Android :: Method Called After Release
Sep 22, 2010
I'm getting this error ( in the end of this post) which I guess I understand it's because I'm calling something after releasing it.. but I can't find a wy to work it around.I've tried all combinations.. I've tried: mCamera.setPreviewCallback(null); This class, where the surfaceview is implemented can be accessed by 2 different classes one that doesnt implement surfaceview and other that does the error just shows me when I go from the activity that uses the camera to the activity that also uses camera.I don't know what else to do.
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Oct 26, 2010
I am running into an issue with the way my asynctasks are executed. Here's the problem code:
firstTask = new background().new FirstTask(context);
if(firstTask.execute().get().toString().equals("1"))
secondTask = new background().new SecondTask(context);
What I'm doing here is creating a new asynctask object, assigning it to firstTask and then executing it. I then want to fire off a separate asynctask when the first one is done and making sure it returns a success value (1 in this case). This works perfectly on Android 2.0 and up. However, I am testing with Android 1.5 and problems start popping up. The code above will run the first asynctask but doInBackground() is never called despite onPreExecute() being called. If I am to execute the first task without the get() method, doInBackground() is called and everything works as expected. Except now I do not have a way to determine if the first task completed successfully so that I can tell the second task to execute. Is it safe to assume that this is a bug with asynctask on Android 1.5? Especially since the API says that the get method has been implemented since API 3. Is there any way to fix this? Or another way to determine that the first task has finished?
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Jul 2, 2010
Is the onUpgrade method of SQLiteOpenHelper ever called? If so, when is it called and by what? Or if it is not called by developers, then why is it there? What should be done in the method I have seen examples where it drops all the tables, but then a comment says that dropping all the tables is NOT what you should do.
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Sep 1, 2010
I am new to Android development and have been following the tutorials available on the Android website. I am currently on the section of tutorials for Views, specifically the one for Grid Views: Hello, Grid View Tutorial.I am having trouble understanding how views are made through an adapter. I understand that you must override the getView() method in your adapter class and in this method is where you define how your Views are set up. What I don't understand is where does getView() actually get called? Perhaps I've got the wrong kind of mentality here, but in the code below (the Grid View tutorial) I don't see any calls to getView() (or any other things used in the adapter class such as getCount()).
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Apr 15, 2010
I'm writing a Tetris application on Android for my bachelor thesis at the University of Hasselt. Currently I have a working Tetris base game, but it just keeps on ticking when the activity gets in the background. I'm trying to fix this by overwriting the onStop()and onRestart()methods.when I press my home button on my device I will go to my home screen and onStop() is called. Because the gamemode is now "PAUSE", the game wil not tick anymore. But now, when I longpress my home button and select my tetris activity again, the activity pops up, but it isn't ticking! This is because the onRestart() is never called when I return to play my application.What is the reason that this method is never called? Am I understanding the activity lifecycle wrong?
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Mar 21, 2010
a service started by a broadcast receiver starts an activity. I want to make it possible for this activity to communicate back to the service. I have chosen to use AIDL to make it possible. Everything seems works good except for bindService() method called in onCreate() of the activity. bindService(), in fact, throws a null pointer exception because onServiceConnected() is never called while onBind() method of the service is. Anyway bindService() returns true.The service is obviously active because it starts the activity.I know that calling an activity from a service could sound strange, but unfortunately this is the only way to have speech recognition in a service.
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Mar 3, 2010
I'm trying to prevent my application to call the same method twice in the event of a double-click, or if the user presses different buttons quickly, almost at the same time.I have clickable Views, acting as buttons, that call the same method but passing different parameters.Inside this method I'm creating a new Thread, because it queries a web server for the result.The problem is that upon two quick clicks, the method is fired twice, two threads are created, and consequently two new activities are created. That makes my app crash.But this only seems to work on slower phones like the G1, I tried on Nexus and before it set blocked = true, the second request has was granted. So is there any way I can block the method being called if it's already running, or if the thread has started so it wont create a new one.
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Mar 5, 2010
I was wondering how should I proceed to debug while working with frameworks. Like specifically how can i tell which method is being called when a particular event happens.
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Feb 19, 2010
I added a BroadCastReceiver to my application.I want to call my inputMethod's method but I can't find a way to access it's instance.but I couldn't find a way to get the the InputMethod instance from the InputMethodManager.Is doing a singleton the only way to access it?
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Apr 21, 2010
I'm trying to modify the SurfaceView I use for doing a camera preview in order to display an overlaying square. However, the onDraw method of the extended SurfaceView is never called.
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Nov 24, 2010
i have an app that haves a lot of activitys, all created with ONACTIVITYRESULT.which method is called when i press back key? i need to know it because i have to override/implement code on it
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Aug 27, 2010
I have some code in the onCreate method an Activity and noticed that it is being called three times. Is it normal behaviour?
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Oct 1, 2010
In my android app I call the voice recognition in my onCreate method of my startup activity. I have made it a preference to start up with the voice control or not. However, the app takes about 5-7 seconds to load when voice recognition is on. When it is off, the app starts almost instantly. Below is sample code, I have added Free_Form, max_results 1, and a custom prompt to mine.Why would calling the normal android speech recognition take sooo long to load in my OnCreate method?
