QR & Barcode Scanner App Tutorial in Android Studio

[@halo2550000]

Just awesome, you saved an entire student project with this tutorial. 1 billion thanks!

[@adelsehimi2888]

i need u bro

[@3dgiftz]

Does this scanner needs internet

[@AwesomeDevNotes]

Love it. Short and no BS tutorial as it should be 🐣

[@thaliaamargianou7870]

Congrats..! Very good job! Thanks... Your Vtutorials are great with a very simple explanation! Keep up the good work!!! We support you!

[@Indently]

Very happy to hear, thanks for the support!

[@3dgiftz]

Do this scanner needs internet??

[@grampygamer8584]

I did it the Java way for a larf... worked first time! Awesome tutorial, thank you

[@jaysonverzon172]

can show code?

[@mattileazarelenquiblat]

Can you show the code?

[@vijithviswambharan775]

share the code plz

[@programmer1111x]

The "Remeber to subscribe" barcode is so creative to do

[@farhan-momin]

Simple and to the point tutorial! everything was step and step and easy to understand even though i made my app in java, following this tutorial along with help of chatgpt made it super easy thanks very much!

[@Hrit]

Simple and Direct! Loved the tutorial.

[@androidstudio1564]

Very helpful to fellow developers.

[@razvanandrei1694]

Thanks for the tutorial. Very useful. But what if I want to display the dialog with camera permissions only first time when the app is installed? The next time Camera should already be allowed

[@refugiocamarenasainz]

I tried to make the app, but had an error Unresolved reference: scanner_view Any sugestion ?

[@littlenosydragon1754]

class MainActivity : AppCompatActivity() { ... private lateinit var scanner_view: CodeScannerView private lateinit var tv_textview: TextView ... override fun onCreate(savedInstanceState: Bundle?) { ... tv_textview = findViewById(R.id.tv_textview) scanner_view = findViewById(R.id.scanner_view) ...

[@rhenestayo5591]

i have the same proble with you sir

[@diegosilva1683]

you have to add xmlns:app="schemas.android.com/apk/res-auto" on top

[@edwin2162]

@@littlenosydragon1754 thanks bro

[@musicalcoder7699]

@@littlenosydragon1754 Thank you - none of the other fixes listed were working for me!

[@davidepasero7032]

Congratulations for this excellent video. Exactly what I needed! Bravo Bravo

[@deanbonsu3401]

Hey sei il migliore. I really enjoy your videos and you should do more kotlin tutorials. I just learned java and watching your videos kotlin makes so much more sense. Is there anyway to brighten the codescanner view? I have noticed that the camera preview is darker than my normal camera preview. You just gained a fan !!

[@Indently]

Mi rende molto felice sentire che i miei video ti hanno aiutato a capire meglio come funzionano le cose :) Penso che puoi modificarlo nello XML file che lo contiene. Ma non sono troppo sicuro.

[@jasferducusin8672]

Very straightforward! Thank you so much

[@parchez11]

Oh my God, thanks thanks thanks!!!!!!!! U give me solution that i seek for 3 days. THANKS!

[@スヘア]

Such a great tutorial. Thank you so much

[@jeromelabsan1428]

can I use this in the latest android studio? it seems the code you are typing gets red in mine

[@txrav8517]

i have question how to make the scanner automatically go to the link that benn scanned in the app without showing url in the textview

[@deanwalker3956]

First, thank you for teaching this. This is really much appreciated. But I have a question. The scanner continuously scans barcodes. Example, I scan barcode A, and while the scanner is pointed at the code, it still keeps scanning. So, the scanner pointing at the barcode for 3 seconds results in dozens and dozens of scanning of the same barcode.. How can I make it so that after scanning a barcode once, the scanner stops? EDIT: I figured it out. What I did was this: Create two variables. newCode and prevCode. Scan the code. Assign the new code to newCode. if (newCode != prevCode), proceed. prevCode = newCode else, do something.

