I need to store a queue into a DB. I need to be able to insert at the head, and append at the tail. I also need to remove items from the head.
Each item is just a string. I need to maintain a todo list -- high priority items are added to the beginning of the queue. and low priority items are append to the end.
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I am trying to adapt my application from a confirmation model to an undo model. For those of you who don't know, this is where you can delete something with one click but if it was a mistake you can undo it just as easily, as opposed to interrupting the user every time he/she wants to do something to ask the annoying "Are you sure you want to...?" question via dialog.
My app is backed by the Android SQLite DB and I want to be able to undo a limited set of delete and update operations. Also, I only need to be able to undo one sequential change and the information does not have to stick arround for very long.
Everything I read on undo/redo says to use a command model to store the data. My question is how can I store the database changes in a lightweight restorable way?
I am trying to create an application which collects a lot of notes from users. I want to implement full text search on the notes so that the user can get relevant notes from the whole array of notes.
I am looking for a solution for this. Full-text-search(FTS) is actually supported by SQLite, but is it available for Android? Can anybody enlighten me on this?
When using torrent-fu, does the computer (doing the downloading) have to be on? Or can I just use torrent-fu to find torrents when I'm at work, queue them up, and when I get home turn the computer on and it'll start the downloads?
View 1 Replies View RelatedI am queuing up a bunch of runnables into a thread via a Handler.post(). I would like the ability to send a note to that thread that it should pause. By pause I mean, finish the runnable or message you are currently working on, but don't go to the next message or runnable in your message queue until I tell you to continue.
View 2 Replies View RelatedHow can I keep Toast from building up a queue of messages?
I'm working on a board game and I'm sending status messages back to the user with this wrapper function I created for Toast:
CODE:...........
The problem is I've made the flow of game play so simple I can now play it so fast Toast messages queue up, even to the point where they continue to show on the desktop after I quit out of the game. t.cancel() doesn't seem to cancel out the previous message, anyone know what I might be doing wrong?
Is it possible, with an IntentService, to send another intent to the IntentService from within the IntentService? For example, say my IntentService is processing an Intent which has it write a bunch of data to the database. During this time, several other Intents to write other data may [or may not] have been queued up in the IntentService. Suppose, after processing that Intent by writing the data to the application's database, I want to queue up another Intent to send that data via web service to "the cloud." Perhaps I want to queue this processing in another Intent because sending to the cloud is secondary. Is it possible? Would it cause any problems if the Intent being processed is the only Intent in the queue at the time the IntentService is trying to queue another Intent?
View 2 Replies View RelatedHow can I tell what has and has not bee downloaded? I see options to add to my download queue subscribe...but no option to see what's in the queue or manage what's been downloaded.
View 1 Replies View RelatedI read somewhere (and have observed) that starting threads is slow. I always assumed that AsyncTask created and reused a single thread because it required being started inside the UI thread.The following (anonymized) code is called from a ListAdapter's getView method to load images asynchronously. It works well until the user moves the list quickly, and then it becomes "janky".final File imageFile = new File(getCacheDir().getPath() + "/img/" + p.image);image.setVisibility(View.GONE);view.findViewById(R.id.imageLoading).setVisibility(View.VISIBLE);
(new AsyncTask<Void, Void, Bitmap>() {
@Override
protected Bitmap doInBackground(Void... params) {
try {Bitmap image;
if (!imageFile.exists() || imageFile.length() == 0) {
image = BitmapFactory.decodeStream(new URL(
"http://example.com/images/"
+ p.image).openStream());
image.compress(Bitmap.CompressFormat.JPEG, 85,
new FileOutputStream(imageFile));
image.recycle();
}image = BitmapFactory.decodeFile(imageFile.getPath(),
bitmapOptions);
return image;
} catch (MalformedURLException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
return null;
} catch (IOException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
return null;
@Override
protected void onPostExecute(Bitmap image) {
if (view.getTag() != p) // The view was recycled.
return;
view.findViewById(R.id.imageLoading).setVisibility(
View.GONE);
view.findViewById(R.id.image)
.setVisibility(View.VISIBLE);
((ImageView) view.findViewById(R.id.image))
.setImageBitmap(image);
}}).execute();I'm thinking that a queue-based method would work better, but I'm wondering if there is one or if I should attempt to create my own implementation.
