Android :: How To Restore List Data / When Pressing "back" Button?
Mar 15, 2010
My question is about restoring complex activity related data when coming back to the activity using the "back" button". Activity A has a ListView which is connected to Array Adapter serving as its data source - this happens in on Create(). By default, if I move to activity B and press "back" to get back to activity A, does my list stay intact with all the data or do I just get visual "copy" of the screen but the data is lost? What can I do when more than activities are involved? Let's say activity A starts activity B which starts activity C and then I press "back" twice to get to A. How do I ensure the integrity of the A's data when it gets back to the foreground? Prefs Manager does not seem to handle complex object very intuitively.
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Mar 19, 2010
I created and binded a service in an activity and I would like to know how I can avoiding the android application to stop when I press the back button. When the back button is pressed the onDestroy method is called and I unbinded the service in this method. I try to prevent it by taking care of the back button event and manually call for onStop() method but it always called onDestroy after, why?
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May 6, 2009
Whenever I press the home button when Im in the root task of my application and when I click on the icon of my app again the state of my task (activity) is retained, but when i press the back button on the emulator and when I open my application its state is not retained. I want the state to be retained in both the scenarios.
In the mnifest I have given the below entries,
android:alwaysRetainTaskState="true" for the root activity
android:launchMode="singleTask" for the application
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Jul 15, 2010
When i leave my app after pressing home button and then re launch it from menus it behaves in a strange way.Sometimes it launches the same activity on which i pressed home button.But sometimes it launches the first activity of my app. One reason for this could be that whenever system has memory shortage it clears any activities existing in But the strange thing is if i press back button from first activity it takes me back to the same activity on which i pressed home button and all other previous activities are also there(like if i press back button again previous activities also exist.)I haven't set any launching mode for any activity in my app(like single instance etc).What i don't need is that previous activities load on pressing back button on first activity.
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Feb 27, 2010
I notice on my eris that when i am on a menu with a black background that if i hit my back (bottom button) a little firmly, right above the button on the lcd kind of changes colors. Like if you press your laptop screen, its only a little bit though. If you could, please try this and report back.
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Aug 8, 2010
When you're in the browser long pressing on the back button takes you straight to the history page, very useful.
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Mar 1, 2010
on intent when user press back button should exit from the application, how can i track back button and exit from the app?
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Apr 10, 2009
I have a message application so that on view 1 is displayed a list of messages and when you go to view 2 (subactivity) you can send a message. I want the program to work so that when you hit the android back button, you can go back to view 1 and see the list of messages including the new message. Right now only the old data is displayed, and I noticed that displayContent() is not called when going back which I assumed it would. Is there any way to specify that when the back button is hit, to call displayContent() again on the previous activity?
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Nov 18, 2010
Anyone else had abny issues with the back up restore function? I tried to do a software update, to which something seems to have happened. All i can see for the time being is an update to the virtual keyboard. Anyway, lost apps, contacts etc, so went into the menu on the handset and selected back up, restore. Restored numbers etc to phone book and over 150 number details are missing. The back up utility doesn't seem to have backed up all my numbers. Also, any personal photo's of callers etc have either vanished or the photo's are now against the wrong people. So much for this back up service, it's going to take hours, if not days to try to get the phone back tot he way it was!
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Mar 11, 2010
I use my phone as an audio player while outside with a bluetooth headset. I have the phone in my pocket. However,it seems very easy for the side buttons to be pressed, even when the phone is locked. What do you all do for this? I have tried a couple things and did find a "solution", but it's not one that I like, and would appreciate hearing thoughts from others.
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May 10, 2010
I've heard that pressing the back button will essentially cause the current Activity to finish(). Is this always the case? Seems like it would be with the way it pops the Activity off the stack.
The one situation I'm not so sure about is when the root Activity in a Task has back pressed. I'm currently experiencing a very weird effect, described as follows:
On loading my application, the first Activity is for initialization, and once it finishes, it calls my main Activity (a TabActivity). This first init activity has android:noHistory="true" set in the Manifest so pressing Back from my main Activity won't go back to that. It goes to the Launcher. When I click on my App in the Launcher a second time, the initialization activity loads again, and loads the main Activity when done. Almost immediately after, it loads a second instance of my main Activity. But ONLY after the Application has already been run once, and was exited by pressing BACK from the main Activity. It does it every subsequent time until I force quit the app or load a new version from the IDE.
Based on this, I am suspecting some kind of Activity instance is lying around and being reused, since it only happens on the second+ time I run the application (and exit with BACK -- using HOME just returns to the last state of the app, no big deal).
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Nov 9, 2010
I need to develop an application with downloads the data at the background and update about the progress in the front.
I guess this can be achieved using services and activity and passing data in between the. But, what I need to do is even if I hit back button and then start the activity again. It should check if the service is running or not. If service is not running it should start one else it should display the data from running service.
Something like music player where music is played by a service at a background and activity displays the information. Even on browsing through other activities of the application or hitting back, state of the music player is maintained.
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Oct 9, 2010
I have a pattern unlock on my Samsung Galaxy S 19000. If I want to lock my screen manually I simply press the power button briefly which works fine. I now use a skin on my phone which doesn't allow for easy access to this power button so I'm wondering if there's an app that I can use to lock my phone screen without having to press the power button. I have looked at "lock 2.0", however, it seems to be more for actually unlocking the screen.
