Database Develop

Noob development question: avc permission denied { open } on zip file, Marshmallow

This question was also asked in StackOverflow by me. (http://stackoverflow.com/questions/34547745/android-marshmallow-new-file-gives-permission-denied)
My apologies if this has been asked, but the only articles/threads for SELinux explained the policies and didn't have a procedure on Android, OR were not for Android.
Currently writing an app where content (in a small zip file) is downloaded from an external location and stored inside /data/data/package_name_removed/user1/, to be read later.
I currently have a zip file in that directory "Test.zip".
A try-catch loop containing:
Code:
//where filename is Test.zip
//and userDir = "user1"
//and sourceContext is passed from the base Activity calling this class that does not inherit Activity
Log.d("Target file is", sourceContext.getFilesDir()+"/"+userDir +"/"+ fileName);
File file = new File(sourceContext.getFilesDir()+"/"+userDir +"/"+ fileName);
ZipFile loadedFile = new ZipFile(file);
Doesn't seem to work in Marshmallow:
Code:
D/Target file is: /data/data/package_name_removed/files/user1/Test.zip
W/package_name_removed: type=1400 audit(0.0:11699): avc: denied { open } for name="Test.zip" dev="mmcblk0p29" ino=57426 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:app_data_file:s0 tclass=file permissive=0
"avc" is a SELINUX error according to the documentation.
This is a Log.d of the IOException getMessage; I think this one's generated from the new File() statement:
Code:
D/Log_title_omitted: /data/data/package_name_removed/files/user1/Test.zip: open failed: EACCES (Permission denied)
I'm pretty sure I do not need READ/WRITE_EXTERNAL_STORAGE at this point as I'm in a directory that is the app's personal directory, which the app is supposed to have access to anyway.
I don't think I should change SELINUX to Permissive in order for this to work, I can't guarantee this flag is set on any other device but mine.
Any help here? Or is the procedure now to get write permissions to a location that isn't guaranteed to exist?

Answer found on StackOverflow:
Manually copying the file into the app's own data/data/package_name/ directory on a rooted device will not work if SELinux is "enforcing" - The app must own the file by "creating" it. Giving it r permissions across the board isn't enough.
No idea how this is for places requiring READ_EXTERNAL.
My solution involved creating a temporary http download service to pass the file along.

Local path doesn't exist

Hello,
i create a new project, so i have a "hello world" program which created. I run this program and i have a error.
Code:
Waiting for device.
Target device: Nexus_5_API_21_x86 [emulator-5554]
Uploading file
local path: ..\app-debug.apk
remote path: /data/local/tmp/com.example.user.rotationecran
Local path doesn't exist.
I don't have the file app-debug.apk in my folder's project

create debug-app in build tab on android studio
check that in manifest if your app is enabled for debugging

Unable to create Debug Bridge: Unable to prepare for adb server creation: null

Unable to use Android Studio 4.1.
Error log attached.

you dont have adb installed
install it like:
Requirements :
1) Java SE Development Kit http://www.oracle.com/technetwork/ja...s-2133151.html
2) android-sdk-windows (Archive) https://developer.android.com/sdk/older_releases.html Procedure :
------------------
1) Install Java JDK in C:\Program Files
2) Extract android-sdk-windows in C:\
3) Go to desktop
4) Right_Click on My Computer
5) Left_Click on Properties
6) Left_Click on Advance System Settings
7) Left_Click on Environment Variables
8) (System Variables) Scroll down and select PATH option
9) Left_Click on Edit
10) Add New Path [C:\android-sdk-windows\tools]
11) Click ok
12) Run Command Prompt
13) Type adb and press enter Congrats you successfully installed adb in your pc

A problem occurred configuring project

I am trying to compile some C++ source files into a native library using Android studio, NDK and Cmake, but upon building, I get the error:
Code:
A problem occurred configuring project ':mobile'.
> C:\Users\User\Documents\B3d\mobile\.externalNativeBuild\cmake\debug\armeabi-v7a\compile_commands.json
I went to the folder mentioned in the error and 'compile_commands.json' does not exist there. What could be the problem?
After upgrading gradle plugin, I get the error:
Code:
C:\Users\User\Documents\B3d\mobile\CMakeLists.txt : C/C++ debug|armeabi-v7a : Could not get version from cmake.dir path '"C:\Android\android-sdk\cmake\3.19.0"'.
I removed the quotes from cmake.dir path in local.properties and this error was gone, next I got another error:
Code:
exception while building Json $C:\Users\User\Documents\B3d\tv\.cxx\cmake\debug\armeabi-v7a\compile_commands.json (The system cannot find the file specified)

Plugin error: kotlin-idea.jar contains invalid plugin descriptor

Hello guys.
How can i fix this?:
Plugin error: File '~\AppData\Roaming\Google\AndroidStudio2021.2\plugins\Kotlin\lib\kotlin-idea.jar' contains invalid plugin descriptor
It happens when i start android studio and open any project.
When i open any second project it doesnt.