Android Tutorial

Android Create a Bar Code Scanner ( ZxingScannerView )

Android Create a Bar Code Scanner ( ZxingScannerView )

Hey in these tutorial i am create a easy way to  android bar code scanner . today bar is used every product to used digital market show a detail. you can scan bar code and get detail of product .

Step 1 :  To  Start Android Studio.

Step 2 :   Create a New Project Project Click On  ==>  File  ==>  NEW  ==>  New Project. 

Enter App Name and Click On next

Select App Developer for Phone and Tablet

Select a Empty Activity and click on next

Create a Activity in your Project Home name

In your home activity add a button scan

Step 3:-  Add Dependencies in your build.gradle.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:28.+'
    compile 'com.android.support:design:28.+'
    compile 'com.android.support:support-v4:28.+'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.journeyapps:zxing-android-embedded:3.4.0'
    compile 'me.dm7.barcodescanner:core:1.9'
    compile 'com.android.support:multidex:1.0.0'
    testCompile 'junit:junit:4.12'
}

Step 4 :- Add user permission in mainfests file.

<uses-permission android:name="android.permission.CAMERA" /> 
<uses-feature android:name="android.hardware.camera" /> 
<uses-feature android:name="android.hardware.camera.autofocus" />

Create a main activity in your project  and open your main activity java and xml file.

Step 5:- Main Activity Xml  Complete code ( activity_main.xml ).

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:gravity="center"
    android:layout_height="match_parent"
    tools:context="com.codepalyon.barcodescanner.Main">

    <Button
        android:id="@+id/ScannerBtn"
        android:layout_width="150dp"
        android:layout_gravity="center"
        android:layout_height="50dp"
        android:text="Scan"/>

</LinearLayout>

Step 6:-  Main.java   file Complete code.

public class Main extends AppCompatActivity {
Button ScanerBtn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ScanerBtn=(Button)findViewById(R.id.ScannerBtn);
        ScanerBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(Main.this,Home.class);
                startActivity(intent);
            }
        });
    }
}

Step 7:- to create any other activity Home_Scanner.java

public  class Home extends AppCompatActivity  implements ZXingScannerView.ResultHandler{
private ZXingScannerView mScannerView;
private static final int WRITE_EXST = 1;
private static final int REQUEST_PERMISSION = 123;
        int CAMERA;
        String position,formt;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
//        Thread.setDefaultUncaughtExceptionHandler(new UnCaughtException(this));

        if( ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        requestPermissions(new String[]{Manifest.permission.CAMERA},5);
        }
        }

        ViewGroup contentFrame = (ViewGroup) findViewById(R.id.content_frame);
        mScannerView = new ZXingScannerView(this);
        contentFrame.addView(mScannerView);
        }
@Override
public void onResume() {
        super.onResume();
        mScannerView.setResultHandler(this);
        mScannerView.startCamera();
        }

@Override
public void onPause() {
        super.onPause();
        mScannerView.stopCamera();
        }

@Override
public void handleResult(Result rawResult) {
        Toast.makeText(this, "Contents = " + rawResult.getText() +", Format = " + rawResult.getBarcodeFormat().toString(), Toast.LENGTH_LONG).show();
        position=rawResult.getText();
        formt=rawResult.getBarcodeFormat().toString();
        Intent intent=new Intent();
        intent.putExtra("Contents",position);
        intent.putExtra("Format",formt);
        setResult(RESULT_OK,intent);
        finish();

        }

        @Override
        public void handleResult(MediaBrowserServiceCompat.Result rawResult) {

        }
}

Step 8:-  activity_home_scanner.xml   Complete code.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.codepalyon.barcodescanner.Home">


    <TextView
        android:padding="5dp"
        android:textColor="@android:color/white"
        android:background="@android:color/black"
        android:text="Place your camera above the bar code on coupon to scan !"
        android:id="@+id/tv_scan"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"/>

    <FrameLayout
        android:layout_below="@+id/tv_scan"
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </FrameLayout>
</RelativeLayout>

Step 9:-  Create a java Class   ZxingScannerView.java Complete code .

