Android : Keep User State In Droid?
Jun 30, 2010
I am developing an Android app that needs to receive specific informations for each user.
I made an authentication using GET and POST methods. Now I have the cookie delivered by the server when the username and password are correct.
How do I store this data? I looked for but couldn't find the best way to store a session in Android.
How applications like Foursquare, Facebook for example keep the state of an user? How do they persist data?
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Oct 27, 2010
I'm currently working on a project which requires the detection of user state (walking, running, driving), I've looked through some of the existing solutions on Android platform such as pedometer or calculating velocity with given acceleration, but I'm still unsure how I can approach this problem. Is there a way to accomplish this without much of data mining/signal processing? How can I solve this with simple logic? Or is this better solved with gps instead of accelerometer? The program will only need to return simple user-state descriptions like walking.
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May 2, 2010
I have an Activity with a list that is bound to a ListAdapter reading data into a ArrayList from a database. All is well when the data is first loaded. While the Activity is open and the list is being displayed it is possible and likely that the data in the database will be updated by a service but the list does not reflect the changes because the ArrayList does not know about the changes. If the Activity is no longer in the foreground as would be the case if the user goes to the home screen and then is brought back to the foreground I would like for the Activity to not display what it did prior but rather reload the data using the ListAdapter the view is bound to. I think something needs to call finish() but I am not sure what.
This is what I have in the Activity.
CODE:.......................
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Aug 11, 2010
I have a compound UI component built up from a ViewGroup containing a number of TextView, ImageView etc. components. Many of these have StateListDrawables as their images/backgrounds. Is there any way of making them select from this drawable based on the state of the parent ViewGroup rather than the component itself? Ideally I want to be able to change the visual state of all children of the ViewGroup (text colour, image etc) based on the state of the ViewGroup, preferably without having to hook up complex logical code. This seems like a fairly common sort of requirement, so I was hoping it would be straightforward in Android - am I going to be disappointed?
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Sep 22, 2010
I have a EditText in android in which i want the user to enter the text and checks for the condition "BYE"
Code sample..
How can i make user to enter the text?The UI should wait for the text to be entered(something like we have InputStreamReader in java applications).
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Feb 8, 2009
I'm a little confused by what I'm seeing with regards to phone state transitions via the PhoneStateListener. When I receive a call, this is what happens: (call comes in) RINGING -> IDLE (I pick up) OFFHOOK (I hang up) IDLE It's that first transition from RINGING to IDLE without any interaction from me (not ending the call, not answering the call) that confuses me. Do I really have to implement an idle counter to know that an incoming call has really ended? Seems like the reported phone state represents some sort of phone state that isn't the obvious one.Is this a bug or am I just not in tune with the paradigm here?
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Mar 3, 2010
I have had this same problem happen twice to me on 2 different phones on 2 different Verizon accounts!
The password screen locks and when it asks for the user name and password it states invalid user name / password!
Is this a known problem since when I called and talked to both Verizon and HTC the only thing they could tell me was to do a hard reset and they weren't aware of this problem?
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Aug 1, 2010
I am using the Android SDK icon-button for refresh (ic_menu_refresh) in a widget and I need to change the selection state when it is pressed. How is this done? Do I define an XML for the button?
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Nov 16, 2010
I'm developing an application which allows user to edit an image and save that edited image as new image on sd card I want to get the current state of the canvas object.
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Sep 11, 2010
I have some 34 checkboxes on one Activity which i have to mark and unmark. and I want to save the status of the each checkbox.
I want this persistently. So should i have a sqlite table or preferences ?
If sqlite table is recommended, then what should be the ideal table structure design?
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Apr 8, 2010
I am working on my App. in between i pressed the Home button on the device. my app will go to the background tasks. After that i long press the home button it will show my app as a persistent state. i.e where and what i had done in my app. But i click my app in the directory window it restarts my app. i want to do if my app is in the background tasks it will wake up else it will start. how to achieve that?
