Java tutorial
//package com.java2s; /* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.content.Context; import java.io.File; public class Main { /** * Return the filename for a given attachment. This should be used by any code that is * going to *write* attachments. * * This does not create or write the file, or even the directories. It simply builds * the filename that should be used. */ public static File getAttachmentFilename(Context context, long accountId, long attachmentId) { return new File(getAttachmentDirectory(context, accountId), Long.toString(attachmentId)); } /** * Return the directory for a given attachment. This should be used by any code that is * going to *write* attachments. * * This does not create or write the directory. It simply builds the pathname that should be * used. */ public static File getAttachmentDirectory(Context context, long accountId) { return context.getDatabasePath(accountId + ".db_att"); } }