[@saidfeki908]

Hi dean can you upload a pic of your code and share it with us. Thank you

[@bryonic7611]

if anyone has a problem with scanner_view not being recognized you can solve this pretty easily by inserting { id 'kotlin-android-extensions' } in the plugins section of the app build.gradle and then import on the mainactivity file { import kotlinx.android.synthetic.main.activity_main.* } Hope this helps someone

[@cr3amyn3ll66]

It did, thank you very much!

[@arma3053]

im trying to import the { import kotlinx.android.synthetic.main.activity_main.* } in to mainactivity, yet i can't get it to work. I get an error and the scanner is still not poping up in the activity_main file.

[@jamesbrianvillar8210]

@@arma3053 same

[@Loulilta]

I try it but it doesn't work ?

[@Loulilta]

​@@arma3053 did you find a solution ?

[@harshbhanushali9944]

i got error intv_tevtview and scanner_view what to do plzz tell

[@abhishekpurohit8867]

Thanks a lot for this video. It's very helpful

[@TypicallyThomas]

This won't work for me. It keeps telling me I have unresolved references when referencing the ID's in the XML file

[@gmiampec]

I am facing the same problem? Have you got the answer?

[@TypicallyThomas]

@@gmiampec nope

[@movimientoenelespacio]

Amazing ! Now how can I get product informations from this scanned barcode. I saw few database API for this. But how to implement them ?

[@movimientoenelespacio]

Good Tutorial ! But I've got an issue : Unresolved reference: scanner_view. Can you help me out? Thank you

[@movimientoenelespacio]

My apologies it was my mistake. Awesome tutorial !

[@dxxxlan]

I have the same problem, what did you fix?

[@sqrpro5318]

how did you fix it please help

[@timminator555]

@@movimientoenelespacio How did you fix it?

[@johnwilkesbooth8000]

@@timminator555 have you find the error ?

[@Yxnder]

Welp, seems like Kotlin android extension was disabled later in 2020 and referencing activity xml elements to kt files is no longer possible :( Anyone have a way around this?

[@syedsuhaibzia1558]

I got an error at 5:17 it says scanner_view is unresolved reference what should i do please

[@syedsuhaibzia1558]

@Rafif Rabbani yup thank you that was the error. i solved it

[@MrSlaaron50]

totaly new to android studio, your tutorial works perfectly! Can we send this variable throught bluetooth to populate any text box in windows like a keyboard insert? simply ?

[@dailyseedpodcast]

Love the the content, but can you help me out When I add the Code Scan View to Frame Layout it doesn't recognize it even after adding dependency. Thank you

[@ghost_wasabi]

Thanks for the tutorial. However, the flash functionality doesn't seem to work on mine... can you help?

[@fernandogarciabarrera8699]

Good video Does the flashlight work?

[@Indently]

If your phone has a flash light, it will work.

[@FabianFlorezColombia]

How can I... Scan code QR and Load this Code Qr (URL) into WebView... or External Explorer... ??? Can U helpme??

[@farhan-momin]

hi in 2024 im adding this same feature to the app for my project!

[@eduardlipnitskiy6595]

Thank You! It works well and fast. But only when my camera far from QR. Is it possible to adjust the distance?

[@ZtowhyA]

wrong orientation for me. how do we resolved this?

[@Noway213-h3i]

hey dude how can i fix the unsolved reference scannerview and tv_textview?

[@gmiampec]

Have you got the answer? I am facing the same problem

[@HeikoGenti96]

same. do u fix?

[@apoorvjain72]

i tried making your code scanner in a fragment, can you help me find out why i am unable to scan in the fragment and also a way to make it working in a fragment

[@yavuzaksahin9621]

me to

[@coderschannel4270]

for me no errors but when i try running the apps no information appears on the screen. why?

[@flon7400]

thanks you for the tuto ! Why my cam is not working ? Instead of turn on my cam it takes the environment of the simulation ...

[@nurulaulia4579]

can this be stored in the database??

[@waltoncharles8972]

Is he doing it in Kotlin or Java? sorry I am new to this and am learning and don't want to follow the instructions incorrectly

[@dxxxlan]

He's using Kotlin

[@waltoncharles8972]

@@dxxxlan ty mate

Thanks bro, you're the best!

