Samsung Galaxy A5 2016 – GAPPS error(s) – LineageOS

I am getting error(s) while trying to install GAPPS on my Samsung Galaxy A5 (2016). Have installed LineageOS (17.1 – Android 10) successfully, but when I am trying to install GAPPS I get two errors so far, Code 64 and Code 20.

Tried:

ARM64 -> Android 10.0 -> Nano => Code 64

ARM64 -> Android 7.0 -> Nano => Code 20

Could you please help me out here? Thank you.

unity – Data structure for objects in a galaxy of star systems

I’m having some difficulty coming up with the appropriate data structure to use for a game.

I’m aiming for a galaxy view with tens of thousands of visitable star systems.

Galaxy screenshot

Hierarchically, each star system can contain one or more of the following:

  • Planets (and their moons)
  • Asteroid Belts
  • Megastructures (and their moons/sub-structures)

All of the above can have “points of interest” (POI) eg a station in low orbit, a surface resource node, a docking bay.

I don’t particularly care about physical location within a system beyond knowing its order in the hierarchy (I’ll be showing a list of locations, rather than trying to render them in 3D space). So I can treat all objects within a system as located at the star for the pursposes of calculation.

I do, however, need a way to specify routes from any Planet/AsteroidBelt/Moon/Megastructure/POI to any other. I also need to be able to search for other locations meeting certain criteria (both to offer as destinations in the UI and to handle rendering).

Each type of location will have some unique properties (Asteroid belts have resource distributions, for example whereas planets ave atmospheres) but they also have lots of common properties (inventory, owner, comms network node id, etc).

Obviously, with the numbers I’m considering I need to take a sparse/lazy generated approach. Currently the galaxy is built entirely in the GPU and stars are only presented to the CPU when the user first clicks on them.

That lends itself nicely to a hierarchical data structure with a load-on-first-access approach. Click on a star and it’s added to the list, so the name is saved. Scan/visit it and I’ll generate the system contents.

Unfortunately, I also need to be able to search across all generated locations efficiently (given an ID, find the star system coordinates, find planets with an atmosphere like X, find any location with X in its inventory) in a potentially huge search space.

That doesn’t align with recursively walking up/down trees.

I considered using a heirarchy and manually maintaining a number of separate indices to speed up searching. It’s doable but a pain and error-prone. It also feels like one of those solutions where I’m going to keep finding one more type of query I need to support and before long I’m trying to implement a minimal database.

Speaking of which I also need to persist this data at some point. Currently I’m serializing to a densely packed binary blob.

So… I took a step back and wondered whether I should actually use a database. I can see the benefits of using something like SQLite which I could bundle with the game and would handle persistence, indices, and the rest.

After spending a couple of days implementing the basics, I can see this is going to be quite a long and involved process.

None of the friendly tooling works well in Unity, so I can’t take advantage of entity framework w/ code first, nor nice Linq-To-Sqlite predicate handling. Even worse, most of the libraries to work with EF are tightly coupled to windows. EF Core seems like an option but I haven’t been able to get it working in Unity (I need to do some assembly version mapping but as Unity overwrites the project file regularly and doesn’t seem to support this itself, I think it’s a losing battle).

So I’ve headed down the route of implementing a data layer that generates SQL as needed.

I can do that, but it opens up a huge can of worms in terms of manually maintaining the DB schema. I’m going to have to start tracking a DB version and bundling migration scripts with any update/patch. It’s a whole new maintenance burden.

So… What am I missing? What’s the elegant way to store a sparse hierarchy of data whilst still supporting flexible search across disparate object types that just happen to have a lot of common properties?

lock screens – Turn off “double-tap to unlock” on Samsung Galaxy S7

For some reason, whenever someone calls me, the Samsung Galaxy S7 now shows the phone put, tells me to double-tap to unlock, then it does it a few seconds later. I have never seen this before, never wanted to double-tap.

I have gone to the talkback and it is off.

I don’t know why it started doing this but how do I make it stop?

reboot – Samsung Galaxy A10 restarts automatically

I have had my mobile for almost a year, but recently it started to restart unexpectedly. This happens most often while charging, but exceptionally it happens at other times. It only occurs to me that it causes unstable applications, but I can only guess which causes it, unless the problem is somewhere else.

Please help.

Thank you.

PS. Samsung Galaxy A10 – Android 10 (ONE UI 2.0)

rooting – Samsung Galaxy Tab E SM-T560 bricked

Recently, I tried to root my Samsung Galaxy Tab E T-560 and I was unsuccessful. This is the first device I tried to root so I do not have much knowledge about this topic. I decided to root the tablet because the tablet stuck on Android 4.4 and I cannot launch many apps from the Play store.

I followed one tutorial which was specifically for this tablet. First I installed USB Drivers on my notebook, installed software Odin3 v3.14.4, and downloaded Samsung Auto-Root pack and unpacked files.

On the tablet, I opened Settings, enabled Developer settings, and turned on OEM LOCK. Then I opened the Odin software and with the AP button, I selected a file with .md5 extension (CF-Auto-Root-s5neolte-s5neoltex-smg903f.tar.md5). Next, I turned my tablet into download mode and connect it to my notebook with a USB cable. Last, I pressed the Start button, and after some time rooting failed.

Now my device is bricked and it stuck on the screen with the message:

“Firmware upgrade encountered an issue. Please select recovery mode in
Kies & try again.”

Can someone please tell me if I can unbrick my device and what I did wrong? I suppose that I chose the wrong .md5 file but unfortunately, I believed what the tutorial says.

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jpeg – .jpg photos from the external SD card of Galaxy Grand Prime + display “It appears we don’t support this file format” after transferring them to my PC

My Galaxy Grand Prime + phone was running out of space so I transferred all my WhatsApp media to my SD card. After some time (a few hours I think), many of these photos and videos became unviewable. I even hooked up my phone to my PC and transferred some of those faulty photos there but I cannot view these photos even on my Windows 10 PC. When I tried opening the photo with the Photos program, I saw the message “It appears we don’t support this file format.”

enter image description here

I have no idea why this is happening. How did the media get corrupted?

EDIT 1:

When I open my files using Notepad, I see this:

enter image description here

EDIT 2:

hexed.it shows the following output when I open the file there:

enter image description here

jpeg – .jpg photos from the SD card of Galaxy Grand Prime + display “It appears we don’t support this file format” after transferring them to my PC

My Galaxy Grand Prime + phone was running out of space so I transferred all my WhatsApp media to my SD card. After some time (a few hours I think), many of these photos and videos became unviewable. I even hooked up my phone to my PC and transferred some of those faulty photos there but I cannot view these photos even on my Windows 10 PC. When I tried opening the photo with the Photos program, I saw the message “It appears we don’t support this file format.”

enter image description here

I have no idea why this is happening. How did the media get corrupted?