Pyperclip模块在Android上失败

import jnius

def copy_to_clipboard(text):
    PythonActivity = jnius.autoclass('org.kivy.android.PythonActivity')
    Context = jnius.autoclass('android.content.Context')
    ClipboardManager = jnius.autoclass('android.content.ClipboardManager')

    context = PythonActivity.mActivity
    clipboard = context.getSystemService(Context.CLIPBOARD_SERVICE)
    clip = ClipData.newPlainText("text", text)
    clipboard.setPrimaryClip(clip)

def paste_from_clipboard():
    PythonActivity = jnius.autoclass('org.kivy.android.PythonActivity')
    Context = jnius.autoclass('android.content.Context')
    ClipboardManager = jnius.autoclass('android.content.ClipboardManager')

    context = PythonActivity.mActivity
    clipboard = context.getSystemService(Context.CLIPBOARD_SERVICE)
    clip = clipboard.getPrimaryClip()
    if clip.getItemCount() > 0:
        return clip.getItemAt(0).getText()
    return None

# 示例用法
copy_to_clipboard("Hello, Android!")
text = paste_from_clipboard()
print(text)  # 输出 "Hello, Android!"