本文介绍了机器人的AsyncTask上传多个文件收存箱的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想从我的SD上传多个文件到一个dropboxfolder。但问题是没有关于Dropbox的问题：
I would like to upload several files from my SD to a dropboxfolder. but the question is not regarding the dropbox issue:
我有一个文件数组，我想一个上传的文件之一，并非所有在同一时间。
I have a File array and I would like to upload the Files one by one, NOT ALL at the same time.
上传工作正常，因为我做了，通过的文件数组循环，但它们是同时进行的。
the upload works fine since I do a for loop through the File Array, but they are carried out simultaneously.
我想给大约总大小和文件数
I would like to give in the progressdialog information about the total size and numbers of files
有什么建议？
感谢
我通过从MyClass的：
I pass from myClass:
Log.i("toBeUploaded",
" " + Arrays.toString(toBeUploaded));
for (int i = 0; i < toBeUploaded.length; i++) {
Upload upload = new Upload(CalcDBActivity.this,
mDBApi, getIntent().getExtras()
.getString("project")
+ File.separatorChar,
toBeUploaded[i]);
upload.execute();
if (upload.getStatus() == Upload.Status.PENDING) {
// My AsyncTask has not started yet
Log.i("Status pend",
" " + upload.getStatus());
}
if (upload.getStatus() == Upload.Status.RUNNING) {
// My AsyncTask is currently doing work in
// doInBackground()
Log.i("Status run ",
" " + upload.getStatus());
}
if (upload.getStatus() == Upload.Status.FINISHED) {
Log.i("Status Finished",
" " + upload.getStatus());
// My AsyncTask is done and onPostExecute
// was called
}
}
，其中toBeUploaded是文件的数组。
where "toBeUploaded" is the file array.
上传类：
public class Upload extends AsyncTask<Void, Long, Boolean> {
private DropboxAPI<?> mApi;
private String mPath;
private File mFile;
private long mFileLen;
private UploadRequest mRequest;
private Context mContext;
private final ProgressDialog mDialog;
private String mErrorMsg;
public Upload(Context context, DropboxAPI<?> api, String dropboxPath,
File file) {
// We set the context this way so we don't accidentally leak activities
mContext = context.getApplicationContext();
mFileLen = file.length();
mApi = api;
mPath = dropboxPath;
mFile = file;
mDialog = new ProgressDialog(context);
mDialog.setMax(100);
mDialog.setMessage("Uploading " + file.getName());
mDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mDialog.setProgress(0);
mDialog.setButton("Cancel", new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// This will cancel the putFile operation
mRequest.abort();
}
});
mDialog.show();
}
@Override
protected Boolean doInBackground(Void... params) {
try {
// By creating a request, we get a handle to the putFile operation,
// so we can cancel it later if we want to
FileInputStream fis = new FileInputStream(mFile);
String path = mPath + mFile.getName();
mRequest = mApi.putFileOverwriteRequest(path, fis, mFile.length(),
new ProgressListener() {
@Override
public long progressInterval() {
// Update the progress bar every half-second or so
return 500;
}
@Override
public void onProgress(long bytes, long total) {
publishProgress(bytes);
}
});
if (mRequest != null) {
mRequest.upload();
return true;
}
} catch (DropboxUnlinkedException e) {
// This session wasn't authenticated properly or user unlinked
mErrorMsg = "This app wasn't authenticated properly.";
} catch (DropboxFileSizeException e) {
// File size too big to upload via the API
mErrorMsg = "This file is too big to upload";
} catch (DropboxPartialFileException e) {
// We canceled the operation
mErrorMsg = "Upload canceled";
} catch (DropboxServerException e) {
// Server-side exception. These are examples of what could happen,
// but we don't do anything special with them here.
if (e.error == DropboxServerException._401_UNAUTHORIZED) {
// Unauthorized, so we should unlink them. You may want to
// automatically log the user out in this case.
} else if (e.error == DropboxServerException._403_FORBIDDEN) {
// Not allowed to access this
} else if (e.error == DropboxServerException._404_NOT_FOUND) {
// path not found (or if it was the thumbnail, can't be
// thumbnailed)
} else if (e.error == DropboxServerException._507_INSUFFICIENT_STORAGE) {
// user is over quota
} else {
// Something else
}
// This gets the Dropbox error, translated into the user's language
mErrorMsg = e.body.userError;
if (mErrorMsg == null) {
mErrorMsg = e.body.error;
}
} catch (DropboxIOException e) {
// Happens all the time, probably want to retry automatically.
