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Id
7807195
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0
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0
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2
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CreationDate
2011-10-18T12:27:47.083
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0
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2011-10-18T12:27:47.083
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0
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872142
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7794084
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2
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2
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0
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text
Body
Ok, so I've found the answer, I think my question was a little convoluted to begin with, so I'll try to answer the various parts, as well as adding my actual solution.... I had an <code>Activity</code> that was starting a <code>Service</code>. The <code>Service</code> (which included an <code>AsyncTask</code>) was supposed to run in the background, monitoring the accelerometer and counting down a timer. The <code>Service</code> was then periodically sending a broadcast <code>Intent</code> to the <code>Activity</code>, when the broadcast contained certain data, the <code>Activity</code> needed to run some code. This all needed to happen with the screen off. My findings are that, yes, when hitting the screen lock, the <code>Activity</code> does run <code>onPause()</code>, but is still fully able to execute code in the internal <code>BroadcastReciever</code> class, and consequently this can call methods in the activities main process. I imagine this is a bad way to do things, but it did work. The issue was with the <code>AsyncTask</code> and the <code>Service</code>. Regardless of the the way it's set up, (<code>startForegrond()</code> etc ) a background thread will be paused for a while when the cpu shuts down (either by pressing the lock key, or waiting for the screen to time out). I found it was paused for intervals of about 1 min. The answer is to use <code>PowerManager.WakeLock</code> and set the flag to <code>PARTIAL_WAKE_LOCK</code>. This will allow the screen to shut down but keep threads running at full speed in the background. Doc here: <a href="http://developer.android.com/reference/android/os/PowerManager.html" rel="nofollow">http://developer.android.com/reference/android/os/PowerManager.html</a> dont forget to release it when done as it is expensive on the battery.
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1. POis an Activities onPause method called when the screen times out?
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1. PTAnswer
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1. USSam Clewlow
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1. POis an Activities onPause method called when the screen times out?
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