[@Jberv]

I tried this library, just found it on github but one thing i noticed, it is slow to scan, sometimes it takes 2 to 3 mins, unlike integration from other libraries, anyways nice video!

[@Loulilta]

Can i ask you i have problem whan i add the scanner view

[@sirhades356]

Can I use this on transferring activities when a QR code is scanned?

[@daytonatecfarheen2333]

Hi can u plz help. I keep seeing a black screen when I go back and start the app again. I'm failing to understand what's wrong. This usually happens with higher android version. Thanks!

[@Indently]

Read your error messages in the console

[@dare6437]

How i relate activity_main.xml and MainActovity.kt files?

[@nicolewhittaker9013]

how did you do it can you share with me , thank you

[@Indently]

Hello! I explain everything in the video. Have a nice day!

[@ddlam2]

I am working on the Android 10 API 29 project but there is no Activity_main.xml. Any idea would be appreciated.

[@3dgiftz]

Whther this scanner needs internet??

[@theuniversetraveller]

In the latest version of Android Studio textview.text = it.text comes back as an error, only expressions are allowed. I've tried copying the Kt code from Github DIrectly, but it uses Toast and .show actions that are not recognized as well. Total Newbie here. Any suggestions?

[@Loulilta]

It doesn't work with me in xml the scanner view any help ?

[@BTAndroid]

Hey you.. Why my Android 8.1.0 Imin device, can't scan. please help me

[@rhenestayo5591]

Can you please help me with this error MainActivity.xml = Unresolved reference: scanner_viewer. I already declare scanner_viewer on activity_main.xml. But it doesnt appear . Thanks in advance.

[@ponapple]

Add this to build.gradle under plugins id ‘kotlin-android-extensions’

[@guyus5469]

@@ponapple thanks mate!

[@bobyschnackler6914]

@@ponapple thank you kind sir

[@timminator555]

@@ponapple It doesn'nt work. It also says Unsolved reference: tv_textView. And Variable expected in this line: tv_textView.text = it.text.

[@airilsra]

@@timminator555 it works for me, though.

[@ryanvalcorza3363]

AAPT: error: not well-formed (invalid token).

[@charliecliforddevilla7836]

Why does my id "scanner_view" need to add local variable or parameter even though I declare it in the activity main

[@sqrpro5318]

did you solve the issue? please help me im stuck

[@yyzuus]

If you're solved plz help me out.

[@mattileazarelenquiblat]

What Language did you use?

[@minhajisminhaj]

English 😐

[@jamesbrianvillar8210]

The Code scanner in activy_main I can't find it

[@KhressieVlog]

nice video, can you help me fix this problem "Camera initialization error: failed to connect to camera service using android studio kotin language" that's the error when opening the camer of my virtual device

[@kartikmalhotra3551]

I am getting the same error, have you resolved it?

[@inaayat4193]

@@kartikmalhotra3551 me too, how can I?

[@kartikmalhotra3551]

@@inaayat4193 github code is incomplete watch the video and code, then it will work👍

[@inaayat4193]

@@kartikmalhotra3551 i succeeded, camera permissions should be enabled in settings

[@ryanvalcorza3363]

please help me on my error AAPT: error: not well-formed (invalid token).

[@Indently]

invalid token

[@phisitxayphommachan4166]

how to setupPermissions function in java please help

[@boswaki4]

working good tutorial

[@wiz8370]

At 5:18 codeScanner = CodeScanner(context:this, scanner_view) I don't get scanner_view It shows it as an error This is my first ever android project, I could really use some help

[@wiz8370]

SOLUTION: In build.gradle(.app) Add another pluggin id 'kotlin-android-extentions' This should fix the issue

[@charliecliforddevilla7836]

@@wiz8370 doens't fix the issue, idk why. I already checked the id on design, still red same with tv_textView

[@sqrpro5318]

@@charliecliforddevilla7836 did you fix it? if yes i want to know how

[@khanhsb15]

Thanks a lot !

[@helakajayakody2853]

Hello, can you teach us how to scan only specific type of qr codes like whats app do

[@thiviyakannathazan]

sir, how to save the details?

