Java SortableField类代码示例

import com.google.android.gms.drive.query.SortableField; //导入依赖的package包/类
/**
 * Search for a file with the specific name and mimeType
 * @return driveId for the file it if exists.
 */
private DriveId getDriveFile(String fileName, String mimeType) {
    // Find the named file with the specific Mime type.
    Query query = new Query.Builder()
            .addFilter(Filters.and(
                    Filters.eq(SearchableField.TITLE, fileName),
                    Filters.eq(SearchableField.MIME_TYPE, mimeType)))
            .setSortOrder(new SortOrder.Builder()
                    .addSortDescending(SortableField.MODIFIED_DATE)
                    .build())
            .build();

    MetadataBuffer buffer = null;
    try {
        buffer = Drive.DriveApi.getAppFolder(mGoogleApiClient)
                .queryChildren(mGoogleApiClient, query).await().getMetadataBuffer();

        if (buffer != null && buffer.getCount() > 0) {
            LOGD(TAG, "got buffer " + buffer.getCount());
            return buffer.get(0).getDriveId();
        }
        return null;
    } finally {
        if (buffer != null) {
            buffer.close();
        }
    }
}
 

import com.google.android.gms.drive.query.SortableField; //导入依赖的package包/类
private void getBackupsFromDrive() {
    if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {

        final Activity activity = this;
        SortOrder sortOrder = new SortOrder.Builder()
                .addSortDescending(SortableField.MODIFIED_DATE).build();
        Query query = new Query.Builder()
                .addFilter(Filters.eq(SearchableField.TITLE, Constants.EXPORT_REALM_FILE_NAME))
                .addFilter(Filters.eq(SearchableField.TRASHED, false))
                .setSortOrder(sortOrder)
                .build();
        Drive.DriveApi.getAppFolder(mGoogleApiClient)
                .queryChildren(mGoogleApiClient, query)
                .setResultCallback(new ResultCallback<DriveApi.MetadataBufferResult>() {

                    private ArrayList<AutographaGoBackup> backupsArray = new ArrayList<>();

                    @Override
                    public void onResult(@NonNull DriveApi.MetadataBufferResult result) {
                        MetadataBuffer buffer = result.getMetadataBuffer();
                        int size = buffer.getCount();
                        for (int i = 0; i < size; i++) {
                            Metadata metadata = buffer.get(i);
                            DriveId driveId = metadata.getDriveId();
                            Date modifiedDate = metadata.getModifiedDate();
                            long backupSize = metadata.getFileSize();
                            backupsArray.add(new AutographaGoBackup(driveId, modifiedDate, backupSize));
                        }
                        mAdapter = new BackupAdapter(BackupActivity.this, backupsArray);
                        backupRecyclerView.setAdapter(mAdapter);
                    }
                });
    } else {
        showConnectionError();
        reinitializeGoogleApiClient(true, false, false, null);
    }
}
 

import com.google.android.gms.drive.query.SortableField; //导入依赖的package包/类
@Override
public void onConnected(Bundle connectionHint) {
    super.onConnected(connectionHint);
    SortOrder sortOrder = new SortOrder.Builder()
            .addSortAscending(SortableField.TITLE)
            .build();
    Query query = new Query.Builder()
            .setSortOrder(sortOrder)
            .build();
    Drive.DriveApi.query(getGoogleApiClient(), query)
            .setResultCallback(metadataCallback);
}
 

import com.google.android.gms.drive.query.SortableField; //导入依赖的package包/类
private void onDriveClientReady() {
    Log.d(TAG, "Drive API is ready!");

    SharedPreferences preferences = getPreferenceManager().getSharedPreferences();
    String driveFileID = preferences.getString(KEY_BACKUP_FILE_DRIVE_ID_STRING, null);

    if (null == driveFileID) { // This is the first time connecting to drive
        // 1- Check drive contents
        // 2- Ask user to choose a backup to restore if found any
        mDriveResourceClient.getAppFolder()
                .continueWithTask(new Continuation<DriveFolder, Task<MetadataBuffer>>() {
                    @Override
                    public Task<MetadataBuffer> then(@NonNull Task<DriveFolder> task) throws Exception {
                        // Get backup files from drive.
                        SortOrder sortOrder = new SortOrder.Builder()
                                .addSortDescending(SortableField.CREATED_DATE)
                                .build();

