课堂笔记

• 给 HomePagerFragment 布局添加 RecyclerView

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical">
    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/home_pager_content_list" />
</LinearLayout>

• 给 RecyclerView mContentList 设置布局管理器和适配器

    @Override
    protected void initView() {
        mContentList.setLayoutManager(new LinearLayoutManager(getContext()));
        mHomePagerContentAdapter = new HomePagerContentAdapter();
        mContentList.setAdapter(mHomePagerContentAdapter);
    }

• 创建 HomePagerContentAdapter

public class HomePagerContentAdapter extends RecyclerView.Adapter<HomePagerContentAdapter.InnerHolder> {
    @NonNull
    @Override
    public InnerHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        return null;
    }
    @Override
    public void onBindViewHolder(@NonNull InnerHolder holder, int position) {
    }
    @Override
    public int getItemCount() {
        return 0;
    }
    public class InnerHolder extends RecyclerView.ViewHolder {
        public InnerHolder(@NonNull View itemView) {
            super(itemView);
        }
    }
}

• 把分类页面数据给 HomePagerContentAdapter

    @Override
    public void onContentLoaded(List<HomePagerContent.DataBean> contents) {
        mHomePagerContentAdapter.setData(contents);
        setUpState(State.SUCCESS);
    }

• HomePagerContentAdapter 创建集合保存数据

    private List<HomePagerContent.DataBean> mData = new ArrayList<>();
    public void setData(List<HomePagerContent.DataBean> contents) {
        mData.clear();
        mData.addAll(contents);
        notifyDataSetChanged();
    }

• 创建 itemView 布局 item_home_pager_content （和老师的有些出入）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="center_vertical">
    <ImageView
        android:id="@+id/goods_cover"
        android:layout_width="85dp"
        android:layout_height="85dp"
        android:scaleType="fitCenter"
        android:src="@mipmap/ic_launcher" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:layout_marginEnd="10dp"
        android:orientation="vertical">
        <TextView
            android:id="@+id/goods_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:textStyle="bold"
            android:text="看见拉开距离阿斯利康就按当时看了就啊撒旦立刻解十点十分放埃里克森"
            android:textSize="12sp" />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/shape_tag_bg"
            android:id="@+id/tv_saved_prise"
            android:padding="2dp"
            android:text="省15元"
            android:textColor="@color/white"
            android:textSize="12dp" />
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="6dp"
            android:orientation="horizontal">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="券后价："
                android:textColor="@color/colorPrimary" />
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="19.9"
                android:id="@+id/tv_final_prise"
                android:textColor="@color/colorPrimary" />
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="￥23"
                android:id="@+id/tv_original_prise"
                android:textSize="10dp"
                android:layout_marginStart="10dp"
                android:textColor="@color/colorGray" />
            <TextView
                android:layout_marginStart="10dp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="1000人已经购买"
                android:id="@+id/tv_sell_count"
                android:textColor="@color/colorGray" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

• 观看视频