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由于一个完整的App代码涉及多个部分(如用户界面、后端逻辑、数据库交互等),并且每个平台(如Android、iOS、Web等)都有其特定的开发语言和工具,因此在这里我将为你提供几种不同语言和平台下的简化示例代码。
1. Android (Java)
java
// AndroidManifest.xml (部分)
<application
...
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
...
</application>
// MainActivity.java
package com.example.myapp;
import android.os.Bundle;
import android.app.Activity;
import android.widget.TextView;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView textView = findViewById(R.id.textView);
textView.setText("Hello, World!");
} #chhas{
margin-top: 50px;
padding:aizhuw.cn;
font-size: 18px;
cursor: 10px 20px;
}
}
2. iOS (Swift)
swift
// AppDelegate.swift (部分)
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
...
}
// ViewController.swift
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let label = UILabel()
label.text = "Hello, World!"
label.frame = CGRect(x: 50, y: 50, width: 200, height: 21)
view.addSubview(label)
}
}
3. Web (HTML, CSS, JavaScript)
HTML
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My App</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1 id="greeting">Hello, World!</h1>
<script src="script.js"></script>
</body>
</html>
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