我正在开发一款可以从Google云端硬盘登录，下载，上传和显示列表文件的应用。
我发现了来自Google Drive SDK的Java代码，但它运行速度很慢而且不起作用。
我正在阅读solution，但不知道在哪里更改该范围
我的主要活动：
// google
static final int REQUEST_ACCOUNT_PICKER = 1;
static final int REQUEST_AUTHORIZATION = 2;
static final int CAPTURE_IMAGE = 3;
private GoogleAccountCredential credential;
private static Uri fileUri;
private static Drive service;
public void onLoginGoogle(View v) {
credential = GoogleAccountCredential.usingOAuth2(this, DriveScopes.DRIVE);
startActivityForResult(credential.newChooseAccountIntent(), REQUEST_ACCOUNT_PICKER);
}
public void onUploadGoogle(View v) {
Thread t = new Thread(new Runnable() {
@Override
public void run() {
try {
// File's binary content
java.io.File fileContent = new java.io.File("/sdcard/a.jpg");
FileContent mediaContent = new FileContent("image/jpeg", fileContent);
// File's metadata.
com.google.api.services.drive.model.File body = new com.google.api.services.drive.model.File();
body.setTitle(fileContent.getName());
body.setMimeType("image/jpeg");
com.google.api.services.drive.model.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();
}
public void onDownloadGoogle(View v) {
downloadFile();
}
private void downloadFile() {
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
com.google.api.services.drive.model.File file = service.files().get("0B-Iak7O9SfIpYk9zTjZvY2xreVU").execute();
// FileList file = service.files().list().execute();
// List<com.google.api.services.drive.model.File> fileList =
// file.getItems();
// com.google.api.services.drive.model.File fileItem =
// fileList.get(0);
// Log.d("FileID" , fileItem.getId());
// Log.d("Count", "Retreived file list");
if (file.getDownloadUrl() != null && file.getDownloadUrl().length() > 0) {
HttpResponse resp = service.getRequestFactory().buildGetRequest(new GenericUrl(file.getDownloadUrl())).execute();
InputStream inputStream = resp.getContent();
// writeToFile(inputStream);
}
} catch (IOException e) {
Log.e("WriteToFile", e.toString());
e.printStackTrace();
}
}
});
thread.start();
}
List<File> mGFile;
public void onListGoogle(View v) {
AsyncTask<Void, Void, String> task = new AsyncTask<Void, Void, String>() {
@Override
protected String doInBackground(Void... arg0) {
// TODO Auto-generated method stub
try {
mGFile = retrieveAllFiles();
int i = 0;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String result) {
Log.d("Dolphin get glist", String.valueOf(mGFile.size()));
};
};
task.execute();
Log.d("Dolphin counting", "aa");
}
private List<File> retrieveAllFiles() throws IOException {
List<File> result = new ArrayList<File>();
Files.List request = service.files().list();
do {
try {
FileList files = request.execute();
result.addAll(files.getItems());
request.setPageToken(files.getNextPageToken());
} catch (IOException e) {
System.out.println("An error occurred: " + e);
request.setPageToken(null);
}
} while (request.getPageToken() != null && request.getPageToken().length() > 0);
return result;
}
private Drive getDriveService(GoogleAccountCredential credential) {
return new Drive.Builder(AndroidHttp.newCompatibleTransport(), new GsonFactory(), credential).build();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_ACCOUNT_PICKER:
if (resultCode == RESULT_OK && data != null && data.getExtras() != null) {
String accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
if (accountName != null) {
credential.setSelectedAccountName(accountName);
service = getDriveService(credential);
}
}
break;
case REQUEST_AUTHORIZATION:
if (resultCode == Activity.RESULT_OK) {
// saveFileToDrive();
Toast.makeText(this, "Login complete", Toast.LENGTH_SHORT);
} else {
startActivityForResult(credential.newChooseAccountIntent(), REQUEST_ACCOUNT_PICKER);
}
break;
}
}
logcat：
"Application name is not set. Call Builder#setApplicationName."
如何从文件夹中获取文件列表？如果有一个有效的例子，那真是太棒了
答案 0 :(得分：6)
它对我有用：
private List<File> sendRequest(){
List<File> result = new ArrayList<File>();
try{
Files.List request = service.files().list().setQ("trashed = false");
do{
try{
FileList files = request.execute();
result.addAll(files.getItems());
request.setPageToken(files.getNextPageToken());
}
catch(IOException e){
System.out.println("An error occurred: " + e);
request.setPageToken(null);
}
}
while(request.getPageToken() != null
&& request.getPageToken().length() > 0);
}
catch(IOException e1){
e1.printStackTrace();
}
for(File file : result){
Log.d(TAG, "file : " + file.getTitle());
}
return result;
}
如果您需要特定文件夹中的文件，可以尝试此请求：
Files.List request = service.files().list().setQ("'" + folderId + "' in parents and trashed = false");
正如你所说，它很慢，但我不知道如何做得更好。
答案 1 :(得分：1)
var express = require('express')
, request = require('request')
, oauth = require('./oauth')
, app = express();
// Setup middleware
app.use(express.static(__dirname));
// List out file that are in your Google Drive
app.get('/list', function(req, res) {
// Check to see if user has an access_token first
if (oauth.access_token) {
// URL endpoint and params needed to make the API call
var url = 'https://www.googleapis.com/drive/v2/files';
var params = {
access_token: oauth.access_token
};
// Send the API request
request.get({url:url, qs:params}, function(err, resp, body) {
// Handle any errors that may occur
if (err) return console.error("Error occured: ", err);
var list = JSON.parse(body);
if (list.error) return console.error("Error returned from Google: ", list.error);
// Generate output
if (list.items && list.items.length > 0) {
var file = ''
, iconLink = ''
, link = ''
, output = '<h1>Your Google Drive</h1><ul>';
for(var i=0; i<list.items.length; i++) {
file = list.items[i].title;
iconLink = list.items[i].iconLink;
link = list.items[i].alternateLink;
output += '<li style="list-style-image:url('+iconLink+');"><a href="'+link+'" target="_blank">'+file+'</a></li>';
}
output += '</ul>';
//Send output as response
res.writeHead(200, {'Content-Type': 'text/html'});
res.end(output);
} else { // Alternate output if no files exist on Drive
console.log('Could not retrieve any items.');
res.writeHead(200, {'Content-Type': 'text/html'});
res.end('<p>Your drive appears to be empty.</p>')
}
});
// If no access_token was found, start the OAuth flow
} else {
console.log("Could not determine if user was authed. Redirecting to /");
res.redirect('/');
}
});
// Handle OAuth Routes
app.get('/login', oauth.login);
app.get('/callback', oauth.callback);
app.listen(process.env.OPENSHIFT_NODEJS_PORT, process.env.OPENSHIFT_NODEJS_IP);
来自runnable