mErrorMsg = "Network error. Try again.";
} catch (DropboxParseException e) {
// Probably due to Dropbox server restarting, should retry
mErrorMsg = "Dropbox error. Try again.";
} catch (DropboxException e) {
// Unknown error
mErrorMsg = "Unknown error. Try again.";
} catch (FileNotFoundException e) {
}
return false;
}
@Override
protected void onProgressUpdate(Long... progress) {
int percent = (int)(100.0*(double)progress[0]/mFileLen + 0.5);
mDialog.setProgress(percent);
}
@Override
protected void onPostExecute(Boolean result) {
mDialog.dismiss();
if (result) {
showToast("Image successfully uploaded");
} else {
showToast(mErrorMsg);
}
}
private void showToast(String msg) {
Toast error = Toast.makeText(mContext, msg, Toast.LENGTH_LONG);
error.show();
}
}
推荐答案
将for循环中的主类：
Move the for-loop in the main class:
Log.i("toBeUploaded", " " + Arrays.toString(toBeUploaded));
Upload upload = new Upload(CalcDBActivity.this,
mDBApi,
getIntent().getExtras().getString("project") + File.separatorChar,
toBeUploaded);
upload.execute();
进入上传类：
into the upload class:
public class Upload extends AsyncTask<Void, Long, Boolean> {
private DropboxAPI<?> mApi;
private String mPath;
private UploadRequest mRequest;
private Context mContext;
private ProgressDialog mDialog;
private String mErrorMsg;
//new class variables:
private int mFilesUploaded;
private File[] mFilesToUpload;
private int mCurrentFileIndex;
public Upload(Context context, DropboxAPI<?> api, String dropboxPath, File[] filesToUpload) {
// We set the context this way so we don't accidentally leak activities
mContext = context.getApplicationContext();
mApi = api;
mPath = dropboxPath;
//set number of files uploaded to zero.
mFilesUploaded = 0;
mFilesToUpload = filesToUpload;
mCurrentFileIndex = 0;
mDialog = new ProgressDialog(context);
mDialog.setMax(100);
mDialog.setMessage("Uploading file 1 / " + filesToUpload.length);
mDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mDialog.setProgress(0);
mDialog.setButton("Cancel", new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
cancel(true);
}
});
mDialog.show();
}
@Override
protected Boolean doInBackground(Void... params) {
try {
for (int i = 0; i < mToBeUploaded.length; i++) {
mCurrentFileIndex = i;
File file = mToBeUploaded[i];
// By creating a request, we get a handle to the putFile operation,
// so we can cancel it later if we want to
FileInputStream fis = new FileInputStream(file);
String path = mPath + file.getName();
mRequest = mApi.putFileOverwriteRequest(path, fis, file.length(),
new ProgressListener() {
@Override
public long progressInterval() {
// Update the progress bar every half-second or so
return 500;
}
@Override
public void onProgress(long bytes, long total) {
if(isCancelled()) {
// This will cancel the putFile operation
mRequest.abort();
}
else {
publishProgress(bytes);
}
}
});
mRequest.upload();
if(!isCancelled) {
mFilesUploaded++;
}
else {
return false;
}
}
return true;
} catch (DropboxUnlinkedException e) {
// This session wasn't authenticated properly or user unlinked
mErrorMsg = "This app wasn't authenticated properly.";
} catch (DropboxFileSizeException e) {
// File size too big to upload via the API
mErrorMsg = "This file is too big to upload";
} catch (DropboxPartialFileException e) {
// We canceled the operation
mErrorMsg = "Upload canceled";
} catch (DropboxServerException e) {
// Server-side exception. These are examples of what could happen,
// but we don't do anything special with them here.
if (e.error == DropboxServerException._401_UNAUTHORIZED) {
// Unauthorized, so we should unlink them. You may want to
// automatically log the user out in this case.
} else if (e.error == DropboxServerException._403_FORBIDDEN) {
// Not allowed to access this
} else if (e.error == DropboxServerException._404_NOT_FOUND) {
// path not found (or if it was the thumbnail, can't be
// thumbnailed)
} else if (e.error == DropboxServerException._507_INSUFFICIENT_STORAGE) {
// user is over quota
} else {
// Something else
}
// This gets the Dropbox error, translated into the user's language
mErrorMsg = e.body.userError;
if (mErrorMsg == null) {
mErrorMsg = e.body.error;
}
} catch (DropboxIOException e) {
// Happens all the time, probably want to retry automatically.
mErrorMsg = "Network error. Try again.";
} catch (DropboxParseException e) {
// Probably due to Dropbox server restarting, should retry
mErrorMsg = "Dropbox error. Try again.";
} catch (DropboxException e) {
// Unknown error
mErrorMsg = "Unknown error. Try again.";
} catch (FileNotFoundException e) {
}
return false;
}
@Override
protected void onProgressUpdate(Long... progress) {
Long totalBytes = 0;
Long bytesUploaded = 0;
for(int i=0;i<mFilesToUpload.length;i++) {
Long bytes = mFilesToUpload[i].length()
totalBytes += bytes;
if(i < mCurrentFileIndex) {
bytesUploaded += bytes;
}
}
bytesUploaded += progress[0];
mDialog.setMessage("Uploading file " + (mCurrentFileIndex+1) + " / " + filesToUpload.length);
mDialog.setProgress((bytesUploaded / totalBytes) * 100);
}
@Override
protected void onPostExecute(Boolean result) {
mDialog.dismiss();
if (result) {
showToast("Image successfully uploaded");
} else {
showToast(mErrorMsg);
}
}
private void showToast(String msg) {
Toast error = Toast.makeText(mContext, msg, Toast.LENGTH_LONG);
error.show();
}
}
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