Question

这是我目前正在做的事情：

tess-two在我的Android项目中设置

我有主应用程序的AndroidManifest.xml中指定的权限（不是tess-two AndroidManifest.xml）：

我还在我的代码中明确检查权限：

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();
}

尝试初始化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;
        }
    }
}

当我运行应用程序时，我的日志中出现以下错误：

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

我不知道从哪里开始，所以任何帮助或建议都会非常感激，谢谢：）

Answer 1

确保您使用的是training data files的正确版本。

即使拥有正确的权限，tess-two也不会初始化

1 个答案: