Android :: AnimationDrawable : Can't Be Started In OnResume / Why Is So?
Jan 27, 2009
There's already been some discussion of this, in various lists and blogs. I finally got an AnimationDrawable to work, but I cannot start it from onResume. I can start it from a timer that onResume starts, or an onClickHandler.
I've poked around the source a bit and I can't figure out, specifically, what state the view has to be in, in order for the background AnimationDrawable to start.
Can anyone enlighten me?
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Jul 25, 2009
I'm trying to draw a "gauge" on the screen with information from various sensors. I have a class that extends Drawable and a custom view that during construction creates a new AnimationDrawable and sets the only frame to my custom Drawable. I then start the AnimationDrawable from my Activity onWindowFocusChanged method. My custom Drawable onDraw method is only called once though. Is that by design (as in onDraw is called for each frame once and it's cached and shown over and over) or am I doing something wrong?
CODE:..................
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Feb 6, 2010
I want to do an animation with several image-files, and for this the AnimationDrawable works very well. However, I need to know when the animation starts and when it ends (i.e add a listener like the Animation.AnimationListener). After having searched for answers, I'm having a bad feeling the AnimationDrawable does not support listeners..Does anyone know how to do frame-by-frame image animation on Android?
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May 1, 2009
I'm trying to recompile AnimationDrawable class ( source code tooked from android source ) but I get some errors...
It says "The constructor DrawableContainer.DrawableContainerState (AnimationDrawable.AnimationState, AnimationDrawable) is undefined". Any ideas how to fix it?
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May 19, 2010
How do i pause frame animation using AnimationDrawable?
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Dec 9, 2009
Yesterday I post this : http://groups.google.fr/group/android-developers/browse_thread/thread...
but today this problem is not resolved and I think that the problem is an issue between TanHost component and Animationdrawable.
I tried a lot of thing, but the start() method makes nothing. The first drawable is displayed and that's all.
I would like to know if somebody can do a test to confirm it, I'll post a bug just after.
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Oct 12, 2010
I have a ListPreference with the entries and entryValues correctly set. When I go in the prefernces activity and change the value it successfully works (I added a Toast to output the value after changing the option to test). But when I do the following to compare it, it always executes the else statment when I change it everytime, even like above when I changed the ListPreference and the value was "bluesky" it still failed to execute the correct if statement. Here's the code I use to check the value of the ListPreference in the onResume():
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this)
String backgroundPref = prefs.getString("backgroundPref", "");
if(backgroundPref == "bluesky"){
mainLayout.setBackgroundResource(R.drawable.bluesky);
Toast.makeText(getBaseContext(), "Blue Sky", Toast.LENGTH_SHORT).show();
}else if(backgroundPref == "sky"){
mainLayout.setBackgroundResource(R.drawable.sky);
Toast.makeText(getBaseContext(), "Sky", Toast.LENGTH_SHORT).show();
}else{
mainLayout.setBackgroundResource(R.drawable.sunsetscene);
Toast.makeText(getBaseContext(), "Sunset Scene", Toast.LENGTH_SHORT).show();
}
The Toasts are there so I can double check which statement gets executed, and it always seems to be the else one. Am I having a bad day and getting something wrong?
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Sep 8, 2010
I've been using code like: activity.finish(); activity.startActivity(new Intent(activity, activity.getClass()));
in two places: onResume(), and in an onClick() method of an AlertDialog. I'm getting the desired results when the code is called from onClick(), but I get mysterious null pointer exceptions while the runtime is trying to execute my onPause(). Is calling finish() from within one of the Activity lifecycle callbacks always a bad idea?
This code makes me nervous even though it works in the onClick(). After I call activity.finish(), I would think activity is in a questionable state by the time activity.startActivity() is invoked. Seems like an invitation to race conditions.
My use case is setting UI preferences (e.g. a different layout) in a PreferenceActivity. When I return to the main activity's onResume(), I check for preference changes and if a new layout is requested, I use the code snippet above.
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Jan 14, 2010
Is there something like an application global onPause() and onResume()?
My main activity listens for GPS fixes, which I want to continue working when switching to another screen/activity. Therefor I cannot unregister my LocationListener in the activity's onPause(). However I still want to unregister my GPS listener when switching to another application (so save battery) and turning it back on when returning to my application, regardless what screen/activity the user is currently in. Any ideas?
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Oct 16, 2010
I have two activities. One loads all rows from a database, and the other saves to the database. When I have the second save in onStop and the first repull the data in onResume, they do it out of order (the first resumes and then the second saves). I managed to fix this by putting the saving data in onPause, but why was this happening? Was this the cleanest way to do it?
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Sep 15, 2010
I have a TabActivity with 3 tabs, each tab started an activity and I realise when a tab is clicked onResume is call. If I have onCreate, when app start it will launch onCreate and then onResume immediately.So, I can just get ride of onCreate in this case?
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Sep 18, 2009
I need to open a progress dialog on the onResume() method. But no dialog is opened. Any solutions for this?
