android - tess-two 不会初始化，即使有正确的权限

Question

这是我目前正在做的事情：

• tess-two 在我的 Android 项目中设置

• 我在我的主应用程序的 AndroidManifest.xml 中指定了权限（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;
          }
      }
  }
  

当我运行该应用程序时，我的日志中出现以下错误：

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

我不知道从这里去哪里，所以任何帮助或建议将不胜感激，谢谢:)

Answer 1

确保您使用的是正确版本的训练数据文件。