Android : How Can I Manage Cache Of MapView?
Feb 1, 2010
I've made an application based on the Google Maps API. The problem is that my application is made to be used in the wild, in places where there is no network. So I would like to manage the cache in order to ensure that specific tiles are saved and available during the trip (I'd like to redirect them in database but any method may do). For now, I didn't found any other method (not tested) than try to recode the MapView class. I'm focusing on Google API in order to have satellite photography (for places where there are no roads). What could I do ?
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Oct 3, 2010
I used to be able to clean my cache from settings manage apps filter ETC... but now with 2.2 I cannot , anyone know how ?
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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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Aug 16, 2012
In cm roms, dalvik cache of system apps are generated in /cache but those data/apps are generated in /data. Is there any way to disable this behaviour? Cache partition in our phones is too small. In AOSP and AOKP and stock roms, dalvik cache is always generated in /data no matter whether its a system app. any way to achieve this in cm roms?
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Jun 21, 2010
I'm implementing an image cache system for caching downloaded image.
My strategy is based upon two-level cache:
Memory-level and disk-level.
My class is very similar to the class used in the droidfu project
My downloaded images are put into an hashmap and the Bitmap objet is wrapped inside a SoftRererence object.
Also every image is saved permanently to the disk.
If a requested image is not found into the Hashmap<String,SoftReference<Bitmap>> it will be searched on the disk, readed, and then pushed back into the hashmap. Otherwise the image will be downloaded from the network.
Since I store the images into the phisical device momery, I have added a check for preserve the device space and stay under a 1M of occupied space:
CODE:.................
This method is called sometime afte a disk writing:
CODE:..............
What I'd like to add is the same check on the HashMap size to prevent it will grow too much. Something like this:
CODE:.....................
My question is:
What could be a right MAX_MEMORY_SIZE value? Also, Is it a good approach? A good answer also could be: "Don't do it! SoftReference is already enough"
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Sep 8, 2010
I 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?
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Jul 24, 2010
i 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.
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May 25, 2010
I 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.
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Feb 13, 2010
What is the best way to manage contacts, can u download your contacts?
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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 3, 2009
I 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...
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Jun 21, 2010
I 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?
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Jul 10, 2010
I 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.
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Jul 7, 2010
I 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.
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Apr 2, 2010
in 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.
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Nov 5, 2010
I'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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Nov 9, 2010
I have a task which I need to run in the background in my Android app. It reads data over the network and populates a database. It can take several minutes to run.
Once it's started, it needs to complete successfully without interruption. (Otherwise I'll end up with a broken half-populated database.) I realise I can never guarantee it will always complete, but I want to make it as hard as possible for the system to kill off this task. For safety I guess I will have it populate a temporary database, and then only swap out the old database for the new one on successful completion of the import.
It's a modal operation; it does not make sense for the user to be interacting with the app while the import is in progress.
My first attempt is using an ASyncTask with a Progress dialog to achieve the modality, but this obviously breaks the "don't interrupt" requirement. I could work around the screen-rotation issue with ASyncTasks, but I don't think that goes far enough.
At the moment I'm not sure if this should be an ASyncTask, a Service, an IntentService, some combination of these, or something else entirely.
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Sep 6, 2013
Coming from iphone/itunes and want to know what is a good music managing app that I can use?
I really like the feature in itunes where it keeps your media organized in folders. I also like how you can delete the song in itunes, sync your phone and the song will be gone.
I really need these features in the music app I select.
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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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Feb 17, 2010
How to get MapView API in android?
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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 16, 2010
I'm a college student, and there's daily specials at bars, salsa dance nights, special meetings, lectures, etc. And all these things happen around me. I don't want to just put them into my calendar and have them flooding it, but I would like some app to hold such things. Anyone know what I can use that isn't my default so I can retain my personal schedule and, if I want to do extra, can see this app's contents?
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May 9, 2010
I have an android 2.1 (Samsung I5700 Spica). Does android use only "google contact" for manage all contacts? Even when I manually add contact on the top it says "Google contact from MyEmailId@gmail.com". The reason for asking is if you select "Menu">"Display Options">select "MyEmailId@gmail.com" you can select "System Group" How do I add certain contact to one of these groups, by default if I manually create a contact it goes and sits in "System Group: My Contacts". Is there an option where one can add contact not get stored under google contact?
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Aug 12, 2010
Is there an app (or even a setting on the Desire itself) that can keep a track of the outgoing calls duration and total on my phone? I've recently dropped from 600 to 300 minutes and want to make sure I don't go over my allocation in the same way the "3G" app tracks my Internet usage!
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Mar 19, 2010
I know how to create and apply styles and themes thanks to http://developer.android.com/guide/topics/ui/themes.html. However, this method only works for our own activity or application. I'd like to create themes that could dress the whole system (i.e. all activities). Of course, I'd like to select one of these theme by programing. If I could customize the status bar as well, it would be perfect. I didn't find out documentation about that.
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Sep 26, 2010
So I just got a credit card and need to monitor my spending on it, is there an app where I can do this?
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Nov 8, 2009
In the process of creating an AppWidget which displays data from a remote host, I am looking for documentation about how to manage updates. Are there articles somewhere about how and when querrying remote data is the most appropriate? I am wondering if we have to explicitly code the remote queries in a separate thread, or even do it in a separate service, to avoid freezes of the home screen (this happens a lot on my htc magic).
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