Android :: Two OnCreate (and OnDestroy) Invocations On Orientation Chage
Jan 4, 2010With following simple code (on clean, new android project):
CODE:..............................
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Android :: Content Provider OnCreate OnDestroy
Jun 30, 2010when writing a ContentProvider I have to implement the onCreate()-method, in which I establish my database connection. But to write the changes I made to the database I have to close the database on some point. Does something like a onDestroy()-method exist for ContentProviders or is there some intent I have to listen to, which is fired before killing my process?
View 5 Replies View RelatedAndroid :: Why Does App Not Get OnDestroy When Exited But Then Receives An OnCreate When Relaunched
Sep 11, 2009Why does app not get onDestroy when exited but then receives an onCreate when relaunched?
Here is the trace. Launched app
It received onCreate and the other expected on calls for a launch. Now, leave application with the home button and it receives onSaveInstanceState onPause onStop
And returns to the main Android screen (the one with Google Search at the top) Launch the app again and it receives onCreate onStart onResume
The docs say onCreate is Called when the activity is first created. But here it is never destroyed but created again. There are many objects that never got GCed because the app was not onDestroyed?
Is this a memory leak? What have I missed? Or should I assume that onCreate can be recalled for an already created app.
Android :: Activity Execute OnDestroy() / OnCreate() Method When Push On Keyboard
May 2, 2009I use sdk 1.5 version and same to my handphone, my handphone is use G1. Now i test my application on my handphone. When i push on keyboard, i found system will destroy current activity(execute onDestroy() method) and execute onCreate() method again. So i will all current status and all datas. I don't wish this happen, how to block system execute onDestroy() and onCreate() when i open and close keyboard?
View 2 Replies View RelatedAndroid :: Activity Being Killed - OnDestroy - On Orientation Change
Apr 5, 2010I am working on a MVC implementation for Android (to be subsequently hosted on SF and/or GC).
It works like this:
Activity (View) <=> Application (Controller) <=> Data (Model) <=> Persistence (DB/Network etc)
The scenario is:
1. Activity launch (main/launcher)
2. Notifies Application about performing a data transaction
3. Upon receipt of data response, controller devices which Activity to launch (or update existing)
4. Application has overridden the method onConfigurationChange
Problem: When the orientation is changed, the Application is notified about onConfigurationChange but:
a) The "current" activity is Destroyed and recreated -- which is fine to some extent b) The new instance which is created is automatically => onCreate, onPause, onStop, onDestroy.... now that's catastrophic.
Android Fragment OnDestroy Called Twice During Orientation Change?
Jan 19, 2014why onDestroy is being logged twice for the fragment class in the the following code when the orientation of the device changes. Its logged once for the activity class, but twice for the fragment.
Code:
public class ExampleActivity extends Activity {
protected String LOG_TAG = ExampleActivity.class.getSimpleName();
private FrameLayout mFragmentHolder;[code].....
Android :: Android Weird OnCreate / OnDestroy Balance
Sep 25, 2010is there a way to tell Android that I would like subsequent calls to startActivity() all resume the target activity rather than creating it over and over again? Any workarounds?
View 1 Replies View RelatedAndroid :: Unbind Remote Service In OnDestroy Of Activity On Screen Orientation Change
Nov 24, 2010In onCreate method of Activity, it binds to a remote service and makes use of AIDL intefaces. Is it required to unbind from the remote service when onDestroy is called on screen orientation change.?
If the activity un-bounded from the remote service in onDestroy and if no other contexts are bound to remote service, is remote service likely to get stopped losing the state that it maintains.?
Android :: OnCreate And Orientation Change
Apr 28, 2010I have an activity that checks stuffs online when it's created (is the GPS on and if not it asks if the user wants to turn it on).
The problem I'm having is that it is also doing it everytime I change the orientation of the screen.
I've read some comments on onConfigurationChanged() but is there a better way to be sure I'm checking the GPS only when the activity is first created?
Android :: Extra Call To OnCreate On Orientation Change
Jun 20, 2010I've been experimenting with orientation change and have seen a strange behavior (at least to my opinion) when I change the orientation from landscape to portrait. To make the explanation more concrete let's consider the following super-simple code:
CODE:...................
