kroegerama / Barcode Kaiteki

Barcode-Kaiteki

An easy to use library for barcode detection. Based on the new AndroidX Camera2 api. Uses the zxing barcode detection library.

Comes with a BarcodeView, which combines a camera preview and an automatic overlay for detected barcodes.

Also contains three differend ready to use dialogs:

• BarcodeDialog (DialogFragment)
• BarcodeBottomSheet (BottomSheetDialogFragment)
• BarcodeAlertDialog (AlertDialog)
• BarcodeFragment (Fragment)

Features

• camera permission handling
• customize the displayed result points
• customize the barcode type (can be a list)
• allows scanning of inverted barcodes (white barcode on black background)

Add library dependency

Add jitpack to your toplevel gradle file (if not already present):

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

Add barcode-kaiteki as dependency:

dependencies {
    implementation 'com.kroegerama:barcode-kaiteki:<version>'
}

Usage

BarcodeDialog

Just let your Activity/Fragment implement BarcodeResultListener.

class MainActivity : AppCompatActivity(), BarcodeResultListener {

    //...

    override fun onBarcodeResult(result: Result): Boolean {
        Log.d(TAG, "Result: $result")

        //return false to not automatically close the dialog
        return false
    }
}

Then it is as easy as showing one of the provided dialogs.

//show a Barcode FragmentDialog (with swipe to dismiss)
BarcodeDialog.show(
    childFragmentManager,
    formats = listOf(BarcodeFormat.QR_CODE),
    barcodeInverted = false
)

//show a Barcode BottomSheet
BarcodeBottomSheet.show(
    childFragmentManager,
    formats = listOf(BarcodeFormat.QR_CODE),
    barcodeInverted = false
)

//show an AlertDialog from activity
showBarcodeAlertDialog(
    owner = this,
    listener = this,
    formats = listOf(BarcodeFormat.QR_CODE),
    barcodeInverted = false
)
//or from a Fragment
requireContext().showBarcodeAlertDialog(
    owner = this,
    listener = this,
    formats = listOf(BarcodeFormat.QR_CODE),
    barcodeInverted = false
)

//show a Barcode Fragment
val barcodeFragment = BarcodeFragment.makeInstance(
    formats = listOf(BarcodeFormat.QR_CODE),
    barcodeInverted = false
)
supportFragmentManager.beginTransaction()
    .replace(R.id.container, barcodeFragment)
    .commit()

BarcodeView

You can also use the BarcodeView directly in your Layout.

<com.kroegerama.kaiteki.bcode.views.BarcodeView
    android:id="@+id/bcode"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:resultPointColor="#09E85E"
    app:resultPointSize="8dp"
    app:showResultPoints="true" />

Then add in your onCreate/onViewCreated: bcode.bindToLifecycle(this) and in your onStop: bcode.unbind().

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    bcode.setFormats(listOf(BarcodeFormat.QR_CODE,  BarcodeFormat.AZTEC))
    bcode.setBarcodeResultListener(this)
    bcode.bindToLifecycle(this)
}

override fun onStop() {
    super.onStop()
    bcode.unbind()
}