[@Indently]

Use local storage or cloud database

[@thiviyakannathazan]

@@Indently if using firebase how to implement in the code sir. Pls help me

[@Indently]

Create unique user id and insert data

[@thiviyakannathazan]

@@Indently sir u have any related video? So its easy for me to refer

[@gouravdadhich1332]

osm brother thankyou so much

[@williamtapeyim1226]

Hello, I'm kinda new to mobile development...and I have a concern that I'd like someone to explain to me please. My concern is this: I sometimes use applications capable of solving mathematical equations by simply filming on a notebook or a support (I am not interested in the mathematical part 😅) I would just like to know how and with which instruction (C#, .net ...I don't really know) we retrieve the equation written on the notebook through the camera... And I would also like to know if it's possible to create an application that communicates with offline software (like bluetooth...) thank you!

[@ashishgautam2842]

great work

[@jingquankueh564]

What if I want to go to a new Activity after scanning a barcode (passing the value along with it) ? Help is appreciated.

[@Indently]

It is the same process as sending a value to any new activity

[@StefanSoyka]

Oddly, I had to add kotlin-android-extensions before I was able to import or reference any view from the code. Oddly, because during it tells me to remove it and use the kotlin-parcelize plugin (Studio 4.2.1)

[@giannhsroussas5324]

If i scan a barcode an item has then will it show me its price??

[@Indently]

If you program it to do so.

[@jaysonverzon172]

do u have for java version?

[@Indently]

yes

[@jaysonverzon172]

@@Indently can I get a copy?

[@grampygamer8584]

Trying the Kotlin route in Android Studio I get Unresolved reference:int any ideas?

[@grampygamer8584]

Resolved

[@wiz8370]

I have the same error What's the solution for this?

[@trevorPhillips284]

how can someone create dependency like that? I mean how all this works in the background?

[@Indently]

Hi Shobhit, unfortunately I can't answer that. You would have to do a bit of research on Google for that.

[@akagrawal85]

flash light not working...why?

[@robinb.905]

Doesn't work anymore. I've got A LOT of errors, compilation fails, references to the textView and scannerView are missing... Android Studio is really a PAIN IN THE A** and the WORST IDE ever made

[@ApryMadonaSihaloho]

How i can get custom barcode?

[@Indently]

Type it in your search engine

[@arma3053]

hi thanks for the video, i could use some help. The code scanner line is not poping up nomater waht i do( this is literally my first time using Android Studio). Can anyone help me?

[@54M1WUL]

duz it wrk with barcodes in supermarkets?

[@Indently]

maybe, but maybe not

[@54M1WUL]

@@Indently why not?

[@Indently]

@@54M1WUL No reason, or maybe there are many

[@54M1WUL]

@@Indently i wanted to make an app wher it can scan the barcodes of supernarket items, to see if the user has the correct budget

[@Indently]

@@54M1WUL have you tried scanning a barcode?

[@loisejaymhoralfarero7792]

i cant view the QR code scanner PLSS help me

[@mustafaammar551]

Thank you bro

[@Indently]

np bro

[@andrefbillette2774]

Great video

[@JayaramGS]

How to clear the bug... java.lang.RuntimeException: Failed to connect the camera service

[@Indently]

With lots of love and research on Google

[@JayaramGS]

Bug fixed..❤️

[@ChrisChanSajelan]

How did you fixed it?

[@ghaithmuhammed279]

Is there code for scaning values like number

[@Indently]

probably

[@ghaithmuhammed279]

Thank you And recylerview image with text firebase

[@EasyTrickSG]

this scanner can browse web link///??

[@Indently]

sure

[@lzzpigeonclockingsystem7991]

Java?

[@Indently]

Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let application developers write once, run anywhere (WORA),[17] meaning that compiled Java code can run on all platforms that support Java without the need for recompilation.

[@lzzpigeonclockingsystem7991]

yeh i mean. i need tutorial for java. thanks.

[@Indently]

W3school is a great place to learn Java: www.w3schools.com/java/

[@lzzpigeonclockingsystem7991]

tutorial on java, how to implement this code scanner?

