QR Reader based on Android Vision API

This is a small sample library that scans QR Codes using the new Mobile Vision API for Android included in latest release of Google Play Services, which allows you to avoid using external libraries.

Feel free to use this project as a small sample of how to use this API for scanning QR Codes and customize it however you want ;)

Integration instructions

Requirements

• Android SDK version 9 or later.

Setup

If you use gradle, then add the following dependency:

compile project(':AndroidVisionQRReader')

Or you can put the AndroidVisionQRReader.aar file inside libs directory and add the following dependency:

repositories {
    flatDir {
        dirs 'libs'
    }
}
dependencies {
    compile(name:'AndroidVisionQRReader', ext:'aar')
}

If you use something other than gradle, then:

1. Edit AndroidManifest.xml. We're going to add a few additional items in here:

   <uses-sdk android:minSdkVersion="9" />
   

2. Also in your <manifest> element, make sure the following permissions and features are present:

   <uses-permission android:name="android.permission.CAMERA" />
   
   <meta-data
       android:name="com.google.android.gms.vision.DEPENDENCIES"
       android:value="barcode" />
   

3. Within the <application> element, add activity entries:

   <!-- Activities responsible for scan QR code -->
   <activity android:name="com.gnzlt.AndroidVisionQRReader.QRActivity" />
   

Sample code (See the QRTest App for an example)

First, we'll assume that you're going to launch the request from a button, and that you've set the button's onClick handler in the layout XML via android:onClick="requestQRCodeScan". Then, add the method as:

public void requestQRCodeScan(View v) {
    Intent qrScanIntent = new Intent(this, QRActivity.class);
    startActivityForResult(qrScanIntent, QR_REQUEST);
}

Next, we'll override onActivityResult() to get the request result.

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == QR_REQUEST) {
            if (resultCode == RESULT_OK) {
                String qrData = data.getStringExtra(QRActivity.EXTRA_QR_RESULT);
                // do something with the QR data String
            } else {
                mResultTextView.setText("Error");
            }
        }
    }

License

    Copyright (C) 2015 Gonzalo Toledano

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.