I will be developing a dictionary app for both Android and iPhone. The data will be embedded within the app, and it consists out of approximately 100000 words, with genus and plural form. Is it better to use a SQLite database or can I just stick to XML? Somehow SQLite sounds more efficient, but I thought let's just ask.
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Say I want to make an app with certain tutorials...A lot of em..
I've classified them and made lists (like several buttons)...leading to the activity displaying the corresponding tutorials.
Now since most of them are going to be mostly text , What is the best way to implement it ?
I want it to be scrollable ...and zoomable and simply Display all the steps of the tutorial vertically on one page (like we see in MS word- neat.)
What's the best option I can use for this ?
I am reading the following URL to test a RSS parser. http://newsrss.bbc.co.uk/rss/newsonline_uk_edition/uk/rss.xm
When using the same code on a Android HTC phone the whole resource cannot be read. There are no exceptions being thrown. I am guessing the rss.xml is too large to be read in? I use a sax parser after the block of code which complains. Code...
I need to insert approximately one million rows of data (spread over 4 tables) - each row has one or two numeric fields, and two or three text fields (normally quite short). Single-column indexes on all the fields. After doing some tests on the emulator with a small test set, I extrapolated (assuming the last row will be inserted with a similar speed to the first row) my results to figure out that this would take about 15 hours (I have a Core 2 Duo running Vista). However, then I tried running the small test set on my Hero and I was surprised to see it run more than four times faster. I would guess it would take about 3 hours on the Hero. Alternatively, I could make the pre-populated database available as a download on the first run but this is likely to be a 120MB download. I have a few questions I'm hoping someone can help me with: 1. SQLite performance on the actual device being 4-5 times faster compared to the emulator - is this normal/expected? 2. Do the figures above generally sound fast/slow/normal (sorry this is so vague)? 3. From a user perspective - would it be best to provide a 120MB download or a 3 hour "first-time initialisation" step (plus 6MB download)?
View 14 Replies View RelatedI will be making a mobile application in Android. My application is like Google Map's Get Direction feature, but a lot more complex, so I need to store data about points in the map. So I'm worried that SQLite may not be able to handle these large amount of data(or considering the limited storage of the phone). I have no background in SQLite so please bear with me.
View 3 Replies View RelatedI have a large(ish) database - around 30MB, created offline with 400,000 rows. Doing a simple select (name LIKE pattern%) and then showing the query in a listview takes about 10 seconds. I tried indexing that field but no difference. If this is normal I will just use a raw data file and do a binary search myself. If this is not normal I hope someone has a hint or two to what might be wrong.
View 15 Replies View RelatedI guess many people already read this article:
Using your own SQLite database in Android applications: http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/comment-page-2/#comment-12368
However it's keep bringing IOException at
CODE:.............
I'am trying to use a large DB file. It's as big as >8MB. I built it using sqlite3 in Mac OS X, inserted UTF-8 encoded strings (for I am using Korean), added android_meta table with ko_KR as locale, as instructed above.
However, When I debug, it keeps showing IOException at
CODE:..............
I suspect it's caused by trying to read a big file. If not, I have no clue why.
I tested the same code using much smaller text file, and it worked fine.
Can anyone help me out on this? I've searched many places, but no place gave me the clear answer, or good solution. Good meaning efficient or easy.
I will try use BufferedInput(Output)Stream, but if the simpler one cannot work, I don't think this will work either.
Can anyone explain the fundamental limits in file input/output in Android, and the right way around it, possibly?
WITH MORE DETAIL:
CODE:...............
Im currently developing a system where the user will end up having large arrays( using android). However the JVM memory is at risk of running out, so in order to prevent this I was thinking of creating a temporary database and store the data in there. However, one of the concerns that comes to me is the SDcard limited by read and write. Also another problem that comes to mind is the overhead of such an operation. Can anyone clear up my concerns, as well as also suggest a possibly good alternative to handling large arrays ( in the end these arrays will be uploaded to a website by writing a csv file and uploading it).
