Integrate ZXing in Android Studio

Question

I ll start explaining all the steps I have done and in the end what is the problem    Download ZXing-2 2 https   code google com p zxing downloads list Extrac all in zxing-2 2  Download and install Apache Ant http   www youtube com watch v XJmndRfb1TU With the use of Windows Commandline  Run- CMD  navigate to the extracted directory In the commandline window - Type  ant -f core build xml  press enter and let Apache work it s magic    At this moment is like Integrating the ZXing library directly into my Android application  But Wooops   Buildfile  core build xml does not exists  Build failed  ok   6  Importing ZXing - missing core build xml  Now yes  i have my core jar    Open Android Studio  File -  Import Project -  Select  android  in  zxing-2 2  -  Create project from existing sources -  Project name  andoid -  Source files for    all checked Next -  Libraries  cant do nothing  Next -  Modules  android checked  Next -  SDK 1 7 Next -  Finish   With Project Open -  Build -  Rebuild project  100 errors 19 warnings  File -  project Structure -  Libraries -  Add -  Java -  Select core jar that i create before and OK -  Library  core  will be added to the selected modules   android  OK -  And OK in the Project Structure Dialog   Build -  Rebuild Project  15 errors 20 warnings  All errors are error  constant expression required and  I see Error in Switch cases of ZXing project in android  I change all switchs for if elses   0 errors 20 warnings  Ok  now continue   File -  New project -  zxing demo Next -  Next -  Blank Activity Next -  Finish  In new project -  File -  Import module -  Search and select  android  OK -  Create module from existing sources Next -   Next -  Next -  Next -  Finish  Now I can see in the explorer  android   zging demoProject  and External Libraries  Now i change my code tu scan QR  AndroidManifest xml   lt  xml version  1 0  encoding  utf-8   gt   lt manifest xmlns android  http   schemas android com apk res android  package  com example zxing demo  android versionCode  1  android versionName  1 0   gt    lt uses-sdk     android minSdkVersion  7      android targetSdkVersion  16    gt   lt uses-permission android name  android permission CAMERA   gt   lt uses-feature android name  android hardware camera    gt   lt uses-feature     android name  android hardware camera autofocus      android required  false    gt   lt uses-feature     android name  android hardware touchscreen      android required  false    gt   lt application     android allowBackup  true      android icon   drawable ic launcher      android label   string app name      android theme   style AppTheme   gt       lt activity         android name  com example zxing demo MainActivity          android label   string app name   gt           lt intent-filter gt               lt action android name  android intent action MAIN    gt                lt category android name  android intent category LAUNCHER    gt           lt  intent-filter gt       lt  activity gt       lt activity         android clearTaskOnLaunch  true          android stateNotNeeded  true          android configChanges  orientation keyboardHidden          android name  com google zxing client android CaptureActivity          android screenOrientation  landscape          android theme   android style Theme NoTitleBar Fullscreen          android windowSoftInputMode  stateAlwaysHidden   gt           lt intent-filter  gt               lt action android name  android intent action MAIN    gt               lt category android name  android intent category DEFAULT    gt           lt  intent-filter gt           lt intent-filter  gt               lt action android name  com google zxing client android SCAN    gt               lt category android name  android intent category DEFAULT    gt           lt  intent-filter gt       lt  activity gt   lt  application gt      MainActivity java  package com example zxing demo   import android app Activity  import android content Intent  import android os Bundle   public class MainActivity extends Activity     Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main       Intent intent   new Intent  com google zxing client android SCAN        