Integrating ZXing-QR in your Android Application

Follow the steps to integrating ZXing-QRSCan in your app:

ZXing is one of the most popular barcode scanning applications on the market.

They make it very easy for you to integrate into your application

via an intent but this means that your users must manually install the application from the market.

Step 1:  Obtain the zxing source code:

    svn checkout https://code.google.com/p/zxing/source/checkout

      

      Also you can find the full source code at this url

     https://code.google.com/p/zxing/downloads/list

            https://github.com/zxing/zxing

     

Step 2 :  Build zxing core using Apache Ant:

 

      You will need to build the core project into a jar file using apache ant

    (download from here http://ant.apache.org/ivy/download.cgi).

      Using a shell or cmd prompt navigate to the root directory of

      the downloaded zxing src and execute “ant -f core/build.xml”.

      This will produce a file core/core.jar which

      we will use in the next step.  

Step 3:     Build ZXing Android using Eclipse:

     

      Create a New Android Project (File –> New –> Android Project).

      Set the project name to ZXing (or similar).

      Select the “Create project from existing source” radio button

      Click “Browse” and navigate to the android project that you downloaded from

      zxing  and click “OK” Select “Finish”

     

       The project will not currently build. We need to add the core.jar file (that we

  produced    in the previous step) into our project. Right-click on ZXing

  project –> properties –> Java Build Path –> Add External Jars –> Navigate to

  and select core.jar –> Open –> OK.

  Actually, while we’re here we should do one more very important thing!

  Right-click on ZXing project –> properties –> Android –> Scroll down and

  check/tick the “Is Library” checkbox –> OK

Step 4:     Include ZXing Android into your project.

 

      Within Eclipse,  Right-click on YOURPROJECTNAMEHERE project –>

      properties –>Android –> Scroll down to Libraries section –> Click Add –>

      Select ZXing (which should appear as an option as a result of completing

      previous step).

Source Code:

     

     

1. AndroidManifest.xml

   <?xml version="1.0" encoding="utf-8"?>

  <manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.androidpeoplesconnect.app"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <uses-permission android:name="android.permission.CAMERA" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:name=".QRCodeActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <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="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />

            </intent-filter>

            <intent-filter>

                <action android:name="com.google.zxing.client.android.SCAN" />

                <category android:name="android.intent.category.DEFAULT" />

            </intent-filter>

        </activity>

    </application>

  </manifest>

 

 

 

2. QRCodeActivity.java

 package com.androidpeoplesconnect.app;

import com.google.zxing.client.android.CaptureActivity;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class QRCodeActivity extends Activity {

 /** Called when the activity is first created. */

 Button b1;

 @Override

 public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);

  b1 = (Button) findViewById(R.id.submit);

  b1.setOnClickListener(new OnClickListener() {

   public void onClick(View arg0) {

    // TODO Auto-generated method stub

    Intent intent = new Intent(TestQRCodeActivity.this,

      CaptureActivity.class);

    // 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 == 1) {

    // Handle successful scan

    String capturedQrValue = intent.getStringExtra("RESULT");

    //String format = intent.getStringExtra("SCAN_RESULT_FORMAT");

    Toast.makeText(TestQRCodeActivity.this,

      "Scan Result:" + capturedQrValue, Toast.LENGTH_SHORT)

      .show();

   } else if (resultCode == RESULT_CANCELED) {

    // Handle cancel

   }

  } else {

  }

 }

}