I'm writing unit tests for a ListActivity in Android that uses a handler to update a ListAdapter. While my activity works in the Android emulator, running the same code in a unit test doesn't update my adapter: calls to sendEmptyMessage do not call handleMessage in my activity's Handler. How do I get my ActivityUnitTestCase to sync with the MessageQueue thread and call my Handler?
View 2 Replies View RelatedI decided to start pipelining input to increase responsiveness in my games. Basically what I do is when the activity receives a Key or Motion event, it sends it to a feed method in the game, which encapsulates it with a time and whatever else I need and puts it in a queue then immediately returns so the UI loop is never held up waiting for long. The main loop later processes the queue, applying the events in it at the appropriate times.
This works great and makes the games snappy, although now I'm starting to miss touch events intermittently. I realized that the events could be recycled objects and that could make them not safe to queue. Is this the case or is it safe to queue them for deferred processing like I'm doing?
I was curious about the nature of the handleMessage() and sendMessage() behavior of the Handler class. I want to be able to send message to another thread in such a way that the destination thread can process the message queue when it wants to. It seems, however, that the message is processed by handleMessage() practically as soon as it's sent.
I'm trying to design a game loop thread that does something like this:
CODE:.....
However, I as soon as sendMessage() is called (from the parent/calling thread), the Handler.handleMessage() is processed (in the child/receiving thread), even if the child/receiving thread is blocking in a while loop.
I've seen this problem solved in other games by using a thread-safe list (ConcurrentLinkedQueue). The UI thread just posts events to this queue, and the game loop can remove the events as it seems fit. I just assumed the Handler class was designed for this purpose. It seems it's more intended for asynchronous callbacks to the parent thread.
I am trying to connect to a MSMQ from an Android phone. The problem is that all the libraries that I seem to find have to run in Windows since they appear to just be wrappers around C libraries ("DLL"). I found J-Integra but it seems like a very messy non-open source solution. Anybody has any ideas? And does anybody know of a server in linux to host queues that I can install for testing?
View 2 Replies View RelatedI am seeing the exception in 'adb logcat'.But I don't know if it is caused by my application or android platform.Can you please give me any idea how to troubleshoot this exception?
View 3 Replies View RelatedHow to implement tabs in Android. I am having a context. In that I want 3 tabs named Free,TOP,Paid.Clicking on each of the tab should open separate activity.
View 3 Replies View RelatedI'd like to implement drill down view in Android. Currently, onListItemClick, I refill the same list view with different data. any other suggestions? Something like the way it is done using UITableView on iPhone? is it possible to animate (push left or right) the listview fill operation?
View 4 Replies View RelatedI have a widget that periodically updates itself (hourly) to display top result of search query. I would like to extend it so it captures several top results and then loops through these. The best example would be Genie News and Weather widget for which I was unable to find a source code. What would be a good way to implement the animation? I'm thinking ViewAnimator + timer, but is there maybe a better way, say FrameLayout + alerts? I'm already using AlertManager to periodically pull search results for the widget How bad such arraignment would affect phone's battery life?
View 1 Replies View RelatedIs there any available guide to implement TLS for Android applications?
