My application on Treo 600, switches to Native Phone application back and forth many times. However when the application is going out of the application to native phone, white screen is shown. This is happening inconsistently and we are unable to track it down. Can anybody assist in this regard?
This text is in the "Known Bugs" section of the Treo 600 development guide, from pluggedin.palmone.com:
*** Screen Depth and the Phone Application
Several applications are registering for Palm OS system notifications and changing the screen depth to 8-bit when they receive these notifications. Palm OS blanks out the screen whenever the bit depth is changed. This in turn can cause the Phone Application dialpad to blanks out. Unfortunately, the phone app is not built to redraw the dialpad because there is no reason for it to do so. It is lucky that the title bar redraws or updates every second, so that it is possible to see that the phone is alive. Otherwise it would be a totally blank screen. What notification happens when we go into service? On a CDMA device, if you have 'Enable Network Time' selected (default) we update the time when you come into service. The system will send out a notification every time the system time is updated. Some applications switch the screen depth when they get these notifications. These application could be fixed to only switch screen depth when a user enters the application and not on every notification they receive.
-- Ben Combee, DTS technical lead, PalmSource, Inc. "Combee on Palm OS" weblog: http://palmos.combee.net/ Palm OS Dev Fourm Archives: http://news.palmos.com/read/all_forums/
-- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
