Android :: Storage Of Static Data Within App

Jul 28, 2010

I am currently developing a simple info app on various uni campuses. I want the app to operate predominantly in an offline state thus I want to store all my information locally. The data within the app will not be subject to any change thus I was wondering what the best (practice) method was to store such data? Basically should I be storing the info in a SQLite db, java file or xml?

Android :: Storage of Static data within app


Replace Single Row View In Custom STATIC ListView - STATIC Data

Mar 18, 2013

I have Eclipse Juno and I'm working on an app with that.

The main activity will have a scrollable menu that takes you to all the other activities.

So the general structure/outline right now:[HIGH]Relative Layout ImageView (header logo type thing) ListView (the actual scrollable menu)[/HIGH]Here's the problem though... I can't find any simple list tutorials. I can easily make a single line list work but I need to make a two line list and one that is static, not dynamic and no examples are out there for that. It's like if you want to make a 2 line list, you can only learn how to do it in the most code-heavy ridiculous way possible.

Essentially what I am looking for with the list is this: Item one: Centred, bold, non selectable title (Resources)

- Item two-??: two line list items, click-able to a new activity, title of the section on first line, description on the second line.

- Item ??: Centred, bold, non selectable title (Tools)

- Item ??-??: two line list items, click-able to a new activity, title of the section on first line, description on the second line.

Nothing dynamic that is ever going to change, no super complex wonkey calculations, just to simply have the data set in stone (preferably via XML) and to call it into the list.

I experimented with some of the other list views and no matter what I did, I could get, via editing the resources and NOT using Java, more that one item on a single line but it wouldn't format it properly according to the layout I guess because I haven't got the ID correct or whatever I don't know.

I mean, all the examples I've seen for a 2 line list are extraordinarily over-coded and just bloated. I mean I have a website I am still working on in C#/ASP.net that has far more complex things in it with half the code that I've seen for the examples of the two line lists.

I tried on my own to figure it out (I am decent with C# and vaguely familiar with Java, self taught, and programming for some other systems like Python, again all self-taught), but like ALL coding references, they're organised by the actual code you implement (that you don't know) instead of by what you want it to do (so you have to search the whole code base to find something that you don't know what it's called but know what it does). >:C

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Android :: App Static Storage ?

Sep 30, 2010

I am creating an Android application which will have some embedded music inside of it ( ~ 80 MB ). I was planning on putting it in the res/raw folder.

Since android stores that all in it's internal memory, is this way too large? What are my options? I have come up with the following:

Copy resources out of internal storage and onto the SD card when application first starts. Afterwards remove from internal storage (is this possible?)
Download music from the web when the application first starts.

I would really prefer not to have to go with option 2 since I want the app to be entirely offline and the static music is not going to change (except between releases).

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Android :: Put Static Data Into SQLite Database?

Jun 8, 2010

If I have a bunch of data that is never going to change (eg. an English language dictionary or the rgb values of a couple hundred color names), how do I use an SQLite database to store it? I know a database is faster than loading everything into memory when the app starts, but how do I make the database either the first time the app runs or "before" the apps ever runs?

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Android :: High Performance Access On Static Data

Nov 24, 2009

I am writing a program where I have to access some static data, and now I am looking for the best method of how to include them into the project.Reading in the data by parsing an XML is *slow* (even using the SAX parser). 2. Reading the data by parsing a CSV file is faster than loading an XML, but again is too slow. 3. Putting the data into a Java file directly (e.g. by defining an array) fails because Dalvik says it is too large. 4. Reading in the data using serialization is slow. The funny thing here is: It takes a bit longer than loading the XML file. 5. Reading in the data from a SQLite database is the fastest method until now. But a bad workaround is needed: A SQLite DB can not yet be read directly from the resources, but instead has to be copied to the cache or to the SD card - even for read-only access. Right now I am using method 5, but I would really like to use a more simplified and faster solution.

What I found out: Unserialization in Java is *fast* (reading a HashMap with 5000 integers and strings in 79ms on my PC), while the same action on my G1 takes over 13500ms. I know that I can not compare a PC to a mobile device. But still, there seems to be a big difference here. I think that the JRE directly copies the serialized data to RAM, while Dalvik seems to read every object step by step. Is this going to change in the future? And, most interestingly: what do you do to access lots of static information?

