商品查询与展示

最新推荐文章于 2022-07-14 23:19:40 发布

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最新推荐文章于 2022-07-14 23:19:40 发布

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本文链接：https://blog.youkuaiyun.com/Lay_y/article/details/78348758

本文介绍了一款购物应用的UI设计与数据展示实现方法，包括使用RecyclerView进行商品列表展示，通过不同视图类型交替显示商品信息，并实现了查找与切换布局的功能。

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public class ShoppingActivity extends BaseActivity implements View.OnClickListener {

    private List<ShoppingBean.DataBean> list = new ArrayList<>();
    private EditText et;
    private TextView change;
    private RecyclerView rv;
    private boolean flag;
    private TextView find;//布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.zengyuxin1508b1014.Activity.ShoppingActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="60dp">
        <EditText
            android:id="@+id/et"
            android:background="#ff3660"
            android:hint="输入搜索关键词"
            android:textColorHint="#fff"
            android:layout_gravity="center"
            android:layout_width="300dp"
            android:layout_height="50dp" />
        <TextView
            android:id="@+id/find"
            android:text="查找"
            android:textSize="20sp"
            android:paddingRight="60dp"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/change"
            android:text="切换"
            android:textSize="20sp"
            android:paddingRight="5dp"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </RelativeLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
</LinearLayout>

//适配器
public class MyAdapter extends RecyclerView.Adapter{

    private Context context;
    private List<ShoppingBean.DataBean> list;
    private static final int TYPE1 = 0;
    private static final int TYPE2 = 1;

    public MyAdapter(Context context, List<ShoppingBean.DataBean> list) {
        this.context = context;
        this.list = list;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        RecyclerView.ViewHolder holder = null;
        if(viewType == TYPE1){
            View view1 = LayoutInflater.from(context).inflate(R.layout.item1, parent, false);
            holder = new Type1ViewHolder(view1);
        }else{
            View view2 = LayoutInflater.from(context).inflate(R.layout.item2, parent, false);
            holder = new Type2ViewHolder(view2);
        }
        return holder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if(holder instanceof Type1ViewHolder){
            ShoppingBean.DataBean dataBean = list.get(position);
            Type1ViewHolder type1ViewHolder = (Type1ViewHolder) holder;
            type1ViewHolder.item1_price.setText(dataBean.getPrice()+"");
            type1ViewHolder.item1_title.setText(dataBean.getTitle());
            ImageLoader.getInstance().displayImage(dataBean.getImages(),type1ViewHolder.item1_iv);
        }else{
            ShoppingBean.DataBean dataBean = list.get(position);
            Type2ViewHolder type2ViewHolder = (Type2ViewHolder) holder;
            type2ViewHolder.item2_price.setText(dataBean.getPrice()+"");
            type2ViewHolder.item2_title.setText(dataBean.getTitle());
            ImageLoader.getInstance().displayImage(dataBean.getImages(),type2ViewHolder.item2_iv);
        }
    }

    @Override
    public int getItemViewType(int position) {
        return position % 2 == 0? TYPE1 : TYPE2;
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    private class Type1ViewHolder extends RecyclerView.ViewHolder{

        private final ImageView item1_iv;
        private final TextView item1_title;
        private final TextView item1_price;

        public Type1ViewHolder(View itemView) {
            super(itemView);
            item1_iv = itemView.findViewById(R.id.item1_iv);
            item1_title = itemView.findViewById(R.id.item1_title);
            item1_price = itemView.findViewById(R.id.item1_price);
        }
    }

    private class Type2ViewHolder extends RecyclerView.ViewHolder{

        private final ImageView item2_iv;
        private final TextView item2_title;
        private final TextView item2_price;

        public Type2ViewHolder(View itemView) {
            super(itemView);
            item2_iv = itemView.findViewById(R.id.item2_iv);
            item2_title = itemView.findViewById(R.id.item2_title);
            item2_price = itemView.findViewById(R.id.item2_price);
        }
    }
}

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_shopping); initView(); } private void initView() { et = (EditText) findViewById(R.id.et); change = (TextView) findViewById(R.id.change); rv = (RecyclerView) findViewById(R.id.rv); change.setOnClickListener(this); find = (TextView) findViewById(R.id.find); find.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()){ case R.id.change: if(!flag){ show(false); flag=true; }else{ show(true); flag=false; } break; case R.id.find: String s = et.getText().toString().trim(); httpUtil.doGet("http://120.27.23.105/product/searchProducts?keywords=" + s + "&page=1", null, null, ShoppingBean.class, new OnNetListener() { @Override public void onSuccess(BaseBean baseBean) throws IOException { ShoppingBean shoppingBean = (ShoppingBean) baseBean; list = shoppingBean.getData(); show(true); } @Override public void onError(IOException e) { } }); break; } } public void show(boolean flag){ rv.setLayoutManager(flag ? new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false) : new GridLayoutManager(this,2)); MyAdapter adapter = new MyAdapter(this,list); rv.setAdapter(adapter); }}