QRCodeReaderView

Modification of ZXING Barcode Scanner project for easy Android QR-Code detection.

Usage

• Add a "QRCodeReaderView" in the layout editor like you actually do with a button for example.

• In your onCreate method, you can find the view as usual, using findViewById() function.

• Create an Activity which implements OnQRCodeReadListener, and let implements required methods or set a OnQRCodeReadListener to the QRCodeReaderView object

• Make sure you have camera permissions in order to use the library. (https://developer.android.com/training/permissions/requesting.html)

• Add the library to your module build.gradle

dependencies {
     implementation 'io.github.putme2yourheart:qrcodereaderview:1.0.0'
}

<io.github.putme2yourheart.qrcodereaderview.QRCodeReaderView
        android:id="@+id/QRCodeReaderView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

• Start & Stop camera preview in onPause() and onResume() overriden methods.

@Override
protected void onResume() {
    super.onResume();

    if (mQRCodeReaderView != null) {
        mQRCodeReaderView.startCamera();
    }
}

@Override
protected void onPause() {
    super.onPause();

    if (mQRCodeReaderView != null) {
        mQRCodeReaderView.stopCamera();
    }
}

• You can place ScannerCoverLayout or widgets or views over QRCodeReaderView.

<io.github.putme2yourheart.qrcodereaderview.ScannerCoverLayout
        android:id="@+id/ScannerCoverLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:corner_color="@color/corner_color"
        app:frame_color="@color/viewfinder_frame"
        app:label_text_color="@color/colorAccent"
        app:laser_color="@color/laser_color"
        app:mask_color="@color/viewfinder_mask"
        app:result_color="@color/result_view"
        app:result_point_color="@color/result_point_color">

        <!--The view above the scaning rectangle-->
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_centerHorizontal="true"
                android:layout_marginBottom="16dp"
                android:text="Scan QR code"
                android:textColor="#ffffff" />

        </RelativeLayout>

        <!--The view below the scanning rectangle-->
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/tv_flashlight"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:background="#20000000"
                android:gravity="center"
                android:paddingBottom="16dp"
                android:paddingTop="16dp"
                android:text="Open Flashlight"
                android:textColor="#ffffff"
                android:textSize="16sp" />

        </RelativeLayout>

    </io.github.putme2yourheart.qrcodereaderview.ScannerCoverLayout>

• Methods

    // Use this function to enable/disable decoding
    mQRCodeReaderView.setQRDecodingEnabled(true);
    
    // Use this function to change the autofocus interval
    mQRCodeReaderView.setAutofocusInterval(500L);
    
    // Use this function to set front camera preview
    mQRCodeReaderView.setFrontCamera();
    
    // Use this function to set back camera preview
    mQRCodeReaderView.setBackCamera();
    
    // Use this function to keep screen on
    mQRCodeReaderView.setKeepScreenOn(this, true);
    
    // Use this function to turn on sound and vibratioin
    mQRCodeReaderView.setBeepAndVibrate(true, true);
    
    // Use this function to enable/disable Torch
    mQRCodeReaderView.setTorchEnabled(true);

    // Must bind it if ScannerCoverLayout is used
    mQRCodeReaderView.touchScannerLayout(mScannerCoverLayout);
    
    // Called when a QR is decoded
    // "text" : the text encoded in QR
    mQRCodeReaderView.setOnQRCodeReadListener(this);

Libraries used in this project

• ZXING

Fork https://github.com/dlazaro66/QRCodeReaderView

License

Copyright 2018 putme2yourheart

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.