My app is a launcher. It gets killed frequently by OS when it running in background. It has to restart and reload data, which taks a long time.How to make it get less chances of being killed ?
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Finally after many days of getting StackOverflowError, I've tracked down the issue and fixed it, only to find that my game's serialization takes about 5 -10 seconds on the emulator and most likely around that in the target. So far my the lifecycle of my game is as follows
onCreate - check if serialization file exists, if it does, de- serializes it. (~ 5-10 seconds) onPause - if the game is not complete, then serialize it (~ 5-10 seconds) I remember reading somewhere that another activity's onResume will NOT get called UNTIL the previous activity's onPause has ended. So I am worried that my game is delaying another activity that wants to start from doing so i.e like a phone call etc. I think speeding up the serialization is not going to be feasible, so any ideas on what I can do? Can I serialize in the onDestroy instead of the onPause? I read that the onPause is the only safest place to store the state.
The main activity is running, then there is a interrupt. What was happended, onPause(), onStop() or other change of life cycle? 1. pressed the volume_down key and ringer volume toast occured, the life of main activity will not change? why? 2. short press the power key and the OS sleep,how about the activity ? 3. long press the power key and the phone options appear, how? 4. long press the home key and the tast list appear, how? 5. notifications curtain appear, how? 6. press the back key,how?
View 5 Replies View RelatedWhen my ListView activity loads it creates the Adapter which fills the screen as it should do. Is there an event or way to find out when the Adapter has finished getting enough data to fill the screen. I want to show a spinner the first time the Activity loads and have it go away once the screen has its first load of data from the Adapter.
View 2 Replies View RelatedWhen starting a new Activity, I want to pass a complex object and do so by using this approach:
MyActivity.COMPLEX_OBJ = myComplexObj; // which is definitely NOT NULL! Intent intent = new Intent(); intent.setClass(this, MyActivity.class); startActivity(intent);
and then in MyActivity:
@Override public void onCreate(Bundle bundle) { if (COMPLEX_OBJ == null) { // report to Flurry ... } ...
}
I am having a really hard time grokking the Activity life cycle concept. The main issue is with onStop() and onDestory() not being guaranteed to be called before the process is killed. I though I had it figured out when I saw that the system calls onSaveInstanceState() when it's shutting down the activity to claim some memory. Thing is that the docs says onSaveInstanceState() will be called before onPause() but how does the system know at this point whether the activity will be killed by the system or the user?
Here is a use case:
1) My activity starts up and is running. 2) At some point I want to show a web page so I use an Intent to start an activity. 3) The web browser covers my app/activity so I would expect onPause() to be called followed by onStop(). At this point it's my understanding that all bets are off and I can be killed at any point without be called. 4) Since the system has enough memory onSaveInstance() doesn't get called. 5) The user presses home and decides to open some app which requires a lot of memory. 6) System wants more memory and decides to kill my app but I am already stopped (onPause() has been called).
The core of this Widget is an AppWidgetProvider which registers a ContentObserver to the CallLog content URI. This means that my widget is updated every time a call (incoming, outgoing, missed) is recorded. This works fine for a while, until *something happens* and my ContentObserver stops getting called (no error message seen in trace). I would rather that this ContentObserver persisted until the user removes the Widget.
I am guessing that my JVM has been destroyed (due to low memory?), ContentObserver garbage collected and/or ContentObserver unregistered (or just pointing to nothing), but I don't know how to debug this without restarting my code (and thereby re-registering). I can hide this bug by periodically re-registering my Content provider, but I would rather understand the cause and have a more optimal solution..............
When I start my application I prompt the user for the password and use it to instantiate my data adapter object that I will need throughout the application. So I store it in Application object. My activity A prompts user for pwd, instantiates data adapter, sticks it to Application object and later starts activity B which in turn starts the built int gallery activity. When fooling around with gallery and capturing pictures for some time coming back to activity B I discover that Application.myDataAdapter is null. I found out that during me playing with camera the Application.onTerminate() method was called. So it seems like Android killed my process and when B was supposed to become visible it started a process again jumping directly to activity B bypassing A? Is that how it works? Should I then never assume that Application.myField will survive? and init it not only when A is started but whenever I discover it is null?
