Turn On (wake) screen

[qsrtech]

Hi, I've found this code online, can anyone help make it work in b4a?

It's suppose to be able to turn the screen back on if it's sleeping.

PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "tag");
wl.acquire();

Thanks!
John

 

[thedesolatesoul]

B4A already supports this: Basic4android - Phone

 

[qsrtech]

wake lock

Hi, thank you for your suggestion. I'm already using the partiallock and keepalive but they only seem to prevent the screen from going to sleep. I'd like to prevent screen burn in by allowing the screen to go to sleep and then turn it back on when there is an event. I'm pretty sure it's possible cause I have an alarm app on my phone (4.03) which seems to do this. Any other solution? I'm pretty sure I need to use the type of wake lock I described earlier.

From Android Developer:
ACQUIRE_CAUSES_WAKEUP Normal wake locks don't actually turn on the illumination. Instead, they cause the illumination to remain on once it turns on (e.g. from user activity). This flag will force the screen and/or keyboard to turn on immediately, when the WakeLock is acquired. A typical use would be for notifications which are important for the user to see immediately.

 

[thedesolatesoul]

You are correct. It can probably be done with Reflection or a small library.
My reflection skills are too rusty for this.

 

[qsrtech]

Almost there

I've managed to get this code working:

   Dim obj1,obj2,obj3 As Reflector
   obj1.Target = obj1.GetContext
   obj2.Target = obj1.RunMethod2("getSystemService", "power", "java.lang.String")

up until here, the value of "268435456"(ACQUIRE_CAUSES_WAKEUP) fails with an illegal argument exception, however if I use "1"(PARTIAL_WAKE_LOCK) it works fine

   obj3.Target = obj2.RunMethod3("newWakeLock","268435456", _
"java.lang.int","Mytag", "java.lang.String")

Any pointers?

UPDATE: changed it to "268435482" which adds "26" for a FULL_WAKE_LOCK

Now to have the "lock screen" removed after waking up the device. Again, must be possible cause my alarm app does it.

 

[stevel05]

Check the documentation on Android Developers (google for that, sorry not on my pc). Lookup Powermanager.

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[Erel]

PowerManager.ACQUIRE_CAUSES_WAKEUP flag is set when you call PhoneWakeState.KeepAlive.