Android :: WakeLock
Sep 1, 2010
I have a problem with acquiring a WakeLock. It seems not to work. I am trying to acquire a FULL_WAKE_LOCK but neither the display gets enabled nor is my app able to perform tasks.
I am using the following permission: android.permission.WAKE_LOCK
My acquire code looks like this:
CODE:...........
What am i doing wrong?
Added another flag ACQUIRE_CAUSES_WAKEUP ... but no changes in behavior
All i am trying to do is, to play music and to wake my device up upon a certain event. The music is working perfectrly but the device stays black.
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Jul 7, 2010
I have a service that acts a download manager, downloading files in the background. I have aquired a partial wake lock while the downloads are going. When the downloads finish, I manually release the wakelock. Because I am paranoid, I acquired the wakelock also with a timeout. The problem I am seeing is that if I have already manually released my wakelock, when the timeout period expires an error is presented to the user (and adb logcat shows an under-locked wakelock exception).
Is there any way to use a timeout (as backup wakelock release in case the app force closes for some reason) without getting this error?
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May 24, 2009
The new IntentService in Android 1.5 looks excellent for handling AlarmManager-initiated broadcasts for scheduled WAKEUP work...except I can't see that it uses a WakeLock anywhere, either in itself or Looper/MessageQueue.
Does this implicitly hold a WakeLock that I'm not seeing? Or would I need to create a WakingIntentService that has an active WakeLock so long as there are messages in the queue?
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Jan 11, 2010
My WakeLock isn't keeping my device awake.
In OnCreate() I've got:
CODE:...............
Then:
CODE:........
The screen turns off before the timer finishes, how can I make the screen stay visible?
mWakeLock is a field previously declared like so: private PowerManager.WakeLock mWakeLock;
My device uses Android 1.6. I would really appreciate any help to resolve this.
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Jun 7, 2010
I'm just wondering if I do this correctly; I'm programming a notification app which can display a notification when the phone is sleeping
Disable keyguard lock. Aquire a wake lock. show notification. Set alarm for timeout and reenabling keyguard and release wakelock is the user dont touches the screen. 4.1 User touches the screen, and I disable the timer. Do nothing more. Done and done 4.2 User dont touch the screen, so reenable keyguard and release wakelock. Phone sleeps again
Basically I'm wondering about point 4.1 the most. cancel the pendingintent for the alarm, and do nothing more? or should the keyguard and wakelock that are set be dealt with in some way?
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Jun 14, 2009
I am trying to use a service to control a wakelock so I can permanently leave the screen on when my application is running. I create the wakelock and activate it in onCreate() and release it in onDestroy() however I get the error "wl cannot be resolved".
Can someone explain how I can get over this? Code below:
CODE:..................
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Sep 11, 2010
I have a signal that puts my app to sleep for a given number of minutes (using AlarmManager) and then wakes it back up.Everything is working except the screen doesn't ever come on.I then release the wakelock when I'm sure that my app is up and running and connected again. However, the screen never comes on! The app only actually comes back to life when I hit the power button to wake up the screen manually.I'm developing on an HTC Hero.
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Mar 26, 2010
I have a terrible bug in my widget. The widget is waken up using an AlarmManager (the update interval is chosen by users, ranging from 30 mins to 2 hours) to grab some data from the Internet and display it on the widget. I do not hold a wakelock since if the phone sleeps, just let it sleeps. There's no way to update the information since nobody will see it. If I put the phone in the basement (has no wi-fi or cell signal) for about an hour. the phone will definitely not update anything. However, when I get it back from the basement, the cell network could never be recovered again no matter how long I have waited (it just get an X on the cell signal icon on the notification bar) that I must restart the phone. May I know if a partial wake lock must be held on checking network availability?
Find the code skeleton as below:
CODE:.................
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Apr 13, 2010
I have a service which, when started, does some stuff (like downloading files) typically taking about 2-3 minutes.
If I start this service and then immediately use the power button to switch off the screen, then I would expect the phone, at some point, to fall asleep. But it never seems to fall asleep while the service is still doing its stuff. At least, not on my Nexus One.
I'm not using a wake lock (though I do use WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON in the activity that monitors the service progress).
So is it true that I don't need to use a wake lock?
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Oct 20, 2009
I have the following code in Oncreate of my activity:
CODE:.......................
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Oct 18, 2010
I have a service that needs to write some data to the internal storage using RandomAccessFile. Do I need to use a WakeLock to make sure the data won't get corrupted if the service process gets killed?
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Feb 4, 2010
I'm trying to implement a times WakeLock in my Application, so this is not a Service.
I want the wakelock to simply prevent screen dimming for 3 min. Looking through the docs, this seems simple enough, but I seem to randomly encounter a Under-Locked exception that I cannot pinpoint.