View 7 Replies View RelatedMy device is a Nexus One with 2.2 and I have tested two projects, one on 1.5 and one on 2.1. Problem: I have trouble to understand the life cycle of my application when the screen is turned off and on. Here is my output
// activity starts
08-04 17:24:17.643: ERROR/PlayActivity(6215): onStart executes ...
08-04 17:24:17.643: ERROR/PlayActivity(6215): onResume executes ...
// screen goes off
08-04 17:24:28.943: ERROR/PlayActivity(6215): onPause executes ...
08-04 17:24:32.113: ERROR/PlayActivity(6215): onStop executes ...
08-04 17:24:32.113: ERROR/PlayActivity(6215): onDestroy executes ...
08-04 17:24:32.983: ERROR/PlayActivity(6215): onStart executes .....................
The Xperia X10, X10 mini and X10 mini pro smartphones will all receive software upgrades during their lifecycle to improve performance and add new communication and entertainment experiences. From Q3 2010 onwards, the Xperia™ X10, X10 mini and X10 mini pro smartphones will be upgraded to run on the Android 2.1 operating system in selected markets. The Xperia™ X10's position as the best multimedia Android smartphone will be strengthened through the addition of HD video recording as part of the same Q3 upgrade. A further upgrade to the Xperia™ X10 in Q4 will make it possible to connect wirelessly to and display content on your television and enhance the Timescape™ and Mediascape applications..................
View 2 Replies View RelatedI have a service that polls for data. To indicate this to the user I have a persistent notification in the statusbar. In some cases when the device goes low on memory it destroys the service but OnDestroy is not called. Later when there is available memory OnCreate is called. Is this normal behavior? I had hoped that OnDestroy would be called to I could remove the notification in the statusbar. Now the user thinks that the service is still running, while it has been stopped by the OS.
In order to restart the polling how do I know that the OnCreate is really a restart event and not first time creation of the service? I thought about checking for the presence of the notification in the statusbar, but I couldn't find a API to check if a notification was showing or not. I have not tried "SetForeground" on the service, since the service isn't that important to the user, but maybe that would minimize the problem.
I have an Android activity which in turn starts a thread. In the thread I open a persistent TCP socket connection. When the socket connects to the server dynamic data is downloaded. The thread sends messages using Handler-class to the activity when data has been received. Now if the user happens to switch from portrait to landscape mode the activity gets an onDestroy call. At this moment I close the socket and stop the thread. When Android has switched landscape mode it calls onCreate yet again and I have to do a socket re-connect. Also, all of the data the activity received needs to be downloaded once more because the server does not have the ability to know what has been sent before, i.e. there is no "resume" feature.
Thus the problem is that there is alot of data which is resent all the time when landscape mode is changed. What are my options here? Should I create a service which handles the socket traffic towards the server thus I always got all the data which the server has sent in the service. Or should I disable landscape mode all together perhaps? Or would my best bet be to rewrite my server which is a VERY BIG job
I have a scrollable map app which for now has a huge bitmap. It loads fine on startup, but when it looses foreground status and the user brings it backs again im getting an out of memory error. In onPause it trashes the bitmap using recycle, and marks it as null. The onResume checks to see if map==null and will load the bitmap back again, which is crashing the program despite me recycling the bitmap...Here are some bits of code. All of the other references to Bitmap map first check if it is null before loading/drawing..............
View 1 Replies View RelatedAnyone have an idea on how the battery life on the droid 2 is>?
View 49 Replies View RelatedOn an average days use, how long does your battery life last?
View 8 Replies View RelatedHow long does your battery last? Mine dies out pretty quickly. Are there any apps or anything that can make it last longer? And is it just my phone(LG ALLY)? Thank you
View 6 Replies View RelatedHow long do you guys generally get before your x10 battery is ready to die?I've had mine close to a month now and has to be charged every night, also have a car charger as it might need a boost while driving.I'm doing everything to conserve battery life, just wondering if everyone is in the same boat?