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Mar 30, 2010
I'm new to Android and just starting the very basics. I implement my custom button skin using .9.png images for norma/focus/pressed states. It works fine, but I noticed that after a pressed the focussed button it visually "lost" focus and draws the normal state frame. I planned to use different state images to highloght what button is selected right now, but it seems that it would not work. I noticed also that the same happens with the default LAF button. Is it OK, or it's just emulator issue? What the good workaroud can be used?
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Mar 30, 2010
I want to be able to show the elapsed time in a textview or Chronometer held in a "Statistics" class since pressing a button located in another class. What would be the easiest way to implement this?
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Oct 18, 2010
Has anyone seen a a onItemSelected not being called when using a spinner inside a listviewActivity. I have the code below Inside a listViewActivity. The spinner is shown on screen by pressing a button (not the spinner) which in turn calls performClick() on the spinner. When I select an item from the spinner the onItemSelected function is not called. Does anyone know why this might be? Code...
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Feb 27, 2012
I'm building a comic strip styled application and I'm trying to make "previous page" and "next page" buttons.
Right now, I have an image that spans 500 x 200 (not really, but it works). Over top of that image, I have two buttons equal to 50% of each side. When you click the left button, I want it to change the image to whatever-x. When you click the right button, I want it to change the image to whatever-y.
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Nov 14, 2010
I'm working on an android app and I'm stuck. Here's the scenario that I have: The user picks a contact to call The user presses the dialer button to call that contact Android's native dial screen pops up i.e. Dialing Contact screen Here's what I want to do: after pressing the dialer button, is there any way for my app to control what pops up after pressing the dialer button?
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Mar 21, 2010
I show to user a list of categories, he must choose one.
How to force the user to choose before pressing back?
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Nov 13, 2010
This is difficult for me to diagnose because the Log doesn't provide the offending code line that indicates what caused it.Running the app in the Emulator seems to work OK until I press Home or Back from the Main Activity. Using Back between the activities in the program seems to work OK, it only fails at the Main. I don't have the app finished yet so I haven't loaded it to a device yet.The Log says there was a null pointer exception so I would like to find why.The log points to the android routines (and I don't appear to have the source for those routines in the emulator-most but not all and these are refering to those I can't access). The log gives up at one point and says "11 more".It would be nice to see the remaining 11 in the hopes that one of them points to the line in my code that caused the offense.I'm looking for ideas on ways to find the error and hopefully cure it.
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Apr 29, 2010
I want to be able to wake the phone by pressing the trackpad button. (like the iPhone's home button, just converted ) I've looked around and can't seem to find a way to set this. I tried the "lockbot" app someone had recommended but it did more then i wanted and still didn't seem to enable that button to wake the phone. Any ideas?
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Aug 4, 2010
I just got the vibrant about a week ago, and so far no major issues. Still fumbling around in the apps market for the good stuff. One thing I found annoying was having to press the power/unlock button and then swiping the screen to unlock the phone every time, is there anything in the market or some setting to avoid pressing the button and just swiping the screen or possibly using the touch buttons on the front of the phone then swiping?
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Jul 9, 2013
I upgraded my Galaxy S2 (Straight Talk) to CM10.
Now whenever I press the home button, it brings up CM10's home screen.
How do I bind ADW to the home button?
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Nov 8, 2010
I recently updated my Mini Pro to Android 2.1, I followed the steps on the sonyericssonsupport YouTube video. I did a Backup of all my stuff on the phone, when I'd updated my phone and turned it on it asked me to setup the phone again with the Language, Time & Date etc and now when I try to restore my settings it says "Could Not Restore" when it is almost done.
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Jul 30, 2010
Is there any way to make it so when i press and hold the power button and choose either silent or vibrant only that it will also mute media? I am hoping for the ability to change something through adb shell or something because I use the power button method all the time I just really want it to mute/unmute the media volume too.
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Nov 7, 2009
When I'm talking, my hair tends to press the mute button on the home screen and the other person cannot hear me. I've searched but can't find a way to make this stop. An app, a better phone-holding technique--I'll try just about anything. Also, for some reason I had a glitch the other day... I made a phone call, got my friend's voicemail, and then was unable to hang up the call. I ended up leaving a rather long, embarrassing voicemail message until I just went in and force stopped the dialer app, but at least my friend has a good sense of humor.
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Sep 27, 2010
Motorola Droid 2.2 Froyo rooted Bugless Beast 0.5. Randomly (Maybe 2/5) when I press home from the browser, an application, ending a call, etc. All of my icons will disappear for 4-5 seconds. Please tell me if you know of a fix or anything about this problem, I've seen other topics about this but no solutions that worked.
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May 20, 2010
Does anyone know of any way to get the Incredible to wake up by pressing the optical trac-pad on the front instead of the power button up top?
I find the power button to be annoying and wish both would "wake-up" the screen.
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Feb 23, 2013
i focus my eyes on /sys/class/leds/button-backlight/, however, i can just turn off the backlight.
i found that the trigger in it can do complex work, so i tested it, and found some codes below
Code:
[none] rfkill0 mmc0 mmc1 mmc2 timer heartbeat sleep rfkill1 rfkill2 max8903a-usb-online max8903a-ac-online battery-charging-or-full battery-charging battery-full battery-charging-blink-full-solid
however, i haven't found the one i want.
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Mar 26, 2014
Anyways, whenever i'm listening to music, and I press the play/pause button on my headset to control my music tracks, my phone turns on. This get's really annoying because every time my phone turns on, it stays on for a few seconds, and this really kills battery life. I've tried lurking around my phone's settings and even my launcher settings.
My phone is a rooted HTC Wildfire S running AOKP custom rom with Nova Launcher Prime. And if it makes any difference, I'm using the "Start" lock screen from the Play Store.
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