Here is my WakeLock-related code:
in onCreate: PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); mWakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, TAG); // Adjust time to include user's setting int timeout = WAKELOCK_TIME - Settings.System.getInt(getContentResolver(), SCREEN_OFF_TIMEOUT, 0); if (timeout > 0) {mWakeLock.acquire(timeout);} ...
in onDestroy: if (mWakeLock != null && mWakeLock.isHeld() == true) { try { As you can see, I wrap the release and try to only execute it when necessary as a clean up only. I'm assuming that since I'm aquiring with a timeout, the PowerManager will handle the release in most cases when the timeout expires.
I don't have a copy of the logcat at the moment, but what seems to happen is I get the Under-Locked exception randomly, and at random times (it's not always when WAKELOCK_TIME elapses). The strange thing is that the exception does not point to my code - all the entries point to "internal" Android code.
It's hard to find examples of other people using aquire with timeouts. Any ideas what I could be doing wrong here?
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Jun 16, 2010
I have a timer that schedule a task to run every 5 minutes. This task send a request to a server, so I need to be sure that CPU is on so that wifi or 3g can be used.
So the first thing I do in my run() method is :
CODE:.........
And the last thing I do in the run() is : wl.release() ;
I would like not to release here to be sure my service will run in the next 5 minutes :
The question is : if the device is already in a sleep state, can I wake up it with my wl.acquire() ?
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Oct 6, 2010
Is it possible for a program to effectively and efficiently use partial wakelock without burning through a lot of battery? Tango, for example? I'm trying to decide if the partial wakelock usage is worth the video call ability.
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Sep 10, 2010
I'm developing an sms receiver, and i have included a KeyguardManager and a PowerManager to be able to disable the keyguard and turn on the screen if user would like to. This works great, but only once.
When a message is received, the keyguard gets unlocked and the screen is turned on, and it gives out a sound and vibration. But if i don't read the message right away, but let the device power off by screen time out, and i then receive another message while the last one is not read, the device does not turn the screen on again, and it does not give out a sound or vibration, until i turn on the screen manually, then the sound and vibration comes.
If i close all received messages, then my app is able to disable the keyguard and turn on the screen and give out a sound and vibration when a new message is received.Here is my code that is run when the keyguard should be unlocked and the screen should be turned on.
Code:
private void disableKeyGuard()
{
KeyguardManager km = (KeyguardManager)getSystemService(KEYGUARD_SERVICE);
kl = km.newKeyguardLock("SMSHandler");[code].....
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Dec 6, 2013
I have a N7 2013 on stock KRT16S, and my biggest wake lock is AudioMix.
I'm rooted, using Greenify, and I even have Google Search uninstalled. I am not using GEL. People suggested turning touch sounds off, and I tried that too, but it didn't work.
what is this AudioMix wakelock? Is this like Audio_Out2 on the Nexus 4? Keyboard sounds or any sounds = wakelock? I also find it odd that considering I use my phone on vibrate 98% of the time, that the on my Nexus 4 and older phones, the speaker turns on when I press any button my phone. I thought system sounds wouldn't turn on? Quite interesting. Even in silent mode, the speaker turns on. I know this because my Nexus 4 speaker used to crack everytime it would turn on. To me that's an unnecessary wakelock that should ONLY happen if you're not in silent or vibrate."
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Dec 4, 2013
I want to generate a wakelock when my screen goes off and then release that wakelock 20 minutes later. I can't find an app that will do this for me. Is it possible with Tasker and if so, how??
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May 6, 2014
Google+ is killing my battery with this partial wakelock. Short of freezing it with Titanium (which does solve the problem for me), how to prevent this from running? It literally runs as long as my phone is on, and is just draining my battery.
On HTC Sensation, S-Off, rooted, using stock ROM (4.0.3)
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Mar 20, 2013
I'm getting beat down with GTALK_ASYNC_CONN wakelocks while on my work's AP.... the specific WL is :gtalk_async_conn com.google.android.gsf.gtalkservice.androidendpoint.... something everyone has been complaining about recently, and I never saw it until recently (now that I got up to 4.1.2 a short time ago.
Is there a way to determine exactly who is generating that WL? It's not related to GTALK, as the WL name incorrectly leads us to believe, but it must be google, and I only see it fire when the Wi-Fi is connected and in use. It's non-existent when I'm on Mobile. It comes and goes, sometimes chugging wake time like its cheap beer, othertimes it's dormant, and I haven't been able to figure out who is using it based on the context of when it occurs.
There HAS to be a log or something somewhere that says process X is responsible.
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Jan 13, 2010
I'm using Wakelock in my application to prevent the phone from sleeping when the app is visible. The problem comes when there is an orientation change and the system destroys and re-creates the app in landscape mode. If the wakelock timer has expired in the background the system takes the release of wakelock as an opportunity to switch off the screen.