View 19 Replies View RelatedMy battery usually lasts from about 7 in the morning to 4 or 5 at night with moderate texting and low usage of the internet since im in school :O JW if it should be longer or if this is normal.
View 28 Replies View RelatedI was really dissapointed with the performance of my battery in the hero, even when i turn off wifi and stop my apps from using the network it still drains so fast! so, i thought i would try turning off 3G so it uses 2G just to test and see if it makes a big difference..
It does.. Its far better now.. i dont really see a speed difference using 2G either, granted the inetrnet isnt as fast but i dont hammer the internet anyway, only to check a few sites occasionally so i'll put up with a few seconds delay if it boosts my battery performance as much as it does!
Is there a way to make a long lockscreen wallpaper on ics? This is the picture i want to make my wallpaper
View 5 Replies View RelatedI was wondering. Is there an app for changing the soft keys on my Samsung Vibrant to only activate when pressed long or double clicked? I am just sick and tired of accidentally pressing them because they are so damn sensitive, and unlike the Fascinate or Epic 4g, so close to the touch screen that pressing spacebar on the onscreen keyboard half the time results in hitting the soft keys by accident. I don't understand why we can't customize what the soft keys do and how long or many times activates them, because if you got even normal sized finger tips, it's so annoying to be typing into the search bar and then press back right below and have to retype everything again.
View 1 Replies View RelatedI have the camera open and I long touch an object and the little box turns green and it makes a noise but no picture is taken...how can i make it take the picture using a long touch
View 13 Replies View RelatedThe internal meter says it is due for charge long before its out of juice. Battery Left widget will give accurate voltage levels, but it too is fooled, even after proper calibration.
View 15 Replies View RelatedI have list activity with custom array adapter and I can't to get context menu when make long press on list item.
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
Why I do not see context menu? What I do wrong? How to get context menu with array adapter and ListActivity.
When I use the dial pad the tones are short but when I call to my voicmail then bring up dial pad the tones on the dial pad (the numbers) are long. How do I fix this and make them like the normal short dial pad?
View 1 Replies View RelatedDoes anyone know how to make icons for Launcher Pro? I've customized my dock, but now have two of Launcher Pro's native icons (cool!) and two non-LP icons (not cool!)
View 7 Replies View Relatedto make the AWD Launcher look just like Froyo, create 2 Bettercut shortcuts (yes, unfortunately you have to purchase Bettercut yah, it's ugly).Make one that points to Phone and choose this icon:Drag that into your left hotspot.Make one that points to Internet and choose this icon:Drag that into your right hotspot.now go into Settings and change the AB Scale Factor to "8".I extracted these icons myself out of a Froyo build...so they are the real deal. Enjoy!
View 7 Replies View RelatedI don't know if this is the right forum for my questions, but I'm sure this will be appropriately moved if it's not. I rooted my EVO and flashed a ROM that has Launcher Pro installed. While I was playing with the phone I chose for the default launcher to be used. I'd like to change that now and can't find a way to make LP my default launcher.
Second, I'm not 100% sure about this, but I believe that most or all of the Sense widgets cannot be used while LP is being used. If that's the case, are there alternatives to the bookmarks widget and the Friend Stream widget?
And lastly, can anyone confirm that the EVO has LED colors other than red/orange and green? Those are the only two I've seen.
i am developing a simple application which takes xml files and do the operations.i am testing it on emulator. 1.5 sdk.
View 2 Replies View RelatedI've heard good stuff about the app, Launcher Pro and thought about trying it out. After downloading it and installing I was able to double tap my home button and Launcher Pro then replaced Blur but I could never find the screen to change any of the options for Launcher Pro.I then read that Home Switcher needed to be installed and was about to download it when the first line of text for Home Switcher in the Market is that it's not supported for Froyo 2.2.Does anyone know of another program that I can use in order to get Launcher Pro to work correctly on my D2 and also be able to view the programs options/settings page?
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