twinscodeinc/code-scanner

Code scanner library for Android, based on ZXing

Code scanner library for Android, based on ZXing

The library will migrate to Camera2 API soon, minimum SDK version will be raised to 21

Features

• Auto focus and flash light control
• Portrait and landscape screen orientations
• Back and front facing cameras
• Customizable viewfinder
• Kotlin friendly
• Touch focus

Supported formats

1D product	1D industrial	2D
UPC-A	Code 39	QR Code
UPC-E	Code 93	Data Matrix
EAN-8	Code 128	Aztec
EAN-13	Codabar	PDF 417
	ITF	MaxiCode
	RSS-14
	RSS-Expanded

Usage (sample)

Step 1. Add it in your root build.gradle at the end of repositories:

allprojects {

    repositories {

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

or in settings.gradle file:

dependencyResolutionManagement {

    repositories {

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

Step 2. Add dependency:

dependencies {
    implementation 'com.github.yuriy-budiyev:code-scanner:2.3.2'
}

Add camera permission and hardware feature to AndroidManifest.xml (Don't forget about dynamic permissions on API >= 23):

<uses-permission android:name="android.permission.CAMERA"/>

<uses-feature
    android:name="android.hardware.camera"
    android:required="false"/>

Define a view in your layout file:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.budiyev.android.codescanner.CodeScannerView
        android:id="@+id/scanner_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</FrameLayout>

You can use XML attributes to set CodeScannerView parameters:

maskColor
maskVisible
frameColor
frameVisible
frameThickness
frameCornersSize
frameCornersRadius
frameCornersCapRounded
frameAspectRatioWidth
frameAspectRatioHeight
frameSize
frameVerticalBias
autoFocusButtonColor
autoFocusButtonVisible
autoFocusButtonPaddingHorizontal
autoFocusButtonPaddingVertical
autoFocusButtonOnIcon
autoFocusButtonOffIcon
autoFocusButtonPosition
flashButtonColor
flashButtonVisible
flashButtonPaddingHorizontal
flashButtonPaddingVertical
flashButtonOnIcon
flashButtonOffIcon
flashButtonPosition

And add following code to your activity:

Kotlin

class MainActivity : AppCompatActivity() {
    private lateinit var codeScanner: CodeScanner

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val scannerView = findViewById<CodeScannerView>(R.id.scanner_view)
        
        codeScanner = CodeScanner(this, scannerView)
        
        // Parameters (default values)
        codeScanner.camera = CodeScanner.CAMERA_BACK // or CAMERA_FRONT or specific camera id
        codeScanner.formats = CodeScanner.ALL_FORMATS // list of type BarcodeFormat,
                                                      // ex. listOf(BarcodeFormat.QR_CODE)
        codeScanner.autoFocusMode = AutoFocusMode.SAFE // or CONTINUOUS
        codeScanner.scanMode = ScanMode.SINGLE // or CONTINUOUS or PREVIEW
        codeScanner.isAutoFocusEnabled = true // Whether to enable auto focus or not
        codeScanner.isFlashEnabled = false // Whether to enable flash or not
        
        // Callbacks
        codeScanner.decodeCallback = DecodeCallback {
            runOnUiThread {
                Toast.makeText(this, "Scan result: ${it.text}", Toast.LENGTH_LONG).show()
            }
        }
        codeScanner.errorCallback = ErrorCallback { // or ErrorCallback.SUPPRESS
            runOnUiThread {
                Toast.makeText(this, "Camera initialization error: ${it.message}",
                        Toast.LENGTH_LONG).show()
            }
        }
        
        scannerView.setOnClickListener {
            codeScanner.startPreview()
        }
    }

    override fun onResume() {
        super.onResume()
        codeScanner.startPreview()
    }

    override fun onPause() {
        codeScanner.releaseResources()
        super.onPause()
    }
}

Java

public class MainActivity extends AppCompatActivity {
    private CodeScanner mCodeScanner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        CodeScannerView scannerView = findViewById(R.id.scanner_view);
        mCodeScanner = new CodeScanner(this, scannerView);
        mCodeScanner.setDecodeCallback(new DecodeCallback() {
            @Override
            public void onDecoded(@NonNull final Result result) {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(MainActivity.this, result.getText(), Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
        scannerView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mCodeScanner.startPreview();
            }
        });       
    }

    @Override
    protected void onResume() {
        super.onResume();
        mCodeScanner.startPreview();
    }

    @Override
    protected void onPause() {
        mCodeScanner.releaseResources();
        super.onPause();
    }
}

or fragment:

Kotlin

class MainFragment : Fragment() {
    private lateinit var codeScanner: CodeScanner

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, 
            savedInstanceState: Bundle?): View {
        return inflater.inflate(R.layout.fragment_main, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        val scannerView = view.findViewById<CodeScannerView>(R.id.scanner_view)
        val activity = requireActivity()
        codeScanner = CodeScanner(activity, scannerView)
        codeScanner.decodeCallback = DecodeCallback {
            activity.runOnUiThread {
                Toast.makeText(activity, it.text, Toast.LENGTH_LONG).show()
            }
        }
        scannerView.setOnClickListener {
            codeScanner.startPreview()
        }
    }

    override fun onResume() {
        super.onResume()
        codeScanner.startPreview()
    }

    override fun onPause() {
        codeScanner.releaseResources()
        super.onPause()
    }
}

Java

public class MainFragment extends Fragment {
    private CodeScanner mCodeScanner;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
            @Nullable Bundle savedInstanceState) {
        final Activity activity = getActivity();
        View root = inflater.inflate(R.layout.fragment_main, container, false);
        CodeScannerView scannerView = root.findViewById(R.id.scanner_view);
        mCodeScanner = new CodeScanner(activity, scannerView);
        mCodeScanner.setDecodeCallback(new DecodeCallback() {
            @Override
            public void onDecoded(@NonNull final Result result) {
                activity.runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(activity, result.getText(), Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
        scannerView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mCodeScanner.startPreview();
            }
        });        
        return root;
    }

    @Override
    public void onResume() {
        super.onResume();
        mCodeScanner.startPreview();
    }

    @Override
    public void onPause() {
        mCodeScanner.releaseResources();
        super.onPause();
    }
}

Preview