Welcome.java revision 9fe51f632965f5d085ae45a1089c7c97dcec8881 
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
17package com.android.email.activity;
18
19import com.android.email.AccountBackupRestore;
20import com.android.email.ExchangeUtils;
21import com.android.email.activity.setup.AccountSetupBasics;
22import com.android.email.provider.EmailContent.Account;
23import com.android.email.provider.EmailContent.Mailbox;
24
25import android.app.Activity;
26import android.content.Intent;
27import android.database.Cursor;
28import android.os.Bundle;
29
30/**
31 * The Welcome activity initializes the application and decides what Activity
32 * the user should start with.
33 * If no accounts are configured the user is taken to the AccountSetupBasics Activity where they
34 * can configure an account.
35 * If a single account is configured the user is taken directly to the MessageList for
36 * the INBOX of that account.
37 * If more than one account is configured the user is taken to the AccountFolderList Activity so
38 * they can select an account.
39 */
40public class Welcome extends Activity {
41
42    public static void actionStart(Activity fromActivity) {
43        Intent i = new Intent(fromActivity, Welcome.class);
44        fromActivity.startActivity(i);
45    }
46
47    @Override
48    public void onCreate(Bundle icicle) {
49        super.onCreate(icicle);
50
51        // Restore accounts, if it has not happened already
52        // NOTE:  This is blocking, which it should not be (in the UI thread)
53        // We're going to live with this for the short term and replace with something
54        // smarter.  Long-term fix:  Move this, and most of the code below, to an AsyncTask
55        // and do the DB work in a thread.  Then post handler to finish() as appropriate.
56        AccountBackupRestore.restoreAccountsIfNeeded(this);
57
58        // Because the app could be reloaded (for debugging, etc.), we need to make sure that
59        // SyncManager gets a chance to start.  There is no harm to starting it if it has already
60        // been started
61        // TODO More completely separate SyncManager from Email app
62        ExchangeUtils.startExchangeService(this);
63
64        // Find out how many accounts we have, and if there's just one, go directly to it
65        Cursor c = null;
66        try {
67            c = getContentResolver().query(
68                    Account.CONTENT_URI,
69                    Account.ID_PROJECTION,
70                    null, null, null);
71            switch (c.getCount()) {
72                case 0:
73                    AccountSetupBasics.actionNewAccount(this);
74                    break;
75                case 1:
76                    c.moveToFirst();
77                    long accountId = c.getLong(Account.CONTENT_ID_COLUMN);
78                    MessageList.actionHandleAccount(this, accountId, Mailbox.TYPE_INBOX);
79                    break;
80                default:
81                    AccountFolderList.actionShowAccounts(this);
82                    break;
83            }
84        } finally {
85            if (c != null) {
86                c.close();
87            }
88        }
89
90        // In all cases, do not return to this activity
91        finish();
92    }
93}
94