View 1 Replies View RelatedI have an Android app that has both CursorAdapter based ListViews (backed by sqlite) as well as custom BaseAdapter based ListViews which are built on the fly from JSON pulled down from a server.
The data displayed in both is identical - an image and a couple of TextViews. My Cursor-based ListView has 3000 rows, the JSON-based ListView has about 30. However, scrolling down the list is significantly faster for the Cursor-based adapter. For the JSON-based lists, the data is all fetched before the rows are made visible. Images for both types of lists are downloaded on-demand.
I have both ListViews configured identically - both with fastScrollEnabled, scrollingCache and smoothScrollbar set to true.
I'm looking for leads on how to go about trying to figure out what's going on here and to potentially fix it so that the JSON-based ListViews as as fast as the Cursor-based ones.
I want make it support multiple screens(small,normal and large).I am 100% sure the all of layouts are working perfectly now, but large screen,the problem is that all XML files of layouts in layout-large can't load,The platform always load default XML file(these are under layout folder) at large screen environment.
View 4 Replies View RelatedI've just got myself a Desire since last week and I am really really happy with it. It's my first android phone (previously had a Nokia N95) so I am still trying to get my head around it.
I've just realised that the phone is using massive quantities of data over the last two or three days. I have installed an app to show me how much and it is saying over 4gb, a lot of it during the night when I have not being using the phone.
I have obviously been using the phone a lot since I got it but nothing close to that amount. The most data hungry app that I can think of that I have used is Grooveshark and that was only for about 20 minutes. Also I have gone into all the apps I can think of and made sure that they are either set for manual sync or else no more than once a day. Is there a way for me to tell which app or widget or whatever is using all of this data? I am sure I have forgot to change the settings on something but I cannot figure out what it could be.
For 4 of my albums all the songs and the albums names come up as random amounts of ?s. i dont know how to fix it, i tried re-downloading them, and taking out some characters from the names but nothing will fix it. so is there any way to fix this or what is the cause. and is there any way to change name of songs and albums on the phone by just using the phone.
View 4 Replies View RelatedI have an app that only requires the value of a textview field to be saved... what would be the most simple and efficient way to save such a small amount of data? Creating a database for this seems like overkill. would onSaveInstanceState be sufficient?
View 4 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 RelatedI am trying to see if user applications can READ the framebuffer e.g. / dev/graphics/fb0. I find that there is a permissions flag "android.permission.READ_FRAME_BUFFER", but there is no API, which can be used to grab the frame buffer.Is there a plan to provide an API for reading the frame buffer in future android releases?
View 3 Replies View RelatedSay I'm on cnn.com and I'm driving and want to hear the text.
Is there an application that will do this?
I use Eclipse for my development. The problem with it is, I find it incredibly memory hungry... it often takes ages to load up, when I save a file it hangs for a while (saying "Building workspace" in the bottom right hand corner), and is just generally slow.I wondered if anyone had any tips for streamlining it for Android. I don't use it for anything else (if necessary, I will install a separate instance for general Java stuff) so I can't help thinking there are lots of modules and stuff I could get rid of which may help it run more smoothly.
View 14 Replies View RelatedBuddy of mine rooted his EVO 4G and added tethering app. He showed me how I could connect my Samsung Captivate to his EVO via Wifi and surf using his cell (3G) connection. To my knowledge, he was connected using only 3G (no 4G signal there). However, page loads were MUCH faster on my phone when tethered to his phone than when I use my own AT&T 3G connection.
View 2 Replies View Relatedis there any OS that i can install on Android that is faster than Android? i mean more smooth and better performance, how is firefox OS and ubuntu touch compared to Android in performance?