I put breakpoints at lines 9 and 15 and start the emulator in debug mode. The application starts and hits the breakpoint at line 9; so far so good. Then I press Ctrl+F11 to change the orientation from portrait to landscape. The debugger stops first at line 15 and then line 9. Everyhting normal so far. I hit once again Ctrl+F11 to change the orientation from landscape to portrait and some mumbo-jumbo starts happening. Here is the sequence of function calls I observe: 1.onDestroy() 2.onCreate() 3.onDestroy() 4.onCreate()
I really fail to understand why the platform needs to make the calls "2.onCreate()" and "3.onDestroy()". Can anyone explain why this is happening? At least I don't find it convenient because I need to implement more logic, because the extra calls "2.onCreate()" and "3.onDestroy()" cause side effects in my case. However, it would be interesting to know why these extra calls are taking place.
Android :: Why Are OnCreate() OnStart() Etc Called When Handset Orientation Is Changed
Dec 14, 2009I got my hands on Android which is really fun. But at some point I don't seem to understand the concept. I've got a Main class which reads like this:
CODE:....
In the onCreate(...) I set the layout to setContentView(R.layout.main); and add an OnTouchEvent Listener to the sole View in main.xml: myView.setOnTouchListener(new OnTouchListener() {@Override public boolean onTouch(View v, MotionEvent event){...
As you can see I also implemented a SensorEventListener which is used if required. All works fine so far.
But my problem is this (at this point my misunderstanding kicks in): whenever I rotate the device the onCreate(), onStart() etc. methods are called, causing my app to act as if it just started. Furthermore, I feel unable to implement an onSizeChanged(int w, int h, int oldw, int oldh) { ... } Listener.
Can anyone please explain where my error in reasoning is? I am working on a tiny app which is more or less done, except for the just mentioned bug(s). Maybe I got it all wrong but it does what it is supposed to do (i.e. sending touch positions and accelerometer data over the network via UDP).
Android :: Change Orientation Without OnCreate Call / Any Auto Adjacent Property?
Oct 29, 2010I want to change layout without calling the onCreate method. i also define android:configChanges="orientation|keyboardHidden" in my activity and it is not calling the onCreate method but the layout not adjust appropriately on landscape mode.
my current layout look like as follows.
after change orientation as landscape it look like as follows:
but on landscape i want the following result.
is there any auto adjacent property?
how can i do it?
Android :: Android Orientation Change Calls OnCreate
Jun 22, 2010I've made a search screen that has one tab for keywords, filters, and a search button, and three optional tabs for the different types of results (each containing a ListView with an ArrayAdapter). When starting the activity, the developer can optionally pass in the results as an extra Parcelable[] if the search has already been performed. In the onCreate() method I'm creating each of the three tabs for the Parcelable[] passed through.
When I call a search from the button on the filter tab, I clear the tabs and recreate them with the new results, which works perfectly. The problem is that when you rotate the device, it appears that Android's automatic orientation switching support recreates the entire activity, calling onCreate(). This means that my search results are reset to the Parcelable[] passed through when starting the activity. The only solution I've had so far is to call finish() then startActivity() to essentially restart the activity with the new results. I'm sure there must be a much simpler solution and that I've done something extremely noobish.
Android :: Orientation Change - Dialog Above Activity With Fixed Orientation
May 14, 2009I have created an activity for my game which handles all orientation changes by itself and has a fixed "portrait" layout. Actually it uses the accelerometer and is rendered using 2D canvas methods. If the level has been completed I show up a highscore dialog in which the user can enter his name. The dialog is floating above the underlying level screen which gets blurred out nicely. This generally works.
Problem is that the dialog does not get rotated if the orientation of the phone changes. So even if the keyboard is exposed the dialog is shown in portrait mode instead of landscape. I have tried to use an activity with dialog theme instead but the behavior didn't change. After several tries it seems that I have found the reason for this: Once there's an activity with fixed orientation in the activity stack then all subsequent activities keep this orientation, too. They will not react on orientation changes anymore (e.g. if the keyboard gets exposed).
After upgrading to 1.5 SDK the described behavior changed a little bit. Now at subactivities indead react on orientation changes like expected. However, the need to have an opaque background! That means that neither dialogs nor activities with dialog theme will work. Those will stick with the orientation of the underlaying activity. So my workaround is to first start a sub-activity with an opaque black background. This activity then shows my highscore dialog on top. It looks quite okay but I wonder if there's a better solution? Is it possible to show a dialog above a fixed portrait or landscape activity which automatically adapts to orientation changes?
Android :: Releasing Resources In OnDestroy
Aug 20, 2010I understand that the system may kill the activity without calling onDestroy(). Say I have a MediaPlayer that runs even when it's not visible, I would be releasing the player in onDestroy() method.Now, if the system decides to kill the activity after calling onPause() and never called onDestroy(), what does it mean for my MediaPlayer? Is it ever released? This is bigger problem for Camera since I think it requires to be released for other activities to use it.
