Android :: Manage Simultaneous Activities In Android
Aug 30, 2010How can i improve the performance of simultaneous processes agains the time and space in androied?
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Android :: How To Manage Activities?
Jul 24, 2010i identified problem in changing one activity using tab, in on tab activity i am adding data to sqlite in other tab activity i am displaying them using listview(array adapter)but when i come back to add data and after adding new item to sqlite the newly added records are not updated in listview.
View 3 Replies View RelatedAndroid : Way To Manage Orientation Dependent Activities?
Mar 11, 2010I have two activities, one per orientation - PortraitActivity and LandscapeActivity. They are pretty much different, I can't use one Activity with different layouts. If user changed orientation I have to shutdown one of them and start another. What is the best way to manage them? Does it make sense to create GroupActivity? Or each Activity should check if the current orientation is what it needs? If so, is it save to start new Activity in onCreate method of previous one (which is not actually created yet)?
View 5 Replies View RelatedAndroid :: Manage Multiples Activities Under A Single Tab Of TabActivity?
Jul 8, 2010In my app, I have 5 tabs which contains activities. In each of them, I have to show differents screens. For example, the main activity of a tab is a listview, and when I click on one of its item, I want to display a second screen with an other listview, that will display an other screen when the user will select an item etc.
So I knew that activities in tabs are not easy to manage, but I really think that I needed this solution. Indeed, each screen must contain a back button, which will return to the previous screen, with the previous state (the same position in the list).
To start new activities inside the tabs, I used the technique described here http://gamma-point.com/content/android-how-have-multiple-activities-under-single-tab-tabactivity
It works mostly well, but I encounter a problem to go back to the previous activities. My solution at the moment consists in starting the previous activity like it's described on this website, but without any flag.
So here are my two real problems:
When I try to go back to the first and main activity of the tab, it seems that a new instance is created, even if I use the flag Intent.FLAG_ACTIVITY_CLEAR_TOP. So when I do several roundtrips between this activity and the next one, i obtain a StackErrorOverFlow.
Because the activities are accessible from differents activities, I have to memorize the parents activities all the time, by giving them in the intents. It's really heavy when I have a succession of 5 or 6 screens, I have to memorize the grand grand parent if the activity... I really appreciate if I just could call the last Activity started by the localActivityManager.
Android :: Switching Activities / Passing Data Between Activities
Jun 30, 2010how to call BarCodeScanner, and return the value to a field.so now, i have a toast that says "successful scan" and then i want to pass the result to a new activity. when i comment out my intent, everything works (minus the passing of data/switching of screen, obviously) but when i run my project as is, it FC's no errors reported by eclipse in code or xml. any insights?
View 2 Replies View RelatedAndroid :: More AsyncTask - Simultaneous Downloads
Sep 10, 2010Implementing a service to handle connection changes and downloads. The service handles a queue of AsyncTasks, each representing a "download task". This way, we can cancel/pause tasks when connection drops, and also restore them when connection is reestablished. Since the threads AsyncTasks are run are not deterministic, how many ATs should I execute() at the same time?
I've read that I shouldn't reuse tasks. How can I achieve this pause->resume functionality then? Should I tell the thread to sleep? Should I make a no-op while if connection is down? I was trusting the cancel(true) method, which I've read is not reliable either.
My main DownloadTask is a subclass of AsyncTask that returns a new AsyncTask to be called when the connection is restored.
Android :: Handle Simultaneous Key Press
Dec 14, 2009I was wondering whether Androd can catch simultaneous Key Press. For example, a application does something when a user press HOME and MENU key simultaneously. Is it a possible scenario?
View 4 Replies View RelatedAndroid :: Simultaneous Photography Using Andriod
Jan 28, 2009I am working on an art project with several other people that involves simultaneity and photography. We want to coordinate a series of events involving simultaneous photographs based on the Android system.
In simple terms, here is what we are proposing. Someone writes an app for Android Phone/Camera that makes the camera take a photograph at a predetermined time so that many thousands of people all take a simultaneous photograph. The art involved here is not only the synchronizing of the event to approximate simultaneity but also making "social networking" into an element of an art project.
Android :: Simultaneous Http Requests
Jan 13, 2010Is there a limit on the number of simultaneous http requests of the form:
HttpResponse response = client.execute(request);
I'm interested in any official limit as well as practical ones.
(In a previous life, you had to dig deep to discover that WinMo only allowed three WebRequests to be open at a time.)
Let's say I have a list of 20 files to download on a background thread.
Should I: Download them one at a time, blocking the thread (but not the UI thread) to wait for each one? Start 20 threads each downloading one of the files?
I expect the answer may be somewhere in between, where I create C threads and work on the queue of N files, where C is a number like 3 or 4.
I suspect some of you here have already done some experimentation and know the magic number. In addition, I suspect there may be more efficient ways of doing what I'm doing than creating a new DefaultHttpClient for each request.
Android :: MediaRecorder - MediaPlayer Simultaneous Use
Apr 16, 2010With reference to this discussion, does this mean that simultaneous Record and Playback with Mediarecorder and Mediaplayer is not possible at this point?