View 3 Replies View Related1. Compose a new message in GMail. (If you are still without a GMail account, request a GMail Invitation code)
2. Attach any PDF or Word document that you want to convert to HTML You can attach multiple files in this step by clicking Attach another File.
3. Enter your own email address in the To: box and click send.
4. You instantly receive a message in your GMail Inbox folder. Open the message and automatically it will view your PDF attachment as HTML.
5. The contents of your attachment appear as HTML in a new browser window without having to download the file. When you're finished reading the attached file, close the new browser window to return to Gmail.
If i have a apk file and want to know the package name and class hierarchy, how do i do it?
Suppose I have some sample APK file named "SampApp.apk" which contains classes inside "com.android.sampApp".
Is there any tool in Android SDK which shows the package name when APK file is passed as a parameter.
As the Class files are compressed to dex file I am not able to check the actual package name.
all in my application I want to read data from web page. if data at web page is upto 800kb then I am able to read it succesfully, but if data is larger then I get OutofMemoryException.I think it is because I am using condition as while ((inputLine = in.readLine()) != null) and in phone there is not much memory to read such a long string. I think I must have to read some part of string then write that part into some file in phone and read another part of string and write into phone but I don't know how to do that? Please help me solve this issue.
View 5 Replies View RelatedFrom different post i have concluded that insertion, deletion and updation in Calendar is only possible by using g-data.
View 1 Replies View RelatedI am facing some problem during reading data from socket If there is some null data in socket stream so the DataInputStream would not read the full data and the so at the receiving end there is exception for parsing data.What is the right way to read the data from socket so there is no loss of data at any time ?
View 3 Replies View RelatedI'm coming from BlackBerry to Android and two favorite apps were Viigo and FreeRange with their built-in full article reading support. Is anything available for Android with similar functionality. Opening up a browser to read full articles is so clunky. I'd be willing to pay for one. I've tried some of the existing free Android offerings, but they all open full versions in a browser.
View 7 Replies View RelatedI'm running into a strange problem while reading from an InputStream on the Android platform. I'm not sure if this is an Android specific issue, or something I'm doing wrong in general.
The only thing that is Android specific is this call:
CODE:........
This returns an InputStream for a file from the Android assets. Anyways, here's where I run into the issue:
CODE:........
When the read() executes it throws an IOException. The weird thing is that if I do two sequential single byte reads (or any number of single byte reads), there is no exception. Ie, this works:
CODE:........
Any idea why two sequential single byte reads work but one call to read both at once throws an exception? The InputStream seems fine... is.available() returns over a million bytes (as it should).
Stack trace shows these lines just before the InputStream.read():
CODE:........
Changing the buffer size to a single byte still throws the error. It looks like the exception is only raised when reading into a byte array.
I like to know some application to read out Ebooks and docs I have in SD card. I am very new to android.
View 1 Replies View RelatedI want to use Kindle for my Feedbooks but have run into a problem. Before I actually bought anything from Amazon, I was able to use the Kindle app with my Feedbooks as the folder "kindle" was on my sd card and that's where I stored my Feedbooks. (I had to do a workaround and download the books to my pc and then transfer them to the kindle folder on the sd card because I couldn't download the files directly to my phone -- but it worked).
When I bought my first book from Amazon, however, it caused the Kindle app to force close every time I tried to open it. I called Amazon and they told me to delete the "kindle" folder on the sd card but they didn't tell me how to be able to use the Kindle app to read my feedbooks.
To be able to do some accurate calculations that I want for my app, I need to be able to get an accelerometer reading every 100ms. I haven't found a way to do this on android, it seems like the only way to get accelerometer readings is to put a listener that can listen at different intervals. Basically, is there a way to get a reading at exact intervals?
View 2 Replies View RelatedI have a 16mb binary file and I want to read bytes without using any loop. like if i want to read 16 byte i can pass 16 to some method(if there is any) and it give me my desired result... right now i am using loop for reading bytes but my application is so huge i am afraid that it do not get slow.
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