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Android :: AutoCompleteTextView Static Data / Slow Performance

Jun 1, 2010

I am facing the following problem: I have a big list of street names(~2000 entries), which is stored as a variable. I have an AutoCompleteTextView which should complete the names. The process takes really long time(approx. 2 - 3 seconds) to complete the suggestion. Is there any way to speed this up? I am pasting my code, if this is necessary:The getStreetsData() method simply returns the static list of the names.

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Android :: Static Data Structures On Embedded Devices

May 2, 2010

I've started working on some Android applications and have a question regarding how people normally deal with situations where you have a static data set and have an application where that data is needed in memory as one of the standard java collections or as an array.

In my current specific issue i have a spreadsheet with some pre-calculated data. It consists of ~100 rows and 3 columns. 1 Column is a string, 1 column is a float, 1 column is an integer. I need access to this data as an array in java.

It seems like i could:

1) Encode in XML - This would be cpu intensive to decode in my experience.

2) build into SQLite database - seems like a lot of overhead for static access to data i only need array style access to in ram.

3) Build into binary blob and read in. (never done this in java, i miss void *)

4) Build a python script to take the CSV version of my data and spit out a java function that adds the values to my desired structure with hard coded values.

5) Store a string array via androids resource mechanism and compute the other 2 columns on application load. In my case the computation would require a lot of calls to Math.log, Math.pow and Math.floor which i'd rather not have to do for load time and battery usage reasons.

I mostly work in low power embedded applications in C and as such #4 is what i'm used to doing in these situations.

It just seems like it should be far easier to gain access to static data structures in java/android.

Perhaps I'm just being too battery usage conscious and in my single case i imagine the answer is that it doesn't matter much, but if every application took that stance it could begin to matter.

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Android :: BroadcastReceiver For Data SMS - Static Works - Dynamic Does Not

Mar 29, 2009

I have created a broadcast receiver statically by specifying it within the Manifest, and I have also created the "same" broadcast receiver in code and have registered it with the application context. The static way works very well, but the dynamic way does not receive the expected broadcast. It could be that I am not creating the intent filter correctly, or that I need to register it with some other context somewhere. Please see the code examples to see what I am doing. This is related to receiving data SMS, it works very well on a device using a broadcast receiver defined in the Manifest. The correct permissions are set for both examples.

The following is from the Manifest, and the resulting receiver gets the expected broadcasts:

CODE:.....

The following is the code example that doesn't work (it does work with an intent like "android.provider.Telephony.SMS_RECEIVED" but not for data sms):

CODE:.....

The question is - why does this broadcast receiver get notified of the incoming data messages? It seems some other resource is notified when the Manifest version of the receiver is created...

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Android :: Call Non Static Method In Static SQLiteDatabase Class

Mar 30, 2010

i want to display a msg to the user (msg box or Toast) when exception happend in a static SQLite Database class that i use. the problem is that i cant call a non static method in a static class , how can i handle this. this is the class

private static SQLiteDatabase getDatabase(Context aContext) {

and i want to add something like this in the class when exception happen but context generates the problem of reference to non static in static class.

Context context = getApplicationContext();
CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();

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Android :: Cannot Make Static Reference To Anon-static Method

Feb 7, 2010

I'm having some issues with the old "Cannot make a static reference to a non-static method" error in my Android program. I am creating a sand falling game (similar to the Powder Game) and I created a class called Control to create a Control Bar at the bottom of the screen with a slider for brush size (that works fine) and a button to pop up a Dialog to allow users to pick the selected element. However, when I call DemoActivity.showDialog(2) from my code, it gives the static reference to non-static error (DemoActivity is the main activity of my application). I also tried changing it to just Activity.showDialog(2), but I got exactly the same error!

Here's my code:

CODE:................

I fixed it by adding the following to my Control.java code:

CODE:..........

And then calling control.setActivity(this); from my onResume section of DemoActivity.java!

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Android :: Non-static Method Cannot Be Referenced From A Static Context

May 26, 2010

I am modifying the source code here: http://thinkandroid.wordpress.com/2009/12/30/getting-response-body-of-httpresponse/

I get this error:

code:.............

This error is line 13 on the second box.

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Android :: Cannot Playback Video From Internal Storage - Data-data-com.myapp-some-folders-video.mp4

Aug 4, 2010

I have an application with a lot of media data (images and videos) that were previously stored on the sdcard. With that, images and videos are displayed fine in my app.

