Android :: Reading Java Serialized Object That Has Been Split Across Two Files?
Mar 2, 2010
I'm writing an Android application. One problem is your app cannot contain a file whose uncompressed size is bigger than about 1Mb. I have a serialized object that I want to load that totals about 2Mb. My plan was to split this file into two smaller files, then load the object by combining both files at runtime.
However, I cannot work out how to use e.g. InputStream and ObjectInputStream to specify that I want to read the data from two input streams. How can I do this?
For example, say my object was split between file O1 and O2. How can I say "Load the object by reading the data from O1 then from O2"?
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Jan 5, 2010
I have tried to create a android application that sends a serialzed object from the phone to a servlet the contents of the object is the input from the user which i will store in a database using hibernate.
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Feb 18, 2009
I am trying to get a FileInputStream object on an image that the user selects from the picture gallery.
This is the android URI returned by android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI content://media/external/images/media/3
When I try to construct a java URI object from this object, I get an IllegalArgumentException with the exception description Expected file scheme in URI: content://media/external/images/media/3 whereas the android URI shows the scheme as content
Never found a solution for the original question. But if you want the byte stream of an image in the pictures gallery, this piece of code will do that.
CODE:...................
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Nov 23, 2010
I just inherited a project at my workplace and I am having trouble having Eclipse act as an Adroid editor rather than a Java editor. Pretty much everything is under lined and I can't seem to find a way to change how it is interpreted. I have downloaded all of the Android SDK's and the Eclipse Plugin. I can create Android projects and write the code just fine, but everything is still underlining. I must be missing something simple. Any suggestions, something I missed or didn't download?
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Jun 16, 2009
I am getting java.lang.ExceptionInInitializerError while reading yml file.The code that i am using for reading yml file is InputStream inputdatfile=Myclass.this.getResources().openRawResource (R.raw.datafile); Map<String, List<Map>> data = (Map<String, List<Map>>)Yaml.load (inputdatfile); I am getting the error in the second line.My yml file is in res aw folder. the external jar file i am using here to read yml file is jyaml1.3.jar. i tried to add <uses-library android:name="org.ho.yml" / > in manifest file that time i am not able to install the app in
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Oct 2, 2010
I am trying to develop application for android . how I can get the defining line of textfile? For instance I have to read 15. line of textfile. how I can do that?
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Jan 9, 2010
I am creating an application which retrieves images from the web. In case the image cannot be retrieved another local image should be used.
While trying to execute the following lines:
CODE:................
The line if(drawable.equals(null)) throws an exception if drawable is null.
Does anyone know how should the value of drawable be checked in order not to throw an exception in case it is null and retrieve the local image (execute drawable = getRandomDrawable())?
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Jun 25, 2010
I'm writing some stuff in java and i ran into some problems lately. cut short, i need to compare an object i created to another instance of this very class i instantiazed before with different data.
looks like this:
CODE:........
with a class a:
CODE:..........
The problem is, that i end up finding out that the values from newA are always equal to those from oldA. so i guess sth went wrong with passing the references of the objects in the last line of the loop...i thought java always passes references of objects unless an explicit copy() is called? if this does matter: this code is running on android - don't know if the dalvik vm messes aroung with this...
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Apr 14, 2009
I have constructed a Bitmap object in Java. Can you please tell me how can I scale it (x, y with a different ratio) on android?
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Aug 27, 2010
I had write one application in that I am reading a image and sending it to the server, I am using Base64OutputStream class. I had tried it in core java and image is encoded successfully, But when I am using same logic in android then I am getting error as java.lang.VerifyError. And Logcat gives following error as............
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Dec 2, 2009
(Code is for Android Actually, I need code to be portable between Android and Java SE.)
I want to have a "settings" class with various game settings, like
public int map_size;
public String server_name;
etc.
The data needs to be accessed fairly frequently (so members, not a key-value map), and from time to time de/serialized in some standard way (mainly to send it through network).
I want to be able to
Serialize and deserialize the object into XML or JSON, without having to explicitly write the code for every member (but still having some degree of control over the format).
Define some (constant) meta-data about every member (default value, GUI name, XML identifier, ...), in a way that allows for easy modification in the source code (I want to be able to add a new meta-property, define a default value for it, and not have to specify it everywhere else).
1 is achievable by using reflection. I thought Java annotations for class members would be perfect for 2:
CODE:.............
But it looks like (user-defined) annotations don't work in Android yet - code using them crashes the compiler...
What would be the easiest way to store the meta-data about the settings (or another way to approach all this)?
Store information about settings in some external XML file? Store it in a Java data structure, with content defined in the code? Defining the data in this way somehow seems very unwieldy, especially compared to keyword arguments of annotations?
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Oct 29, 2010
From my android client i am sending a json to string object.but the .net client is getting it as empty string. here is my code...
is this header format correct?
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Jun 21, 2010
I have created a class with 3 sub classes in Java. The 3 sub classes contain variables to store information from my XML document. I am able to store in the first two for there are only single instances of the data in the XML. The third class contains variables that repeat multiple times. I want to store an object of "third class" objects. I also have a SAX parser class. I am doing this within an Android environment (1.6).
Does this make enough sense without displaying any code?
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Jul 28, 2010
I have 2 String Operations I would need relevant in Object C // Get the newstring from mystring start at counter Java: newstring = mystring.substring(counter) OBJ-C: ? // Get the position from searchstring in mystring Java: startpos = mystring.indexOf(searchstring) ObJ-C: ?
I had two other questions and found now the solution (here als for others)
CODE:.................................
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May 23, 2010
I was wondering what the simplest program for sending an object from my Android phone to my computer wirelessly (via LAN) would be. I have created Java RMI programs with a server and multiple clients, so I have a grasp of the concept. However with android I'm just not sure where to start.
