Android :: Wait For All Tasks In An ThreadPoolExecutor To Finish Without Shutting Down The Executor?
Oct 14, 2010
I can't use shutdown() and awaitTermination() because it is possible new tasks will be added to the ThreadPoolExecutor while it is waiting.
So I'm looking for a way to wait until the ThreadPoolExecutor has emptied it's queue and finished all of it's tasks without stopping new tasks from being added before that point.
If it makes any difference, this is for Android.
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Sep 7, 2010
I have one activity call a camera view activity, and in the onActivityResult, I have it start that activity again with different parameters. Android doesn't seem to like that, and gives me an error that the camera is not available if I start it right after it returns. I tried just waiting a few seconds, but this doesn't seem to work on all phones, and it sometimes crashes. Is there some way to wait until that activity finishes properly, and gives up all resources?
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Sep 20, 2010
I am having a problem where my XML files are slow to load and don't finish downloading before they start to be parsed which throws an xml not well formatted exception from my parser showing that the file downloaded incompletely. The complete error from logcat is "ERROR/Error(323): errororg.apache.harmony.xml.ExpatParser$ParseException: At line 10, column 46: not well-formed (invalid token)" I know the xml file is correct because sometimes it will work and I can also pull it up in my browser and look at it.
What would be the best way to make the parser wait for the InputSource before continuing on and parsing the xml data? The code below is the code I use to get the file and parse it.
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
GradeHandler gradeHandler = new GradeHandler();
xr.setContentHandler(gradeHandler);
URL url = new URL("https://url/to/xml/file");
HttpsURLConnection ucon = (HttpsURLConnection)url.openConnection();
ucon.setHostnameVerifier(new AllowAllHostnameVerifier());
xr.parse(new InputSource(new BufferedInputStream(ucon.getInputStream())));
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Nov 10, 2010
I have an app that contains multiple tasks (stacks of activities). I can jump from one to another with no problem, but when i finish a task it goes to the previous stack. I would like to finish all stacks whenever i finish one of them, because I want my application to finish. Does anyone have an idea on how to achieve this?
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Sep 9, 2010
I must say I'm realy fed-up with with Sony Ericson for not providing 2.2. I've just bought the X10 thinking it was the best. can't wait for my present contact to finish, so I can chose a proper smart phone. Can anyone advise me on my next PROPER smart phone.
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Feb 12, 2010
When using ThreadPoolExecutor can I use AsyncTask as the Runnable in my queue? Or does this defeat the purpose?
CODE:.....................
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Oct 14, 2010
Is it a good solution or not? How to implement? How to use Executor instead of AsyncTask or IntentService for queueing task on Android? When should I shutdown properly? I shutdown it onDestroy() in the Activity, then relaunch my app as soon as possible. It causes a java.util.concurrent.RejectedExecutionException, Why? Does anyone know its lifecycle?
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Aug 14, 2010
With this sample code, the activity is told to finish, but continues execution afterwards and displays the message. I'm trying to understand why this happens. The only fix I can think of is to place 'return' after finish.
public void someMethod() {
if( valueIsTrue) {
startActivity(new Intent(this, NewActivity.class));
CurrentActitivy.this.finish();
// return; // if uncommented, Toast doesn't show
}
Toast.maketext(this, "Some message", Toast.LENGTH_SHORT).show();}
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Apr 6, 2010
Using my Android application, when a user does a certain action, a background service is started that fetches the current GPS location and saves it in a database in addition of doing some other stuff. In that service, I use the requestLocationUpdates() from the LocationManager class and wait until the onLocationChanged() of my LocationListener (which is implemented by the service) is fired. But what is the best way to wait for the onLocationChanged to fire? Should I simply poll on a variable and wait until it is set? Any tips?
I cannot simply write to the database in the onLocationChanged() because of some other stuff.To clearfy my situation, I can present an example similar to my case:Let's say user pushes a button and a method myMethod is fired which will return some object. Then, in this myMethod I will register for location updates from the GPS (using requestLocationChanged) and in addition wait for the users location and use it for something. In other words, myMethod cannot return before the location is present. I don't know how I can use onLocationChanged in this case.
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Aug 12, 2010
I had a Toshiba laptop which after years I sold it off. I am never a big fan of laptops in the first place as my desktop is better, faster and I use multiple screens as work computer. As far as I can tell I only need a portable computing device mainly for office programs like microsoft word and powerpoint, and data storage. I use photoshop but I don't think current smartphones can support it yet. I am reluctant to get a laptop as I know that it will be underutilised. Since my contract phone runs out in June 2011, should I wait for better stuff to come or get a smartphone now? What I really want is a a mobile phone with Sony Vaio P series minature laptop for occasional work. Am I asking too much for the current crop of smartphones?
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Sep 13, 2010
I, i have a service and i want that once it started, it performs is work every 30 seconds. How can i do that?
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Nov 19, 2009
I have two apps that take advantage of GPS. The recommendation of the SDK is for setting up the location listener is to set time at 60000ms or 1 minute. My tests show if you use that number when exiting the app it may not shutdown GPS. Even using the call to stop location updates when onStop is called doesn't necessary help. In fact one test app doesn't have that call and may shut down anyway on exit. When the number is reduced (as in some examples I found online) to 100 ms then it usually always shuts down. IOW, the satellite icon disappears as it should. I've read some posts here and elsewhere but this issue seems to still be open.
