tess-two won't initialise, even with correct permissions

Question

Here's what I'm currently doing:

tess-two is set up in my Android project

I have permissions specified in the AndroidManifest.xml of my main app (not the tess-two AndroidManifest.xml):

I also check for permissions explicitly in my code:

int readPermission = ActivityCompat.checkSelfPermission(this, READ_EXTERNAL_STORAGE);
int writePermission = ActivityCompat.checkSelfPermission(this, WRITE_EXTERNAL_STORAGE);

// Check we have both read and write permissions
if (readPermission != PackageManager.PERMISSION_GRANTED
        || writePermission != PackageManager.PERMISSION_GRANTED)
{
    // We don't have permission so prompt the user
    ActivityCompat.requestPermissions(
            this,
            new String[] {READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE},
            REQUEST_EXTERNAL_STORAGE
    );
}
else
{
    Log.d(TAG, "Read and write external permissions granted");
    initTess();
}

Try to initialise the TessBaseAPI:

private void initTess()
{
    // Check we have the eng.traineddata file in the correct place
    mTessDataPath = getFilesDir() + "/tesseract/";
    checkTessFile(new File(mTessDataPath + "tessdata/"));

    // Initialise TessBaseAPI
    mTess = new TessBaseAPI();
    mTess.init(mTessDataPath, "eng");
}

private void checkTessFile(File dir)
{
    // Check if directory already exists
    if (dir.exists())
    {
        // Check if file already exists
        String dataFilePath = mTessDataPath + "tessdata/eng.traineddata";
        File datafile = new File(dataFilePath);

        if (!datafile.exists())
        {
            // If file doesn't exist, copy it over from assets folder
            copyTessFiles();
        }
    }
    else
    {
        if (dir.mkdirs())
        {
            // If directory doesn't exist, but we can create it, copy file from assets folder
            copyTessFiles();
        }
    }
}

private void copyTessFiles()
{
    try
    {
        // Location we want the file to be at
        String filepath = mTessDataPath + "tessdata/eng.traineddata";

        // Get access to AssetManager
        AssetManager assetManager = getAssets();

        // Open byte streams for reading/writing
        InputStream instream = assetManager.open("tessdata/eng.traineddata");
        OutputStream outstream = new FileOutputStream(filepath);

        // Copy the file to the location specified by filepath
        byte[] buffer = new byte[1024];
        int read;
        while ((read = instream.read(buffer)) != -1)
        {
            outstream.write(buffer, 0, read);
        }
        outstream.flush();
        outstream.close();
        instream.close();
    }
    catch (FileNotFoundException e)
    {
        e.printStackTrace();
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults)
{
    switch (requestCode)
    {
        case REQUEST_EXTERNAL_STORAGE:
        {
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED)
            {
                // Initialise Tesseract API
                initTess();
            }

            return;
        }
    }
}

When I run the app, I get the following error in my logs:

E/Tesseract(native): Could not initialize Tesseract API with language=eng!

I have no idea where to go from here, so any help or advise would be hugely appreciated, thank you :)

Where is your onRequestPermissionsResult method where you handle the permission? — anti_gone, Feb 22 '17 at 00:12
I've edited the question to show this, and added the call to the initTess() method if we already have both permissions (which I do). — LomaxOnTheRun, Feb 22 '17 at 01:16
Possible duplicate of [Could not initialize Tesseract API with language=eng](https://stackoverflow.com/questions/38291379/could-not-initialize-tesseract-api-with-language-eng) — rmtheis, May 24 '18 at 20:47

score 0 · Answer 1 · answered Apr 16 '17 at 14:02

0

Make sure you're using the right version of the training data files.

answered Apr 16 '17 at 14:02

rmtheis

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tess-two won't initialise, even with correct permissions

1 Answers1