Blanking Cell Phone Screen

[GoogleCodeExporter]

This issue has been migrated from SourceForge.

Origin: https://sourceforge.net/forum/message.php?msg_id=7524555

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When: 2009-07-23 22:03:54
Who : Nobody/Anonymous (nobody)

I have a quick question about blanking my cell phone screen when the java
app is idle to conserve cell phone battery life. Is there an option in the
existing program or where would i look to add this additional feature.
Thanks

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When: 2009-07-24 01:12:24
Who : Oben Sonne (mondai)

Actually the phone should do that automatically. AFAIK this is not supposed
to be done by a Java app itself. You could check the preferences of your
phone if there are some kind of power saving policies specific to Java apps.

In theory Java apps may "minimize" themselves so that their frontend
disappears and the main phone screen is visible again (an at least then the
blanking should work). Unfortunately the "minimization" does not work on
all phones..

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When: 2009-07-24 02:44:22
Who : Nobody/Anonymous (nobody)

Thank you for the reply. I am still unable to get my phone to shut off the
display and keypad backlight during use. The phone is a Motorola KRZR so I
can suspend the app and then when i open it again it has dropped the Blue
Tooth connection and must reconnect (backlight and display blank after 1
min).  Flipping the phone closed shuts off the display/lights but also
suspends the app therefore dropping the connection. I have looked for other
settings in the phone which may fix the problem without any luck. Any other
thoughts would be greatly appreciated.
Thanks

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When: 2009-07-24 20:49:08
Who : Oben Sonne (mondai)

Ok, I'll check if there are any other possibilities with in Java apps.
Looks like the KRZR does not automatically blank because users usually do
that automatically by flipping the phone closed. Bad luck that it cut's the
connection at the same time.

I'll get back to you on this next week.

Regards,
Oben

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When: 2009-07-25 18:41:19
Who : Nobody/Anonymous (nobody)

Thank you very much.

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When: 2009-08-04 18:58:51
Who : Oben Sonne (mondai)

Read the J2ME API on this again. Dimming backlight and similar power saving
approaches are not part of it - a phone should do that automatically. You
phone does it, but a little bit too motivated (cutting the connection).
Does the phone blank the screen if you are not running the Remuco client
but keep the phone flipped open?

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When: 2009-08-08 15:54:47
Who : Nobody/Anonymous (nobody)

With the phone flipped open the screen blanks in 20 seconds (setting i
believe) then after a minute plays a screen saver by default which i have
disabled so now the phone just blanks. But when the app is running the
blanking feature appears to be bypassed and the phone stays lit up. 

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When: 2009-08-08 18:07:11
Who : Oben Sonne (mondai)

After searching for this issue on the web some users reported a similar
problem on another Motorola device. I'm afraid this is device specific, if
not a bug. I've submitted a question on this to the Motorola developer
board. I'll get back if I receive a response on this.

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When: 2009-08-13 19:35:31
Who : Nobody/Anonymous (nobody)

Don't know about Motorola, but at least on my Samsung B2700 Bluetooth
traffic seems to light up the display. The display does not switch off
completely while a Java application is running, but normally it dims after
some idle time. It stays fully lit while Remuco is running, and I suspect
this is because of constant BT traffic. If I disconnect and return to the
connection screen, the display dims after a while.

Original issue reported on code.google.com by obensonne@googlemail.com on 5 Sep 2009 at 5:08

[GoogleCodeExporter]

For now I see no way to fix this device specific behavior within Remuco.

Original comment by obensonne@googlemail.com on 5 Sep 2009 at 5:16

• Changed state: WontFix

[GoogleCodeExporter]

Actually invalid is a better status, KISS.

Original comment by obensonne@googlemail.com on 5 Sep 2009 at 8:40

• Changed state: Invalid

[GoogleCodeExporter]

Original comment by obensonne@googlemail.com on 8 Mar 2011 at 6:38

• Added labels: Component-MIDP
• Removed labels: Component-Client