SD: BT Printer Bluetooth

Hi, the demo app when i press on "Scan Print Bluetooth" return this error:
java.lang.RuntimeException: Field: LastDiscoveredDevice not found in: anywheresoftware.b4a.objects.Serial$BluetoothAdmin
 
Have you updated the Serial library?
 
zenlab said:
yes! Version 1.26
Click to expand...
Serial 1.30 is last version
I had given you the link in private when I sent you the library.

It is also written in the first post. Please follow the instructions that are indicated carefully.
 
Hallo, there is any function to check if the printer is realy connected to device? My printer after a few seccond autoclose the connection and if I send another print I can't check if i may do
 
The connection to the BT printer is different from a classic printer and does not return information about the status of the printer.

If an associated printer could not be reached, the library after a few attempts generates an error MessageBox. In the next update it will raise a ConnectedToPrint(Success As Boolean) event.
 
Last edited:
BT_Printer 0.13 update

The event has been modified ConnectToPrint now returns a Boolean parameter so as to check if the device has connected to the printer,
Code: Copy 
ConnectToPrint (Success As Boolean)

Also you can change the Width size of the PreView with
Code: Copy 
ResetPreViewWidth (NewWidth as int)
By default, the value is 320dip, but you can change it for different paper sizes.

The examples have been updated
 
I answer a question that has been proposed to me in private.
How can I use other ESC commands with my library?
The library is already equipped with a series of ESC commands, you can use them by listening to ESC_POS.

For example, if you would like to reset the printer:
Code: Copy 
Printer.AddBuffer_ArrayByte(ESC_POS.InitializePrinter.GetBytes("UTF8"))
'or
Printer.AddBuffer_Write(ESC_POS.InitializePrinter)

Other commands are qiesti (you can find them also in the first post in the description of the library)
ESC_POS
Code module
Subs in this code module will be accessible from all modules.
  • Fields:
    • BoldOff As String
    • BoldOn As String
    • DoubleOff As String
    • DoubleOn As String
    • FontA_Bold As String
    • FontA_DoubleHight As String
    • FontA_DoubleWide As String
    • FontA_DoubleWideHight As String
    • FontA_Normal As String
    • FontB_Bold As String
    • FontB_DoubleHight As String
    • FontB_DoubleWide As String
    • FontB_DoubleWideHight As String
    • FontB_Normal As String
    • InitializePrinter As String
 
Last edited:
Keep the good work!

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Thank you for the suggestion. I had already considered this possibility, but I did not consider it necessary.

But if you need to insert it.
 
It´s very userful. I have a header in any print I did, with the header in memory I can send only text... Becames a lot faster print.
 
Hi Star-Dust, I tried your library but I got a toastmessage Demo Library - Sorry Not Available. Thanks very much for your help
 
Hello @virpalacios, as you read in post#1, I attached a demo version to try the library, several methods are disabled except FlushAndClose that allows you to print.

You can keep the full version by making a donation, if you are interested you can get information by contacting me in private
 
Star-Dust said:
(No WRAP, No Java Only B4A)

BT_Printer library allows you to print text and image to a bluetooth thermal printers

To print the QR CODES with your BT thermal printer you can create an image containing the QR code with the help of the @Erel library (here) or can use library of @Johan Schoeman (here)

Required: B4A 8+ and Serial Library 1.30+ (here)

To try print with the demo version you can only use the FlushAndClose command which lasts 7 days and then disables.
The full version of the library will be issued to those making a donation. In the donation indicate the library you want and your NickName

