使用Flet构建APK时遇WinError 193错误，求技术帮助

错误详情 #

执行命令 flet build apk -vv 构建APK时，在生成应用图标阶段抛出异常：

Flutter bootstrap directory: C:\Users\notar\AppData\Local\Temp\flet_flutter_build_BMvPfRFlpx

Creating Flutter bootstrap project...OK

Customizing app icons and splash images...Copying E:\Shehzad\Programming\Rose Elon\MYapp\assets\icon.png to C:\Users\notar\AppData\Local\Temp\flet_flutter_build_BMvPfRFlpx\images

OK

Generating app icons...Traceback (most recent call last):

File "", line 198, in _run_module_as_main

File "", line 88, in run_code

File "F:\Scripts\flet.exe_main.py", line 7, in

File "F:\Lib\site-packages\flet\cli\cli.py", line 83, in main

args.handler(args)

File "F:\Lib\site-packages\flet\cli\commands\build.py", line 518, in handle

icons_result = self.run(

^^^^^^^^^

File "F:\Lib\site-packages\flet\cli\commands\build.py", line 731, in run

r = subprocess.run(

^^^^^^^^^^^^^^^

File "F:\Lib\subprocess.py", line 548, in run

with Popen(*popenargs, **kwargs) as process:

^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "F:\Lib\subprocess.py", line 1026, in __init__

self._execute_child(args, executable, preexec_fn, close_fds,

File "F:\Lib\subprocess.py", line 1538, in _execute_child

hp, ht, pid, tid = _winapi.CreateProcess(executable, args,

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

OSError: [WinError 193] %1 is not a valid Win32 application

修复步骤 #

• 检查Flutter环境：打开终端执行 flutter doctor，修复所有提示的依赖问题（如Android SDK、JDK配置），确保Flutter工具链完整可用。
• 验证图标文件：确认assets/icon.png是无损坏的标准PNG格式，尺寸建议不小于192x192像素，可替换为已知正常的PNG图标重试。
• 清理临时构建目录：删除错误提示中的临时目录C:\Users\notar\AppData\Local\Temp\flet_flutter_build_BMvPfRFlpx，清除旧缓存后重新执行构建命令。
• 匹配Python与Flutter位数：确保Python和Flutter同为32位或64位版本，避免跨位数调用导致的兼容性问题。
• 重装Flet依赖：执行 pip uninstall flet 卸载当前版本，再用 pip install flet --upgrade 重新安装，修复可能损坏的依赖文件。

内容的提问来源于stack exchange，提问作者Aristotle