
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);
}
}