Merge "Don't crash in EmailActivity if no accounts exist" into ics-mr1

src/com/android/email/MessageListContext.java

@@ -78,6 +78,9 @@ public class MessageListContext implements Parcelable {
         } else {
             if (accountId == Account.NO_ACCOUNT) {
                 accountId = Account.getDefaultAccountId(context);
+                if (accountId == Account.NO_ACCOUNT) {
+                    return null;
+                }
             }
             if (mailboxId == Mailbox.NO_MAILBOX) {
                 mailboxId = (accountId == Account.ACCOUNT_ID_COMBINED_VIEW)

src/com/android/email/activity/EmailActivity.java

@@ -199,19 +199,22 @@ public class EmailActivity extends Activity implements View.OnClickListener, Fra
         if (savedInstanceState != null) {
             mUIController.onRestoreInstanceState(savedInstanceState);
         } else {
-            initFromIntent();
+            final Intent intent = getIntent();
+            final MessageListContext viewContext = MessageListContext.forIntent(this, intent);
+            if (viewContext == null) {
+                // This might happen if accounts were deleted on another thread, and there aren't
+                // any remaining
+                Welcome.actionStart(this);
+                finish();
+                return;
+            } else {
+                final long messageId = intent.getLongExtra(EXTRA_MESSAGE_ID, Message.NO_MESSAGE);
+                mUIController.open(viewContext, messageId);
+            }
         }
         mUIController.onActivityCreated();
     }
 
-    private void initFromIntent() {
-        final Intent intent = getIntent();
-        final MessageListContext viewContext = MessageListContext.forIntent(this, intent);
-        final long messageId = intent.getLongExtra(EXTRA_MESSAGE_ID, Message.NO_MESSAGE);
-
-        mUIController.open(viewContext, messageId);
-    }
-
     @Override
     protected void onSaveInstanceState(Bundle outState) {
         if (Logging.DEBUG_LIFECYCLE && Email.DEBUG) {