Google Mobile Vision Text-API-Beispiel

Den Google-Play-Dienste der Mobile Vision-API-Dokumentation beschreibt, wie Sie dies tun, können Sie die TextRecognizer Klasse zum erkennen von text in Frames. Sobald Sie das Bitmap-Bild können Sie dann wandeln es in einen Rahmen, und tun Verarbeitung auf. Siehe unten für ein Beispiel.

//imageBitmap is the Bitmap image you're trying to process for text
if(imageBitmap != null) {

    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");
        }
    }


    Frame imageFrame = new Frame.Builder()
            .setBitmap(imageBitmap)
            .build();

    SparseArray<TextBlock> textBlocks = textRecognizer.detect(imageFrame);

    for (int i = 0; i < textBlocks.size(); i++) {
        TextBlock textBlock = textBlocks.get(textBlocks.keyAt(i));

        Log.i(LOG_TAG, textBlock.getValue()); 
        //Do something with value
    }
}

Müssen Sie auch, um sicherzustellen, Sie gehören der mobile vision Abhängigkeit in das Modul zu bauen.gradle

dependencies {
    compile 'com.google.android.gms:play-services-vision:9.4.0'
} 

Und auch die folgenden in der app die Android-Manifest -

<meta-data
    android:name="com.google.android.gms.vision.DEPENDENCIES"
    android:value="ocr" />