Using QRCodeReaderView based on Zxing
suggest changeQRCodeReaderView implements an Android view which show camera and notify when there’s a QR code inside the preview.
It uses the zxing open-source, multi-format 1D/2D barcode image processing library.
Adding the library to your project
Add QRCodeReaderView dependency to your build.gradle
dependencies{
compile 'com.dlazaro66.qrcodereaderview:qrcodereaderview:2.0.0'
}
First use
- Add to your layout a
QRCodeReaderView
<com.dlazaro66.qrcodereaderview.QRCodeReaderView
android:id="@+id/qrdecoderview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
- Create an Activity which implements
onQRCodeReadListener
, and use it as a listener of theQrCodeReaderView
. - Make sure you have camera permissions in order to use the library. (https://developer.android.com/training/permissions/requesting.html)
Then in your Activity, you can use it as follows:
public class DecoderActivity extends Activity implements OnQRCodeReadListener {
private TextView resultTextView;
private QRCodeReaderView qrCodeReaderView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_decoder);
qrCodeReaderView = (QRCodeReaderView) findViewById(R.id.qrdecoderview);
qrCodeReaderView.setOnQRCodeReadListener(this);
// Use this function to enable/disable decoding
qrCodeReaderView.setQRDecodingEnabled(true);
// Use this function to change the autofocus interval (default is 5 secs)
qrCodeReaderView.setAutofocusInterval(2000L);
// Use this function to enable/disable Torch
qrCodeReaderView.setTorchEnabled(true);
// Use this function to set front camera preview
qrCodeReaderView.setFrontCamera();
// Use this function to set back camera preview
qrCodeReaderView.setBackCamera();
}
// Called when a QR is decoded
// "text" : the text encoded in QR
// "points" : points where QR control points are placed in View
@Override
public void onQRCodeRead(String text, PointF[] points) {
resultTextView.setText(text);
}
@Override
protected void onResume() {
super.onResume();
qrCodeReaderView.startCamera();
}
@Override
protected void onPause() {
super.onPause();
qrCodeReaderView.stopCamera();
}
}
Found a mistake? Have a question or improvement idea?
Let me know.
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