View attachment 71755 View attachment 71781

SD_BT_Printer

Author: Star-Dust
Version: 0.13
  • BT_Printer
    Note: Android 6+ add on manifest
    AddPermission(android.permission.ACCESS_COARSE_LOCATION)
    • Events:
      • BluetoothIsDisabled
      • ConnectedToPrint (Success As Boolean)
      • DisconnectToPrint (Mac As String)
      • DiscoveryFinished
      • DiscoveryNewPrinter (Print As NameAndMac, DeviceClass As Int)
      • DiscoveryNoDeviceFound
      • ErrorDiscovery
      • ListPrinterAssociated (ListNameAndMac As List)
      • PrinterSelected (Mac As String)
      • SendTerminated
    • Const:
      • Const_AUDIO_VIDEO As Int
      • Const_COMPUTER As Int
      • Const_HEALTH As Int
      • Const_IMAGING As Int
      • Const_MISC As Int
      • Const_NETWORKING As Int
      • Const_PERIPHERAL As Int
      • Const_PHONE As Int
      • Const_TOY As Int
      • Const_UNCATEGORIZED As Int
      • Const_WEARABLE As Int
    • Functions:
      • AddBuffer_ArrayByte (B As Byte()) As String
      • AddBuffer_BarCode (Code As String) As String
      • AddBuffer_Bitmap (Bmp As Bitmap, ShiftLeft As Int) As String
      • AddBuffer_BitmapAlternativeCoding (Bmp As Bitmap) As String
      • AddBuffer_List_Write (list As List) As String
      • AddBuffer_List_WriteLine (list As List) As String
      • AddBuffer_Tab (ArrayTab As Int()) As String
      • AddBuffer_Write (Text As String) As String
      • AddBuffer_WriteLine (Text As String) As String
      • Class_Globals As String
      • ClearBuffer As String
      • Close As String
      • Connected As Boolean
      • flushAllAndClose
      • Initialize (CallBack As Object, EventName As String, EncodingType As String) As String
        Initializes the object. You can add parameters to this method if needed.
      • IsInitialized As Boolean
        Verifica se l'oggetto sia stato inizializzato.
      • Preview As Bitmap
      • ResetPreViewWidth(NewWidth As Int) As String
      • SearchNewPrinter As String
        select --------------------------------------------
      • SelectFromAssociatedPrinter As String
      • SelectFromMac (Mac As String) As String
      • SendBufferToPrinter
  • ESC_POS
    Code module
    Subs in this code module will be accessible from all modules.
    • Fields:
      • BoldOff As String
      • BoldOn As String
      • DoubleOff As String
      • DoubleOn As String
      • FontA_Bold As String
      • FontA_DoubleHight As String
      • FontA_DoubleWide As String
      • FontA_DoubleWideHight As String
      • FontA_Normal As String
      • FontB_Bold As String
      • FontB_DoubleHight As String
      • FontB_DoubleWide As String
      • FontB_DoubleWideHight As String
      • FontB_Normal As String
      • InitializePrinter As String
    • Functions:
      • Process_Globals As String
  • Encoding
    Code module
    Subs in this code module will be accessible from all modules.
    • Fields:
      • ISO8859 As String
      • UTF8 As String
      • Windows1252 As String
    • Functions:
      • Process_Globals As String
Click to expand...
I hv sent donation. Kindly send me bt printer library
 
Star-Dust said:
(No WRAP, No Java Only B4A)

BT_Printer library allows you to print text and image to a bluetooth thermal printers

To print the QR CODES with your BT thermal printer you can create an image containing the QR code with the help of the @Erel library (here) or can use library of @Johan Schoeman (here)

Required: B4A 8+ and Serial Library 1.30+ (here)

To try print with the demo version you can only use the FlushAndClose command which lasts 7 days and then disables.
The full version of the library will be issued to those making a donation. In the donation indicate the library you want and your NickName

