检查上传和下载的进度（适用于Android或Java的Google Drive API）

Question

如何检查使用GoogleDrive API的上传进度？

的 。service.files（）插入（身体，mediaContent）.execute（）; 仅返回一个 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（至少每秒一次），还是要这样做？

对于下载部分，我认为我们可以手动比较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？还是有其他更好的方式检查进度？

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 断点续传 ，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要慢得多，因为可恢复上传在两次之间进行了多次，每次仅发送1MB。
如果我将chunksize设置为更高，则对于较小的文件根本不会显示进度。
因此，可恢复上传的进度并不是我真正想要的。我想要单次上传的进度。

2）如果我将chunksize设置为大约1MB，则对于正常的10MB文件，我的上传总是 失败 ，大约 失败 率为70％。
如果我将chunksize设置为10MB，那么它将成功，但是我看不到任何进展。

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)

Answer 1

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!");
        }
    }
}

此处的更多信息：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。

直接上载减少了HTTP请求的数量，但 增加 了大型媒体上载 失败的更改 （例如，连接失败）。

由于库的体系结构，您必须在块和进度之间进行选择，或者在没有进度的情况下进行选择。最小的块大小应该可以改善情况。较小的块：

setChunkSize(MediaHttpUploader.MINIMUM_CHUNK_SIZE)

希望能帮助到你！