石家庄地铁app

今天完善mainactivity文件，里面包括页面的输入框和按钮的功能实现代码
package com.example.try2;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity {

private EditText etStartStation, etEndStation, etTicketCount;
private Button btnBuyTicket;
private TextView tvResult;

// 地铁线路数据
private final Map<String, List<String>> metroLines = new HashMap<>();
private final Map<String, String> transferStations = new HashMap<>(); // 换乘站及其所属线路

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    etStartStation = findViewById(R.id.etStartStation);
    etEndStation = findViewById(R.id.etEndStation);
    etTicketCount = findViewById(R.id.etTicketCount);
    btnBuyTicket = findViewById(R.id.btnBuyTicket);
    tvResult = findViewById(R.id.tvResult);

    // 初始化地铁线路数据
    initMetroData();

    btnBuyTicket.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            calculateAndDisplayTicketPrice();
        }
    });
}

private void initMetroData() {
    // 1号线站名
    List<String> line1 = Arrays.asList(
            "西王", "时光街", "长城桥", "和平医院", "烈士陵园", "新百广场",
            "解放广场", "平安大街", "北国商城", "博物院", "体育场", "谈固",
            "朝晖桥", "白佛", "留村", "火炬广场", "石家庄东站"
    );
    metroLines.put("1号线", line1);

    // 2号线站名
    List<String> line2 = Arrays.asList(
            "柳辛庄", "庄窠·铁道大学", "义堂", "建和桥", "长安公园", "裕华路",
            "北国商城", "大戏院", "新世隆", "石家庄站"
    );
    metroLines.put("2号线", line2);

    // 3号线站名
    List<String> line3 = Arrays.asList(
            "西三庄", "高柱", "柏林庄", "市庄", "市二中", "新百广场",
            "东里", "槐安桥", "西三教", "石家庄站"
    );
    metroLines.put("3号线", line3);

    // 换乘站信息
    transferStations.put("新百广场", "1号线,3号线");
    transferStations.put("北国商城", "1号线,2号线");
    transferStations.put("石家庄站", "2号线,3号线");
}

private void calculateAndDisplayTicketPrice() {
    String startStation = etStartStation.getText().toString();
    String endStation = etEndStation.getText().toString();
    String ticketCountStr = etTicketCount.getText().toString();

    if (startStation.isEmpty() || endStation.isEmpty() || ticketCountStr.isEmpty()) {
        tvResult.setText("请输入完整信息");
        return;
    }

    int ticketCount = Integer.parseInt(ticketCountStr);

    // 获取起点站和终点站所在的线路
    String startLine = findLineByStation(startStation);
    String endLine = findLineByStation(endStation);

    if (startLine == null || endLine == null) {
        tvResult.setText("站点输入错误，请检查站名");
        return;
    }

    // 如果起点站和终点站在同一线路
    if (startLine.equals(endLine)) {
        int stationCount = calculateStationCount(startStation, endStation, startLine);
        int pricePerTicket = (stationCount + 2) / 3; // 每3站1元，不足3站按1元计算
        int totalPrice = pricePerTicket * ticketCount;
        tvResult.setText("购票成功！总金额：" + totalPrice + "元");
    } else {
        // 跨线路，需要找到换乘站
        String transferStation = findTransferStation(startLine, endLine);
        if (transferStation == null) {
            tvResult.setText("无法找到换乘站，请检查线路");
            return;
        }

        // 计算起点站到换乘站的站数
        int stationCount1 = calculateStationCount(startStation, transferStation, startLine);
        // 计算换乘站到终点站的站数
        int stationCount2 = calculateStationCount(transferStation, endStation, endLine);

        // 总站数
        int totalStationCount = stationCount1 + stationCount2;
        // 票价 = 总站数 / 3（向上取整） + 换乘费用（1元）
        int pricePerTicket = (totalStationCount + 2) / 3 ;
        int totalPrice = pricePerTicket * ticketCount;

        tvResult.setText("购票成功！总金额：" + totalPrice + "元");
    }
}

// 根据站名查找所属线路
private String findLineByStation(String station) {
    for (Map.Entry<String, List<String>> entry : metroLines.entrySet()) {
        if (entry.getValue().contains(station)) {
            return entry.getKey();
        }
    }
    return null;
}

// 计算两个站之间的站数
private int calculateStationCount(String startStation, String endStation, String line) {
    List<String> stations = metroLines.get(line);
    int startIndex = stations.indexOf(startStation);
    int endIndex = stations.indexOf(endStation);
    return Math.abs(endIndex - startIndex);
}

// 查找两个线路之间的换乘站
private String findTransferStation(String startLine, String endLine) {
    for (Map.Entry<String, String> entry : transferStations.entrySet()) {
        String lines = entry.getValue();
        if (lines.contains(startLine) && lines.contains(endLine)) {
            return entry.getKey();
        }
    }
    return null;
}

}
在虚拟机中运行效果如下