Now, in order to secure the content more, I wanted to move the content to the internal storage / data dir of the app, which I did. I copied all media with a routine within my app to the data folder (/data/data/com.myapp/some/folders/video.mp4) and adjusted the path in my app so that it would look for the media in the internal storage data directory and not the sdcard anymore.

Everything works fine, images are being displayed (decoded) properly, but videos don't play. They files do exist though - I do not get a FileNotFound exception. But an IOException: java.io.IOException: Prepare failed.: status=0xFFFFFFFC

Why is that? Everything is handled within my one app and the videos have been copied with the same routine as the images, thus having the same permission settings. Looking at the stack trace, it all runs in process id 18060).

Why I cannot playback the video from internal storage? Or how can I?

CODE:......................

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Android :: Creating Static Data Structure On Application Startup For Android

Oct 27, 2010

In my application, I am going to create a few listviews that are dependent on the listview before it. For example,Then, depending on user choice, will go next screen, let's say, it contains a submenu of each type of school,that may be different or may be the same to other states.What I want to know, is how to populate these different lists dynamically as the user goes on? I don't know what the best of doing this is, and I seem to be looking in the all the wrong places because I keep getting stuck. Once all the data is added into whatever structure is used, it will be static. I basically just need help as to how to code information into some sort of hashtable or anything of the sort that can be easily referenced, and later when the Application is updated, be able to add more schools/states/submenus etc.

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Android :: How To Get Personal Data Storage App?

Jan 5, 2010

Does anyone have a bead on a well-performing, well-design app that I can store personal data/info with in a secure fashion? Specifically, I want to store information such as my kid's Kaiser ID numbers, doctor's names, etc... but it has to be secure. Poking around in the Market hasn't really turned up any great options for me so I thought I'd turn to the community for suggestions.

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Android :: Is It Efficient To Use Text File Or XML File To Store Static Data

Jul 31, 2009

I have some reference data in a text file (~5MB) that I want to use with might android application.The file is of the format:
1|a|This is line 1a
1|b|This is line 1b
2|a|This is line 2a
2|b|This is line 2b
2|c|This is line 2c

What I want to know is the most efficient way (less memory, fast, size etc.) to use this file within my application.

a.) Should I save the file as a raw resource and open and read the whole file whenever I need a certain line.
b.) Should I convert the file to XML and use XPath to query the file when ever I need to look up a value
<!--sample XML -->
<data>
<line number="1">
<entry name="a">This is line 1 a</entry>
</line>
</data>
c.) Should I just copy & paste the whole file as a static string array in the application and use that.
[EDIT] I will also need to search this file and jump to arbitrary keywords e.g. "line 1a".

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Android :: Static Vs Non-static Inner Classes

Mar 9, 2009

I have been finding it convenient to extend Handler in many of my activities to handle messages specific to the activity. The handler sublass is an inner class of the activity and needs to access its state. I am wondering if there is any performance difference between making the handler subclass static and passing in the activity explicitly in its constructor or making the subclass an "instance class" and letting the vm worry about my accessing members of the containing activity.

The static approach:

CODE:.............................

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Android :: Internal Data Storage And WakeLock

Oct 18, 2010

I have a service that needs to write some data to the internal storage using RandomAccessFile. Do I need to use a WakeLock to make sure the data won't get corrupted if the service process gets killed?

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Android :: Data Storage / File Vs SQLite

Nov 26, 2009

I am developing an application that periodically sends information to an external server.I make a local copy of the data being sent, for backup purposes.What is the best option to store the data in terms of saving battery life? Each data submission is a serialized object (the class has 5 fields, including a date, numbers and strings) of about 5K-10K.Any other idea?

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Android :: Application Data - Internal Or External Storage

Oct 3, 2010

I have a question about where people expect me to store my application data. I have an application where the user will enter information via the keypad, and download information (including images) from a website. Where is the proper place to save this? Internal or External Storage?

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Android :: Copy Raw Data From Internal Phone Storage

Aug 31, 2009

I tried to copy my wiped data from my phone, so i have to read raw data with dd command. I have root and BusyBox v1.14.2 installed, but when i type: dd if=/dev/block/mtdblock5 of=/sdcard/testfile or even just dd if=/dev/block/mtdblock5 I get: dd: /dev/block/mtdblock5: Input/output error Why can't I copy the data?

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Android :: Display Data In Internal Storage And Device Memory

Jun 25, 2010

How to read and display the data stored in the Internal Storage-private data on the device memory.

