Android :: Warning Before Exiting Application?
Jul 29, 2009
I have an app that receives and stores SMS messages. The main use is to run in the background, although it does have a full GUI when running in the foreground. I'm using a notification with the FLAG_ONGOING_EVENT flag so users can tell the application is running, even if it's in the background. However, the user could easily close the app by viewing the main screen and clicking the back button. The notification icon goes away, but I would like to be able to warn the user that closing the app would prevent it from capturing the SMS messages. Is there any way to prompt the user if they really want to exit the application when they hit the back button, and prevent the exit if they say no? Or should I take a different approach? And a bonus question: is there a way of receiving an SMS message, but prevent it from passing on to, say, the Messenging app?
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Jan 14, 2010
I am seeing a curious behaviour in my app. I have a widget that gets updated by a service every # hours, when the service finishes I stop it, using "stopService(new Intent(this, MyService.class));", the widget if pressed launches an Activity. Now it gets interesting, while im on the activity everyting works fine, then when I exit the app(by the back key or a button I designed which simply calls this.finish() ) the ActivityManager would tell me that my process has died, I do not see any error of any kind, just that the process has died.
Why I am seeing that message and what does it mean exactly? That is having a side effect on my service regarding static variables getting set to default. Could my code be the cause of this? Is there any way to know that your process has died? I have tested my app on a HTC Hero running 1.5, it always works well on the emulator and I never get that message. I know android kills processes to reclaim memory but Im always careful to close apps heavy on resources.
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Nov 18, 2009
I would like to know how to execute code before exiting application. My application is composed of several activities. When the user starts the application (from the launcher menu or from a notification in the status bar), he goes in an InitActivity where I process some initializations. From user experience, application always restarts. One of these initializations is to init a network manager and start a thread that periodically sends a network request to notify a server that application is active.
I need to process some end operations, like stopping this thread when user quits application, for example by pressing the HOME key or BACK key when he's in the root activity. However, when the user press the HOME key, application is still running in background.
Q1 : is it possible to execute code when exiting application (I see the onTerminate() method of the class Application but it seems not to be always called)?
Q2 : Is it possible to force application exit (activity method finish () only destroy the current activity, not the application)?
Q3 : Is it possible to handle HOME key press (onKeyDown() is not called when this button is pushed)?
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Jul 13, 2009
I have a service receiving and sending data to a server in separate threads each. The service lifecycle methods look like this:..................
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Mar 5, 2009
Say a user runs my app from the HOME screen. The app has 3 tabs. Say he/she selectes a different tab, so he/she is in a different screen (same task). Now - if the user presses BACK - the device returns to the HOME screen. If the user launches my app again - the default tab is shown. BUT - if the user presses HOME - the device returns to the HOME screen (same). If the user launches my app again - the OTHER tab is shown.
I understand (sort of) the logic - BACK returns to previous app, popping my app from the history stack, so when launched again - it is started from scratch. But this is confusing my customers - they say it's a bug ! They dont understand the different between two keys doing the same thing as far as they see (returning to HOME). Moreover - I see a different behavior with the built-in DIALER app - I change tabs, press HOME, launch the app again - and it starts with the default tab.
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Nov 4, 2010
I have a timer thread setup to play a loop using soundpool, but for some reason I cannot get _soundPool.stop(_playbackTimer); to stop the loop. even if I exit the application the loop keeps running. I have to physically power off the phone to get it to stop. am I missing something here? Does anyone have any experience with this? I have searched with no resolution. below is a snippet.
if(timeLeft>0 && timeLeft<20 && ticking == false){ _soundPool.play(_playbackTimer, 0.3f, 0.3f, 0, -1, 1); ticking=true; }
if(timeLeft==0 || timeLeft>20){ _soundPool.stop(_playbackTimer); ticking=false; }
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Feb 9, 2010
With Android Eclair 2.1 on ARM-based target, we are executing Instrumentation test application from command line:
am instrument -e class android.app.foo. -w com.android.cts.foo.MyTestApp/android.test.InstrumentationTestRunner
Test application executes fine, showing result of the sub-tests in the MyTestApp. But, Application Manager is not exiting properly. This is observed from "ps" command output:
1114 0 52328 S app_process /system/bin com.android.commands.am.Am in....
Due to this issue, we are not able to execute the test applications in shell script.