View 1 Replies View RelatedAndroid :: Service.onDestroy() Invalid?
Sep 30, 2009I use AlarmManager to restart my service, code is:
CODE:........................
After 5 seconds, BootCompleteReceiver will startServcie(), but only see onStart() not onCreate() calls.
Is the way of destroying the service wrong? BootCompleteReceiver is written in AndroidManifest.xml
Android :: Testing Low Memory And OnDestroy
Jun 21, 2010Testing onDestroy.
Q: does using a lot of RAM in one application always lead to onDestroy being called on Activities in other applications?
To try and figure this out I created two separately installed applications. The first just logs its lifecycle transitions and the second allocates a chunk of memory each time you press a button.
What I saw was the second application eventually suffered a fatal Out Of Memory Error force close. The onDestroy method was not called on the first logging application and when I switched back to it onResume was called.
My conclusion is that using a lot of memory in a single application will lead to a fatal Out Of Memory Error without onDestroy first being called on Activities in other applications. The documentation left me expecting an onDestroy on the logging application since the foreground application was trying to allocate more memory.
Does the above sound right? What's a good way to test the onCreate/ onDestroy lifecycle methods as they relate to low memory?
Android :: OnRestart() Being Called After OnDestroy()
Jul 21, 2009Every once in a while my activity gets restarted after it's destroyed instead of being created again. I.e. I see:
CODE:..........
instead of:
CODE:............
Looking back in my log I can see this happening periodically, but no apparent pattern to it. This certainly isn't in the state diagram, and needless to say this doesn't make for a happy app.
Android :: Can Force A Specific Layout Orientation - But Have An Opposite Keyboard Orientation Android
Aug 19, 2010I understand how to force a specific orientation per activity in the android manifest. I would like to know if it is possible to allow the keyboard to change orientation even though the activity(the layout really) must remain unchanged.
View 1 Replies View RelatedAndroid :: OnStop OnDestroy Called From Back Key Or Not ?
Sep 17, 2009Each time I switch the orientation of the device, onStop() and onDestroy() are called. They are also called when I close the Avtivity (dismiss()), and when I press 'back' key. In onStop() or onDestroy() methods : how can I know how I can here ? I'd like to run some code when I close the Activity (back button), but not if I change screen orientation
View 7 Replies View RelatedAndroid :: Hide Activity On BACK Key Without OnDestroy?
Oct 28, 2009When user presses BACK key, my activity's onDestroy is called and then it is killed. Is there a way (by overridding Activity.onKeyDown??) to simply put the activity into background without killing it? I want the BACK key to act like the HOME key (which doesn't kill my app), except I want to show the activity immediately below my activity.
View 7 Replies View RelatedAndroid :: OnDestroy Not Called After Adding Texttospeech
Apr 13, 2010I added TextToSpeech to my app, following the guidelines in the following post:
http://android-developers.blogspot.com/2009/09/introduction-to-text-to-speech-in.html
and now my onDestroy is no longer called when the back button is pressed.
I filed a bug report regarding this: http://code.google.com/p/android/issues/detail?id=7674
Figured i should also ask here if someone else has seen this, and found a solution?
It seems that it is the intent that causes the problem, i.e. the following:
CODE:................
If I skip this intent, and just go ahead and create a tts-instance, it works fine.
Any clues to what is wrong with this intent?
Android :: Service Dies Without Calling OnDestroy
Dec 15, 2009A service is setup by an activity with startService(service_intent). This service is meant to run 24 hours a day. After some amount of time, 5 or 6 hours sometimes but its not predictable, the service is killed.In the database log, the destroyed message does not show up and the notification #1 is not cancelled. Android makes no attempt to restart the service. The database log will show the startup of the replacement service if I trigger it by visiting the activity. What can I do to keep this service running or at least get it restarted by android automatically?
View 6 Replies View RelatedAndroid : Listener - Back Button - And OnDestroy
Mar 13, 2010I have an application with a single Activity implemented as a singleton (in the AndroidManifest). It implements a Listener I wrote. When the application is first run the Listener works fine. When I use the "home" button to minimize it, then open it again it's still fine.
But when I press the back button then run it again from the application icon, the Listener doesn't work fully. The code runs and the Listening methods are called as usual but none of the UI elements that are listening update. It requires a restart of the phone to get the listener working again after this point.