public class ZXingScannerView extends BarcodeScannerView {
    private static final String TAG = "ZXingScannerView";

    public interface ResultHandler {
        public void handleResult(Result rawResult);

        void handleResult(MediaBrowserServiceCompat.Result rawResult);
    }

    private MultiFormatReader mMultiFormatReader;
    public static final List<BarcodeFormat> ALL_FORMATS = new ArrayList<BarcodeFormat>();
    private List<BarcodeFormat> mFormats;
    private ResultHandler mResultHandler;

    static {
        ALL_FORMATS.add(BarcodeFormat.UPC_A);
        ALL_FORMATS.add(BarcodeFormat.UPC_E);
        ALL_FORMATS.add(BarcodeFormat.EAN_13);
        ALL_FORMATS.add(BarcodeFormat.EAN_8);
        ALL_FORMATS.add(BarcodeFormat.RSS_14);
        ALL_FORMATS.add(BarcodeFormat.CODE_39);
        ALL_FORMATS.add(BarcodeFormat.CODE_93);
        ALL_FORMATS.add(BarcodeFormat.CODE_128);
        ALL_FORMATS.add(BarcodeFormat.ITF);
        ALL_FORMATS.add(BarcodeFormat.CODABAR);
        ALL_FORMATS.add(BarcodeFormat.QR_CODE);
        ALL_FORMATS.add(BarcodeFormat.DATA_MATRIX);
        ALL_FORMATS.add(BarcodeFormat.PDF_417);
    }

    public ZXingScannerView(Context context) {
        super(context);
        initMultiFormatReader();
    }

    public ZXingScannerView(Context context, AttributeSet attributeSet) {
        super(context, attributeSet);
        initMultiFormatReader();
    }

    public void setFormats(List<BarcodeFormat> formats) {
        mFormats = formats;
        initMultiFormatReader();
    }

    public void setResultHandler(ResultHandler resultHandler) {
        mResultHandler = resultHandler;
    }

    public Collection<BarcodeFormat> getFormats() {
        if(mFormats == null) {
            return ALL_FORMATS;
        }
        return mFormats;
    }

    private void initMultiFormatReader() {
        Map<DecodeHintType,Object> hints = new EnumMap<DecodeHintType,Object>(DecodeHintType.class);
        hints.put(DecodeHintType.POSSIBLE_FORMATS, getFormats());
        mMultiFormatReader = new MultiFormatReader();
        mMultiFormatReader.setHints(hints);
    }

    @Override
    public void onPreviewFrame(byte[] data, Camera camera) {
        if(mResultHandler == null) {
            return;
        }

        try {
            Camera.Parameters parameters = camera.getParameters();
            Camera.Size size = parameters.getPreviewSize();
            int width = size.width;
            int height = size.height;

            if (DisplayUtils.getScreenOrientation(getContext()) == Configuration.ORIENTATION_PORTRAIT) {
                byte[] rotatedData = new byte[data.length];
                for (int y = 0; y < height; y++) {
                    for (int x = 0; x < width; x++)
                        rotatedData[x * height + height - y - 1] = data[x + y * width];
                }
                int tmp = width;
                width = height;
                height = tmp;
                data = rotatedData;
            }

            Result rawResult = null;
            PlanarYUVLuminanceSource source = buildLuminanceSource(data, width, height);

            if (source != null) {
                BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
                try {
                    rawResult = mMultiFormatReader.decodeWithState(bitmap);
                } catch (ReaderException re) {
                    // continue
                } catch (NullPointerException npe) {
                    // This is terrible
                } catch (ArrayIndexOutOfBoundsException aoe) {
                } finally {
                    mMultiFormatReader.reset();
                }
            }

            final Result finalRawResult = rawResult;
            if (finalRawResult != null) {
                Handler handler = new Handler(Looper.getMainLooper());
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        // Stopping the preview can take a little long.
                        // So we want to set result handler to null to discard subsequent calls to
                        // onPreviewFrame.
                        ResultHandler tmpResultHandler = mResultHandler;
                        mResultHandler = null;
                        stopCameraPreview();
                        if (tmpResultHandler != null) {
                            tmpResultHandler.handleResult(finalRawResult);
                        }
                    }
                });
            } else {
                camera.setOneShotPreviewCallback(this);
            }
        } catch(RuntimeException e) {
            // TODO: Terrible hack. It is possible that this method is invoked after camera is released.
            Log.e(TAG, e.toString(), e);
        }
    }

    public void resumeCameraPreview(ResultHandler resultHandler) {
        mResultHandler = resultHandler;
        super.resumeCameraPreview();
    }

    public PlanarYUVLuminanceSource buildLuminanceSource(byte[] data, int width, int height) {
        Rect rect = getFramingRectInPreview(width, height);
        if (rect == null) {
            return null;
        }
        // Go ahead and assume it's YUV rather than die.
        PlanarYUVLuminanceSource source = null;
        try {
            source = new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top, rect.width(), rect.height(), false);
        } catch(Exception e) {
        }
        return source;
    }
}

Step 10:-  Create a  java class  BaseScannerActivity.java 

public class BaseScannerActivity extends AppCompatActivity {

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            // Respond to the action bar's Up/Home button
            case android.R.id.home:
                finish();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

 
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