById(R.id.item_goods_img);
mItemGoodsName = (TextView) itemView.findViewById(R.id.item_goods_name);
mItemGoodsPrice = (TextView) itemView.findViewById(R.id.item_goods_price);
//点击事件放在adapter中使用,也可以写个接口在activity中调用
//方法一:在adapter中设置点击事件
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//可以选择直接在本位置直接写业务处理
//Toast.makeText(context,"点击了xxx",Toast.LENGTH_SHORT).show();
//此处回传点击监听事件
if(onItemClickListener!=null){
onItemClickListener.OnItemClick(v, goodsEntityList.get(getLayoutPosition()));
}
}
});
}
}
/**
* 设置item的监听事件的接口
*/
public interface OnItemClickListener {
/**
* 接口中的点击每一项的实现方法,参数自己定义
*
* @param view 点击的item的视图
* @param data 点击的item的数据
*/
public void OnItemClick(View view, GoodsEntity data);
}
//需要外部访问,所以需要设置set方法,方便调用
private OnItemClickListener onItemClickListener;
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
}
自定义实体类简单展示:
public class GoodsEntity implements Serializable {
public String imgPath;//图片地址
public String goodsName;//货物名称
public String goodsPrice;//货物价格
public GoodsEntity() {
}
public GoodsEntity(String imgPath, String goodsName, String goodsPrice) {
this.imgPath = imgPath;
this.goodsName = goodsName;
this.goodsPrice = goodsPrice;
}
public String getImgPath() {
return imgPath;
}
public void setImgPath(String imgPath) {
this.imgPath = imgPath;
}
public String getGoodsName() {
return goodsName;
}
public void setGoodsName(String goodsName) {
this.goodsName = goodsName;
}
public String getGoodsPrice() {
return goodsPrice;
}
public void setGoodsPrice(String goodsPrice) {
this.goodsPrice = goodsPrice;
}
@Override
public String toString() {
return "GoodsEntity{" +
"imgPath='" + imgPath + '\'' +
", goodsName='" + goodsName + '\'' +
", goodsPrice='" + goodsPrice + '\'' +
'}';
}
}
显示效果展示:
相关fragment xml adapter entity文件下载
演示效果gif截屏工具