来自 googles mlkit 的条码扫描仪无法识别任何条码

如何解决来自 googles mlkit 的条码扫描仪无法识别任何条码

所以我按照谷歌的条码扫描器教程 (this one) 进行了 qr 扫描，就像一个魅力。唯一的问题是我不需要二维码，而是条形码。但它们不起作用。它没有检测到任何东西。我尝试了多个在线条形码和来自房子周围的条形码，但没有一个被识别为条形码。

这是我的活动中处理图像和扫描仪的代码：

public void btnClick(View v) {

    Intent imageTakeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    if(imageTakeIntent.resolveActivity(getPackageManager())!=null){
        startActivityForResult(imageTakeIntent,101);
    }
}

@Override
protected void onActivityResult(int requestCode,int resultCode,Intent data) {
    super.onActivityResult(requestCode,resultCode,data);
    if(requestCode==101 && resultCode==RESULT_OK) {
        Bundle extras = data.getExtras();
        Bitmap imageBitmap = (Bitmap) extras.get("data");
        imageView.setImageBitmap(imageBitmap);
        image = InputImage.fromBitmap(imageBitmap,0);
        barCodeScanning();
    }
}

public void barCodeScanning(){
    BarcodeScannerOptions options =
            new BarcodeScannerOptions.Builder()
                    .setBarcodeFormats(
                            Barcode.FORMAT_CODE_128,Barcode.FORMAT_CODE_93,Barcode.FORMAT_CODABAR,Barcode.FORMAT_EAN_13,Barcode.FORMAT_EAN_8,Barcode.FORMAT_ITF,Barcode.FORMAT_UPC_A,Barcode.FORMAT_UPC_E,Barcode.FORMAT_PDF417,Barcode.FORMAT_DATA_MATRIX,Barcode.FORMAT_QR_CODE,Barcode.FORMAT_AZTEC)
                    .build();
    BarcodeScanner scanner = BarcodeScanning.getClient();
    Task<List<Barcode>> result = scanner.process(image)
            .addOnSuccessListener(new OnSuccessListener<List<Barcode>>() {
                @Override
                public void onSuccess(List<Barcode> barcodes) {
                    System.out.println(barcodes.size());
                    for (Barcode barcode: barcodes) {
                        Rect bounds = barcode.getBoundingBox();
                        Point[] corners = barcode.getCornerPoints();

                        String rawValue = barcode.getRawValue();
                        System.out.println(rawValue);

                        int valueType = barcode.getValueType();
                        System.out.println(valueType);
                    }
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    e.printStackTrace();
                }
            });
}

控制台对我来说看起来很好，除了标为红色但在谷歌上没有出现任何有用结果的 E/libc: Access denied finding property "ro.hardware.chipname" 行。这是完整的控制台输出：