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Feb 20, 2010
I want to know what es the best place in an Activity to bind to a service? I saw examples doing it in onResume() and also in onCreate(). I was asking myself if it is not a problem putting it into onCreate(), cause in onPause() i will do a unbind to the service, so i dont get a serviceConnectionLeak, if i leave the activity. Now if i press the Home-Button and then switching to the HomeScreen, the Activity will unbind from the service, when i go back to the Activity from the Taskmanager, then onCreate() will not be called and if the Code is trying to access a function from the service i will get a null-pointer exception. If i bind and unbind only in onResume() and onPause() i dont have this problem.
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Mar 19, 2009
I have documented cases of an activity's onResume method getting called HOURS after the G1 is - well, not asleep, since a WakeLock is in use, but "idle" with the screen off (indeed, it had been off in one case for 6+ hours).
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Mar 14, 2010
I have a small test application I am working on which has a timer that updates a textview to countdown from 100 to 0. That works fine, but now I am trying to pause the application if the user presses the back button on the phone and then restart the timer from where they left off when they reopen the app.
From the Log.v() prints I see that the _timer_time_remaining variable has the correct number of seconds stored when onPause is called, but it is set back to 0 when onResume starts. Why does the variable get reset? I thought that the application would continue to run in the background with the same values. Am I missing something? This is all declared in a class that extends Activity.
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May 8, 2010
I want to save text from 2 edittexts(et1,et2) and selection from 3 spinners(spinnerm,spinner and spinner2) onPause and setting them back onResume.
Text from edittexts is saved correctly, only spinner selection don't work as desired.
My code:....................
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May 30, 2010
I'm having a hard time figuring out the best way to pass simple values from onPause and onResume in the Android activity lifecycle. I understand how to use get and put extra bundles for activity to activity data, but does that work for passing data between the same activity? Should i used SharedPreferences?
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Apr 6, 2010
I created a TextView and put an url to it, using setText(Html.fromHtml("");. Its opening the web page in the built-in browser and when I press back, its coming back to the application.
I don't want to come back to the application, so in activity's onResume(), I call finish(). Its exiting at the first time. But when I open the application again, its throwing some exception.
Any other way to close the application, other than this way.
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Aug 21, 2010
In the included LVL sample app, the license check is triggered during onCreate. This means that when I click "Buy App" to launch the market, then immediately hit the back button to return to the app, the dialog is gone and another check isn't performed, leaving me with a perfectly usable app (at least until the activity is killed and the process starts over again).Would triggering the license check during onResume() be bad form, even though it would fix this issue? Is there a better solution?
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Sep 28, 2010
I'd like to create an app for iOS that does VOIP, presumably by interacting with a website. I can start with Android too.Does anyone know of any tutorials, suggestions or libraries that would be of any use.(The app would need to be rewritten for BB and android eventually, too.)
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Jun 22, 2013
I want to start programming android apps , but dunno how.
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Dec 7, 2009
Rumors have started flying all over the net that the droid update has started being sent out.
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Oct 13, 2009
My application is background application.It uses WIFI lock and INTERNET permission. It is doing some socket communication with a Remote Host PC and as well as with a local android application. It will start based on incoming SMS. While my application is running, I tried to use the browser application. Within a minute my application is getting crashed.(in DDMS log, I found the application process has died) And again I restarted my application, it is always getting crashed within a minute. I could not find the reason from the DDMS log. Someone can help me to figure out the problem.
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Jan 19, 2009
I want a countdowntimer to halt on a menu and also when the user goes from that menu to another activity. When the user comes back from that activity or when the menu is closed, the timer should still halt. However when the user went to the home screen and clicks on the icon again, I want the timer to restart. So my question is, is there a way to detect if the user has just opened your application, or if the user comes back from another activity or menu?
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Mar 31, 2010
I just want to get numbers of times to be used for each Activity.
So the very straightforward method I thought is increasing the count for an Activity when it was started. But how can I get the information?
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Jun 14, 2009
How can I know who started(bind) service?
I already check 'RunningServiceInfo()' but I couldn't find.
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Jun 18, 2009
Is there a way to do this?
Can you access the activity stack in a way to grab what activity came before the one now in view?
I have a situation where an activity needs to know where it was started from, so it knows what data to display in that current activity.
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Aug 16, 2010
I want to get started with mobile development , I know HTML,CSS,JavaScript,PHP and C#.
What is the best way to get started?
I know that for example, if i want to create an iphone application i need to know objective c (and get mac),Which language is the best for mobile development (and cross platform - works on Nokia,IPhone,android,palm,Blackberry).
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Aug 29, 2010
I'm looking for something to get up and running quickly with Android development. Perhaps a great tutorial covering the basics. I see a lot of posts on getting started but the ones I have looked over so far aren't great. What do people here recommend?
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Aug 14, 2010
I would like my app to do something when another application is opened.
The current approach I have taken is to create a broadcast receiver that monitors all
android.intent.action.MAIN
events, but either I am not doing it correctly or the way I am going about it is incorrect. The section of the manifest looks like this code...
I included the launcher category just as a test. GetApp currently is only set to make a log entry when called.
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