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ashwini gupta 28 March 2019

USB Printer in React Native Android APP

In this blog, I am describing to implement USB Printer in react native Application. it is the toughest task to implement printer in our Application. I have learned many libraries and found a  library “react-native-usb-printer” that supports for Android Platform.  It is very easy to use. It detects all connected USB Printer to our device if we got All Printer select one of them as a default Printer.

How to install it?

Installation-

Integrate Module-

To integrate react-native-usb-printer with the rest of your react app just execute:

How to use?

Import-Module-

Find Printer Devices & Connect one of them-

Generate Text for printing-

We have to Note that it print only text String that encodes in “encoding: ‘GBK’ ” System. It Provides it’s own format to print our text. There are following some formatted TAG that supports by this library.

  • “<M> … </M>”  – for Medium text.
  • <CM> … </CM> – center align and Medium text.
  • <C> …</C> – center alignment.
  • <B> …</B> for bold text.
  • many more tag.

Printing Text via Connected Printer-

By this library, we print our page by two types-

  • Print Without Cut Page- By this type, we print our many texts in a single Page.
  • Print With Cut Page – By this type, We print our text String on the page and then cut this page. Real life example- Printing Invoice for separate users

     

Printing Page Image-

Resources:-

https://www.npmjs.com/package/react-native-usb-printer

https://github.com/bondwp/react-native-usb-printer

 

 

Format React Native Tag USB Printer
. . .

Comments (16)

Add Your Comment

  • Ivan Yusuf April 30, 2019 at 5:51 am
    What React native is used? react-native-cli or expo-cli. I am using expo-cli and getting a problem with the RNPrinter.getUSBDeviceList (), where the object does not defined
    Reply
    • ashwini gupta May 6, 2019 at 7:15 pm
      I have used react-native-cli.
      Reply
  • Ivan Yusuf May 4, 2019 at 5:03 am
    What printer do you use in the test?
    Reply
    • ashwini gupta May 6, 2019 at 7:20 pm
      It supports any USB Printers. I have used & test on EPSON POS Printer. Also, deliver App to my client and there is no issue on his printer.
      Reply
      • Ivan Yusuf September 25, 2019 at 8:49 pm
        Thank You, it worked
        Reply
  • Rickard July 8, 2019 at 12:24 pm
    Hi, i tried this tutorial, but run into some problems. Please view about those problems here : https://stackoverflow.com/questions/56928890/react-native-usb-printer-library-not-working

    Thank you.

    Reply
    • ashwini gupta July 8, 2019 at 12:46 pm
      Hello, you need to add tools:replace = “android:allowbackup” on tag with manifest file. AndroidManifest file is found in android -> app of your folder structure.
      look your issue screenshot http://i.prntscr.com/jMd2qcffTd2OHj3RjUV6aA.png

      For More detail for merging Android Manifest click here

      Reply
      • Rickard July 10, 2019 at 6:44 am
        Hi, thank you for replying, i wonder have you ever tested this tutorial for the recent version of react native? We are currently at version 0.60.0. Which react-native version you use to test this library?
        Reply
  • Vaibhav November 1, 2019 at 10:05 am
    Hi Ashwini,
    Thanks for posting this in the above description you have mention “supports for Android Platform” so this library wouldn’t work for IOS devices / IOS platform?
    Reply
    • ashwini gupta November 6, 2019 at 9:49 am
      Thanks for your appreciation. Yes, this library wouldn’t work for iOS platform.
      Reply
  • Dilip Suthar July 1, 2020 at 10:24 am
    I have few questions, it might be helpful if you can answer them-

    1. Is it possible to print image on top of the receipt with this library.
    2. Does it support printing HTML document.
    3. How to align text to the extreme right in a string literal.

    Reply
    • ashwini gupta July 28, 2020 at 11:05 pm
      1. Is it possible to print image on top of the receipt with this library.
      -> yes, in QR tag and pass image url
      2. Does it support printing HTML document.
      -> NO, it have self tag.
      3. How to align text to the extreme right in a string literal.
      -> by using starting spaces
      Reply
  • Dilip Suthar July 1, 2020 at 12:04 pm
    is there any tag to left and right align the text?
    Reply
    • ashwini gupta July 28, 2020 at 11:03 pm
      No, it’s not provided. you can do it by adding some spaces.
      Reply
  • Sameer July 25, 2020 at 9:00 pm
    Hello brother i am using your solution it works fine but I need to print logo and qrCode on the recept it is possible with this solution? if yes how bcx tried allot.. And if no and you have any solution please let me know.. As soon as possible thanks
    Reply
    • ashwini gupta July 28, 2020 at 11:07 pm
      let’s try with passing QR image in QR tag
      Reply

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