02/26 18:29:10: Launching 'app' on HMD Global Nokia 5.3.
Install successfully finished in 2 s 230 ms.
$ adb shell am start -n "com.project.kuecheninventar/com.project.kuecheninventar.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Connected to process 28314 on device 'hmd_global-nokia_5_3-N0AA003687KA2700363'.
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
I/Perf: Connecting to perf service.
W/kuecheninventa: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist,reflection,allowed)
Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (greylist,allowed)
I/AdrenoGLES: QUALCOMM build                   : cfd6c90,Id60e6598a1
Build Date                       : 01/27/20
OpenGL ES Shader Compiler Version: EV031.27.05.03
Local Branch                     : mybranchea40f85b-21cb-f1fb-b0c0-5cb90179c3e0
Remote Branch                    : quic/gfx-adreno.lnx.1.0.r91-rel
Remote Branch                    : NONE
Reconstruct Branch               : NOTHING
Build Config                     : S P 8.0.12 AArch64
I/AdrenoGLES: PFP: 0x016ee187,ME: 0x00000000
W/Gralloc3: mapper 3.x is not supported
D/TransportRuntime.JobInfoScheduler: Scheduling upload for context TransportContext(cct,VERY_LOW,MSRodHRwczovL2ZpcmViYXNlbG9nZ2luZy5nb29nbGVhcGlzLmNvbS92MGNjL2xvZy9iYXRjaD9mb3JtYXQ9anNvbl9wcm90bzNc) with jobId=-1883559869 in 86400000ms(Backend next call timestamp 0). Attempt 1
I/DynamiteModule: Considering local module com.google.mlkit.dynamite.barcode:10000 and remote module com.google.mlkit.dynamite.barcode:0
Selected local version of com.google.mlkit.dynamite.barcode
I/tflite: Initialized TensorFlow Lite runtime.
I/native: barcode_detector_client.cc:239 Not using NNAPI
E/libc: Access denied finding property "ro.hardware.chipname"
D/TransportRuntime.SQLiteEventStore: Storing event with priority=VERY_LOW,name=FIREBASE_ML_SDK for destination cct
D/TransportRuntime.JobInfoScheduler: Upload for context TransportContext(cct,MSRodHRwczovL2ZpcmViYXNlbG9nZ2luZy5nb29nbGVhcGlzLmNvbS92MGNjL2xvZy9iYXRjaD9mb3JtYXQ9anNvbl9wcm90bzNc) is already scheduled. Returning...
I/System.out: 0
D/TransportRuntime.SQLiteEventStore: Storing event with priority=VERY_LOW,MSRodHRwczovL2ZpcmViYXNlbG9nZ2luZy5nb29nbGVhcGlzLmNvbS92MGNjL2xvZy9iYXRjaD9mb3JtYXQ9anNvbl9wcm90bzNc) is already scheduled. Returning...
D/TransportRuntime.SQLiteEventStore: Storing event with priority=VERY_LOW,MSRodHRwczovL2ZpcmViYXNlbG9nZ2luZy5nb29nbGVhcGlzLmNvbS92MGNjL2xvZy9iYXRjaD9mb3JtYXQ9anNvbl9wcm90bzNc) is already scheduled. Returning...

行 System.out.println(barcodes.size()); 只打印 0，这意味着条码列表为空。是我做错了什么还是为什么二维码可以识别但没有条形码？

解决方法

我忘记了这个问题，因为我是通过另一种方式解决的。所以这是我的 zxing 解决方案：在应用built.gradle 中使用implementation 'com.journeyapps:zxing-android-embedded:4.1.0'

public class BarCodeScanner extends AppCompatActivity {

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        scan();
    }

    private void scan() {
        IntentIntegrator i = new IntentIntegrator(this);

        i.setDesiredBarcodeFormats(IntentIntegrator.PRODUCT_CODE_TYPES);

        i.setCaptureActivity(CaptureActivitaet.class);
        i.setOrientationLocked(false);
        i.setBeepEnabled(false);
        i.setPrompt("Scanning");
        i.initiateScan();
    }

    @Override
    protected void onActivityResult(int requestCode,int resultCode,@Nullable Intent data) {
        IntentResult res = IntentIntegrator.parseActivityResult(requestCode,resultCode,data);
        if (res != null) {
            if (res.getContents() != null) {
                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setMessage(res.getContents());
                builder.setTitle(getString(R.string.scanComplete));
                builder.setPositiveButton(R.string.ok,(dialogInterface,i) -> {
                    setResult(RESULT_OK,new Intent().putExtra("code",res.getContents()));
                    finish();
                }).setNegativeButton(R.string.scanAgain,i) -> scan());
                AlertDialog dialog = builder.create();
                dialog.show();
            } else {
                Toast.makeText(this,"No Results",Toast.LENGTH_LONG).show();
            }
        } else {
            super.onActivityResult(requestCode,data);
        }
    }
}

捕获 Activity 只是一个空的 Activity public class CaptureActivitaet extends CaptureActivity {}，尽管它必须在 Manifest 文件中像这样配置：

    <activity
        android:name="com.project.Grocerly.UI.CaptureActivitaet"
        android:screenOrientation="fullSensor"
        android:stateNotNeeded="true"
        android:windowSoftInputMode="stateAlwaysHidden" />

这会打开一个全屏相机 Activity，它会根据 i.setDesiredBarcodeFormats(IntentIntegrator.PRODUCT_CODE_TYPES); 方法中通过 scan() 设置的类型相应地扫描代码。如果您使用 setCaptureActivity(this.class) 并在清单文件中正确配置它，则可能会跳过额外的捕获活动，但我不确定这一点。

因为这是一个大学项目，这个代码不是很漂亮，但它有效，这是我当时主要关心的问题。

来自 googles mlkit 的条码扫描仪无法识别任何条码

如何解决来自 googles mlkit 的条码扫描仪无法识别任何条码

解决方法

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