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Sep 7, 2010
I'm trying to override the onBackPressed() method of the ActivityGroup class:
public class MyClass extends ActivityGroup {
@Override
public void onBackPressed() {
// do something
return;
}
but I'm getting the error The method onBackPressed() of type MyClass must override a superclass method. I'm relatively new to Java, I've seen here that people do it and it works for them Why I'm getting this error? I'm writing an app for android 1.5, could the problem be here?
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Nov 22, 2010
In Eclipse, when I mouse hover over a built-in method, it displays a method definition including stuff like what the method does, input objects, return objects etc. If I have a yellow line (warning) under the method I'm trying to use, I can't get the mouse-over to show the definition. If I try hitting F3, I get a "The Jar of this class file belongs to container "Android 1.6" How do I show the definition of the method I am using when there is a warning?
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May 12, 2010
I am trying to use annotation - method.getAnnotation( ) or method.isAnnotationPresent( ) and it is not working. I am using eclipse emulator for 2.1 OS version with JDK 1.6. Following is information about what I did..................
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Nov 1, 2010
I created a method called insertTable in a class called Table but i can't use it in my onClick method in the main class :
CODE:.......
I want to do a income.insertTable in the onClick method but eclipse say that i need to create a local variable.
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Jun 6, 2010
Basically I'm calling the onDraw method like so...
code:...................
You see I'm drawing it on top of a Camera view and the information being drawn is subject to change. I have a listener setup which will update the variables being drawn at the appropriate time but I now want to "refresh" this draw in that listener.
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May 29, 2010
Just a heads up - ADW Launcher (in my opinion the best launcher available) is now in the Market (free!)? Many bug fixes over the release candidates. Use it, love it, if you haven't tried it, GET IT!
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May 17, 2010
I was wondering what people do to limit the phones that can purchase my app on Android Market. I image I can limit this to some extent by using the API levels in the manifest but can I limit my app to just Droid/Milestone? I have only tested the app on these phones so I can't be sure that it will work on others. There are known issues with the Milestone and choosing an OpenGL config, among other issues, that I had to work around so it's not unreasonable that other phones can have similar issues. Also how do you do dynamic licenses via http post?
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May 22, 2009
I have a problem with firing an activity that extends MapActivity. When it gets called, it throws a java.lang.NoClassDefFoundError... not sure what this is supposed to mean. I think something goes wrong with the external implementation of the maps API (maps.jar). Has anyone come across that problem? Here's the srack trace:
CODE:....................
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Feb 27, 2010
I have two android projects, ProjA requires ProjB (in Eclipse Properties > Java Build Path > Projects > Add > ProjB). Every thing compiles ok in Eclipse, but when I run ProjA I get an error: Could not find method XXX, referenced from method YYY. Where XXX - is the method from ProjB. How can I fix the settings?
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Aug 28, 2010
the title say it all. I wanna know a corresponding method in Android/Java that is like the GetTickCount method in C#/C++?
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May 4, 2009
I am following the instructions on code signing on the Android Developer site, and it mentions that if you specify that you want to compile in Debug mode, it automatically signs the resulting file with a debug key. It also says that if you specify that Eclipse should compile in Release mode, that you can use the Export Wizard to generate a private key and handle the distribution signing.
Can someone point me to the setting in Eclipse for Release vs. Debug compiling. When I use the Export Wizard, I am only given the option to export unsigned. I am pretty sure I am stuck in Debug mode, since my app has no problem running in the emulator or my tethered G1.
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Mar 4, 2009
I have a so called reliable resource who works in the T-mobile store, and so far he has been right about anything to do with G1. He predicted the OTA release, and that was right, but he has also said T- mobile will be releasing the cupcake to t-mobile customers in uk end of March. Of course all i/we can do is wait. if anyone has any information to back that claim it would be appreciated. I know there's loads of cupcake talk that has been going on for months. but i believe this is the real thing, else he wouldn't jeapordise these claims to get people to buy the G1 and then get hundreds of complaints if it didnt happen
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Dec 16, 2009
It doesn't seems as if the the stop and release immediately terminates the audio played by the MODE_STREAM track. It looks like it finishes playing the rest of the buffer and then stops.
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Jul 10, 2009
I want to release a demo version of my app. I added a restriction that the app could only be used 5 times by storing a counter in the db. However a user can easily uninstall and install the demo again! What the best way to manage this?
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Sep 15, 2009
When I use wake lock to screen at the specific time on the device as follows code. But every time I release this wake lock, the screen will force to close. I think it must to release the wake lock, or screen will always on. It's wasting power. Does anyone knows how to release the screen wake lock and don't need to close the screen?
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Oct 28, 2010
Is there a way to change free app into paid app in Market? I.e. you release com.foo.xxx as free but later you'd like to charge for app and drop free version completely.. I do not see anything like this in Market console at the moment. I know I can release com.foo.xxx.pro for example but my intention would be to keep package name as is so current users would see there's upgrade available. Alternatively, if there's no way to do that can I completely remove app from market so com. would be reusable for other app?
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Mar 16, 2009
What percentage of users are going to have 1.1 upgrade? Don't want to be flooded by 1 star feedbacks!
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