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Dec 30, 2009
Does anybody have any insight as to why a game appliction would restart when exiting with the back button. It does not automatically restart when using the Home button to exit and this only occurs one time (after the second attempt to exit with the back button, it exits cleanly). Also, I can reproduce this consistently on the Motorola Droid, but have not been able to reproduce on the G1 or the emulator running 2.0. I've tried changing the launchMode of my activities, but have not found something that works. These are my activities:
1. Splash Screen, Single Instance, Main/Launcher 2. Help, Single Instance 3. High Score, Single Top 4. Preferences, Single Top 5. Options, Single Top 6. Game, Single Top, with SurfaceView
The steps to reproduce the problem are: 1. User starts application, launching Splash Screen Activity 2. User starts game, launching Game Activity 3. Game Activity launches Options Activity (for result) 4. Game Activity restarts with result and game begins. 5. Pressing Back Button returns to Splash Screen Activity 6. Pressing Back Button again, briefly shows home screen, then relaunches Game Activity which starts Options Acitivity 7. Pressing Back Button again finally shows the home screen
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Feb 18, 2009
the thread sleeped not killed and it wakes up after 10 sec and try to post message and it causes exception. is there any way to kill the threads those are in sleep mode while exiting the application?
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Mar 22, 2009
I am a beginner for android development. I found my application always get "Not granting permission" warning when I install it by adb and AppsInstaller as following.
CODE:.............
And my application cannot inject DTMF tone and mute the micphone on call, I doubt it is related with the permission not granted issue, is correct? Could any one can tell me how to get the permission granted? I used the debug.keystore, is that related?
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Oct 13, 2009
I find that when I am running 2 android devices connected to 1 linux machine, I find I can get ADB shell to exit abnormally. If I start a shell on Device 1, then on Device 2 start a shell and type reboot. Device 2 resets like expected, but the shell on device 1 will exit. I find that functionality of running controlling multiple devices with ADB very useful for testing. My question is can anyone reproduce this? Has this been fixed upstream? Is ADB planning on first class support for multiple devices, or was this an after thought feature? Any help debugging this, or possible just a little information in the right direction so I can make a patch myself.
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Sep 4, 2009
I am experiencing a crash in my app when I quit (via the back button) out of my Activity. So far as I can tell this is happening in the Android codebase and not mine, but I'm not completely convinced of that.
AndroidRuntime E Uncaught handler: thread main exiting due to uncaught exception
AndroidRuntime E java.lang.RuntimeException: Unable to stop activity {MyApp/MyApp.MainActivity}: java.lang.NullPointerException
AndroidRuntime E at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3097)
AndroidRuntime E at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3159)
AndroidRuntime E at android.app.ActivityThread.access$2400(ActivityThread.java:112)
AndroidRuntime E at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1724)
AndroidRuntime E at android.os.Handler.dispatchMessage(Handler.java:99)
AndroidRuntime E at android.os.Looper.loop(Looper.java:123)
AndroidRuntime E at android.app.ActivityThread.main(ActivityThread.java:3948)
AndroidRuntime E at java.lang.reflect.Method.invokeNative(Native Method)
AndroidRuntime E at java.lang.reflect.Method.invoke(Method.java:521)
AndroidRuntime E at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
AndroidRuntime E at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
AndroidRuntime E at dalvik.system.NativeStart.main(Native Method)
AndroidRuntime E Caused by: java.lang.NullPointerException
AndroidRuntime E at android.app.Activity.performStop(Activity.java:3575)
AndroidRuntime E at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3092)
AndroidRuntime E ... 11 more
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Aug 18, 2010
I'm using the Android SAX parser to search for entries in a rather large (6MB) XML file. I'm basically using a derivative of the code shown in listing 8 here. The question I have is how do I stop parsing once my match has been found? The code shown continues parsing through the end of the file but I want to stop before then. Is this possible or do I need to use something other than SAX
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Jun 20, 2010
I've been researching the OS a bit and I can't really tell what happens to programs when you hit the home button to leave them. Do they stay running in the background? After a little bit of time does the system close them out? What happens to them? I have a Sprint Evo and I don't see a way to close them out. I know that battery life can always be helped, and I would hate to leave them running all day just sucking the life out of the phone if they don't have to be.
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Feb 7, 2014
I am trying to connect to a database, and I understand that it has to be outside of the main thread but i thought that this is what my code was doing...apparently not because i keep getting the error: android.os.NetworkOnMainThreadException.
package com.example.dbtesting;
import java.sql.*;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
[code]....
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May 9, 2010
I have midnight bowling installed, and when I play it works, but when I stop (press home button) I get the game sound after a while, so it is still running in the background. There is no exit button in this game, so how do I stop it then? cause it's eating my battery alive :-)
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May 13, 2010
After wasting over an hour trying to update to 2.1, I've given up on trying to get the drivers to work, but now my phone is stuck in Download Mode. Is there a way to get out of this, and turn my phone back on, so I can use it for now, before taking it to the Sprint store tomorrow to have them do the update?
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Jul 4, 2010
I've notice recently my Hero has been acting up, almost as if it is rebooting. However, I don't believe it is a full reboo, i.e. no sprint logo during boot. Only occurs when exiting out from the internet browser. As soon as you hit the home screen to exit, the phone returns to the white htc load page. It appears like it is the full reboot but it does not move next to the Sprint/Now pages. Next the desktop appears but it is grayed out (i.e. my desktop still shows but grayed out, no icons or widgets showen) and the spinning loading icon shows up. Once it finishes loading things appear back to normal. Almost makes me wonder if this reboot is more like sense rebooting and not the entire phone/system. Not sure if this is possible but I want to get anyone's thoughts and if anyone else had expirenced this.
