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如何检查使用 GoogleDrive API 的上传进度？

service.files() . insert(body, mediaContent).execute(); 只返回一个文件，我们可以检查该文件是否已完全上传。

但是我需要实时检查进度（至少每秒左右），无论如何要这样做？

对于下载部分，我认为我们可以手动比较我们已经从输入流中读取的字节数与总文件大小，然后计算当前进度。

但这是正确的方法吗？还是有其他更好的检查进度的方法？

private void saveFileToDrive() {
    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());
            //startCameraIntent();
          }
        } catch (UserRecoverableAuthIOException e) {
          startActivityForResult(e.getIntent(), REQUEST_AUTHORIZATION);
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    });
    t.start();
  }

编辑：使用此代码http://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&name=based-on-1.12&r=08555cd2a27be66dc97505e15c60853f47d84b5a

如果我使用可恢复上传，我现在可以取得一些进展，我将 chunksize 设置为 1MB。但是现在有两个问题。

1) 可恢复上传比单次上传慢很多，因为中间会停很多次，每次只发送1MB。
如果我将 chunksize 设置为更高，那么对于较小的文件，它根本不会显示进度。
所以，可恢复上传的进展并不是我真正想要的。我想要单次上传的进度。

2）如果我将块大小设置为 1MB，对于一个普通的 10MB 文件，我的上传总是在 70% 左右失败。
如果我将 chunksize 设置为 10MB，那么它会成功，但我不会看到任何进展。

Drive.Files.Insert insert = service.files().insert(body, mediaContent);
MediaHttpUploader uploader = insert.getMediaHttpUploader();
uploader.setDirectUploadEnabled(false);
uploader.setChunkSize(10*1024*1024); // previously I am using 1000000 thats why it won't work
uploader.setProgressListener(new FileUploadProgressListener());
com.google.api.services.drive.model.File f = insert.execute();

LogCat 错误：

11-27 19:23:26.927: D/FileUploadProgressListener(11527): Upload is In Progress: 0.5235538030501893
11-27 19:23:33.692: D/FileUploadProgressListener(11527): Upload is In Progress: 0.56095050326806
11-27 19:23:38.294: D/FileUploadProgressListener(11527): Upload is In Progress: 0.5983472034859306
11-27 19:23:50.583: D/FileUploadProgressListener(11527): Upload is In Progress: 0.6357439037038013
11-27 19:23:55.091: D/FileUploadProgressListener(11527): Upload is In Progress: 0.673140603921672
11-27 19:24:05.130: D/FileUploadProgressListener(11527): Upload is In Progress: 0.7105373041395426
11-27 19:24:17.005: D/FileUploadProgressListener(11527): Upload is In Progress: 0.7479340043574133
11-27 19:24:28.888: D/FileUploadProgressListener(11527): Upload is In Progress: 0.785330704575284
11-27 19:24:28.896: W/HttpTransport(11527): exception thrown while executing request
11-27 19:24:28.896: W/HttpTransport(11527): java.io.IOException: unexpected end of stream
11-27 19:24:28.896: W/HttpTransport(11527):     at libcore.net.http.FixedLengthOutputStream.close(FixedLengthOutputStream.java:58)
11-27 19:24:28.896: W/HttpTransport(11527):     at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:88)
11-27 19:24:28.896: W/HttpTransport(11527):     at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:980)
11-27 19:24:28.896: W/HttpTransport(11527):     at com.google.api.client.googleapis.media.MediaHttpUploader.upload(MediaHttpUploader.java:293)
11-27 19:24:28.896: W/HttpTransport(11527):     at com.google.api.services.drive.Drive$Files$Insert.executeUnparsed(Drive.java:309)
11-27 19:24:28.896: W/HttpTransport(11527):     at com.google.api.services.drive.Drive$Files$Insert.execute(Drive.java:331)
4

3 回答 3

12

进度监听器：

private class FileUploadProgressListener implements MediaHttpUploaderProgressListener {

    private String mFileUploadedName;

    public FileUploadProgressListener(String fileName) {
        mFileUploadedName = fileName;
    }

    @Override
    public void progressChanged(MediaHttpUploader mediaHttpUploader) throws IOException {
        if (mediaHttpUploader == null) return;
        switch (mediaHttpUploader.getUploadState()) {
            case INITIATION_STARTED:
            //System.out.println("Initiation has started!");
                break;
            case INITIATION_COMPLETE:
            //System.out.println("Initiation is complete!");
                break;
            case MEDIA_IN_PROGRESS:
                double percent = mediaHttpUploader.getProgress() * 100;
                if (Ln.DEBUG) {
                    Log.d(Ln.TAG, "Upload to Dropbox: " + mFileUploadedName + " - " + String.valueOf(percent) + "%");
                }
                notif.setProgress(percent, mFileUploadedName).fire();
                break;
            case MEDIA_COMPLETE:
            //System.out.println("Upload is complete!");
        }
    }
}

更多信息在这里： https ://code.google.com/p/google-api-java-client/wiki/MediaUpload

直接媒体上传将在一个请求中上传整个媒体内容，而不是可以在多个请求中上传的可恢复媒体上传协议。

直接上传会减少 HTTP 请求的数量，但 会增加大型媒体上传失败的变化（例如连接失败）。

由于库的架构，您必须在块和进度或没有进度的一步之间进行选择。最小的块大小应该可以改善事情。可能的更小的块：

setChunkSize(MediaHttpUploader.MINIMUM_CHUNK_SIZE)

希望能帮助到你！

于 2012-12-25T14:11:39.057 回答
3

关于块大小，它必须是 MediaHttpUploader.MINIMUM_CHUNK_SIZE 的倍数，这就是它与您之前的值出错的原因。

于 2013-07-18T00:12:03.723 回答
0

CloudRail SDK 的方法与原始方法略有不同。以下 ProgressInputStream 可用于上传和下载进度指示。

class ProgressInputStream extends InputStream {

  private InputStream stream;
  private ProgressListener progressListener;
  private long offset = 0;

  public ProgressInputStream(InputStream stream, UploadProgressListener progressListener) {
    this.stream = stream;
    this.progressListener = progressListener;
  }

  @Override
  public int read() throws IOException {
    int res = this.stream.read();
    this.progressListener.onProgressChanged(++this.offset);

    return res;
  }

  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    int res = this.stream.read(b, off, len);
    this.offset += res;
    this.progressListener.onProgressChanged(this.offset);

    return res;
  }

  // You might need to override additional methods but you can just
  // call the corresponding method on the stream property

  public interface ProgressListener {
    void onProgressChanged(long bytes);
  }
}

完整的教程可以在这里找到。

于 2017-03-07T18:41:14.107 回答