View 2 Replies View RelatedI am porting GPS to Android now. I have been look for many web site relate to Android GPS porting include this group. However, I also feel confused about that. I have some questions. Can anyone give me some suggestions and I will appreciate about that. 1.There are 3 files : Android.mk, gps.cpp and gps_qemu.c in hardware/ libhardware_legacy/gps. What is the functionality about the 3 files in directory gps. Should I modify the 3 files to implement GPS. In this web site http://www.netmite.com/android/mydroid/cupcake/development/pdk/docs/g..., it shows that anyone that want to integate GPS with Android should create a shared library named libgps.so refer to gps.h. My question is how to create a shared library libgps.so.If the libgps.so is created, where can I find it. What is the relation between libgps.so and libhardware_legacy.so. 3.How to test GPS if gps is implemented successfully. I know there is a gpstest tool in Android but I don't know how to use it. Can someone tell me the detail about gpstest tool provided by Android.
View 5 Replies View RelatedSay I want to define that an URI such as: myapp://path/to/what/i/want?d=This%20is%20a%20test must be handled by my own application, or service. Notice that the schema is "myapp" and not "http", or "ftp". That is precisely what I intend: to define my own URI schema globally for the Android OS. Is this possible? This is somewhat analogous to what some programs already do on, e.g., Windows systems, such as Skype (skype://) or any torrent downloader program (torrent://).
View 2 Replies View RelatedIm having problems with implementing the double tap. Well i implemented the ongestureListener and i had the gesturedetector, but im not sure wheres the problem here is my code...
View 1 Replies View RelatedLet's say I randomly generate a number 0 to 100. Where 0 is really cold and 100 is red hot. Wen the number hits, it would show an image bar (kind of like a % finished bar) that shows in the image what # you hit.
So it would kind of be like a progress bar from 0 to 100, and whatever # they hit it shows in the image of the bar in an imageview?
I've got 2 classes GLLayer and GLCamTest. I'm attempting to run a method located in GLCamTest...
CODE:..........
I'm looking to run in on a thread from GLLayer but from what I understand I need a Handler..
CODE:.........
I'm starting the Thread from within public void onDrawFrame(GL10 gl) { my question is how would I implement said handler? I've read http://developer.android.com/reference/android/os/Handler.html but I still don't really understand how I'd implement it.
I would like to implement a new LocationProvider. In this case, one that uses OpenCellID.org. I figured the pattern wou be quite similar to providing an AccountAuthenticator but was stunned that I could not find any documentation on this.
Looking at the source http://www.netmite.com/android/mydroid/frameworks/base/location/java/... all the relevant code seems to be in a service providing the ILocationManager.aidl -interface that I cannot navigate to or find using Goole Code Search.
Is it supported to provide your own LocationProvider at all? If so, what do I have to do to acomplish this?
I would like to implement a ticker in my application but, I cant find Ticker in Android SDK 1.0. I tried marquee in latest release but it work only on focus.
View 2 Replies View RelatedI have question about implement OTA service on Android phone when i use dev phone, it will auto update to cupcake so OTA is a service that operator provide to update ? and it means OTA could change the system.img ? if i want to build an OTA service, what should i start to read ? i need to know how to replace system.img and how to backup userdata ?
View 2 Replies View RelatedI'm brand new to android and developing in general. I'm using android's SDK with eclipse Galileo. I've followed several tutorials to create different layouts. I've even learned recently how to use radio buttons and verify which ones were selected. Now I need to create a service that downloads and updates an xml file within the application. I've tried to locate a simple tutorial for services on Google's developer site but so far, so bad. If they exist could somebody point me in the right direction?
On the other hand, I've been told Google's tutorials are a little out dated. Is that true? If so, are there any other tutorials that would hand-hold (and possibly over-explain) how to use a service to a true newbie for free (like google)?
I have been trying to implement a horizontalScrollView. Here is my sample code....
View 1 Replies View RelatedI have tried to implement HTML5 in Android OS. But i didnt get it....Can anyone give example HTML 5 in Android?
View 2 Replies View RelatedI would like to give users a choice of starting one of three different activities by choosing from three mutually choices. And I would like to provide users these choices as Preferences. If I use CheckboxPreference, user can select more than choices. Something like "RadioGroupPreference" would be good but it is not available from SDK. Can mutually exclusive preferences be implemented? Pointers or suggestions are greater appreciated.
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