[@Indently]

​@@lzzpigeonclockingsystem7991 Ah, you should have said so earlier! Just learn Kotlin.

[@N00004]

Great job

[@inzealinfotech9830]

flash light not working

[@LabGecko]

Shame it uses a 3rd party code scanner instead of something like Google's. Yes, it looks like it works, but what else is that library importing or doing in the background? I don't have time to research it. As for the video, great job on the tutorial.

[@farhan-momin]

its opensource

[@adolphweissman5973]

is there a java for this one? if there is, can someone help me? im not familiar with kotlin yet

[@leandrosistemavs1043]

excelent!!

[@anesboubaker3088]

THANK YOU BRO

[@GSS-n4u]

java tutorial?

[@Indently]

No, I recommend learning Kotlin

[@farhan-momin]

hi in 2024 im making this project in java with help of chatgpt to trancode kotlin in this tutorial to java

[@sohamahmoud1324]

this code make the app scan any qr code how can i make the app scan uniqe qr code ?!

[@Indently]

Make the content of the QR code a secret code, and add an if/when statement that uses that code to display whatever you want to display

[@johnwilkesbooth8000]

Why can't we make payment ?

[@Indently]

Payment to who?

[@giovannidenti4607]

Salve, bel video. Peccato che dia gli errori che molti utenti ti hanno chiesto di spioegare. Ma non so perche non hai risposto neppure a un' utente. Questo errore lo da anche a me "Unresolved reference: scanner_view :21) . Ho ricontrollato piu volte l' id e ho anche provato a cambiarlo sia nell activity_main che nel MainActivity, ma non cambia niente. L' errore rimane. Sarebbe bello sentire come si puo risolvere. Grazie e ancora complimenti

[@Indently]

Ciao Giovanni! Scusa che non posso rispondere a tutte le domande... questo e' solo un hobby e devo lavorare per fare la mia vita qua a Copenaghen. Riguardando tuo errore, devi ricercare Kotlin Synthetics Deprecation su Google, perché adesso non possiamo più solo scrivere il "reference" senza Kotlin Synthetics, che e' stato deprecated. Grazie e buona giornata!

[@giovannidenti4607]

@@Indently Ciao e grazie per avermi risposto. Io ho provato piu volte a implementare il tuo codice ma non riesco a risolvere l' errore di cui ti ho parlato. Visto che tu hai implementato il codice potresti dirmi come risolverlo quando hai 2 minuti di tempo? Grazie ancora 👍💪

[@giovannidenti4607]

@@Indently Scusa non avevo letto tutto il tuo messaggio. Grazie del suggerimento e buona giornata 😀

[@mihaelisaev]

So android developers can't scan QR/barcodes easily in two lines of code without any libs? Can't find any tutorial which doesn't use some shitty libraries.

[@Indently]

I hope you understand the complexity involved into breaking down images into to bytes, and converting them into some sort of format that our phone can understand. This library saves us a lot of time.

[@mihaelisaev]

@@Indently yup, I'm just from the swift world where everything is 100x times easier.

[@mihaelisaev]

@@Indently ok, I implemented it with CameraX+ZXing and JetPack Compose.

[@hk-four-sixteen]

The best tutorial that deserve more likes. +1 subscribe for a Very useful tutorial 😍

[@ahmetaykilic8119]

Thanks a lot, it worked. This application uses the phone's back camera. But I have to use a selfie (front) camera. Is it possible? How can I do? Please, Help me...

[@ahmetaykilic8119]

OK, I solved :) I added this code; integrator.addExtra("SCAN_MODE", "QR_CODE_MODE"); integrator.addExtra("SCAN_CAMERA_ID", 1); // front (selfie) camera integrator.addExtra("SCAN_CAMERA_ID", 0); // back camera

[@rexang980]

@@ahmetaykilic8119 Where did you add the code?

[@DamayitaDas]

Спасибо, только твой код помог 🙂 Но фонарик всё равно не работает

[@marcielribeiro4949]

camera black

[@KhressieVlog]

please notice my comment Code Palace