Android APP mkdir with dirname before write file

+        File tempDownloadedFile=new File(otaItem.destination);
+        tempDownloadedFile.getParentFile().mkdirs();
+        try {
+            chmod(tempDownloadedFile.getParent(), 0755);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }

If you put 2 app in the same folder

PackageManager: Failed to parse /oem/app/apppreload: Inconsistent package com.google.android.inputmethod.korean in /oem/app/apppreload/com.google.android.inputmethod.korean.apk; expected com.facebook.katana

Android APP write to /cache partition

https://android.googlesource.com/platform/packages/providers/DownloadProvider/+/eclair-release/AndroidManifest.xml#19

search or show sepolicy

$ ./external/selinux/prebuilts/bin/sesearch -A sepolicy | grep "platform_app\ oemfs"
allow platform_app oemfs:dir { rename search setattr read lock create reparent getattr write ioctl rmdir remove_name open add_name };
allow platform_app oemfs:file { rename setattr read lock create getattr write ioctl unlink open append };
allow platform_app oemfs:lnk_file { read getattr };