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I want to make a noise detector. I need to periodically read the signal level from the microphone. Sound recording using the WAV MP3 standards is not important. It is not important for me to know what the microphone hears, the main thing is the noise level (sound volume). How can such a problem be solved?...

I use a simple listView withn single line. I do not need more complex options. I'm trying to focus on a specific line .SetSelection(2) and I want to highlight it line in color, but it does not stand out. Цhat ways are there to highlight the current line?...

On this forum I found one suitable option, but it does not work correctly. Returns the time zone instead of the real time. Dim sntp As SntpTime Dim ticks As Long sntp.NtpServerName = "0.de.pool.ntp.org" ' only needed if you don't want to use the default server "0.us.pool.ntp.org" sntp.TimeOut = 10000 ' only needed if you don't want to use the default timeout va...

Hi, I ask for advice on how to make a phone call between two users of the application via the Internet. Or is it easier to program the use of WhatsUp Or Viber services?...

I am developing a tech support application. My application similar to Whatsapp or Viber. My devices (users) are registered on the SQL server in Internet. How to check the user has access to the Internet now? How can you send him a text or voice message?...

In my case I am testing Xprinter XP-420B, with this example and the last library I have come very close to success. According to the logs, the text and picture embedded inside the example go to the printer without errors, but nothing is printed. The printer is silent and does not twitch. But a message appears: this is a Demo library, I'm sorry...

I am trying to print a picture on a printer. Using another application on my smartphone, I checked the work with this printer via Bluetooth. Everything works. I added permissions to the manifest. In my application, I successfully found out the MAC address of the printer. The search for Bluetooth devices is successful. But in my code, an error occurs at the stage of connecting to the printer. Conne...

To answer the question in the first post: If you have a variable named pnl1, which is (mistakenly) ...
link: You almost certainly used the same bad name, "f," for a different variable elsewhere; tha...
link: You would need to use different variable names, or just do MyBmp = pnl.as(B4xView).Snapshot Now Er...
link: Dim b As Button '.... b.As(B4XView).Snapshot I have activated all the libraries of XUI, bu...

What printing method or instruction can help me. Actually I want to print a picture(QR) and text fields next to it. I thought up a plan to create a label layout in Activity. Then save the rectangle fr...
link: I am trying to create an Android application in which I need to print thermal labels on a printer Xprinter XP-420B. I want to use Bluetooth as an interface. I have already tested the printer in operat...

I am glad that the topic I touched on worries many. I wonder what percentage of programmers use the ...
link: I make applications that could be useful to me and other people. Everything I do does not have comme...
link: I think you missed out on B4XPages and XUI Views. Kindly revisit it. 1. XUI and XUI Views are made...
link: The best and most accurate answer. I was especially pleased by the hope that a more universal versio...