intent putExtra  SCAN MODE    QR CODE MODE        startActivityForResult intent  0       public void onActivityResult int requestCode  int resultCode  Intent intent        if  requestCode    0            if  resultCode    RESULT OK                String contents   intent getStringExtra  SCAN RESULT                String format   intent getStringExtra  SCAN RESULT FORMAT                   Handle successful scan           else if  resultCode    RESULT CANCELED                   Handle cancel                        Now test  Run -  Debug  And CRASH   Logcat  08-31 02 58 28 085  20665-20665 com example zxing demo E AndroidRuntime  FATAL EXCEPTION  main     java lang RuntimeException  Unable to instantiate activity ComponentInfo com example zxing demo com google zxing client android CaptureActivity   java lang ClassNotFoundException  com google zxing client android CaptureActivity     at android app ActivityThread performLaunchActivity ActivityThread java 1891      at android app ActivityThread handleLaunchActivity ActivityThread java 1992      at android app ActivityThread access 600 ActivityThread java 127      at android app ActivityThread H handleMessage ActivityThread java 1158      at android os Handler dispatchMessage Handler java 99      at android os Looper loop Looper java 137      at android app ActivityThread main ActivityThread java 4448      at java lang reflect Method invokeNative Native Method      at java lang reflect Method invoke Method java 511      at com android internal os ZygoteInit MethodAndArgsCaller run ZygoteInit java 823      at com android internal os ZygoteInit main ZygoteInit java 590      at dalvik system NativeStart main Native Method      Caused by  java lang ClassNotFoundException  com google zxing client android CaptureActivity     at dalvik system BaseDexClassLoader findClass BaseDexClassLoader java 61      at java lang ClassLoader loadClass ClassLoader java 501      at java lang ClassLoader loadClass ClassLoader java 461      at android app Instrumentation newActivity Instrumentation java 1023      at android app ActivityThread performLaunchActivity ActivityThread java 1882          11 more   I can see in AndroidManifest xml in this line  android name  com google zxing client android CaptureActivity     CaptureActivity  in red and the error say  Cannot resolve symbol  CaptureActivity   File -  Project Structure -  Modules -  zxing demo -  Dependencies -  Add -  Module dependency -  android OK -  Apply and OK  Now CaptureActivity looks good  Debug again  08-31 03 06 58 513  21740-21740 com example zxing demo E AndroidRuntime  FATAL EXCEPTION  main     java lang RuntimeException  Unable to instantiate activity ComponentInfo com example zxing demo com google zxing client android CaptureActivity   java lang ClassNotFoundException  com google zxing client android CaptureActivity     at android app ActivityThread performLaunchActivity ActivityThread java 1891      at android app ActivityThread handleLaunchActivity ActivityThread java 1992      at android app ActivityThread access 600 ActivityThread java 127      at android app ActivityThread H handleMessage ActivityThread java 1158      at android os Handler dispatchMessage Handler java 99      at android os Looper loop Looper java 137      at android app ActivityThread main ActivityThread java 4448      at java lang reflect Method invokeNative Native Method      at java lang reflect Method invoke Method java 511      at com android internal os ZygoteInit MethodAndArgsCaller run ZygoteInit java 823      at com android internal os ZygoteInit main ZygoteInit java 590      at dalvik system NativeStart main Native Method      Caused by  java lang ClassNotFoundException  com google zxing client android CaptureActivity     at dalvik system BaseDexClassLoader findClass BaseDexClassLoader java 61      at java lang ClassLoader loadClass ClassLoader java 501      at java lang ClassLoader loadClass ClassLoader java 461      at android app Instrumentation newActivity Instrumentation java 1023      at android app ActivityThread performLaunchActivity ActivityThread java 1882          11 more   I think I will use the application and intents  but now I want do this work  if someone now whats happen tell me please