                        Query query = new Query.Builder()
                                .addFilter(
                                        Filters.and(
                                                Filters.eq(SearchableField.MIME_TYPE, "application/zip"),
                                                Filters.eq(SearchableField.TITLE, "backup.zip")
                                        )
                                )
                                .setSortOrder(sortOrder)
                                .build();

                        return mDriveResourceClient.queryChildren(task.getResult(), query);
                    }
                })
                .addOnSuccessListener(new OnSuccessListener<MetadataBuffer>() {
                    @Override
                    public void onSuccess(MetadataBuffer metadata) {
                        if (metadata.getCount() != 0) {
                            // Found some backup files saved in the drive.
                            // show user if they want to restore from any of these backups

                            List<DriveFileItem> files = new ArrayList<>(metadata.getCount());
                            for (Metadata m : metadata) {
                                files.add(new DriveFileItem(m));
                                Log.d(TAG, String.format(Locale.getDefault(), "%s %,.2fKB", m.getDriveId().encodeToString(), (m.getFileSize() / 1024f)));
                            }

                            showSelectDriveBackupDialog(files);
                        } else {
                            // No backup found.. Activate the drive backup.
                            setDriveFileId("");
                            activateBackup();
                        }
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        Log.e(TAG, "Cannot query current backups.", e);
                        Toast.makeText(getContext(), R.string.pref_backup_unable_to_list_drive_backups, Toast.LENGTH_SHORT).show();
                    }
                });
    } else {
        activateBackup();
    }

}
 

import com.google.android.gms.drive.query.SortableField; //导入依赖的package包/类
/**
 * Looks for the specified file name (or title).<br><br>
 * 
 * <b>Note</b><br>
 *  Only returns the first found file if there is more than one file
 *  with the same filename/title.
 * 
 * @param fileName	The file name or title of the desired file.
 * @returns DriveFile The desired file or null if there is none. See
 * 					  {@link DriveFile}.
 * 
 */
public synchronized DriveFile sync_getFile(String fileName) throws TBDriveException {
	
	DriveFile driveFile = null;
	
    //Look for a file with title/filename
    SortOrder sortOrder = new SortOrder.Builder()
    	.addSortAscending(SortableField.TITLE)
    	.addSortDescending(SortableField.MODIFIED_DATE).build();
    
	Query query = new Query.Builder().addFilter(
			Filters.and(
					Filters.eq(SearchableField.TITLE, fileName)
					, Filters.eq(SearchableField.TRASHED, false)
					//, Filters.eq(SearchableField.MIME_TYPE, "text/plain")    					
					//, Filters.eq(customPropertyKey, "world")
					)
			)
			.setSortOrder(sortOrder)
	        .build();
	
	MetadataBufferResult result = Drive.DriveApi.query(getGoogleApiClient(), query).await();
	
	if (!result.getStatus().isSuccess()) {
        Log.e(TAG, "Problem while retrieving files: '" + result.getStatus().getStatusMessage() + "'");
        result.release();
        throw new TBDriveException("Problem while retrieving files: '" + result.getStatus().getStatusMessage() + "'");         
    }

	Iterator<Metadata> iterator = result.getMetadataBuffer().iterator();            	
	Metadata mData = null;
	while(iterator.hasNext()) {
		mData = iterator.next();
		
		if(!mData.isFolder()){
			driveFile = Drive.DriveApi.getFile(getGoogleApiClient(), mData.getDriveId());
			if(driveFile==null) {
				//Error getting Drive File from id. Should never happen
				Log.e(TAG, "Problem while retrieving file with DriveId: " + mData.getDriveId());
				result.release();
				throw new TBDriveException("Problem while retrieving file with DriveId: " + mData.getDriveId() + ". Not found in Drive!!");
			}         			
		}
		break; //Should only be one.
	}
	result.release();
	
	return driveFile;
}
 

import com.google.android.gms.drive.query.SortableField; //导入依赖的package包/类
/**
    * Search for a file.
    * 
    * @param fileName	The filename/title to search for.
    * @param callback See {@link TBDriveFileSearchCallback}
    */
public void async_search(String fileName, final TBDriveFileSearchCallback callback) {
	
