检查上传和下载进度（适用于 Android 或 Java 的 Google Drive API）-星河码客

如何检查使用 GoogleDrive API 的上传进度？

的。service.files（）插入（身体，mediaContent）.execute（）; 只返回一个文件，我们可以检查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？或者有其他更好的方法来检查进度？

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）可续传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，那么它根本不会显示较小文件的进度。
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展。

2) 如果我将 chunksize 设置为大约 1MB，对于一个普通的 10MB 文件，我的上传总是在大约 70% 时失败。
如果我将 chunksize 设置为 10MB 那么它会成功，但我看不到任何进展。

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)

IT小君

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!");
        }
    }
}

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 Chunk 大小应该会有所改善。可能的小块：

setChunkSize(MediaHttpUploader.MINIMUM_CHUNK_SIZE)

希望能帮助到你！

2021-12-31T01:01:34 回复

CloudRail SDK 的一种稍微不同的方法，而不是原始方法。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);
  }
}

完整教程可以在这里找到。

2021-12-31T01:01:35 回复