Android :: Save And Restore A MapView In Droid?
Feb 1, 2010
I have a MapActivity that contains a MapView with some custom controls, state information, and an ItemizedOverlay composed by some locations that I draw using the default approach (using populate(), super.draw() and createItem()) and by some lines that I draw in the overrided draw() method.
So, when the activity is paused, I have to save:
Some state information
The ItemizedOverlay
[Maybe more Overlays in the future.]
I'm saving the state information as usual, putting them in the bundle. I'm thinking in doing the same with the Overlays, implementing Parcelablein each one of the OverlayItems and so, but I don't know if there is a better way to store the complete state of the MapViews.
The information depends on remote requests that I don't want to repeat each time the activity is paused. Any recommendation?
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Jul 16, 2010
I had found a lot of stackoverflow post about save an Activity and the reload it.
My question: How can I have an Activity with an MapView and after reload the same mapview?
What is the best way to switch between activity and views?
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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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Jun 1, 2009
I have an application which uses a cookie to tie a user to a session on my server.
Is there a simple way to save and restore this cookie to a SQLiteDatabase so that the user does not have to reacquire the cookie every time the app starts?
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Nov 7, 2010
As usual in android, each time the screen is flipped to portrait/landscape mode an Activity runs through life-cycle from onSaveInstanceState to onDestroy and then is recreated.In my Activity there's a ButtonText which can be changed by the user. It's reseted to the initial state, but I have to save the last state somehow. How can I achieve that, will I have to override onSaveInstanceState? Can someone show an example?
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Sep 27, 2009
This is with the 1.6 & 1.5 SDKs, not tried earlier ones. When you switch from portrait to landscape the onSaveInstanceState()/ onRestoreInstanceState() pair are called once, but when going back from landscape to portrait they are called twice, unless I've missed something. To test, see the log after creating a default Hello World app and change the main class like this: code...
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Oct 16, 2010
How do i reinstall saved apps and settings when i have flashed a new rom .Iassume it is possible .
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Sep 10, 2010
I'm considering trying one of the ROMs available here for my behold 2.Will I lose all the apps and other user data I have?If so, is there a way to save the apps/information and then restore it after the flash ?I have a few paid apps in particular that I'd prefer not to lose.
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Mar 7, 2010
I Installed Smoked Glass V5.0 from V4.5. I ended up doing it twice, and to make a long story short I lost my files in AK Notebook.
Here's my question:
1. Should I backup my current configuration
2. Then "Restore" my backup prior to upgrade
3. Grab my files (hoping they will be there) toss them on my mac
4. Then just "Restore" back to where I am now?
Need those files by tomorrow, any assistance is much appreciated. It's not that it's an emergency without them, but I will have to do some legwork to gather that info again.
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Jun 20, 2010
I have installed PC Companion but every 2-3 days it announce me a new update for my phone X10mini.Is it possible to know which bugs are fixed in each update before proceeding ?Is there a way to save all data before upgrading and restore after upgrading ? (sms, sounds, accounts, software, note, alert, phonebook etc)
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Feb 17, 2010
How to get MapView API in android?
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Mar 19, 2010
I working on map view. i want to put overlay item on the map view. that overlay items are all depends on currently showing map view and zoom level. how to get current map view's longitude and latitude of that four corner and how to analyze how many overlay item inside it. also we have to check thee zoom level.Any Idea? how to do it?
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Feb 16, 2010
I am doing one small GPS application. I have to show multiple palces . I can able to show multiple places using custom overlay method.Now i have to show route between two points , while showing route i have to show only that two points. remaining all points should disappear but i don't know how to disappear the other points.
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Aug 31, 2010
Just wondering if there is a standard/default overlay/marker that I can use in the MAPVIEW?
I have been searching on the web and all tutorials talk about extending the Overlay and put your custom image on it.
Is there a easier way? I just want to have the a marker, nothing fancy.
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Jan 16, 2010
I have a MapView that I'm displaying a "useful radius" (think accuracy of coordinate) in. Using MapView's Projection's metersToEquatorPixels, which is admittedly just for equatorial distance) isn't giving me an accurate enough distance (in pixels). How would you compute this if you wanted to display a circle around your coordinate, given radius?
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Sep 25, 2010
I'm working on an application that displays the location of moving items on a Google MapView. I need a way to update the position of the icons that represent the items (as well as change the facing of the icons every two seconds as updated data comes in). I currently have an activity in the app that extends MapActivity. On to this I have overlaid a static Overlay that draws some lines on the map and an ItemizedOverlay that draws a static icon.
