如何使用谷歌云视觉在android studio中提取多种文本语言

Question

我正在尝试构建一个Android应用程序（在android studio平台中），它使用谷歌云视觉从图像中提取不同的文本语言，但我在启动时遇到问题。

我不知道如何使用谷歌云文件。我需要创建或下载哪些文件以及如何指导我的API提取多种语言？

我得到了API和这个源代码：

  

POST https://vision.googleapis.com/v1/images:annotate?key=YOUR_API_KEY

{
  "requests": [
    {
      "image": {
        "content": "/9j/7QBEUGhvdG9zaG9...base64-encoded-image-content...fXNWzvDEeYxxxzj/Coa6Bax//Z"
      },
      "features": [
        {
          "type": "TEXT_DETECTION"
        }
      ]
    }
  ]
}



public static void detectText(String filePath, PrintStream out) throws Exception, IOException {
  List<AnnotateImageRequest> requests = new ArrayList<>();

  ByteString imgBytes = ByteString.readFrom(new FileInputStream(filePath));

  Image img = Image.newBuilder().setContent(imgBytes).build();
  Feature feat = Feature.newBuilder().setType(Type.TEXT_DETECTION).build();
  AnnotateImageRequest request =
      AnnotateImageRequest.newBuilder().addFeatures(feat).setImage(img).build();
  requests.add(request);

  try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) {
    BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests);
    List<AnnotateImageResponse> responses = response.getResponsesList();

    for (AnnotateImageResponse res : responses) {
      if (res.hasError()) {
        out.printf("Error: %s\n", res.getError().getMessage());
        return;
      }

      // For full list of available annotations, see http://g.co/cloud/vision/docs
      for (EntityAnnotation annotation : res.getTextAnnotationsList()) {
        out.printf("Text: %s\n", annotation.getDescription());
        out.printf("Position : %s\n", annotation.getBoundingPoly());
      }
    }
  }
}