java - 如何在我的 Android 应用程序中显示上传到 Google Drive 的进度？

Question

我有以下代码

它应该将图像从我的 Android 设备上传到我的 Google 云端硬盘。

  private void saveFileToDrive() {

      progressDialog = ProgressDialog.show(this, "", "Loading...");

    Thread t = new Thread(new Runnable() {
      @Override
      public void run() {
        try {
          // File's binary content
          java.io.File fileContent = new java.io.File(fileUri.getPath());
          FileContent mediaContent = new FileContent("image/jpeg", fileContent);

          // File's metadata.
          File body = new File();
          body.setTitle(fileContent.getName());
          body.setMimeType("image/jpeg");

          File file = service.files().insert(body, mediaContent).execute();
          if (file != null) {
            showToast("Photo uploaded: " + file.getTitle());

            progressDialog.dismiss();
            //startCameraIntent();
          }
        } catch (UserRecoverableAuthIOException e) {
          startActivityForResult(e.getIntent(), REQUEST_AUTHORIZATION);
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    });
    t.start();
  }

问题是上传永远不会结束。这很奇怪，因为图像不太大

我想如果我通过原始云端硬盘应用程序上传它，速度会更快。

1) 如何显示上传进度？

2)上传完成后如何在同一个Activity中进行回调？

Answer 1

从 Google 云端硬盘下载文件:

1. 您可以使用 AsyncTask，在其中可以从 url 获取输入流，并编写一个 while 循环来读取每一行并在对话框中显示下载的数据，如下所示。

   @Override
   protected Boolean doInBackground(FilesObject... files) {
   // getting an input Stream.
   HttpResponse resp = service.getRequestFactory()
           .buildGetRequest(new GenericUrl(file.SourceImageUrl)).execute();
   fileSize = resp.getHeaders().getContentLength();
   if (fileSize != -1) {
       fileSizeReadableString = DiskSpaceUtil.readableFileSize(fileSize);
   }
   InputStream is = resp.getContent();
   
   // publishing the progress in a dialog.
   int completed = 0;
   while ((length = inputStream.read(buffer)) > 0) {
       if (!this.isCancelled()) {
           completed += length;
           fOutputStream.write(buffer, 0, length);
           publishProgress(completed);
       } else {
           fOutputStream.flush();
           fOutputStream.close();
           inputStream.close();
           return;
       }
   }
   
   @Override
   protected void onProgressUpdate(Integer... values) {
   
       sendShowloader("Downloading file ... \n"
               + DiskSpaceUtil.readableFileSize(number) + " of "
               + fileSizeReadableString);
   
   }
   

2. 您可以使用固有的 Google Drive 的下载监听器，该监听器可以通过插入对象进行设置。

将文件上传到 Google 云端硬盘:

我们可以使用 Google 自己的 MediaHttpUploaderProgressListener 实现将文件上传到 Google Drive，如下所示:

    { // ... Inside some thread

    java.io.File fil = new java.io.File(file.SourceImageUrl);
    InputStream is = new FileInputStream(fil);

    InputStreamContent mediaContent = new InputStreamContent(file.mimeType, is);
            mediaContent.setLength(fil.length());

    // File's metadata.
    File body = new File();
    body.setTitle(file.FileTitle);
    body.setMimeType(file.mimeType);
    body.setParents(parents);
    body.setDescription("Content Uploaded to "+ DriveName);
    // Inserting the Remote Resource into Google Drive
    File destFile = null;

    if(fil.length() > 5 * 1024 * 1024)
    {
        // Resumable Uploads when the file size exceeds a file size of 5 MB.
        // check link : 
        // 1) https://code.google.com/p/google-api-java-client/source/browse/drive-cmdline-sample/src/main/java/com/google/api/services/samples/drive/cmdline/DriveSample.java?repo=samples&r=08555cd2a27be66dc97505e15c60853f47d84b5a
        // 2) http://stackoverflow.com/questions/15970423/uploading-downloading-of-large-size-file-to-google-drive-giving-error

        Insert insert = mService.files().insert(body, mediaContent);
        MediaHttpUploader uploader = insert.getMediaHttpUploader();
        uploader.setDirectUploadEnabled(false);
        uploader.setProgressListener(new FileUploadProgressListener());
        destFile = insert.execute();

    }   
    else
    {
        // Else we go by Non Resumable Uploads, which is safe for small uploads.
        destFile = mService.files().insert(body, mediaContent).execute();
    }

    ... }

    // Now the implementation of FileUploadProgressListener which extends MediaHttpUploaderProgressListener

public static class FileUploadProgressListener implements MediaHttpUploaderProgressListener {

    public void progressChanged(MediaHttpUploader uploader) throws IOException {
      switch (uploader.getUploadState()) {
        case INITIATION_STARTED:
          postToDialog("Initiation Started");
          break;
        case INITIATION_COMPLETE:
          postToDialog("Initiation Completed");
          break;
        case MEDIA_IN_PROGRESS:
          // postToDialog("Upload in progress");
          postToDialog("Upload percentage: " + uploader.getProgress());
          break;
        case MEDIA_COMPLETE:
          postToDialog("Upload Completed!");
          break;

        case NOT_STARTED :
            postToDialog("Not Started!");
            break;
      }
    }
  }