View attachment 71755 View attachment 71781

SD_BT_Printer

Author: Star-Dust
Version: 0.13
  • BT_Printer
    Note: Android 6+ add on manifest
    AddPermission(android.permission.ACCESS_COARSE_LOCATION)
    • Events:
      • BluetoothIsDisabled
      • ConnectedToPrint (Success As Boolean)
      • DisconnectToPrint (Mac As String)
      • DiscoveryFinished
      • DiscoveryNewPrinter (Print As NameAndMac, DeviceClass As Int)
      • DiscoveryNoDeviceFound
      • ErrorDiscovery
      • ListPrinterAssociated (ListNameAndMac As List)
      • PrinterSelected (Mac As String)
      • SendTerminated
    • Const:
      • Const_AUDIO_VIDEO As Int
      • Const_COMPUTER As Int
      • Const_HEALTH As Int
      • Const_IMAGING As Int
      • Const_MISC As Int
      • Const_NETWORKING As Int
      • Const_PERIPHERAL As Int
      • Const_PHONE As Int
      • Const_TOY As Int
      • Const_UNCATEGORIZED As Int
      • Const_WEARABLE As Int
    • Functions:
      • AddBuffer_ArrayByte (B As Byte()) As String
      • AddBuffer_BarCode (Code As String) As String
      • AddBuffer_Bitmap (Bmp As Bitmap, ShiftLeft As Int) As String
      • AddBuffer_BitmapAlternativeCoding (Bmp As Bitmap) As String
      • AddBuffer_List_Write (list As List) As String
      • AddBuffer_List_WriteLine (list As List) As String
      • AddBuffer_Tab (ArrayTab As Int()) As String
      • AddBuffer_Write (Text As String) As String
      • AddBuffer_WriteLine (Text As String) As String
      • Class_Globals As String
      • ClearBuffer As String
      • Close As String
      • Connected As Boolean
      • flushAllAndClose
      • Initialize (CallBack As Object, EventName As String, EncodingType As String) As String
        Initializes the object. You can add parameters to this method if needed.
      • IsInitialized As Boolean
        Verifica se l'oggetto sia stato inizializzato.
      • Preview As Bitmap
      • ResetPreViewWidth(NewWidth As Int) As String
      • SearchNewPrinter As String
        select --------------------------------------------
      • SelectFromAssociatedPrinter As String
      • SelectFromMac (Mac As String) As String
      • SendBufferToPrinter
  • ESC_POS
    Code module
    Subs in this code module will be accessible from all modules.
    • Fields:
      • BoldOff As String
      • BoldOn As String
      • DoubleOff As String
      • DoubleOn As String
      • FontA_Bold As String
      • FontA_DoubleHight As String
      • FontA_DoubleWide As String
      • FontA_DoubleWideHight As String
      • FontA_Normal As String
      • FontB_Bold As String
      • FontB_DoubleHight As String
      • FontB_DoubleWide As String
      • FontB_DoubleWideHight As String
      • FontB_Normal As String
      • InitializePrinter As String
    • Functions:
      • Process_Globals As String
  • Encoding
    Code module
    Subs in this code module will be accessible from all modules.
    • Fields:
      • ISO8859 As String
      • UTF8 As String
      • Windows1252 As String
    • Functions:
      • Process_Globals As String
Click to expand...
sir, i hv sent donation for bt library.
When and hpw u r sending it? If demo is to be downloaded, then how to register it?
My paypal tr id is

ID: 1E889382M39306932 3 February
 
Sorry sir,
when using your sample i did try run on my b4x ver 8.5 and when running on debug it's normal can show the form and printing with Printer.flushAllAndClose and it work. but when i release it to .apk and install on my samsung tab 7.0 and LG Stylus2 Dual2 and try running , it keep showing apps doesn't work and keep closing.

the message is "Unfortunately, Bluetooth Printer Sample has stopped"

any solution ?

i didn't change anything,
and my manifest editor is :
'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: https://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="26"/>
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
'End of default text.


and i'm using only library
Core Version 8.5
RuntimePermission version 1.10
SD_BT_Printer version 0.13




thx
 
What version of Android use these devices.

Does it generate any kind of error or does the app just stop?

Try setting the target SDK to 19 in the manifest. It could be a matter of runtime permissions
 
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