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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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Aug 9, 2010
Today the rom bug bit me and I tried about 3 or 4 different roms (after TIbackup and nand backup of course) including xtrROM and ELB, hated them all, and decided to go back to my beloved sense-able 3.1 nand backup.
wiped, restored, and now all my market links are gone. (except for gmaps, for some reason). TIbackup refuses to even install again from the market because the package signature is incorrect, or something. TIb said it was supposed to restore market links.any suggestions? is there even any way to restore a market link besides just reinstalling the program outright? I found this thread http://androidforums.com/all-things-root-hero/81290-market-does-not-see-all-my-downloads-after-nandroid-restore.html as reference. All my programs will show as "installed" if I search them in market.either way, sense-able was definitely the sexiest-out of the box ROM I tried. everything else without sense was just ugh, looked like I'd loaded up a G1. couldn't tell a speed difference at all with the same setCPU profile, and xtrROM was so bad on battery I only made it through few hours before uninstalling. I cannot live with the sense keyboard and search-dialer.
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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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Mar 26, 2014
I have a Nabi 2 that was rooted almost a year ago to gain access to the Google Play store.My needs have changed since then and I wanted to restore it to factory settings.
If I boot normally the Nabi is stuck here:
I have managed to get it to boot to TRWP by pressing the power and + keys. I see this:
There are no images to "restore" under the restore tab. This is what I see:
provide me with a kernel file or some tips on how to restore the machine to it's 'out-of-the-box' configuration. I want to donate this device to a young child and need to get it back into a kid friendly mode.
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Jul 11, 2010
cant nandroid restore error: run 'nandroid-mobile.sh restore' via adb!this is the error message i get every time i try to restore a new android.what is up with this?
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Apr 19, 2014
I have a Motorola Moto G 8GB which is running very low on storage (only about 800mb left). This phone does not take Micro SD cards but it comes with 50GB Google Drive storage. However i haven't used this at all. I am wondering whether i could download android apps and games to google drive, dropbox etc. Games like Real Racing take up about 1GB so i cannot download it to my phone. Can i download it to the Cloud? If this is not possible, is there any way that i could save the app data on the cloud. E.g. The Simpsons: Tapped Out is about 37mb to download off the play store, but then you must download the updates etc which are about another 250mb. is there anyway to save this 250mb on the cloud. Or any other games data.
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Apr 16, 2009
I followed the steps in document to display MapView. But blank grid is displayed instead of google map. My code...
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May 3, 2009
I've just downloaded the Cupcake SDK. I'm afraid I can't find MapView anymore...
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Sep 28, 2009
My problem is my MapView becoming very laggy and so non-responsive at times, that Android thinks its hit deadlock and tries to close it.
I am adding 60 overlays to the map view and i originally thought that the icon size may be causing the problem by using up all the memory. When i decreased the overlay icon size, it did improve things, though it is still to slow to be usable. Has anyone experienced anything similar and have a workaround? There may be a better way of doing it other then extending the Hello MapView example.
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Sep 28, 2010
I have subclassed Overlay as LandMarkOverlay (and implemented an onTap(GeoPoint) method).
In the main activity I do this:
setContentView(R.layout.main);
MapView mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
landmarkOverlay = new LandmarkOverlay();
//add the landmarkOverlay to the list
mapView.getOverlays().add(landmarkOverlay);
What else do I need to do so that when the user taps the screen, landmarkOverlay's onTap(GeoPoint) method gets called?
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Aug 25, 2010
I have a DROID using Android 2.2
I am attempting to get the simplest MapActivity to run on the device. (NetBeans latest and greatest using a Google Api build target.)
I have all the appropriate Manifest entries, the simplest OnCreate --- > all it does is setContextView() to the xml with a mapview in it.
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Jul 24, 2010
I recently want to put mapview in tabhost but now is the question i can't figure out how to do this right!
here's my source code...
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Nov 22, 2010
I was switching roms last night and something didn't go through correctly.I restored my nandroid backup and everything is somewhat back to normal.Ti backup force closes on startup although I still have root. I don't really mind having to sbf, but my question deals with game progress. One game i have in mind is angry birds. Is there a way to save my game progress without using Ti backup.and saved the contents of this folder to a folder on the root of my sdcard. Can I simply overwrite these files after an sbf and clean rom install and maintain my progress? Will this general procedure work for anything? If not, what is the difference between this and "restoring" from ti backup?
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Sep 24, 2010
So here's a little tip that's part of Froyo (2.2). Backup and Restore. Apparently, if you need to do a factory reset and wipe the phone, by selecting this in your Privacy settings before the reset, your apps and settings will be restored from Google's servers to their previous state without having to do it all manually f. There's more info on the Moto Forum site here. I hope this actually does what it says it does and helps a few folks out.
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