这是一个简单的Android小程序,使用Material3风格,实现了输入最大最小值,输出随机数,并保证去重。以下是实现代码的示例:

首先,在res/layout目录下创建一个名为activity_main.xml的布局文件,用来定义应用的界面布局:

<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:gravity="center"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="最小值:"
        android:textAppearance="@style/TextAppearance.MaterialComponents.Body1" />

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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="最大值:"
        android:textAppearance="@style/TextAppearance.MaterialComponents.Body1" />

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

    <Button
        android:id="@+id/buttonGenerate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="生成随机数"
        android:textAppearance="@style/TextAppearance.MaterialComponents.Button" />

    <TextView
        android:id="@+id/textViewResult"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:textAppearance="@style/TextAppearance.MaterialComponents.Body1" />

</LinearLayout>

接下来,在MainActivity.java文件中实现逻辑:

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.util.HashSet;
import java.util.Random;
import java.util.Set;

public class MainActivity extends AppCompatActivity {

    private EditText editTextMin, editTextMax;
    private Button buttonGenerate;
    private TextView textViewResult;

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

        editTextMin = findViewById(R.id.editTextMin);
        editTextMax = findViewById(R.id.editTextMax);
        buttonGenerate = findViewById(R.id.buttonGenerate);
        textViewResult = findViewById(R.id.textViewResult);

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

    private void generateRandomNumber() {
        int min = Integer.parseInt(editTextMin.getText().toString());
        int max = Integer.parseInt(editTextMax.getText().toString());

        if (min >= max) {
            textViewResult.setText("最小值不能大于或等于最大值");
            return;
        }

        Set<Integer> numbers = new HashSet<>();
        Random random = new Random();

        while (numbers.size() < max - min + 1) {
            int randomNumber = random.nextInt(max - min + 1) + min;
            numbers.add(randomNumber);
        }

        StringBuilder result = new StringBuilder();
        for (int number : numbers) {
            result.append(number).append(" ");
        }

        textViewResult.setText(result.toString());
    }
}

最后,在AndroidManifest.xml文件中添加以下权限,以允许应用读取和修改外部存储:

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

编译并运行该应用,即可通过输入最大最小值,点击按钮生成随机数,并在界面上显示结果

请制作一个Android小程序用material3风格实现输入最大最小值输出随机数保证去重

原文地址: https://www.cveoy.top/t/topic/inYe 著作权归作者所有。请勿转载和采集!

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