psync | Synchronize project based on rsync ; support watching changes | Incremental Backup library

I am trying to create a simple redis high availability setup with 1 master, 1 slave and 2 sentinels.

The setup works perfectly when failing over from redis-master to redis-slave. When redis-master recovers, it correctly register itself as slave to the new redis-slave master.

However, when redis-slave as a master goes down, redis-master cannot return as master. The log of redis-master go into the loop showing:

As always, I apologize if this is simplistic, I am a novice with no formal education. I head to Uni in fall of 2018.

I have a password manager which creates a backup of its settings to a file, so the user can restore it at a later time. While I was testing this feature (and the corresponding "Restore" feature) I had it simply put the backup file in the user's download directory. There were no issues with this, and I must say there are no issues with permissions. Runtime and manifest permissions are both present and functional.

The issue arose when I sought to have the backup file put in a directory of my own making. I wanted it to be put in a folder called "PSync" in the user's Documents directory. The code to check if it exists and if not then to create it runs correctly, and no errors are called. It simply does nothing. Attached is the relevant code, and a picture demonstrating the path it uses. It should be noted that the statements inside the } else { run but the file is not created.

First, I would like to apologize if this is a simplistic error. I'm mostly self taught, what I know is incredibly sporadic, and could well be haphazard.

I'm working on an app which works as a password manager. It has a backup and restore function. I got it to work using a fixed directory with no issues, but upon attempting to add a File Picker, there have been issues.

The file location is saved with no issues. Then, one line after it verifies that it was saved, it says the file doesn't exist. Here is the relevant code as well as the error log. I only will include the code up into the crash, what follows is irrelevant but can be provided if asked. PSync.psbk is the file attempting to be read. Frankly, no idea what's wrong, but I assume it's simple.

Code:

The main reason I'm posting here is that I'm currently stuck without a computer that can run an emulator, I've been having to send the APK to my phone to test it. Even if my phone's connected to my computer, or I have a third party emulator running, it wont work. Due to this...I have no error logs.

The app is a simple password manager, and all the other functions thus far work. I was trying to add an export function, I can't get either to actually write anything. I've checked other questions and various sources online, but I cannot seem to figure out what could be causing it. When the method is called, it simply doesn't do anything as far as I can tell. I apologize if I'm missing something, or if there was indeed another question with the same issue. I couldn't find anything missing.

Here is the method I'm using;

EDIT: The code has been updated to reflect a better method of requesting runtime permissions, which was suggested here. This ultimately is what fixed the application.