Android 更新检查脚本（Pydroid 3）

扮演一名专业 Python 开发者。你是业内顶尖的开发者之一，目前以自由职业者身份工作。你的任务是编写一个可在 Android 手机上使用 Pydroid 3 运行的 Python 脚本。

你的脚本应满足以下要求：
- 提供一个菜单，包含多种更新检查选项：系统更新、安全更新、Google Play 更新等。
- 允许用户检查所有选项的更新，或仅检查所选的一项更新。
- 显示可用的更新内容，让用户选择是否执行更新，并显示进度条，同时呈现详细信息，例如更新包大小、下载速度和剩余预估时间。
- 为每种更新类型采用与其主题相符的彩色界面设计。
- 整个代码须控制在 300 行以内，且全部写入单个名为 `app.py` 的文件中。
- 包含清晰的注释说明。

以下是你可能采用的脚本结构简化示例：

```python
# 导入必要模块
import os
import time
from some_gui_library import Menu, ProgressBar

# 定义更新检查函数

def check_system_update():
    # 实现系统更新检查逻辑
    pass

def check_security_update():
    # 实现安全更新检查逻辑
    pass

def check_google_play_update():
    # 实现 Google Play 更新检查逻辑
    pass

# 主函数：显示菜单并处理用户输入
def main():
    menu = Menu()
    menu.add_option('检查系统更新', check_system_update)
    menu.add_option('检查安全更新', check_security_update)
    menu.add_option('检查 Google Play 更新', check_google_play_update)
    menu.add_option('检查全部更新', lambda: [check_system_update(), check_security_update(), check_google_play_update()])
    
    while True:
        choice = menu.show()
        if choice is None:
            break
        else:
            choice()
            # 显示进度条及更新信息
            progress_bar = ProgressBar()
            progress_bar.start()

# 运行主函数
if __name__ == '__main__':
    main()
```

注意：此脚本仅为模板，需补充实际的更新检查逻辑与 GUI 处理逻辑。请根据 Pydroid 3 的实际支持环境及你的具体需求，选用适配的库与方法进行定制化实现。

Act as a professional Python coder. You are one of the best in your industry and currently freelancing. Your task is to create a Python script that works on an Android phone using Pydroid 3.

Your script should:
- Provide a menu with options for checking updates: system updates, security updates, Google Play updates, etc.
- Allow the user to check for updates on all options or a selected one.
- Display updates available, let the user choose to update, and show a progress bar with details such as update size, download speed, and estimated time remaining.
- Use colorful designs related to each type of update.
- Keep the code under 300 lines in a single file called `app.py`.
- Include comments for clarity.

Here is a simplified version of how you might structure this script:

```python
# Import necessary modules
import os
import time
from some_gui_library import Menu, ProgressBar

# Define update functions

def check_system_update():
    # Implement system update checking logic
    pass

def check_security_update():
    # Implement security update checking logic
    pass

def check_google_play_update():
    # Implement Google Play update checking logic
    pass

# Main function to display menu and handle user input
def main():
    menu = Menu()
    menu.add_option('Check System Updates', check_system_update)
    menu.add_option('Check Security Updates', check_security_update)
    menu.add_option('Check Google Play Updates', check_google_play_update)
    menu.add_option('Check All Updates', lambda: [check_system_update(), check_security_update(), check_google_play_update()])
    
    while True:
        choice = menu.show()
        if choice is None:
            break
        else:
            choice()
            # Display progress bar and update information
            progress_bar = ProgressBar()
            progress_bar.start()

# Run the main function
if __name__ == '__main__':
    main()
```

Note: This script is a template and requires the implementation of actual update checking and GUI handling logic. Customize it with actual libraries and methods suitable for Pydroid 3 and your specific needs.