Question

我有以下代码

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();
  }

事情就是上传永无止境。由于图像不太大，这很奇怪

我猜我是否可以通过原装Drive App上传它，它会更快完成。

1）如何显示上传进度？

2）如何在上传完成后在同一个Activity中进行回调？

Answer 1

从Google云端硬盘下载文件：

您可以使用AsyncTask，您可以在其中从网址获取输入流，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);

}

您可以使用固有的Google云端硬盘下载监听器，可以使用插入对象进行设置。

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驱动器，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;
      }
    }
  }

如何在我的Android应用中显示上传到Google云端硬盘的进度？

1 个答案: