android-wake-lock

I've been studying WakefulBroadcastReceiver from this link : https://developer.android.com/reference/android/support/v4/content/WakefulBroadcastReceiver.html I have few confusions regarding this: Does this receiver ensures that you'll receive the broadcast even when the device is in sleep mode? (I think no, it just keeps the device awake after receiving the broadcast until a call to completeWakefulIntent() is made.) The documentation illustrates the use of intent service within the receiver and after the completion of work, a call to completeWakefulIntent is made. CODE : import android.app

My app periodically checks the location using an alarm to a BroastcastReceiver that starts a service. I know I should acquire a wakelock before I start the service but my question is when can I release it? If I release the wakelock after calling requestLocationUpdates , can the device go to sleep and not call my LocationListener or will the device always wake to deliver updates and stay awake until the callback has returned? I'm reluctant to hold onto the wakelock because that would prevent the device from sleeping between updates until I'm done with the location. noah So based on my

I have an activity with some Handlers that are being executed at intervals no more than 5 minutes. The activity is launched from a BroadcastReceiver and may be launched with the screen off waiting for the user to grab the phone and get the user input, when this happens, the activity onPause() is called so for sure CPU is in sleep mode. I have not set the activity to turn screen on because I want to save as much battery as possible. I've tested it with my phone and works really well, while screen is off all Handlers execute all the code they have to run. If I turn the screen on and off while

After successful root of device. Now, I need to make device always in wake state i.e. always visibility of UI and no black screen or any daydream screens. To do so I think I've to accomplish following : No lock screen - turned off Sleep set to “never” Daydream set to “off” What I found is all about application layer i.e. there are some applications which can do above tasks. But since my mobile is rooted I want to achieve with system files so that even if some other applications try to change above functionalities then they should not be able to do so. Activate developer mode go to Developer

In the book Pro Android 4 By Satya Komatineni , Dave MacLean I've found: Android acquires a partial wake lock when invoking a broadcast service and releases it when it returns from the service in the main thread Does it mean that the Android OS ensures that the device will wake up for the time of going through onReceive of BroadcastReceiver ? In my case the BroadcastReceiver should get an intent from Google Play Services (GoogleLocationServices and to be precise Geofences api ). Where is it documented? EDIT: I've also found it here : because it is guaranteed that the BroadcastReceiver