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Jan 16, 2013
Anytime i am done using my phone it stays on unless i black it out by hitting the power button. shouldn't it do this automatically? If i get a text in the middle of the night it stays lit up killing my battery, how do i stop this?
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May 3, 2010
For example when I was using the camera and as soon as a snap a pic it goes back to the home screen, not all the time, but annoying nonetheless. It just did that when I was using google maps also.
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Jul 3, 2013
Browser keeps exiting, but I've only noticed it when I visit a certain page. Nothing comes up as in a force closing it just goes back to my phones home screen. I've tried clearing cache and that didn't work. Its really annoying, & I don't want to have to download another browser thats a last resort for me.
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Feb 22, 2010
I have a basic app with text inputs, a spinner input, and a second spinner input whose array depends on a setting changed in the Options menu. Currently, when I press Home or press Return while in my app, I either return to the desktop or cycle back through old inputs i put in recently. How can I prevent my app from opening multiple instances of itself so that there is only one instance running at any given time, and then how can I save the data entered into inputs, and the settings chosen in my option menu? I'm a bit new to Java, so I apologize if this is a simple problem.
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Jan 4, 2010
I'm getting a ServiceConnectionLeaked message that I don't understand.
There are 3 activities and a remote service, all the activities use the same remote service. The main window, activity 1, starts up, auto-starts the service and binds to it. The user then starts activity 2 to do something. The user now wants activity 3, so the code in activity 2 puts some data in an intent and starts activity 1 via startActivity (). When activity 1 is started, it reads the data in the intent and starts activity 3.
This all works as expected except that while activity 3 is starting I get the ServiceConnectionLeaked warning. This is odd because the code that unbinds from the service has never been called and the service connection continues to operate just fine. If the user backs out of the main window the service is unbound and everything shuts down correctly.
Because the UI design doesn't want activity 2 to stack on top of 3, or 3 on top of 2 I use a FLAG_ACTIVITY_CLEAR_TOP flag when starting activity 1. (I tested with this flag removed and the leak warning goes away but I wind up with extra activities/windows in the stack).
To make it even a bit weirder, if I run through the same scenario again, e.g. close activity 3 to get back to activity 1, open 2, switch to 3 there is no leakage the second and successive times, only the first time (near as I can tell).
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Nov 23, 2009
We are developing an application which uses the BufferedInputStream class several times, and we are getting an annoying message in the logcat:
I/global ( 749): Default buffer size used in BufferedInputStream constructor. It would be better to be explicit if an 8k buffer is required.
We cannot meet the suggestion all the times and it's very annoying and it doesn't make much sense. Is it possible to remove that warning message? Or to change the log level to fine instead of info or warning, for example, so that it doesn't appear in the logcat messages?
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Jan 3, 2010
Before you download an App it gives you the warning about what the App has access to. I had a new one today, and I'm not sure of the implications.
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Sep 4, 2010
Don't buy anything from Android Playground! They don't give you updates and because of that, you get stuck with old applications that taint your system and eventually makes your phone slower. Only buy apps through the market! Someone I met who works for Verizon informed me of this.
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Apr 11, 2009
Since previous releases of android SDK (I think since version 0.9), I have a warning when I run a aplication from Eclipse.
"Warning once: This application, or a library it uses, is using NSQuickDrawView, which has been deprecated. Apps should cease use of QuickDraw and move to Quartz."
How I can solve this? I am running Eclipse 3.4 (Ganymede) in Mac OS X 10.5.6.
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Aug 3, 2010
WARNING: Back up your Astrid 2 before doing the Astrid 3 upgrade!I just updated to Astrid 3.0 ("Update Available"). Silly me, I didn't read the notes other than to see that Astrid 3 was "all new". My tasks vaporized! The I tried to "restore" and it said I had to buy an add-on pack to do that. No indication of whether the restore in V3 is compatible with saved tasklists from V2. The experience left me cold. I uninstalled Astrid 3 and reverted to V2 via the link http://bit.ly/oldastrid. Then I restored from the saved list on my SD card from the scheduled backup that Astrid did last night. I still lost some tasks I entered today.
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Nov 25, 2009
A new line of apps has appeared that seem to offer quick access to all sorts of things such as Amazon, banks etc. The apps do nothing more than pass you on to the target organisation's website. The apps are chargeable. Does anybody have any further info?
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Aug 5, 2010
Has anybody ever had a warning after rooting and going online with your phone? At my homepage (google) I got a warning saying the certificate could not be validated and asked me if i would like to continue, has this happened to anybody before?
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