User · Answer

this tutorial help me to integrate to android studio: http://wahidgazzah.olympe.in/integrating-zxing-in-your-android-app-as-standalone-scanner/ if down try THIS

just add to AndroidManifest.xml

<activity
         android:name="com.google.zxing.client.android.CaptureActivity"
         android:configChanges="orientation|keyboardHidden"
         android:screenOrientation="landscape"
         android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
         android:windowSoftInputMode="stateAlwaysHidden" >
         <intent-filter>
             <action android:name="com.google.zxing.client.android.SCAN" />
             <category android:name="android.intent.category.DEFAULT" />
         </intent-filter>
     </activity>

Hope this help!.

User · Answer

I was integrating ZXING into an Android application and there were no good sources for the input all over  I will give you a hint on what worked for me - because it turned out to be very easy   There is a real handy git repository that provides the zxing android library project as an AAR archive    https   github com journeyapps zxing-android-embedded   All you have to do is add this to your build gradle  repositories       jcenter      dependencies       implementation  com journeyapps zxing-android-embedded 3 0 2 aar      implementation  com google zxing core 3 2 0      and Gradle does all the magic to compile the code and makes it accessible in your app   To start the Scanner afterwards  use this class method  From the Activity   new IntentIntegrator this  initiateScan        this  is the current Activity   From a Fragment   IntentIntegrator forFragment this  initiateScan        this  is the current Fragment    If you re using the support library  use IntentIntegrator forSupportFragment this  instead    There are several customizing options   IntentIntegrator integrator   new IntentIntegrator this   integrator setDesiredBarcodeFormats IntentIntegrator ONE D CODE TYPES   integrator setPrompt  Scan a barcode    integrator setCameraId 0       Use a specific camera of the device integrator setBeepEnabled false   integrator setBarcodeImageEnabled true   integrator initiateScan      They have a sample-project and are providing several integration examples    AnyOrientationCaptureActivity ContinuousCaptureActivity CustomScannerActivity ToolbarCaptureActivity   If you already visited the link you going to see that I just copy amp pasted the code from the git README  If not  go there to get some more insight and code examples

User · Answer

From version 4 x  only Android SDK 24  is supported by default  and androidx is required   Add the following to your build gradle file   repositories       jcenter      dependencies       implementation  com journeyapps zxing-android-embedded 4 1 0      implementation  androidx appcompat appcompat 1 0 2     android       buildToolsVersion  28 0 3     Older versions may give compile errors     Older SDK versions  For Android SDK versions  lt  24  you can downgrade zxing core to 3 3 0 or earlier for Android 14  support   repositories       jcenter      dependencies       implementation  com journeyapps zxing-android-embedded 4 1 0     transitive   false       implementation  androidx appcompat appcompat 1 0 2      implementation  com google zxing core 3 3 0     android       buildToolsVersion  28 0 3      You ll also need this in your Android manifest    lt uses-sdk tools overrideLibrary  com google zxing client android    gt    Source   https   github com journeyapps zxing-android-embedded

User · Answer

Anybody facing the same issues  follow the simple steps   Import the project android from downloaded zxing-master zip file using option Import project  Eclipse ADT  Gradle  etc   and add the dollowing 2 lines of codes in your app level build gradle file and and you are ready to run   So simple  yahh     dependencies              https   mvnrepository com artifact com google zxing core         compile group   com google zxing   name   core   version   3 2 1             https   mvnrepository com artifact com google zxing android-core         compile group   com google zxing   name   android-core   version   3 2 0           You can always find latest version core and android core from below links   https   mvnrepository com artifact com google zxing core 3 2 1 https   mvnrepository com artifact com google zxing android-core 3 2 0  UPDATE  29 05 2019   Add these dependencies instead   dependencies       implementation  com google zxing core 3 4 0      implementation  com google zxing android-core 3 3 0

User · Answer

buttion setOnClickListener new View OnClickListener                  Override             public void onClick View v                     new com google zxing integration android IntentIntegrator Fragment this  initiateScan                                   public void onActivityResult int requestCode  int resultCode  Intent data            IntentResult result   IntentIntegrator parseActivityResult requestCode  resultCode  data           if result    null                if result getContents      null                    Log d  MainActivity    Cancelled scan                    Toast makeText this   Cancelled   Toast LENGTH LONG  show                  else                   Log d  MainActivity    Scanned                    Toast makeText this   Scanned      result getContents    Toast LENGTH LONG  show                            else                  This is important  otherwise the result will not be passed to the fragment             super onActivityResult requestCode  resultCode  data                      dependencies       compile  com journeyapps zxing-android-embedded 3 2 0 aar      compile  com google zxing core 3 2 1      compile  com android support appcompat-v7 23 1 0

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