现象
FileOutputStream fout = new FileOutputStream(file)
java.io.FileNotFoundException: /storage/emulated/0/xxxxx/images/ed9a7f7892bf3529ff9209244e87fd57.jpg: open failed: EPERM (Operation not permitted)
android.system.ErrnoException: open failed: EPERM (Operation not permitted)
/storage/emulated/0/xxxxx/images/ed9a7f7892bf3529ff9209244e87fd57.jpg: open failed: EPERM (Operation not permitted)
原因
Android 11 上文件的存储目录有要求了