View 3 Replies View RelatedAndroid :: AsyncTask And Simultaneous Network Downloads
Jan 28, 2010I am performing several https posts and http downloads from two different servers using AsyncTasks. The connections are fairly quick but I'm surprised to see that they are running synchronously instead of in parallel.
To be more explicit, here is pseudo-code for what's happening when I initiate a call to AsyncTask1():
CODE:..............
Android :: Writing - Reading From A File Simultaneous
Oct 27, 2010I'm trying to read from a file while it still opened for witing.
View 2 Replies View RelatedAndroid :: Disable Simultaneous Search On Call Log & Contacts?
Oct 10, 2010I just installed the latest DialerOne (1.2.7.1) from the Market and find that the new simultaneous search of the call log and contacts is annoying in that it places call log entries at the top of the list, and tapping on them brings up the call history for that contact instead of listing their numbers so you can choose one to dial. I don't see any way to turn this off.Am I missing something?It would seem natural to have the ability to limit the search to the screen presented (search only the call log when the call log is displayed, or search only the contacts when contacts are displayed), but I have Dialer One display the call log by default, so that I can quickly call a recently called contact, or just start dialing to search, so this wouldn't work for me either.I would much rather go back to the way it used to be. Of course, I figured I didn't need to backup the previous version because after all, what could change? Now I have this, and the coloring of the digits on the keypad is weird, even after adjusting it as much as possible.
View 5 Replies View RelatedAndroid : How Many Simultaneous Threads Can A Single App Execute In Parallel?
Oct 14, 2010I have an android app, where in a list view for each element in list, I load an image from web in a separate thread. So if there are 8 items displayed in list view, activity will try to fire 8 different threads, one for each list item to load an image. As you scroll down the list, the number of threads may increase if the previous threads haven't finished executing.
I am curious to know how many simultaneous threads can a single android app execute in parallel? Is there a limit? I wouldn't expect these threads to cause a ANR over slow internet connection as they are independent? But it seems that ANR does happen and may be it's because app/device run low on resources, so spawning a new activity in UI takes more than 5 seconds which results in an ANR?
Any clues to how I can make responsiveness better on a slow internet connection will be appreciated.
Android - How To Run Code Depending On Simultaneous Hard Key Press
Mar 19, 2014I am trying to implement a functionality when i press the VOLUME DOWN and POWER BUTTON simultaneously; i must be able to run a method code inside my Activity.
public boolean onKeyUp(int keyCode, KeyEvent event)
{
}
From my initial search; it seems that only one such key press event is acknowledged at a time in Android usng the onKeyUp method. Is it true?
In my Android phone, on simultaneously pressing POWER BUTTON as well as MENU BUTTON i am able to capture a screen shot.
Does this feature not acknowledge simultaneous key presses?
HTC EVO 4G :: Simultaneous Voice And Data
Nov 25, 2010If you don't need 3G on to do voice calls, then why would having it on not allow you to use your data connection while on a voice call?
View 9 Replies View RelatedHTC EVO 4G :: Simultaneous Update Of All The Apps
Aug 4, 2010I just saw a video of a Verizon guy that got FROYO already. They were showing the changes included in 2.2 and it had the option to update all the apps at the same time or something similar. I thought that was art of 2.2.
View 2 Replies View RelatedHTC EVO 4G :: Simultaneous Data And Voice
Mar 29, 2010I probably don't need it persay...But! I want it! Just to have the peace of mind that phone calls won't interupt stuff. There have been times that I could both at the same time. Anyone think it might be implementef later? This is a real dream killer for me.
View 35 Replies View RelatedHTC EVO 4G :: Simultaneous Talk And Data
Jun 18, 2010Is this suppose to work only with 4G or am I missing something?
View 3 Replies View RelatedHTC Desire :: Simultaneous Call And Data
Apr 1, 2010Just started using my Desire last night! Feeling good.
However...
Was just on a call, tried to use the Android Marketplace. Couldn't. Got curious, and tried to use Google Maps mid call. Couldn't. Tried to use the internet during the call. Couldn't. Now, I'm on T-Mobile (UK) and have just come from a Nokia E71. With my E71 I could make a call and use Google Maps. Am I missing something or is this bit of multitasking somehow not possible?
HTC Hero :: IPhone Cant Run Simultaneous Apps
Oct 19, 2009I just wanted to check, e.g. on my Hero I can run GPS Tracker and press home and it will run in the background, play some music and press home and it will run in the background and go and do something else.
Are you saying the iPhone would have to completely exit the GPS Tracker to use another app or leave the GPS Tracker open and not do anything else for it to work?
Android :: How To Manage Objects ?
Sep 8, 2010I am new to Android development. I want to know how you all manage objects. For eg we make object as A a = new A(); and then manage that object. But, here, we call A.class; My concern is that i don't want to call on Create(),nor do i want to push UI screen I just want to make 1 static object for 1 screen;and want to manage it throughout my application. that is, instead of calling A.class; can i call A a = new A(),and manage that object without pushing,and whenever i need i push that screen. Is there someway?