Correct me if I'm wrong but I would think the 1 minute update might be appropriate for a program that will stay open for awhile. My users may only look at the program temporarily and not need updates over a long time. So I'm thinking of leaving the value at 100 ms which seems to work.
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Apr 23, 2010
When loading a page with WebView, images seem to appear one at a time as they are downloaded or loaded from the cache. This gives the user more of a "browser" type of experience instead of an "app" type of experience. Is there a way to make WebView wait until all images are ready on a page before displaying the entire page?
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Nov 2, 2010
I am making an application that has Activity which communicates with a single service, and is used to start, stop or change settings of that service. I used a singleton approach from this tip.
My problem is that busy-waiting is not working for me and I can't attach a listener to the service because activity gets blocked. I want the service to start or get it's current instance at application start so I put the busy-waiting in onCreate. I'm guessing I'm doing this very wrong, so how do I do this appropriately?
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Dec 1, 2009
I just purchased my Driod on Wednesday. I took it back today because it kept on freezing. They gave me a new one, but for the last 6 hours it has been "loading data, Please wait...". The Verizon store had no clue what was going on. It is in the task bar.
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Aug 28, 2010
I am a Verizon Wireless customer, and it is time for an upgrade this coming weekend. I am really considering the HTC Incredible over the X (too big for me) and D2. Would if be worth it to wait a month or two for any future Android phones?
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Apr 19, 2010
I have a problem handling messages in a Thread. My run-method looks like this The problem is that the run-method logs "id from message: null" though "message ID" has a value in the Log-statement. Why does the message "lose" it's data when being send to the thread? Has it something to do with the notify?
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Jul 2, 2009
Is there any way for an activity to register for being notified if a wait/force close dialog is shown or alternatively if the user selects force close, a way to detect that in ondestroy()?
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Aug 18, 2010
In the Activity title bar, how do I put a spinning wait in the upper right corner?
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May 18, 2010
I have an android app where I am doing the following: Code...
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Oct 25, 2010
Basically I have created a blackjack game (first using just java) and it falls under an infinite while loop (this is so that the deck data is kept and everything works well. So first it deals the cards and then it needs to wait for either the hit button (which is displayed) or the stand button (which is displayed) to be clicked. I initially did this with a while loop that would keep checking if buttons were hit (basically when a button was hit, a static int would change and stuff would occur). However this just causes the droid to freeze up (thus far anyway) and also not refresh. So please someone tell me there is some way I can have my method pause until a button is pressed? I also need to know the proper way to use invalidate() so that my textviews, pictureviews and such can be updated as the methods change them.
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Sep 1, 2010
When a try to deploy my android App in the emulator, after the application(.apk) gets loaded in to the emulator, when I tap on the menu button in emulator for loading my application's initial screen, its is raising me a alert message with this information:
<pre>Sorry Application Keyboard in Process (Force Quit / Wait)..</pre>
and some other similar messages too..
How can I avoid this issue that is happening at all time, When this happens, unless I tap on Wait button, I can't able to proceed.
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Oct 7, 2010
I just received a warranty exchange Samsung Vibrant, & I am currently in the process of putting all my apps onto it. I have the widget on my home screen. The widget seems to be working, but the "loading data please wait" message is still displayed in my notification drawer & the little circle of dots is still in the task bar up top.
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Dec 17, 2009
I'm coming from .NET world, and unfortunately looking Java source with .NET's eyes. Following code is from Android Apps (though not Android specific at all):
private class Worker implements Runnable {
private final Object mLock = new Object();
private Looper mLooper;
Worker(String name) {
Thread t = new Thread(null, this, name);
t.start();
synchronized (mLock) {
while (mLooper == null) {....................
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Nov 25, 2009
I have a message -- saying Loading Data, please wait -- but it's been a long time. What does this mean? How can I make it stop?
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Sep 10, 2010
my version of swype my Droid Eris was working fine the other. All I did was shut my phone off and turn it back on and now it seems like it doesn't track my finger frequently enough to do double letters anymore... anyone else have this problem? How do I go about fixing it?
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Jun 30, 2010
Is it possible if my application is running and that time if any incoming call arrives then i want to kill or wait that call (phone activity). any one achieve this type of work in android. i have a no idea how to do this.
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Nov 24, 2010
the only way that the battery charges is with the phone off. Last nite left it on the charger, powered on and this AM the battery is 30%. Anyone else having this problem? Seems to me that it then makes the car charger useless as well.
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Aug 16, 2010
We all know that hitting the back button on the device doesn't kill the application, it merely finishes (destroys) the activity running on the foreground.
Well I have come across some code which helps me capture the back button signal so that I cannot exit the application. The only way to exit it in such cases is to press the home key.
Now this situation presents me with a unique disadvantage! The inability to kill finish the application on a time of my own choosing allows the application to keep running in the background like nothing has changed.
So in such cases is the task manager my only friend or is there a way for me to otherwise kill this application?
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Nov 30, 2009
I see no means by which my activity can pop itself off the activity stack to return the user to the one he was using before it was invoked. Is there one? My purpose is that my app has some data structures built from data provider queries that take 5-15 seconds to assemble and I don't want a lot of latency if it is used in a few one-shot purposes in rapid succession. I'm more than willing to let the system ask my app to die, but I'd like to keep warmed and ready otherwise.
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