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* Very rough Barcode Scanning * Polished the barcode scanner giving users more options
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133 changes: 133 additions & 0 deletions
133
app/src/main/java/com/example/househomey/scanner/BarcodeImageScanner.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| package com.example.househomey.scanner; | ||
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| import android.app.AlertDialog; | ||
| import android.content.Context; | ||
| import android.net.Uri; | ||
| import android.util.Log; | ||
| import android.widget.Toast; | ||
|
|
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| import androidx.annotation.NonNull; | ||
|
|
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| import com.google.android.gms.tasks.OnFailureListener; | ||
| import com.google.android.gms.tasks.OnSuccessListener; | ||
| import com.google.android.gms.tasks.Task; | ||
| import com.google.mlkit.vision.barcode.BarcodeScanner; | ||
| import com.google.mlkit.vision.barcode.BarcodeScannerOptions; | ||
| import com.google.mlkit.vision.barcode.BarcodeScanning; | ||
| import com.google.mlkit.vision.barcode.common.Barcode; | ||
| import com.google.mlkit.vision.common.InputImage; | ||
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|
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| import java.io.IOException; | ||
| import java.util.List; | ||
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| /** | ||
| * A class for handling the scanning and decoding of barcodes | ||
| * and updating item information accordingly | ||
| * @author Sami | ||
| */ | ||
| public class BarcodeImageScanner extends ImageScanner{ | ||
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| private InputImage image; | ||
| private BarcodeScanner scanner; | ||
| private Context context; | ||
| private final OnBarcodeScannedListener listener; | ||
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|
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| /** | ||
| * Constructs a new BarcodeImageScanner | ||
| * @param context context of this scanner | ||
| * @param listener listener that handles the action when barcode is scanned | ||
| */ | ||
| public BarcodeImageScanner(Context context, OnBarcodeScannedListener listener) { | ||
| this.context = context; | ||
| this.listener = listener; | ||
|
|
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| } | ||
|
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| /** | ||
| * Scans image for barcodes using Google's MLKit API and handles information extraction | ||
| * @param imageUri Image to scan | ||
| */ | ||
| @Override | ||
| public void scanImage(String imageUri) { | ||
| try { | ||
| image = InputImage.fromFilePath(context, Uri.parse(imageUri)); | ||
| } catch (IOException e) { | ||
| e.printStackTrace(); | ||
| } | ||
| scanner = BarcodeScanning.getClient(); | ||
| Task<List<Barcode>> result = scanner.process(image) | ||
| .addOnSuccessListener(new OnSuccessListener<List<Barcode>>() { | ||
| @Override | ||
| public void onSuccess(List<Barcode> barcodes) { | ||
| selectProductInfoFromBarcode(barcodes,context); | ||
| } | ||
| }) | ||
| .addOnFailureListener(new OnFailureListener() { | ||
| @Override | ||
| public void onFailure(@NonNull Exception e) { | ||
| Toast.makeText(context.getApplicationContext(), | ||
| ("Failure in scanning barcode!"), | ||
| Toast.LENGTH_SHORT).show(); | ||
| Log.e("Scanner","faied to scan"); | ||
| } | ||
| }); | ||
|
|
||
| } | ||
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| /** | ||
| * Ensures that only 1 barcode was scanned and extracts the value encoded into the barcode | ||
| * Depending on the value type, lets user set it as either item description or Serial Number | ||
| * @param barcodes List of barcodes detected and scanned by the scanner | ||
| * @param context context in which the scanner is being used in the app | ||
| */ | ||
| private void selectProductInfoFromBarcode(List<Barcode> barcodes, Context context) { | ||
| if (barcodes.size() == 0) { | ||
| Toast.makeText(context.getApplicationContext(), | ||
| ("No barcodes were detected. Please use a different image."), | ||
| Toast.LENGTH_LONG).show(); | ||
| } | ||
| else if (barcodes.size()==1){ | ||
| String productInfo = barcodes.get(0).getDisplayValue(); | ||
|
|
||
| if (barcodes.get(0).getValueType() == 7 || barcodes.get(0).getValueType() == 5) { | ||
| new AlertDialog.Builder(context) | ||
| .setTitle("Item info from decoded barcode: ") | ||
| .setMessage(productInfo + | ||
| "\n \nDecoded value may be a serial number. Set as:") | ||
| .setPositiveButton("Description",(dialog,which)->{ | ||
| listener.onBarcodeOKPressed(productInfo); | ||
| }) | ||
| .setNegativeButton("Serial Number",(dialog,which)->{ | ||
| listener.onSerialNumberOKPressed(productInfo); | ||
| }) | ||
| .setNeutralButton("Cancel", null) | ||
| .show(); | ||
| } | ||
| else { | ||
| new AlertDialog.Builder(context) | ||
| .setTitle("Item info from decoded barcode: ") | ||
| .setMessage(productInfo + | ||
| "\n \nSet info as item description?") | ||
| .setPositiveButton("YES",(dialog,which)->{ | ||
| listener.onBarcodeOKPressed(productInfo); | ||
| }) | ||
| .setNegativeButton("NO", null) | ||
| .show(); | ||
| } | ||
|
|
||
| } | ||
| else { | ||
| Toast.makeText(context.getApplicationContext(), | ||
| ("Multiple barcodes detected. Please choose an image with one barcode."), | ||
| Toast.LENGTH_LONG).show(); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Interface to handle how the decoded value of the barcode is used after scanning | ||
| */ | ||
| public interface OnBarcodeScannedListener { | ||
| void onBarcodeOKPressed(String description); | ||
| void onSerialNumberOKPressed(String serialNumber); | ||
| } | ||
| } |
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