Edit: I should mention that I am setting Wakelock onResume, and releasing onPause - as I understand it, it's necessary to release then to prevent the app from leaking the wakelock. I need wakelock to continue through the orientation change. Below I've outlined a solution to this. Is this the preferred way to handle it, and are there any alternatives?
Create a service which holds wakelock (rather than the activity) and when the activity unbinds the service starts a countdown timer (for say 10 seconds) in which it will release wakelock when the timer expires if the activity does not rebind. If it was a simple orientation change the activity will rebind within that 10 seconds and so maintain wakelock, if it doesn't, wakelock will be released.
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Oct 19, 2010
today i meet the problem.i need technic can control the android machine from server.then i want send data from server to android with no request from android.
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Apr 14, 2010
I'm trying to open a dialog window, but every time I try to open it it throws this exception:
CODE:.................
I'm creating it by calling showDialog with the display's id. The onCreateDialog handler logs fine and I can step through it without an issue, but I've attached it since it seems like I'm missing something:
CODE:............
Is there something missing from this? Some questions have talked about having this problem when creating a dialog from onCreate, which happen because the activity isn't created yet, but this is coming from a call from a menu object, and the appContext variable seems like it is correctly populated in the debugger.
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Jun 3, 2010
I'm writing an application which connects to a back office site. The backoffice site contains a whole slew of JavaScript functions, at least 100 times the average site. Unfortunately it does not load them, and causes much of the functionality to not work properly. So I am running a test. I put a page out on my server which loads the FireBugLite javascript text. Its a lot of javascript and perfect to test and see if the Android WebView will load it. The WebView loads nothing, but the browser loads the Firebug Icon. What on earth would make the difference, why can it run in the browser and not in my WebView? Any suggestions.
More background information, in order to get the stinking backoffice application available on a Droid (or any other platform except windows) I needed to trick the bakcoffice application to believe what's accessing the website is Internet Explorer. I do this by modifying the WebView User Agent.Also for this application I've slimmed my landing page, so I could give you the source to offer me aid. package ksc.myKMB;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebSettings;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class myKMB extends Activity {
I already have JavaScript on the web browser on, the problem is the web view is acting to different from the web browser.
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Aug 15, 2010
I want to implement my own Tokenizer base on the file
"MultiAutoCompleteTextView.java",
but I encounter an error "com.android.internal.R cannot be resolved" when I try to
import "MultiAutoCompleteTextView.java" to my project.
code:.................
I haven't research any solutions to resolve this problem.How to correct "com.android.internal.R.attr.autoCompleteTextViewStyle" my own attr?
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Jan 11, 2010
1- Does Android Browser (Éclair code base) support the "plug-in" or not?
2- Why "Google Gears" support is removed from the clair code base?
I searched the forum and came to know that earlier version of the Android does not support it at all? Here is the link for that, but this query asked in Dec'2008.
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Jan 5, 2010
At first,I have a database created by using Ruby on rails.I just already implement insert function(HTTPPost) in my Android Application and it's work.But I don't know how to retrieve specific record from my databases and insert it back to specific record in Android (Like edit function in RoR)This is my insert code :
private void insertComment() {DefaultHttpClient client = new DefaultHttpClient();HttpPost post = new HttpPost("http://10.10.3.87:3000/comments");
// Configure the form parameters
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
nvps.add(new BasicNameValuePair("comment[content]", t_comment.getText().toString();
nvps.add(new BasicNameValuePair("comment[id_account]", "1"));
nvps.add(new BasicNameValuePair("comment[id_place]", Integer.toString(position)I really try many ways out but it doesn't work and it takes very long time to fight with this piece of code. Actually, I really don't know how to specify RowID to HTTPPost.
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Sep 17, 2010
I am doing some android development, and now I need to send some android application generated data onto a remote server (a database)?How can I do that? can I use direct JDBC connection and sql?
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Oct 9, 2010
So i am making a android app, and i want it to be so if i call lets say 911 it sends my GPS coordinents to a certain IP, i know everything but how i make it so if i call 911 it sends the info and how i can make it send the info to the IP via 3g,
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Jul 10, 2010
I released updates of my apps yesterday and they are being hidden from android 1.5 and 1.6 phones.
This is due to a Market bug which hides apps with bluetooth permissions from android 1.5 and 1.6.
Come on Google fix the market. We spend countless hours making are apps work on ALL android versions and now you do this...
This issue has been raised since June, but has only affected me since i made an update to the market yesterday.
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Dec 23, 2009
What exactly are mock tests... I need to know the mock and performance tests available in android for testing android apps..what is the best tool for testing android apps and how..
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