What I am aiming to do is send some sort of information (could simply be text) to my computer and my computer will do an action. I have the GUI interface's and the actions to be carried out all worked out, just the sending of some sort of information is getting me.
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Nov 16, 2008
1. 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.
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Oct 22, 2010
Is it possible to read the database files in Android 2.1 ? For example, files in /data/data/com.android.providers.contacts/databases/ contacts2.db. If yes, how? And is it possible to replace this file programmatically in order to import / export contacts or any other database files?
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Sep 29, 2010
I thought when you passed objects to methods in Java, they were supposed to be by value.
public class MyClass{
int mRows;
int mCols;
Tile mTiles[][]; //Custom class
//Constructor
public MyClass(Tile[][] tiles, int rows, int cols) {..........
At this point, any changes to the mTiles object are reflected back to the tiles object.
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Apr 19, 2010
I'm building an android application, which has a list view, and in the list view, a click listener, containing an onItemClick method. So I have something like this:
public class myList extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
getListView().setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
/* Do something*/
}
}
}
Normally, this works fine. However, many times I find myself needing too preform an application using the outer class as a context. thusfar, I've used: parent.getContext(); to do this, but I would like to know, is that a bad idea? I can't really call: because it's not really a subclass, just an embedded one. So is there any better way, or is that considered cosure? Also, if it is the right way, what should I do if the embedded method doesn't have a parameter to get the outside class?
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Jun 22, 2010
So I ran into a problem today while working on my Android program. I have a class that turns that an XML string into a Java object (third party) and it works fine in as a regular java project but on Android I get this weird error:
CODE:.......
I hide my application name and my package for obvious reasons but I was wondering if anyone has ever encountered problems like this. Class is in the correct package, which is a library I have added. Other classes that I reference before are there and those can be made. Are there any other reasons a ClassNotFound Exception is thrown?
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Sep 29, 2010
Does anyone know any good tutorials for this please? Or could anyone run me through some basic code for making this?
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Aug 25, 2010
In my Android client I want to receive JSON objects from a server. By googling I found a lot of different possibilities how to best parse the InputStream from the Server, but most of them wrote their own parser. Isn't there a library which does this parsing for me? Or how should I best implement it by myself?
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Nov 3, 2010
I have HTC Desire, and I know that I have QuickOffice. The problem is when I put a word or excel file on the .quickoffice folder on my phone, nothing comes up on the mobile when I disconnect. Therefore I was wondering if anyone could recommend me a program where I can either write, or read written files like Word and excel files?
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Apr 30, 2010
I have to access to the data folder of other applications from my application to read configuration's file and so on but it seems it's possible only to read data from the sdcard and my application's data folder. Can you suggest me how to solve this problem?
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Jul 16, 2010
I need to carry over the "lib/armeabi" part as well. First off, is this the correct approach for add a 3rd party .so file, and if so, can I force it to preserve the dir structure? If I'm barking up the wrong tree, what is a better way to handle this?
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Feb 2, 2010
I am currently working on a group project to build an Android game. I have been delegated the task of building a PC based level editor (which is all done). All I have to do now is decide on the file format for the map that is outputted. At the moment it is just a standard text file with different numbers to represent different tiles; E.G 0=path 1=wall 2=enemy.
1 1 1 1 1 1 1 1
1 0 0 0 2 0 0 1
1 1 1 1 1 1 1 1
The actual Android game then takes this file and stores the values into a 2D Array. However those who are making the actual game are having difficulty opening a text file, and others have told me it has to be done using an XML file. I have now been asked to find a away to take in this input. how I would read the text file and put the values into a int array[][] ? Or if it is easier, use an XML file and tell me how to format that file and read the values into a int array[][]
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Aug 5, 2010
1. Can u use the Desire GPS without sim or internet connection
2. Are there apps for reading excel files or pdf files
3. Does the OLED screen leave finger prints
4. how does the OLED screen compare to a iphone 4 or HTC HDA2
5. What is the desire like for syncing with vista or windowblows 7.0
6. Can the desire run DIVX files
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Jul 10, 2010
Installed on Eris (2.1): Laputa, Aldiko, Tulip, Wordplayer
On laptop: Mobipocket, Caliber, MSWord
There's a vast amount of material in MSWord format that I wish to read on my Eris. I can save a file as .txt and put it on my SD card using Astro, etc., but Quickoffice and Tulip are the only readers able to read those files - and both are otherwise inadequate. I've never passed the Caliber IQ test. It seems to convert to epub, but none of those readers ever see the result.
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Oct 20, 2010
My music has ID3 version 2.3 tags (most common). About 10% (2,500) of my music is AAC (.m4a) format which is MP4 tagged. All my songs are very organized into 11 different genres. Everything has a title, artist, and album assigned to it and looks great in my iPhone, iTunes, MediaMonkey, and Mp3tag program. When I add my music to my Samsung Fascinate, it reads the tags of my .m4a music but when I go to genre, things are messy. It appears to be putting albums in the genre section (only with .m4a files). Example: Lets say I have an .m4a of Garth Brooks, Thunder Rolls, No Fences (album), Country (genre)In my Samsung Fascinate player, it will be found in the genre section under "No Fences". If I click "Country" genre where it should be, the song will not be listed there. It seems to be reading .m4a Album tags as genre and not reading the appropriate tag "Country".I hope someone can help straighten this out without having either manually edit each song tag OR convert all of them to .mp3 and deplete the song quality.
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Apr 16, 2010
I'm porting to Android. My existing project has a ton of resource files that I'm porting into my Android project. I have them all in /res/raw/, and I would like to access those resources in my native library with functions such as fopen() and such. Can this be done, or do I have to go through JNI for this as well? I would really prefer not to, for ease of porting and possible speed and memory reasons.
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