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最新推荐文章于 2024-09-03 01:28:26 发布

原创最新推荐文章于 2024-09-03 01:28:26 发布 · 208 阅读

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CC 4.0 BY-SA版权

本文详细介绍了一个基于Android平台的购物车功能实现过程，包括XML布局设计、RecycleView的使用、数据加载与展示、CheckBox的选择同步及总价计算等功能。通过具体的代码示例，展示了如何创建一个完整的购物车页面。

//CartActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    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="wrap_content"
    tools:context=".CartActivity">

    <com.jcodecraeer.xrecyclerview.XRecyclerView
        android:id="@+id/cartGV"
        android:layout_above="@+id/cart_bottom_layout"
        android:layout_alignParentTop="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</RelativeLayout>

//CartActivity

package com.bwie.yuekao;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.util.Log;
import android.view.View;
import android.widget.CheckBox;
import android.widget.TextView;

import com.bwie.yuekao.adapter.CartAdapter;
import com.bwie.yuekao.bean.CartBean;
import com.bwie.yuekao.common.Contonts;
import com.bwie.yuekao.presenter.Cartpresenter;
import com.bwie.yuekao.view.IcartView;
import com.jcodecraeer.xrecyclerview.XRecyclerView;

import java.util.HashMap;
import java.util.List;

public class CartActivity extends AppCompatActivity implements IcartView{

    private XRecyclerView xRecyclerView;
    private CheckBox allCheckbox;
    private TextView totalPriceTv;
    private int page=1;
    private Cartpresenter cartpresenter;
    private List<CartBean.DataBean> list;
    private CartAdapter cartAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_cart);
        initView();
        initData();
    }

    private void initData() {
        loadData();
    }

    private void loadData() {
        HashMap<String,String> params = new HashMap<>();
        params.put("uid","71");
        params.put("page",page+"");
        cartpresenter = new Cartpresenter(this);
        cartpresenter.getCarts(params, Contonts.GETCARTS);

}

    //初始化控件
    private void initView() {
        xRecyclerView = findViewById(R.id.cartGV);
        allCheckbox = findViewById(R.id.allCheckbox);
        totalPriceTv = findViewById(R.id.totalpriceTv);
        xRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        xRecyclerView.setLoadingMoreEnabled(true);
        xRecyclerView.setLoadingListener(new XRecyclerView.LoadingListener() {
            @Override
            public void onRefresh() {
                page=1;
                loadData();
            }

            @Override
            public void onLoadMore() {
                page++;
                loadData();
            }
        });
        allCheckbox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (allCheckbox.isChecked()){
                    if (list !=null && list.size()>0){
                        for (int i =0;i<list.size();i++){
                            list.get(i).setSelected(true);
                            for (int i1=0;i1<list.get(i).getList().size();i1++){
                                list.get(i).getList().get(i1).setSelected(true);
                            }
                        }
                    }
                }else{
                    if (list!=null && list.size() >0){
                        for (int i=0;i<list.size();i++){
                            list.get(i).setSelected(false);
                            for (int i1=0;i1<list.get(i).getList().size();i1++){
                                list.get(i).getList().get(i1).setSelected(false);
                            }
                        }
                    }
                }
                cartAdapter.notifyDataSetChanged();

            }
        });
    }

public void buy(View view) {
}

    @Override
    public void success(CartBean cartBean) {
        if (cartBean!=null && cartBean.getData()!=null){
            list = cartBean.getData();
            Log.i("bbbbbb",list+"");
            cartAdapter = new CartAdapter(CartActivity.this, list);
            xRecyclerView.setLayoutManager(new LinearLayoutManager(CartActivity.this));
            xRecyclerView.setAdapter(cartAdapter);
            xRecyclerView.refreshComplete();
        }
    }

@Override
public void error(String msg) {

}
}