我有以下代码
这应该将图像从我的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();
}
问题是上传永无止境。图像不太大，这很奇怪
而且我想如果我可以通过原始的Drive App上传它，则可以更快地完成。
1）如何显示上传进度？
2）上传完成后，如何在同一活动中进行回调？
最佳答案
从Google云端硬盘下载文件：
您可以使用AsyncTask，在其中您可以从url获取输入流，并编写一个while循环以读取每一行并在对话框上显示下载的数据，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云端硬盘的下载监听器，可以通过插入对象进行设置。
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;
}
}
}