Useful reddit post:
https://www.reddit.com/r/androiddev/comments/1bdz4i1/weekly_feedback_thread_link_regarding_the_20/ [archive]
Dedicated reddit sub:
r/AndroidClosedTesting
There is a web service that claims to solve the problem. It is available here:
https://www.20testers.com/
As usual, there is an app for that, too:
https://play.google.com/store/apps/details?id=com.testerscommunity
The way to prolong the life of your Li-ion battery is to keep it charged between 40% and 80% all the time. Technical details about Li-ion batteries are available at the following link: BU-808: How to Prolong Lithium-based Batteries.
I discovered these facts in 2017, and that's when I published a small Android app that alerts me when it's the right time to connect/disconnect the charger. Healthy Battery Charging was just a minimum viable product, a tool for my own use. I never planed to monetize it, so I released as a free app, without ads, and I never updated it since.
Fast forward to the year 2024, I have decided to revisit the app, just for the sake of refreshing my knowledge about the way Android handles notifications. A lot of things changed over the years, and I ended up almost rewriting the complete app. And redesigning it, since I am already investing my time.
I've decided to utilize this blog post to track my own design updates and organize my thoughts around notification handling on android. So here we go ...
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Not sure about you, but I can notice the difference in my own design skills after taking a UX/UI course. 😉
The app schedules a background repeating alarm to check battery and power connection status. The alarm repeats every 15 minutes, though all alarms on android are now inexact and the alarm can be batched with other alarms and triggered later, for example when the device wakes up from the sleep. But for this use case, an exact alarm isn't necessary.
There are situations where pausing the repeating alarm would make sense - once the notification is displayed to the user, it's not necessary to check the status again until the charger is connected/disconnected. The previous app version used to work this way - it had a receiver registered for android.intent.action.ACTION_POWER_CONNECTED and android.intent.action.ACTION_POWER_DISCONNECTED. However, starting from API level 26, these events are not broadcasted to receivers running in the background [docs, exceptions]. They are still broadcasted to foreground services.
When targeting API level 34 or higher, all foreground services must be declared with their service types using android:foregroundServiceType. Currently, the specialUse type seems most suitable for this use case. Additionally, you need to request FOREGROUND_SERVICE permission.
Furthermore, apps targeting API level 31 or higher can't start foreground services while running in the background, except for a few special cases.
To maintain the same functionality, a foreground service needs to be started from the boot receiver. The service would need to permanently display a notification. It would not be possible to dismiss it (no notification = no service running), so perhaps it would just change it's text from "Monitoring the battery" to "Connect/Disconnect the charger". I find a permanent notification a bit too much for an app that is supposed to silently run in the background and be invisible most of the time.
For this reason, at the moment I am preferring the simple approach:
Other relevant questions and answers on StackOverflow:
How to listen for power connected Android > 8
How to check which notifications are active in status bar in Android Dev?
Android - AlarmManager is not working after app is closed
https://developer.android.com/reference/android/content/pm/ServiceInfo?hl=en#FOREGROUND_SERVICE_TYPE_SPECIAL_USE
https://developer.android.com/reference/android/content/pm/ServiceInfo?hl=en#FOREGROUND_SERVICE_TYPE_SPECIAL_USE
I was using SyntaxHighlighter Evolved, but after I updated the Enfold theme, it's not working anymore. At least not in the classic editor.
I have tried Code Block Pro, I haven't figured out how to make it work with classic editor either. Enlighter doesn't seem to have been updated for a year or so, so in the end, I chose Prismatic.
File -> Preferences -> Settings (or Ctrl+,)
Search for term: files.exclude
Click on Add Pattern
Add: **/__pycache__
Click on OK
Done!
Did you know that first ever 'elevator
pitch' was done in an elevator? And it was about - elevators? Elevator
brakes, to be more precise.
In the year 1853, Elisha Graves Otis
invented a system that would automatically halt an elevator if the
hoisting rope snapped. The sales didn't go as Elisha expected, so he
decided to publicly demonstrate his invention at the exhibition at the
New York Crystal Palace in 1854. An elevator was installed, and while he
was in it, Elisha asked his assistant to cut the hoisting rope.
Demonstration was successful and demand for safe elevators began to
rise.
https://en.wikipedia.org/wiki/Elisha_Otis
Open the terminal windows inside Android Studio and type the following:
cd $Env:LOCALAPPDATA\Android\sdk\platform-tools
./adb connect 192.168.2.142:38207
Replace the IP address and port with the data that you see when you enable wireless debugging on your device.
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