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Mar 9, 2010
I cant find a way to save the checkbox state when using a Cursor adapter. Everything else works fine but if i click on a checkbox it is repeated when it is recycled. Ive seen examples using array adapters but because of my lack of experience im finding it hard to translate it into using a cursor adapter. Could someone give me an example of how to go about it.code...
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Sep 20, 2010
I have noticed while working in the emulator that whenever i get out of my app via any method other than pressing the back button, my toggle button (if pressed) will have its state saved and return to that state when i return to the app. im guessing its because its value gets saved in a bundle and reloaded when i return. when i leave the app via the back button, this does not happen and the toggle is always off when i return. is there any way to get the value of the toggle back if the user leaves via the back button, without having to save the value in a db table? alternatively, if my apps notification is in the status bar, i can be confident that the toggle should always be selected, so if there is no way to save the state, is there a way to find out if my apps notification is currently being displayed? then it would be easy to just set the toggle each time via a quick check of the status bar.
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Feb 19, 2010
In Android, you need to implement the following Activity methods so your application can be restored to its previous state if the OS decides to destroy then recreate your activity:
public void onSaveInstanceState(Bundle savedInstanceState)
public void onRestoreInstanceState(Bundle savedInstanceState)
The examples I've seen of implementing these methods is to use put/getBoolean, put/getInt etc. on the Bundle object (i.e. primitive objects only) to save the application state. This seems hugely error prone way to save your state for a start and I cannot see how this scales to storing complex objects without writing lots of code.
What options do I have for storing/restoring state in a robust and easy to implement fashion?
In case it's important, my application (a game) needs to store about 50 objects, which each store maybe 5 float variables and some store references to other objects. I don't particularly want to have to write save/restore methods for every class and subclass (maybe about 15 of these) I use. It would be ideal if I could just stick all my state relevant objects in an object called "state" and then just call save/load on "state" to handle everything.
Is using Java serialization an option? I've heard it's very slow, but is that a problem for save/restoring? Could I just write my data to the SD card? To a database?
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Sep 17, 2010
I can not send messages out of my Webmail.. I followed the advice of the Droid 1 thing and changed my email format to IMAP, but that still didn't succeed. My settings are now as following:
General Settings:
Account Name: Webmail
Real name: My name
Email address: My email
Incoming Server:
IMAP Mail Server
Server: Email.psu.edu
Port: 993
Username: my email
Use Secure Connection and Verify Certificate are checked.
Outgoing server:
smtp.psu.edu
Port: 25
Secure Connection and Verify Certificate checked
Other settings:
# Of Messages to Sync: 25
I've tried everything but it just isn't working.
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Aug 12, 2010
I created a backup while following rooting instructions for mac (http://androidforums.com/htc-droid-eris/125436-detailed-leak-root-tutorial.html) so I figure I should be able to revert the phone back to its original state. How do I do this?
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Oct 4, 2010
Not sure why I have 2.2 rooted and its giving me this error. Anyone know why?
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Dec 30, 2009
The default HTC Weather app isn't working today after I restarted my phone after a test.
The Current location 1/2 says Albuquerque, New Mexico. It says "No weather data available"
The 2/2 entry I programed is Albuquerque, NM and that works.
I just added a 3rd Dallas, TX and that works.
Something is odd. It's using the long spelled out state name for the Current location and that doesn't seem to be found in the Weather server when it checks. Just the 2 letter state names seem to work.
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Apr 17, 2009
I am developing a webservice application for android. I need an End user IP for executing some calls to the server. Is there anything like IP for android phones that as in computers?
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Mar 16, 2010
I'd like to be able to create a special user account that would exist on an android device. Since it is based on the Linux kernel, I was hoping there was a way to create a group account and then create a user account. Is it possible ?
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Sep 29, 2009
In Android, how can I replace the user interface of an emulator by my own interface? I would like to start my own interface immediately as the emulator gets started and that the user can't use the original interface but the original interface is on the background.
Update:
Now my code looks like this...
As I run the program, Eclipse displays
ActivityManager: Warning: Activity not started, its current task has been brought to the front. Does anyone knows why?
