Firebase ML套件提供FirebaseMLException:等待文本识别模型下载.请稍等 [英] Firebase ML kit give FirebaseMLException: Waiting for the text recognition model to be downloaded. Please wait

问题描述

我正在使用firebase ml套件进行文本识别，但在模拟器和真实设备上会出现此异常.

I'm use firebase ml kit for text recognition but give this exception on emulator and real device.

W/System.err: com.google.firebase.ml.common.FirebaseMLException: Waiting for the text recognition model to be downloaded. Please wait.
    at com.google.android.gms.internal.firebase_ml.zzjz.zzc(Unknown Source)
    at com.google.android.gms.internal.firebase_ml.zzjz.zza(Unknown Source)
    at com.google.android.gms.internal.firebase_ml.zzic.call(Unknown Source)
    at com.google.android.gms.internal.firebase_ml.zzhx.zza(Unknown Source)
    at com.google.android.gms.internal.firebase_ml.zzhy.run(Unknown Source)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at com.google.android.gms.internal.firebase_ml.zze.dispatchMessage(Unknown Source)
    at android.os.Looper.loop(Looper.java:136)
    at android.os.HandlerThread.run(HandlerThread.java:61)

这是我的代码

private fun MlProcessText(imageUri:Uri) {
    val bitmap = MediaStore.Images.Media.getBitmap(contentResolver, imageUri)
    val textVision = FirebaseVisionImage.fromBitmap(bitmap)
    val detector = FirebaseVision.getInstance().onDeviceTextRecognizer

    detector.processImage(textVision).addOnSuccessListener { it ->
        val blocks = it.textBlocks
        if (blocks.size == 0 ){

            tvVision.text = "NO TEXT"
        }else{
            blocks.forEach {
                tvVision.append(" ${it.text}")
            }
        }

    }.addOnFailureListener {
        it.printStackTrace() // this is the exception log
        tvVision.text = it.message
    }
}

我也尝试过:

1- 设置->应用程序-> Google Play服务->存储->管理空间->清除所有数据

2-低存储空间检查(至少1Gig免费)

2- Low storage check (At least 1Gig free)

并添加元数据

 <meta-data
        android:name="com.google.firebase.ml.vision.DEPENDENCIES"
        android:value="ocr,text" />

但是仍然是同样的错误！

But still the same error!

更新

卡住几天后，我尝试使用 Google Mobile Vision

After getting stuck for several days i try to use Google Mobile Vision

所以我将其添加到我的依赖项中

So i add this to my dependencies

implementation 'com.google.android.gms:play-services-vision:17.0.2'

并使用本文 OCR 并在此代码中

    //Create the TextRecognizer
    final TextRecognizer textRecognizer = new TextRecognizer.Builder(getApplicationContext()).build();

    if (!textRecognizer.isOperational()) {
        Log.w(TAG, "Detector dependencies not loaded yet");
    } else {

        //Initialize camerasource to use high resolution and set Autofocus on.
        mCameraSource = new CameraSource.Builder(getApplicationContext(), textRecognizer)
                .setFacing(CameraSource.CAMERA_FACING_BACK)
                .setRequestedPreviewSize(1280, 1024)
                .setAutoFocusEnabled(true)
                .setRequestedFps(2.0f)
                .build();
     }

textRecognizer.isOperational()总是返回false.这意味着它也不起作用.我认为这两个问题有些共同点.

textRecognizer.isOperational() return always false. that mean it does not work too . I think there is something common with this two problem.

因此，我坚决坚持使用适用于android的文本识别器！

So i am steel stuck on text recognizer for android !

在以下设备上测试:Nox模拟器，google Nexus 5X API 26模拟器以及华为p10和三星Galaxy S7真实设备.

Test on : Nox emulator , google Nexus 5X API 26 emulator and on Huawei p10 and Samsung Galaxy S7 real device.

有解决这个问题的主意吗?

is there any idea to solve this problem?

推荐答案

TextRecognizer textRecognizer = new TextRecognizer.Builder(this).build();

    if(!textRecognizer.isOperational()) {
        // Note: The first time that an app using a Vision API is installed on a
        // device, GMS will download a native libraries to the device in order to do detection.
        // Usually this completes before the app is run for the first time.  But if that
        // download has not yet completed, then the above call will not detect any text,
        // barcodes, or faces.
        // isOperational() can be used to check if the required native libraries are currently
        // available.  The detectors will automatically become operational once the library
        // downloads complete on device.
        Log.w(LOG_TAG, "Detector dependencies are not yet available.");

        // Check for low storage.  If there is low storage, the native library will not be
        // downloaded, so detection will not become operational.
        IntentFilter lowstorageFilter = new IntentFilter(Intent.ACTION_DEVICE_STORAGE_LOW);
        boolean hasLowStorage = registerReceiver(null, lowstorageFilter) != null;

        if (hasLowStorage) {
            Toast.makeText(this,"Low Storage", Toast.LENGTH_LONG).show();
            Log.w(LOG_TAG, "Low Storage");
        }

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