View 1 Replies View RelatedAndroid :: Cannot Manage To Get ADB Working
May 25, 2010I want to start developing for android and for some reason whatever I do I can not make ADB show up my Nexus One. Both on and off in development mode. Both SD Mount and without SD Mount Both With USB tethering on and off for all "ADB devices"(windows XP64bit) show no device (service started successfully, device recognized in Device Manager correctly).
Tried reinstalling drivers, tried uninstalling drivers completely(using 3rd party software) and reinstalling, tried different versions of USB driver (up to the one before the last - that came with the 2.1 SDK). It seems online that this issue reoccurs on different devices, but all of them seemed to solve with one of the above solutions, Which none worked for me. It does not look like a hardware problem, because everything else that is USB'ed works correctly.
Android :: Best Way To Manage Contacts
Feb 13, 2010What is the best way to manage contacts, can u download your contacts?
View 2 Replies View RelatedAndroid :: Manage 2 Versions Of The Same Application?
Sep 3, 2009I want to use the same eclipse project to maintain only one source code (or two projects that refer to a generic project). My problem is that the names of the package have to be different on the market (eg: my.android.app.lite and my.android.app.pro). If the package names are differents, the generated java ressource files are differents (eg: my.android.app.lite.R.java and my.android.app.pro.R.java). So, the source files must point to differents R files according to the version (pro or lite) and I have to change all the import...
View 6 Replies View RelatedAndroid :: How To Manage Connection To A Socket?
Jun 21, 2010I would like to know what is the recommendation for socket connection management in Android?In our App we would like to be connected to a TCP/IP server when our app is in the foreground or paused. So, create a connection to a TCP/ IP server when the App starts basically, On Create of the launcher activity. However, we do not want to create a new connection and close connection every time an activity is created, paused, destroyed or orientation changed. So, we save the connection object in the App class and the activities will reuse the same connection.Question is when do I close it? I would like to close the socket when the App is "paused", "stopped" or "destroyed". The problem is these messages are not sent in the App context. How can I figure out if the App is in foreground or not? Even the "Terminated" event for an App is not guaranteed to be delivered. So, in that case how do I know when to disconnect?
View 2 Replies View RelatedAndroid :: How To Manage Event By 2 Widgets?
Jul 10, 2010I want to change how a gallery looks like. I want to add 2 jogs at each side, so looks like this:
http://omploader.org/vNHc2Yw/device.png
First approach was to add the "jogs" to the ImageAdapter (at the beginning and at the end) for the Gallery. The Gallery will show the items as usual, but It will apply the custom background and also if you specify spacing, you will get an ugly gallery. Also, I want the jog not to be centered as the others images. Then, I decided to download the whole api and modify the Gallery source in a way so to handle specially the first item and the last item of the adapter. But, I don't know how to compile the api alone. The Makefile in the root project will build 6gb of the whole android platform. If someone can explain me how to build just the API, I will be grateful.
The other approach was to compose Views. I thought to add ImageView's to the left and right corner and to be scrolled when needed, but when the Gallery capture the events I can't forward it to the holder of the ImageViews. So, I extend Gallery, and I override onScroll() like this:
super.onScroll(e1,e2,distanceX,distanceY); return false;
and also onTouchEvent() like this:
super.onTouchEvent(event); return false;
But unfortunately when I return false wihtin onTouchEvent() the Gallery does not scroll.
So, main questions are:
1) How can I compile the modified API to generete a MyGallery.class to be added to android.jar? If I modify the source code of Gallery.java I can manage the fill of the Gallery for the specific items I want (I already read the source code).
2) In other approach, Is it possible to handle one event by 2 widgets? If so, I could overlap the Gallery above a jog. The Gallery will scroll as he knows, and I will scroll as I want.
3) If those approachs are bad, what will you recommend ?
I don't get why the Gallery does not have this nice feature I want to implement, kind of: setBorders(left, right) and etc. The problem on extending Gallery, is that when you add a View (for instance, the "jog"), you specify a position. Gallery fills the gallery getting the Views of it container with: getChildAt(0) and getChildAt(numChildren -1) when filling to right and left, respectively. Then, it gathers the 'unseen' Views from the Adapter. So the added view (the 'jog') will be scrolled by Gallery, but when the view is no longer visible, the Gallery itself has no way to get back that view, as it's not in the Adapter.
HTC Desire :: How Well Does Android Manage Its Memory?
Jul 7, 2010I always hear that I don't need to use Task Killers as Android manages its own memory. However, I find that sometimes when I play emulators, killing tasks provides far better framerates.
View 2 Replies View RelatedAndroid :: Manage The Callback Of The Applications?
Apr 2, 2010in android application development, i frequently go through the word "CALLBACK" in many places. i want to know want it means to tell us technically. and how i can manage the callback of the applications.
View 2 Replies View RelatedAndroid :: Ways To Manage Project?
Nov 5, 2010I'm releasing my first app soon, and this is the first time I'm doing any of this on my own. Looking into the future of it, there are features I plan to implement within the coming months. But looking at me adding features, I realize I would be altering the original source, so if someone finds a bug, I need to either wait, or completely undo everything to fix it. What are some options for managing my source code and stuff?
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