Exchange: Fix NPE caused by the nonexistent account

During the action of syncing in onPerformSync(), if the querying
account is deleted, content resolver will return a null cursor.
When onPerformSync() continues to access this null cursor without
check, NPE is thrown.

Need to check the cursor. If it is null, there will be nothing to
sync. So stop the performance and return.

CRs-fixed: 655249

Change-Id: I857d800266a174ff1e94ab6ee2f959dcc9e5f258

1 files changed, 4 insertions, 0 deletions

diff --git a/src/com/android/exchange/service/EmailSyncAdapterService.java b/src/com/android/exchange/service/EmailSyncAdapterService.java
index 5aea0169..3dac3e2a 100644
--- a/src/com/android/exchange/service/EmailSyncAdapterService.java
+++ b/src/com/android/exchange/service/EmailSyncAdapterService.java
@@ -673,6 +673,10 @@ public class EmailSyncAdapterService extends AbstractSyncAdapterService {
             final Account account;
             final Cursor accountCursor = cr.query(Account.CONTENT_URI, Account.CONTENT_PROJECTION,
                     AccountColumns.EMAIL_ADDRESS + "=?", new String[] {acct.name}, null);
+            if (accountCursor == null) {
+                // The account with the name acct.name does not exist.
+                return;
+            }
             try {
                 if (!accountCursor.moveToFirst()) {
                     // Could not load account.