Bar Code & QR Code Scanner

Bar Code & QR Code Scanner is used to scan BAR & QR code scanning. you can see it in this tutorial.

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Steps to use Bar Code & QR Code Scanner in your project.

1. Crate a project(Bar Code & QR Code Scanner Demo) in android studio.
   
   
2. Create a Activity build.gradle and add a dependency to it- 
   
   

   // add dependency to use QR code scanning
   compile 'com.journeyapps:zxing-android-embedded:3.4.0'
   
   

   
   
3. Now your build.gradle will be like-
   

   apply plugin: 'com.android.application'
   android {
       compileSdkVersion 26
       defaultConfig {
           applicationId "com.pankaj.barcodedemo"
           minSdkVersion 15
           targetSdkVersion 26
           versionCode 1
           versionName "1.0"
           testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
       }
   
       buildTypes {
           release {
               minifyEnabled false
               proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
           }
       }
   }
   
   dependencies {
       implementation fileTree(dir: 'libs', include: ['*.jar'])
       implementation 'com.android.support:appcompat-v7:26.1.0'
       implementation 'com.android.support.constraint:constraint-layout:1.0.2'
       implementation 'com.android.support:design:26.1.0'
       testImplementation 'junit:junit:4.12'
       androidTestImplementation 'com.android.support.test:runner:1.0.1'
       androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
       // add dependency to use QR code scanning
       compile 'com.journeyapps:zxing-android-embedded:3.4.0'
   }

    
4. Create a activity MainActivity.Java and update it-
   
   
   

   package com.pankaj.barcodedemo;
   import android.content.Intent;
   import android.os.Bundle;
   import android.support.design.widget.FloatingActionButton;
   import android.support.v7.app.AppCompatActivity;
   import android.util.Log;
   import android.view.View;
   import android.widget.TextView;
   import android.widget.Toast;
   import com.google.zxing.integration.android.IntentIntegrator;
   import com.google.zxing.integration.android.IntentResult;
   
   public class MainActivity extends AppCompatActivity {
       private IntentIntegrator qrScan;
   
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
   
   //      initialize
           qrScan = new IntentIntegrator(this);
   
           //Specify scanning type like QR/Barcode. Default its scan both type.
   //      qrScan.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
           //Add message to show when scannig
           qrScan.setPrompt("Scan a Barcode/QR Code");
   
           // Use a specific camera of the device
           qrScan.setCameraId(0);
   
           //enable beep on scan complete
           qrScan.setBeepEnabled(true);
           qrScan.setBarcodeImageEnabled(true);
           FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
   
           fab.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View view) {
                   //open scanner
                   qrScan.initiateScan();
               }
           });
       }
   
       //Getting the scan results
       @Override
       protected void onActivityResult(int requestCode, int resultCode, Intent data) {
           IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
           if (result != null) {
   
               //if qrcode has nothing in it
               if (result.getContents() == null) {
                   Toast.makeText(this, "Result Not Found", Toast.LENGTH_LONG).show();
               } else {
                   try {
   
                       //if qr contains data
                       ((TextView) findViewById(R.id.tvScanData)).setText(result.getContents());
                       Log.e("scan result", result.getContents());
                   } catch (Exception e) {
                   }
               }
           } else {
               super.onActivityResult(requestCode, resultCode, data);
           }
       }
   }
   

    
5. Create a xml activity_main.xml and update it-
   
   
   

   <?xml version="1.0" encoding="utf-8"?>
   <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto"
       xmlns:tools="http://schemas.android.com/tools"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       tools:context="com.pankaj.barcodedemo.MainActivity">
   
       <android.support.design.widget.AppBarLayout
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:theme="@style/AppTheme.AppBarOverlay">
   
           <android.support.v7.widget.Toolbar
               android:id="@+id/toolbar"
               android:layout_width="match_parent"
               android:layout_height="?attr/actionBarSize"
               android:background="?attr/colorPrimary"
               app:popupTheme="@style/AppTheme.PopupOverlay" />
       </android.support.design.widget.AppBarLayout>
   
       <LinearLayout
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:gravity="center"
           app:layout_behavior="@string/appbar_scrolling_view_behavior"
           tools:showIn="@layout/activity_main">
           <TextView
               android:id="@+id/tvScanData"
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:autoLink="web"
               android:text="Scan result will show here." />
       </LinearLayout>
   
       <android.support.design.widget.FloatingActionButton
           android:id="@+id/fab"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_gravity="bottom|end"
           android:layout_margin="@dimen/fab_margin"
           app:srcCompat="@android:drawable/ic_menu_camera" />
   
   </android.support.design.widget.CoordinatorLayout>
   

    
6. If you want to open it in only in one mode like landscape or portrait then add below code to manifest
   
   
   

   <activity
       android:name="com.journeyapps.barcodescanner.CaptureActivity"
       android:screenOrientation="portrait"
       tools:replace="screenOrientation" />

    
   
   
   

   
   
7. All the application development process with Bar Code & QR Code Scanner has completed, Now run the app and look the screen.
   
    
8. Now click on camera button to open scanner.
   
   
   
   
   
    
9. 
   

   Now scan the QR or BAR code and see the result.

   
   
   
   
   

   
   

   
   

   
   

   
   
10. Good bye, Thanks to read this blog.
    
    

    
    

    
    

    Download Demo