String input=(inputBox.getText().toString());
String FILENAME = "hello_file"; //this is my file name
FileOutputStream fos; try {
fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos.write(input.getBytes()); //input is got from on click button
fos.close(); } catch (FileNotFoundException e) {
e.printStackTrace(); } catch (IOException e) {
e.printStackTrace();
} try { fos1= openFileInput (FILENAME);
} catch (FileNotFoundException e) {}
outputView.setText(fos1./*I don't know what goes here*/);

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Android :: Ringtones Gone After Clearing Data / Recover Media Storage Without Factory Reinstall?

Jul 23, 2010

After "clear data" for "MEDIA STORAGE" application(i wanted to reset the library for Music)
I have now only one ringtone.
Im sure along with this, other necessary things got deleted.
Is there any way to recover all of Media Storage without doing a factory reinstall?
Motorola Milestone OS 2.1 - update1

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HTC Desire :: Cleared Data From Media Storage App

Jul 15, 2010

so the correct music would display in the music app, which worked. But it also removed ALL standard tones, ie ringtones, notifications and alarm tones... Is there anyway I can get them back without factory resetting, ie download them from somewhere??

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General :: Calendar Storage - Data Usage?

Nov 8, 2011

I am from the UK and have just got an HTC Android phone.I have a data usage limit of 500 MB per month on my ty UK network.

I got the My Data Manager app to track my data use and at the top every time (of mobile data not wifi obviously) is 'Calendar Storage'. It uses up stupid amounts of data every day.

I have gone through all my accounts that are synced to my device (facebook,gmail,GMX,linkedin etc) and I have disabled the calendar sync for all of them that have the option available. Yet it still shows as using data every day on calendar storage.

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Android : ContentProvider Storage/memory - Data Can Be Stored In File System - In An SQLite Database

Oct 20, 2010

Please direct me to a description of the techniques that the ContentProvider employs to access data. I am trying to understand how it works as well as what is tunable or even if its meant to be tunable. It the memory management tiered, cached, virtual, flat? Is it file based, shmem based, stream based? Can there be a combination thereof?

Any information, suggestions, or references are welcome. The android fundamentals page says: "The data can be stored in the file system, in an SQLite database, or in any other manner that makes sense;" but the android ContenProvider page barely skins the onion.

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General :: Deleting Data In Internal Storage Space?

Mar 12, 2012

how can i delete data stored in the internal storage , i am using HTC wildfire cm7

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General :: System Data Taking Up All Internal Storage

Nov 30, 2011

I have a UnRooted Desire HD running 2.3.3, and recently I got the "Low on Space" icon. Upon checking my apps and there size I only have 240ish MB of apps. So I deleted some apps and got 144MB of free space. Then over night my phone went from 144MB down to 8MB of free space (phone was on the charger and wasn't touched all night).

I did download an app called DiskUsage and it shows a very detailed view of whats taking up what space on either the SD or internal storage, and is showing me that my System Data is using 885MB of internal storage space. A friend has the same phone and he got the same app to compare and he only has 90MB of system data. I Hard Reset the phone and hope it doesn't come back, but I would like to know how to correct this issue if it was to happen again.

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HTC Droid Eris :: How To Move Data From Internal Storage To SD Card?

May 14, 2010

My wife has a completely stock 1.5 Eris. She's getting a low storage notification. I looked at the system setting and her internal storage is completely maxed out, but the SD card is 90% available. I've mounted her phone to my laptop and tried moving files around, but nothing is moving. She only has pictures on her phone, not a single song, movie, video, etc. How do I get the data moved to the SD card?

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HTC EVO 4G :: Clear Data In Contact Storage Delete Phone Entries Only?

Aug 3, 2010

If I clear the data in the "Contacts Storage" tab of "Manage Applications" will this only delete the data stored on the phone itself or will it also delete the contact on the exchange server as well? I have some contacts that are duplicates because they were put in the phone before I was able to get the exchange sync set up resulting in an entry for exchange and an entry for phone when in the "People" area.

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General :: Samsung Galaxy Discover - Data Storage And Transfer

Feb 21, 2014

I have a Samsung Galaxy Discover. I want to be able to put my game apps, music, and photos on my SD card. I also want to have the game apps, music, and photos on my laptop without having to move the SD card around. I have changed the storage location when I take pictures to the SD card. I want to be able to put pictures I receive in text messages on there as well. I have tried manage apps, I have tried connecting my device through USB to my laptop and manually copying the files to the SD card. Are these goals possible? How can I accomplish them?

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