用android studio做一个汽车推荐app的实现代码

这里是一个简单的汽车推荐App的实现代码示例，它是基于Android Studio开发的。这个App可以根据用户的需求和偏好来推荐适合他们的汽车品牌和型号。

*布局文件：activity_main.xml*

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="请选择您的需求和偏好:" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="您的预算（万元）:" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:text="20" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="您的用途:" />

    <RadioGroup
        android:id="@+id/radioGroup1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <RadioButton
            android:id="@+id/radioButton1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="城市代步" />

        <RadioButton
            android:id="@+id/radioButton2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="长途出行" />

        <RadioButton
            android:id="@+id/radioButton3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="越野" />
    </RadioGroup>

    <TextView
        android:id="@+id/textView4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="您的喜好:" />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="外观" />

    <CheckBox
        android:id="@+id/checkBox2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="车内空间" />

    <CheckBox
        android:id="@+id/checkBox3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="燃油经济性" />

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="推荐汽车" />

    <TextView
        android:id="@+id/textView5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="推荐结果:" />

    <TextView
        android:id="@+id/textView6"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

*Java代码：MainActivity.java*

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private EditText editText1;
    private RadioGroup radioGroup1;
    private CheckBox checkBox1;
    private CheckBox checkBox2;
    private CheckBox checkBox3;
    private TextView textView6;
    private Button button1;
    private List<Car> carList;

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

    private void initView() {
        editText1 = findViewById(R.id.editText1);
        radioGroup1 = findViewById(R.id.radioGroup1);
        checkBox1 = findViewById(R.id.checkBox1);
        checkBox2 = findViewById(R.id.checkBox2);
        checkBox3 = findViewById(R.id.checkBox3);
        textView6 = findViewById(R.id.textView6);
        button1 = findViewById(R.id.button1);
    }

    private void initData() {
        //初始化汽车数据
        carList = new ArrayList<>();
        carList.add(new Car("Benz", "C-Class", 25, "city", "appearance", "fuel"));
        carList.add(new Car("BMW", "3 Series", 24, "city", "appearance", "fuel"));
        carList.add(new Car("Audi", "A4", 23, "city", "appearance", "fuel"));
        carList.add(new Car("Lexus", "ES", 26, "city", "interior", "fuel"));
        carList.add(new Car("Honda", "Accord", 20, "city", "interior", "fuel"));
        carList.add(new Car("Toyota", "Camry", 18, "city", "interior", "fuel"));
        carList.add(new Car("Jeep", "Wrangler", 35, "off-road", "appearance", "fuel"));
        carList.add(new Car("Land Rover", "Defender", 30, "off-road", "appearance", "fuel"));
        carList.add(new Car("Toyota", "Land Cruiser", 32, "off-road", "interior", "fuel"));
        carList.add(new Car("Tesla", "Model S", 70, "long distance", "appearance", "electric"));
        carList.add(new Car("Porsche", "Taycan", 80, "long distance", "appearance", "electric"));
        carList.add(new Car("Nissan", "Leaf", 40, "long distance", "interior", "electric"));
    }

    private void initEvent() {
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String budgetStr = editText1.getText().toString();
                if (budgetStr.isEmpty()) {
                    textView6.setText("请填写预算！");
                    return;
                }
                int budget = Integer.parseInt(budgetStr);
                String usage = "";
                int usageId = radioGroup1.getCheckedRadioButtonId();
                if (usageId == R.id.radioButton1) {
                    usage = "city";
                } else if (usageId == R.id.radioButton2) {
                    usage = "long distance";
                } else if (usageId == R.id.radioButton3) {
                    usage = "off-road";
                } else {
                    textView6.setText("请选择用途！");
                    return;
                }
                String preference = "";
                if (checkBox1.isChecked()) {
                    preference += "appearance";
                }
                if (checkBox2.isChecked()) {
                    preference += "interior";
                }
                if (checkBox3.isChecked()) {
                    preference += "fuel";
                }
                if (preference.isEmpty()) {
                    textView6.setText("请选择偏好！");
                    return;
                }

                List<Car> recommendList = new ArrayList<>();
                for (Car car : carList) {
                    if (car.getUsage().equals(usage) && car.getPrice() <= budget && car.getPreference().indexOf(preference) >= 0) {
                        recommendList.add(car);
                    }
                }
                if (recommendList.size() > 0) {
                    StringBuilder sb = new StringBuilder();
                    for (Car car : recommendList) {
                        sb.append(car.getBrand()).append(" ").append(car.getModel()).append("\n");
                    }
                    textView6.setText(sb.toString());
                } else {
                    textView6.setText("没有找到合适的汽车！");
                }
            }
        });
    }

    private class Car {
        private String brand;
        private String model;
        private int price;
        private String usage;
        private String preference;
        private String fuelType;

        public Car(String brand, String model, int price, String usage, String preference, String fuelType) {
            this.brand = brand;
            this.model = model;
            this.price = price;
            this.usage = usage;
            this.preference = preference;
            this.fuelType = fuelType;
        }

        public String getBrand() {
            return brand;
        }

        public String getModel() {
            return model;
        }

        public int getPrice() {
            return price;
        }

        public String getUsage() {
            return usage;
        }

        public String getPreference() {
            return preference;
        }

        public String getFuelType() {
            return fuelType;
        }
    }
}

在这个示例中，我们使用了EditText、RadioGroup、CheckBox、Button和TextView等常见的UI组件来实现汽车推荐的功能。我们在Java代码中定义了一个Car类，用于表示汽车的品牌、型号、价格、用途、偏好和燃料类型等属性。在初始化时，我们创建了一个包含汽车数据的List，并在点击“推荐汽车”按钮时根据用户的需求和偏好来筛选出符合条件的汽车，并在TextView中显示推荐结果。