Question

如何查看使用GoogleDrive API的上传进度？

service.files（）。insert（body，mediaContent）.execute（）; 只返回 文件 < / strong>我们可以检查文件是否完全上传。

但我需要实时检查进度（至少每秒钟左右），无论如何要做到这一点？

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到总文件大小，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(); }

已编辑：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。但现在有两个问题。

1）可恢复上传比单次上传慢得多，因为它在两次之间停止很多次，每次只发送1MB。如果我将chunksize设置为更高，那么它对于较小的文件根本不会显示进度因此，可恢复上传的进展并不是我真正想要的。我想在单次上传方面取得进展。

2）如果我将chunksize设置为大约1MB，那么对于正常的10MB文件，我的上传始终失败大约70％。
如果我将chunksize设置为10MB然后它会成功，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)

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!"); } } }

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

直接媒体上传会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。

执行直接上传可以减少HTTP请求的数量   通过大量媒体上传（例如，增加失败的变化   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选择一步。最小的块大小应该改善事物。更小的块可能：

setChunkSize(MediaHttpUploader.MINIMUM_CHUNK_SIZE)

希望它有所帮助！

Answer 2

关于块大小，它必须是MediaHttpUploader.MINIMUM_CHUNK_SIZE的倍数，这就是为什么它与之前的值有误。

Answer 3

使用CloudRail SDK而不是原始方法略有不同。以下ProgressInputStream可用于上载和下载进度指示。

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);
  }
}

可以找到完整的教程here。

检查上传和进度的进度下载（适用于Android或Java的Google Drive API）

3 个答案: