#QREader

Android library using google's mobile vision api to read QR Code

#Integration

• QREader is available in the MavenCentral, so getting it as simple as adding it as a dependency

compile 'com.github.nisrulz:qreader:1.0.3'

#Usage

• First add a SurfaceView to your layout and give it an id

<SurfaceView
        android:id="@+id/camera_view"
        android:layout_width="320dp"
        android:layout_height="320dp"/>

• Then in your Activity code reference the SurfaceView

SurfaceView surfaceView = (SurfaceView) findViewById(R.id.camera_view);

• Next setup the config with QRDataListener as the last argument in any of the setConfig() calls

  • The default config uses autofocus, back camera and preview size set at 800x800 and is referenced as below

  QREader.getInstance().setUpConfig(new QRDataListener() {
          @Override
          public void onDetected(final String data) {
              Log.d("QREader", "Value : " + data);
              
              // Post data on UI Thread
              textView_qrcode_info.post(new Runnable() {
                  @Override
                  public void run() {
                      textView_qrcode_info.setText(data);
                  }
              });
          }
      });

  • There are other config methods to give you more granular configurations

  // Disable/Enable autofocus
  // Choose between Front facing or Back facing camera | Possible arguments : CameraSource.CAMERA_FACING_BACK /  CameraSource.CAMERA_FACING_FRONT
   public void setUpConfig(boolean autofocus_enabled, int facing, QRDataListener qrDataListener) {
  // Change all the config values
   public void setUpConfig(boolean autofocus_enabled, int width, int height, int facing, QRDataListener qrDataListener) {

• Call QREader.getInstance().init() with required arguments in your Activity code, to start reading QR code.

QREader.getInstance().init(this, surfaceView);

where

• To start QR code detection

QREader.getInstance().start();

• To stop QR code detection

QREader.getInstance().stop();

• To releaseAndCleanup by QREader

QREader.getInstance().releaseAndCleanup();

NOTE :

1. The library uses android.permission.CAMERA permission implicitly. For Android platforms Marshmallow and above you need to make sure the permission is requested during
   runtime and granted for QREader to function.

2. The onDetected(final String data) function call returns the data string on a different thread, so in order for you to show the result on the main thread you need to use a handler.

P.S : You can use this nice QR Code generator to test.

Copyright 2016 Nishant Srivastava

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.