I know the "back" button doesn't really close the application, per se. But resetting the phone sure does! Is there a way to use the onDestroy() or similar method to call a function that actually closes the application? I'm asking because restarting the phone is the only way to get the listener back so I was hoping I could do that programmatic ally.
For example, my progress bar is a member variable of my Activity, but onCreate() I do "progressBar = (ProgressBar) findViewById(R.id.progress_bar);" Is this perhaps creating a separate instance of it or something?
Android :: Order Of Statements In OnDestroy() Method
Feb 3, 2010If I override my main Activity's onDestroy() method in order to recycle a bitmap when the screen is rotated, should I call super.onDestroy() before or after myBitmap.recycle()? Does it matter?
View 1 Replies View RelatedAndroid :: OnActivityResult No Longer Being Called After OnDestroy
Jul 3, 2010OnActivityResult is giving me major headaches. My little game has a title / menu screen. Upon clicking "new game" an Activity is launched which creates a SurfaceView for my game world.
When playing, the player can enter buildings in the game world. Upon entering a building I launch the activity for that particular building from my SurfaveView.
Here is an example:
CODE:............
mMap is the SurfaceView. I'm passing a bundle containing the state of the player. In onActivityResult I grab the bundle returned by the store activity and update the player state.
CODE:................
mSavedPlayer is later used to set the new player state.
All the above works generally
I can enter stores, buy stuff, leave and the player is updated correctly.
The problem manifests when I press the Home button (or someyimes back button) and onDestroy gets called. My onDestroy method does nothing besides call super.onDestroy();
After onDestroy() gets called onActivityResult no longer gets called.
So:
1) I play the game, everthing works great.
2) I press home and ondestroy is called
3) relaunch my game via launcher icon
4) Resume game. I can still enter and leave stores but onActivityResult is no longer called.
Here is some logcat output. I'm logging each time I enter a relevant method.
CODE:................................
Android :: Using Orientation Sensor To Get 360° Orientation
Jul 17, 2009I have a problem with working with the ORIENTATION values of the SensorManager. I would like to have some kind of 360°-value which directly shows me if the phone is in normal portrait (0°), landscape, portrait turned around (180°) or anything in between. So I could have, for example, an arrow that points to the floor (like gravity would do with a plummet) all the time, no matter how I tilt (sidewards) the phone. I thought this would be easy, but I'm pretty confused at the moment.
First of all, the X value of the orientation-array seems to correspondent with how I turn the phone, BUT: if it's completely uprightly standing, this value is about 60° ... why not 0° (or 90°, 180°, 270°), as I would expect?
Second: The value resets if I turn the phone and Android automatically changes screen orientation. So both in Portrait and in Landscape mode it will be sth. like 60° when the phone is in a 0° angel in real world. I set "android:screenOrientation" to "landscape" but this doesn't help anything :/
I want the app NOT to change orientation when I turn the phone, but I want it to get a continuous orientation value when I tilt the phone.
Android :: OnStop And OnDestroy Aren`t Invoked After Calling Finish()
Oct 14, 2010i`ve got some problems with finish() method. I expect what after calling on my Activity finish() method onStop and onDestroy must be triggered(or am wrong??), in majority of examples they are, but Scenario: - reboot phone - launch activity - invoke finish() onPause is triggered but afterwards they are no calls to onStop() and onDestroy()I`ve noticed, that those calls are triggered after launching any other activity.
View 7 Replies View RelatedAndroid :: How To Save Value OnDestroy Or OnStop / Program Launches Back Again?
May 6, 2010I wonder if I could save a value (in my program its an index) so I could call it back when the program launches back again (even if the program destroyed) and the user could start from where finish.
View 2 Replies View RelatedAndroid :: Implementation Of OnDestroy For Service Containing Worker Or Backround Thread
May 26, 2009I'm implementing a service that contains a thread to handle all time consuming operation. My core service logic is in a different thread than the ui or main thread. According to the Android document, when the OS plans to free some system resource, it will call onDestroy () on the service and only when onDestroy() returns it will kill the process hosting the service, thus giving opportunity to the service to cleanup.Now, when onDestroy() is called, I want to send a message to my service thread to do the necessary cleanup. Only when the service thread acknowledges that the cleanup or shutdown is complete, onDestroy () should return. I could find a way to send asynchronous messages to threads and the corresponding processing of the messages, but not able to figure out how I need to implement onDestroy(), such that it would send a message to the service thread and should wait for a result, before returning.
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