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.vcard; 17 18 import android.content.ComponentName; 19 import android.net.Uri; 20 import android.os.IBinder; 21 import androidx.core.content.FileProvider; 22 import android.util.Log; 23 24 import com.android.contacts.R; 25 import com.android.contactsbind.FeedbackHelper; 26 27 import java.io.File; 28 import java.io.IOException; 29 import java.text.SimpleDateFormat; 30 import java.util.Date; 31 import java.util.Locale; 32 33 /** 34 * This activity connects to VCardService, creates a .vcf file in cache directory and send export 35 * request with the file URI so as to write contacts data to the file in background. 36 */ 37 public class ShareVCardActivity extends ExportVCardActivity { 38 private static final String LOG_TAG = "VCardShare"; 39 private final String EXPORT_FILE_PREFIX = "vcards_"; 40 private final long A_DAY_IN_MILLIS = 1000 * 60 * 60 * 24; 41 42 @Override onServiceConnected(ComponentName name, IBinder binder)43 public synchronized void onServiceConnected(ComponentName name, IBinder binder) { 44 if (DEBUG) Log.d(LOG_TAG, "connected to service, requesting a destination file name"); 45 mConnected = true; 46 mService = ((VCardService.MyBinder) binder).getService(); 47 48 clearExportFiles(); 49 50 final File file = getLocalFile(); 51 try { 52 file.createNewFile(); 53 } catch (IOException e) { 54 FeedbackHelper.sendFeedback(this, LOG_TAG, "Failed to create .vcf file", e); 55 finish(); 56 return; 57 } 58 59 final Uri contentUri = FileProvider.getUriForFile(this, 60 getString(R.string.contacts_file_provider_authority), file); 61 if (DEBUG) Log.d(LOG_TAG, "exporting to " + contentUri); 62 63 final ExportRequest request = new ExportRequest(contentUri); 64 // The connection object will call finish(). 65 mService.handleExportRequest(request, new NotificationImportExportListener( 66 ShareVCardActivity.this)); 67 finish(); 68 } 69 70 /** 71 * Delete the files (that are untouched for more than 1 day) in the cache directory. 72 * We cannot rely on VCardService to delete export files because it will delete export files 73 * right after finishing writing so no files could be shared. Therefore, our approach to 74 * deleting export files is: 75 * 1. put export files in cache directory so that Android may delete them; 76 * 2. manually delete the files that are older than 1 day when service is connected. 77 */ clearExportFiles()78 private void clearExportFiles() { 79 for (File file : getCacheDir().listFiles()) { 80 final long ageInMillis = System.currentTimeMillis() - file.lastModified(); 81 if (file.getName().startsWith(EXPORT_FILE_PREFIX) && ageInMillis > A_DAY_IN_MILLIS) { 82 file.delete(); 83 } 84 } 85 } 86 getLocalFile()87 private File getLocalFile() { 88 final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US); 89 final String currentDateString = dateFormat.format(new Date()).toString(); 90 final String localFilename = EXPORT_FILE_PREFIX + currentDateString + ".vcf"; 91 return new File(getCacheDir(), localFilename); 92 } 93 }