flashlight | pluggable integration with ElasticSearch to provide | Authentication library

I'm a new learner of flutter, and I meet a problem when I create my appBar for Android apps. There should be a button of the "camera flashlight" icon on the action area of appBar, and users can tap on this icon to choose flashlight options (on/off/auto) from a popupmenu, I finished this step.

But if I want the flashlight icon on the action area of appBar changes with the change of users' choice (e.g. if the user chooses auto, then the appBar icon should display an"auto flashlight"), how should I achieve it?

Thank you so much in advance.

I had tried using an "if" in the appBar action icon widget, and it failed.

Now my code in appBar.dart is

So I have an Inventory and the Items have MataData, that I am scanning for. Although when I try to hook up the public void to the OnClick selection on the Button, it does not show up, why? Code Snipped:

I am trying to implement barcode scanning in my Xamarin form, but no success.
I am able to get the camera working, but I don't see the red line on the screen and it simply refuses to scan anything

I tried this answer. I can see thru my camera, but no red line appears. But I can put the torch on and off

XAML code:

That is, he pressed the button, function No. 1 started, pressed again, function No. started.2 pressed again and again function No. 1 and so on... How to do it with a single MDFloatingActionButton?

UPDATE: I have added the dput() input at the bottom of the post.

I have a large dataset of tweets that I would like to subset by month and year.

data_cleaning$date <- as.Date(data_cleaning$created_at, tryFormats = c("%Y-%m-%d", "%Y/%m/%d"), optional = FALSE)

I used the line of code above to format the date variable in the dataframe below.

I'm currently making a 2D game in Javascript, but I want to the game to have different lighting levels, for example, if I were to create a day and night cycle. However, I want to be able to cut holes in the lighting/foreground, or do something so that I can make certain parts of the screen lit up, for example like a flashlight or candle. Note: I'm also using the P5.js library.

The most obvious idea that came to mind for going about in creating a foreground is just creating a rectangle with some opacity that covers the entire screen. This is good, but how am I supposed cut through this? Obviously, the code below won't work because I'm just layering on another element, and the rectangle is still obstructed and not perfectly clear.

Goal:
I'm trying to create a cursor file which can cover the whole screen with a flashlight effect on a full hd (1920x1080) screen. For that, the cursor image resolution would need to be at 4K (3840x2160) along with having an alpha channel (32bpp). Axialis Cursor Workshop is the only cursor creation program I've tried which goes above the usual 256² pixel limit, but still caps at 512² pixels...

File format analysis:
Looking at the file format specifications, the usual upper bound of 256² pixels might be caused by the CUR/ICO format working with 8 bits for width and height fields each. ANI format looks more promising since it has 32 bits reserved for those. On the flip side, it seems to have no hotspot fields, and itself uses CUR/ICO format for the animation frames, unless the IconFlag bit is set to FALSE. Looking at a cursor file produced by Axialis CW, I see the flag set to TRUE weirdly enough.

Hex edit approach:
I've tried inserting raster data from a (converted) bmp of same size (521²) by the means of hex editing. Then I tried to insert raster data from a 1024² bpm, updating image dimensions and the file size in the headers. Which only kind of works, I guess.

I'd appreciate any help or pointers in the right direction.

Related things, in no particular order:

• install cursor scheme.inf (Creates a certain cursor scheme from cur/ani files)
• Set Cursor.ps1 (Applies a certain cursor scheme & size)
• File format specification index (For the technical details)
• PNG to BMP Converter (Properly converts png to 32bpp bmp files)
• Axialis CursorWorkshop (Can create ani files up to 512² pixels at 32bpp)

Our app fails to install after migrating to the targetSdkVersion 31. On trying to find the issue we found that a library was using FLASHLIGHT permission and we were getting this error while installing:

Installation failed due to: 'Failed to commit install session 130765275 with command cmd package install-commit 130765275. Error: -127: Package com.xxxx.yyyy.zzzz attempting to declare permission android.permission.FLASHLIGHT in non-existing group android.permission-group.HARDWARE_CONTROLS'

Permissions used in the manifest file of library:

I'm trying to follow along here to use a speech recognition model. The model is in C++, and almost all of my experience is in Python.

I installed a virtual machine running Ubuntu, and still the installation procedure was failing for me. I decided to simply try to compile the model so that I could call it in a Python script, as seen at the bottom of the linked page.

I'm trying to use g++ to compile the .cpp model, but I keep getting an error saying that a library that I have installed is not found: