1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.contacts.common.vcard; 17 18 import android.content.ComponentName; 19 import android.net.Uri; 20 import android.os.IBinder; 21 import android.support.v4.content.FileProvider; 22 import android.util.Log; 23 24 import com.android.contacts.common.R; 25 26 import java.io.File; 27 import java.io.IOException; 28 import java.text.SimpleDateFormat; 29 import java.util.Date; 30 import java.util.Locale; 31 32 /** 33 * This activity connects to VCardService, creates a .vcf file in cache directory and send export 34 * request with the file URI so as to write contacts data to the file in background. 35 */ 36 public class ShareVCardActivity extends ExportVCardActivity { 37 private static final String LOG_TAG = "VCardShare"; 38 private final String EXPORT_FILE_PREFIX = "vcards_"; 39 private final long A_DAY_IN_MILLIS = 1000 * 60 * 60 * 24; 40 41 @Override onServiceConnected(ComponentName name, IBinder binder)42 public synchronized void onServiceConnected(ComponentName name, IBinder binder) { 43 if (DEBUG) Log.d(LOG_TAG, "connected to service, requesting a destination file name"); 44 mConnected = true; 45 mService = ((VCardService.MyBinder) binder).getService(); 46 47 clearExportFiles(); 48 49 final File file = getLocalFile(); 50 try { 51 file.createNewFile(); 52 } catch (IOException e) { 53 Log.e(LOG_TAG, "Failed to create .vcf file, because: " + e); 54 unbindAndFinish(); 55 return; 56 } 57 58 final Uri contentUri = FileProvider.getUriForFile(this, 59 getString(R.string.contacts_file_provider_authority), file); 60 if (DEBUG) Log.d(LOG_TAG, "exporting to " + contentUri); 61 62 final ExportRequest request = new ExportRequest(contentUri); 63 // The connection object will call finish(). 64 mService.handleExportRequest(request, new NotificationImportExportListener( 65 ShareVCardActivity.this)); 66 unbindAndFinish(); 67 } 68 69 /** 70 * Delete the files (that are untouched for more than 1 day) in the cache directory. 71 * We cannot rely on VCardService to delete export files because it will delete export files 72 * right after finishing writing so no files could be shared. Therefore, our approach to 73 * deleting export files is: 74 * 1. put export files in cache directory so that Android may delete them; 75 * 2. manually delete the files that are older than 1 day when service is connected. 76 */ clearExportFiles()77 private void clearExportFiles() { 78 for (File file : getCacheDir().listFiles()) { 79 final long ageInMillis = System.currentTimeMillis() - file.lastModified(); 80 if (file.getName().startsWith(EXPORT_FILE_PREFIX) && ageInMillis > A_DAY_IN_MILLIS) { 81 file.delete(); 82 } 83 } 84 } 85 getLocalFile()86 private File getLocalFile() { 87 final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US); 88 final String currentDateString = dateFormat.format(new Date()).toString(); 89 final String localFilename = EXPORT_FILE_PREFIX + currentDateString + ".vcf"; 90 return new File(getCacheDir(), localFilename); 91 } 92 }