1 /* 2 * Copyright (C) 2008 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 17 package com.android.email.activity; 18 19 import com.android.email.AccountBackupRestore; 20 import com.android.email.Email; 21 import com.android.email.ExchangeUtils; 22 import com.android.email.activity.setup.AccountSetupBasics; 23 import com.android.email.provider.EmailContent; 24 import com.android.email.provider.EmailContent.Mailbox; 25 26 import android.app.Activity; 27 import android.content.Intent; 28 import android.database.Cursor; 29 import android.os.Bundle; 30 31 /** 32 * The Welcome activity initializes the application and decides what Activity 33 * the user should start with. 34 * If no accounts are configured the user is taken to the AccountSetupBasics Activity where they 35 * can configure an account. 36 * If a single account is configured the user is taken directly to the MessageList for 37 * the INBOX of that account. 38 * If more than one account is configured the user is taken to the AccountFolderList Activity so 39 * they can select an account. 40 */ 41 public class Welcome extends Activity { 42 43 /** 44 * Launch this activity. Note: It's assumed that this activity is only called as a means to 45 * 'reset' the UI state; Because of this, it is always launched with FLAG_ACTIVITY_CLEAR_TOP, 46 * which will drop any other activities on the stack (e.g. AccountFolderList or MessageList). 47 */ actionStart(Activity fromActivity)48 public static void actionStart(Activity fromActivity) { 49 Intent i = new Intent(fromActivity, Welcome.class); 50 i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 51 fromActivity.startActivity(i); 52 } 53 54 @Override onCreate(Bundle icicle)55 public void onCreate(Bundle icicle) { 56 super.onCreate(icicle); 57 58 // Reset the "accounts changed" notification, now that we're here 59 Email.setNotifyUiAccountsChanged(false); 60 61 // Quickly check for bulk upgrades (from older app versions) and switch to the 62 // upgrade activity if necessary 63 if (UpgradeAccounts.doBulkUpgradeIfNecessary(this)) { 64 finish(); 65 return; 66 } 67 68 // Restore accounts, if it has not happened already 69 // NOTE: This is blocking, which it should not be (in the UI thread) 70 // We're going to live with this for the short term and replace with something 71 // smarter. Long-term fix: Move this, and most of the code below, to an AsyncTask 72 // and do the DB work in a thread. Then post handler to finish() as appropriate. 73 AccountBackupRestore.restoreAccountsIfNeeded(this); 74 75 // Because the app could be reloaded (for debugging, etc.), we need to make sure that 76 // SyncManager gets a chance to start. There is no harm to starting it if it has already 77 // been started 78 // TODO More completely separate SyncManager from Email app 79 ExchangeUtils.startExchangeService(this); 80 81 // Find out how many accounts we have, and if there's just one, go directly to it 82 Cursor c = null; 83 try { 84 c = getContentResolver().query( 85 EmailContent.Account.CONTENT_URI, 86 EmailContent.Account.ID_PROJECTION, 87 null, null, null); 88 switch (c.getCount()) { 89 case 0: 90 AccountSetupBasics.actionNewAccount(this); 91 break; 92 case 1: 93 c.moveToFirst(); 94 long accountId = c.getLong(EmailContent.Account.CONTENT_ID_COLUMN); 95 MessageList.actionHandleAccount(this, accountId, Mailbox.TYPE_INBOX); 96 break; 97 default: 98 AccountFolderList.actionShowAccounts(this); 99 break; 100 } 101 } finally { 102 if (c != null) { 103 c.close(); 104 } 105 } 106 107 // In all cases, do not return to this activity 108 finish(); 109 } 110 } 111