	final ResultCallback<MetadataBufferResult> metadataBufferCallback = new
               ResultCallback<MetadataBufferResult>() {
           @Override
           public void onResult(MetadataBufferResult result) {
               
           	if (!result.getStatus().isSuccess()) {
                   Log.e(TAG, "Problem while retrieving files: '" + result.getStatus().getStatusMessage() + "'");
                   if(callback!=null) {
   					callback.setErrorCode(ERROR_FILE_SEARCH);
   					callback.setErrorMessage(ERROR_FILE_SEARCH_STRING);
   					callback.setErrorDetails(result.getStatus().getStatusMessage());
   					callback.run();
   				}
                   result.release();
                   return;
               }
           
           	List<FileInfo> searchResults = new ArrayList<FileInfo>();
           	FileInfo fInfo = null;
           	
           	Iterator<Metadata> iterator = result.getMetadataBuffer().iterator();            	
           	Metadata mData = null;
           	while(iterator.hasNext()) {
           		mData = iterator.next();
           		//Files found!
           		DriveFile driveFile = Drive.DriveApi.getFile(getGoogleApiClient(), mData.getDriveId());
           		if(driveFile!=null) {
           			fInfo = new FileInfo(driveFile, mData);
           			searchResults.add(fInfo);
           		}
           	}
           	
           	if(callback!=null) {
       			callback.setSearchResult(searchResults);
       			callback.run();
       		}
           	
           	result.release();
           }
       };
       
	
	//Look for a file with title/filename
       SortOrder sortOrder = new SortOrder.Builder()
       	.addSortAscending(SortableField.TITLE)
       	.addSortDescending(SortableField.MODIFIED_DATE).build();
       
   	Query query = new Query.Builder().addFilter(
   			
   			Filters.and(
   					Filters.eq(SearchableField.TITLE, fileName)
   					, Filters.eq(SearchableField.TRASHED, false)
   					//, Filters.eq(SearchableField.MIME_TYPE, "text/plain")    					
   					//, Filters.eq(customPropertyKey, "world")
   					)
   			)
   			.setSortOrder(sortOrder)
   	        .build();
   	
   	Drive.DriveApi.query(getGoogleApiClient(), query)
   		.setResultCallback(metadataBufferCallback);
}
 

import com.google.android.gms.drive.query.SortableField; //导入依赖的package包/类
/**
    * Search for a file.
    * 
    * @param fileName	The filename/title to search for.
    * @throws TBDriveFileSearchCallback
    */
public List<FileInfo> sync_search(String fileName) throws TBDriveException {
	
	List<FileInfo> searchResults = null;
	
	//Look for a file with title/filename
       SortOrder sortOrder = new SortOrder.Builder()
       	.addSortAscending(SortableField.TITLE)
       	.addSortDescending(SortableField.MODIFIED_DATE).build();
       
   	Query query = new Query.Builder().addFilter(
   			
   			Filters.and(
   					Filters.eq(SearchableField.TITLE, fileName)
   					, Filters.eq(SearchableField.TRASHED, false)
   					//, Filters.eq(SearchableField.MIME_TYPE, "text/plain")    					
   					//, Filters.eq(customPropertyKey, "world")
   					)
   			)
   			.setSortOrder(sortOrder)
   	        .build();
   	
   	MetadataBufferResult result = Drive.DriveApi.query(getGoogleApiClient(), query).await();
   	
   	if (!result.getStatus().isSuccess()) {
           Log.e(TAG, "Problem while retrieving files: '" + result.getStatus().getStatusMessage() + "'");
           result.release();
           throw new TBDriveException("Problem while retrieving files: '" + result.getStatus().getStatusMessage() + "'");
       }
   	
   	searchResults = new ArrayList<FileInfo>();
   	
   	DriveFile driveFile = null;
   	FileInfo fInfo = null;    	            	
   	Metadata mData = null;
   	Iterator<Metadata> iterator = result.getMetadataBuffer().iterator();
   	while(iterator.hasNext()) {
   		mData = iterator.next();
   		driveFile = Drive.DriveApi.getFile(getGoogleApiClient(), mData.getDriveId());
   		if(driveFile!=null) {
   			fInfo = new FileInfo(driveFile, mData);
   			searchResults.add(fInfo);
   		}
   	}
   	result.release();
   	
   	return searchResults;
}