Android Barcode Reader library using Google Mobile Vision.
- Include the barcode reader dependency in app's build.gradle
dependencies {
// google vision gradle
implementation 'com.google.android.gms:play-services-vision:15.0.2'
}- You can just launch the scanner activity by calling this method
Intent launchIntent = BarcodeReaderActivity.getLaunchIntent(this, true, false);
startActivityForResult(launchIntent, BARCODE_READER_ACTIVITY_REQUEST);protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != Activity.RESULT_OK) {
Toast.makeText(this, "error in scanning", Toast.LENGTH_SHORT).show();
return;
}
if (requestCode == BARCODE_READER_ACTIVITY_REQUEST && data != null) {
Barcode barcode = data.getParcelableExtra(BarcodeReaderActivity.KEY_CAPTURED_BARCODE);
Toast.makeText(this, barcode.rawValue, Toast.LENGTH_SHORT).show();
}
}- If you want to make your own activity then implement your activity from
BarcodeReader.BarcodeReaderListenerand override the necessary methods.
public class BarcodeReaderActivity extends AppCompatActivity implements BarcodeReaderFragment.BarcodeReaderListener {
private BarcodeReaderFragment mBarcodeReaderFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_barcode_reader);
mBarcodeReaderFragment = attachBarcodeReaderFragment();
}
private BarcodeReaderFragment attachBarcodeReaderFragment() {
final FragmentManager supportFragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = supportFragmentManager.beginTransaction();
BarcodeReaderFragment fragment = BarcodeReaderFragment.newInstance(true, false);
fragment.setListener(this);
fragmentTransaction.replace(R.id.fm_container, fragment);
fragmentTransaction.commitAllowingStateLoss();
return fragment;
}
@Override
public void onScanned(Barcode barcode) {
}
@Override
public void onScannedMultiple(List<Barcode> barcodes) {
}
@Override
public void onBitmapScanned(SparseArray<Barcode> sparseArray) {
}
@Override
public void onScanError(String errorMessage) {
}
@Override
public void onCameraPermissionDenied() {
}
}In fragment the barcode reader can be added easily but the scanner listener barcodeReader.setListener() has to
be set manually.
Check the example fragment code in BarcodeFragment.java and MainActivity.java
The overlay animation indicator displays a horizontal line animating from top to bottom. This will be useful to to show some cool animation to indicate scanning progress.
To use it, add the com.notbytes.barcode_reader.ScannerOverlay on top of barcode reader fragment using Relative or Frame layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout ...>
<fragment
android:id="@+id/barcode_fragment"
android:name="com.notbytes.barcode_reader.BarcodeReaderFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:auto_focus="true"
app:use_flash="false" />
<com.notbytes.barcode_reader.ScannerOverlay
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#44000000"
app:line_color="#7323DC"
app:line_speed="6"
app:line_width="5"
app:square_height="250"
app:square_width="250" />
</RelativeLayout>
XML attribute for Barcode Reader
auto_focus - boolean, turn on/off auto focus. Default is true
use_flash - boolean, turn on/off flash. Default is false
XML attribute for Scanner Overlay Indicator
square_width - Width of transparent square
square_height - Height of transparent square
line_color - Horizontal line color
line_speed - Horizontal line animation speed
JAVA Methods
- Play beep sound
You can play the beep sound when the barcode is scanned. This code is usually called in onScanned() callback.
@Override
public void onScanned(final Barcode barcode) {
Log.e(TAG, "onScanned: " + barcode.displayValue);
barcodeReader.playBeep();
});
}- Change beep sound
You can change the default beep sound by passing the file name. You beep file should be in project's assets folder.
barcodeReader.setBeepSoundFile("shutter.mp3");- Pause scanning
The scanning can be paused by calling pauseScanning() method.
barcodeReader.pauseScanning();- Resume Scanning
The scanning can be resumed by calling resumeScanning() method.
barcodeReader.resumeScanning();
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