put up an alert when SMS game opened but SMS is disabled. (Does not

have a button taking you to settings.)

xwords4/android/XWords4/res/values/strings.xml

@@ -1986,4 +1986,8 @@
     <string name="confirm_sms_unlimited">I have an unlimited texting plan</string>
     <string name="confirm_sms_willpay">I will happily pay all charges</string>
 
+    <string name="warn_sms_disabled">SMS is currently disabled, so no
+    moves will be sent for this game.  (If you want to enable SMS, go
+    to Settings->Network game settings.) </string>
+
 </resources>

xwords4/android/XWords4/src/org/eehouse/android/xw4/BoardActivity.java

@@ -1640,6 +1640,7 @@ public class BoardActivity extends XWActivity
                 }
 
                 if ( null != m_xport ) {
+                    warnIfNoTransport();
                     trySendChats();
                     removeNotifications();
                     m_xport.tickle( m_connType );
@@ -1803,6 +1804,17 @@ public class BoardActivity extends XWActivity
         }
     }
 
+    private void warnIfNoTransport()
+    {
+        switch( m_connType ) {
+        case COMMS_CONN_SMS:
+            if ( XWApp.SMSSUPPORTED && !XWPrefs.getSMSEnabled( this ) ) {
+                showOKOnlyDialog( R.string.warn_sms_disabled );
+            }
+            break;
+        }
+    }
+    
     private void trySendChats()
     {
         if ( null != m_jniThread ) {

xwords4/android/XWords4/src/org/eehouse/android/xw4/SMSCheckBoxPreference.java

@@ -57,7 +57,7 @@ public class SMSCheckBoxPreference extends CheckBoxPreference {
     public void setChecked( boolean checked )
     {
         if ( !checked || !m_attached ) {
-            super.setChecked( false );
+            super_setChecked( checked );
         } else {
             m_activity.showDialog( PrefsActivity.CONFIRM_SMS );
         }