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Oct 8, 2010
Is it possible to turn on one android and to run one application without the user have to chose the app?
The idea is to one ordinary user of the android only use the app in question, you see? Like a test or a demonstration of the app and the comum user only uses that app.
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Aug 17, 2010
I need to capture events when the user clicks on a tab in a TabHost. Something similar to OnTabChangeListener, but OnTabChangeListener only fires when the tab changes, not when it stays the same.
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Apr 18, 2010
I'm making an Android App, and i need to put a control that let user choose between 4 different colors. I want to do this with something like radio buttons: the problem is that radiobuttons are round...
is there a way to set them looks like square/rect buttons, and assign a color to their inside rect area ?
If not, how can i achieve that choose for the user ?
I need this because i'm making a Todo/Task android application, and i need the user to choose the priority of a task, between for priority level that are rapresented with a color. So i think to do that by showing 4 buttons, each with a different color associated, and a text inside ("0", "1", "2", "3")
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Feb 15, 2010
I wanted to go over a few things with everyone. Don't any of you take this the wrong way as I am just writing this to try and help everyone new to the scene.
When I first got into Android I had a G1, that was a little over a year ago. I used it stock for about 2 months and then started going to a site called xda developers. Some of you probably know about it, for those who don't it is a site that focuses on developing and hacking WinMo and Android. I learned a ton of stuff there, but at first it was SCARY, so much information and so many new technical terms I had never heard of before. I took my time reading things and asking people questions for about 2 weeks and when I was finally confident in myself I rooted my G1. It took me like 2+ hours to do it, I installed a new Recovery, flashed a new SPL and Radio, I even got a Sense UI ROM installed on it. It felt great.
Now here we are with a much higher spec'd phone, the Droid, and it has attracted a TON of new users. It is great because now Android is evolving faster then it ever has, and we are getting tons of new developers creating some amazing stuff. It has all happened so fast and a lot of you are trying to learn everything as quickly as possible. The Sholes SMUpdater app has made all of this VERY easy for anyone to do, but the problem with this is that now when something goes wrong you have no idea how to fix it. When you want to do some modifications that involve ADB or Terminal Emulator you have no knowledge on how they work. By skipping all the hard parts you have basically shorted yourself on TONS of knowledge which, to me, is sort of a requirement to rooting/rom flashing.
Now I agree that SMUpdater is a great tool to save time from having to learn everything, and it makes it easy to get the newest Sholes ROM. But there is SOOO much more to Android hacking/development then Sholes. When you want to try something new and different then what will you do? This is why I HIGHLY recommend that everyone does some heavy researching, take a weekend, or some blocks of free time, and read. Read until you can't see straight. Let it all sink in, and practice practice practice. I promise you will become such a better user, you will understand what is going on with the system.
If you don't study and learn, then what happens when something breaks? You can't always expect someone on a forum to come to your rescue. Of course there will always be things that happen which require some really advanced users to fix, and even I have t ask for help from time to time. But to not learn even the basics is just absurd, it hurts you and it hurts the community because we have to spend all our time fixing very basic and simple problems.
I hope no one here took offense to this because I am doing this to really help everyone here out. The more we all know then the more we can do.
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Apr 13, 2010
I wonder how you can make an advanced Android User interface where you can add for example a drag drop and more graphics options? is that by using OpenGl ?!
this is example of UI in iPhone Apps.
example 1
example 2
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Nov 4, 2009
Looking for a Dallas Based Android user group... anybody now of one?
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Nov 15, 2009
They sure didn't ship one with the phone. Is there a Droid (or Android 2.0) User's Guide on the web that gives detailed operation on all the Droid functions (including tips & tricks)? It sure would be handy!
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Sep 1, 2010
In my android application i would like to use time which do not come from device but a standard time that the user cannot change.
Is there any way to do this.
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Jan 9, 2010
I have an app where the user can choose a profile pic using images stored on the phone or SD. Do I have to write my own file explorer for this? I've seen a couple examples on anddev, but wasn't sure if there is another way.
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