Develop Reference

Android Device screen not turning off

I started songs on one of the music apps, on my android device.
Although I can see only partial wake_locks being acquired, still device display doesn't turn off even after screen timeout.
I wonder what is keeping the device screen on.
Can someone suggest where to look for probable cause.
Thanks!

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wakeLock = pm.newWakeLock(
pm.SCREEN_DIM_WAKE_LOCK, "My wakelook");
// This will make the screen and power stay on
// This will release the wakelook after 1000 ms
wakeLock.acquire(1000);
// Alternative you can request and / or release the wakelook via:
// wakeLock.acquire(); wakeLock.release();
I used this code and works fine to me.

How to make my avd stay awake

Problem :
I am testing android application using robotium, My Problem is screen gets off after few second if user did not interact with the app,how to keep screen always on for testing app?
What I tried :
Made Stay awake on under development options of avd
I cross verified this post but it was related to development side where i cant modify the source of apk
My Question :
how to keep screen always on for avd testing app ?

For testing you can instantiate a WakeLock.
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wakeLock = pm.newWakeLock(pm.SCREEN_DIM_WAKE_LOCK, "My wakelook");
wakeLock.acquire();
Don't forget the permisson WakeLock
<uses-permission android:name="android.permission.WAKE_LOCK" />
Alternatively you can try the "wake lock" option in the devices development settings.

Window w = ((Activity)mContext).getWindow(); // in Activity's onCreate() for instance
w.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON );

Make app/service "run after screen turns off" ? -Android-

i a'm completly android programing noob
i'am working on developing "Androrat" (this project is not mine i had found it over the internet)
when the screen turns off the connection is lost
how can i make the processes/service always running ?
I had googled some and found that i have to include a partial_wake_timer
I want the code and where i have to enter it ?
I a'm completely noob please bair with me
http://dl.dropbox.com/u/102520949/Untitled.jpg
or maybe a kind person can help me over team-viewer ?

A partial WakeLock is what you want. It will hold the CPU open, even if the screen is off.
To acquire:
PowerManager mgr = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
WakeLock wakeLock = mgr.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyWakeLock");
wakeLock.acquire();
To release:
wakeLock.release();
This answer was taken from this link:
How can I keep my Android service running when the screen is turned off?
Next time, please search more deeply.

Android Wakelocks in 4.2 for flashing the screen on and off

In versions of android before 4.2 I used to have some code to flash the screen on when a notification came into the app (if users wanted it to flash). I used:
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(
PowerManager.SCREEN_DIM_WAKE_LOCK |
PowerManager.ACQUIRE_CAUSES_WAKEUP, "example_tag"
);
wl.acquire();
//this would switch the screen on
//then after a little while I'd call
wl.release();
So the "aquire" method would switch the screen on (if it wasn't already) and the "release" would switch it straight back off.
In android 4.2 it seems that the switching off doesn't happen when you release the wakelock, but only when the screen timeout setting for the display is reached (default seems to be 2 minutes)
Is there any way to make it switch off when the wakelock is released. I've seen some bits in the API about specifically switching the screen on and off, but I'm a little unsure about using as I wouldn't want the app switching the screen off if somebody was in the middle of doing something, so the wakelock seemed to work well. Any suggestions?

The only way I've found it to set the screen timeout down to a short time but store off the default and restore it when finished. This will turn it down to around 5-7 seconds at the shortest and you have to be careful to restore the setting back correctly afterwards as it's a total hack really.

Unable to Keep Screen from Sleeping in Android 4.2

I have a simple battery test app I wrote for Android and have used for several versions now successfully. It works fine in Android 4.1 The app simply launches the chrome browser to a different web site, logs the time to a database, waits 60 seconds and does it all over again.
Now, in Android 4.2, the screen turns off and system goes to sleep despite the fact that I have a wakelock and have set screen timeout to never using settings. What's most annoying is it turns off at an indeterminate time, not a fixed time after starting the test. Any idea what I need to do?
Here's the wakelock code I call in the service that launches the browser over and over again.
super.onCreate();
// Wakelock
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "My Tag");
wl.acquire();
I also put this in the layout file
android:keepScreenOn="true"
However, the app's screen itself isn't visible throughout the test as Chrome is always the foreground window and the browser launcher is a service and the wakelock is in the service.
Any idea how to keep the screen from timing out? Nothing seems to work.

Just add following line to your XML file......
android:keepScreenOn="true"
:)

I would guess that Android is killing your service and causing your wakelock to be released. Try making your service run in the foreground (with startForeground()) and see if that helps.