Android :: What's A Good Library For Parsing Mathematical Expressions In Java?
Feb 9, 2010
I'm an Android Developer and as part of my next app I will need to evaluate a large variety of user created mathematical expressions and equations. I am looking for a good java library that is lightweight and can evaluate mathematical expressions using user defined variables and constants, trig and exponential functions, etc.I've looked around and Jep seems to be popular, but I would like to hear more suggestions, especially from people who have used these libraries before.
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Oct 13, 2010
I have to parse some complex xml files inside my Android application. Is there any good library for doing that like there is TouchXMl for iPhone?
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Jul 11, 2010
The API I need to work with does not support xpath, which is a bit of a headache! The xml I want to parse is as a String. My questions: Is there a Java equivalent of "simplexml_load_string", where it makes the string into an xml document for parsing? Which is better for parsing, SAX or DOM? I need to get a couple of values out of the XML and the structure isn't that deep. [3 levels]
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Oct 8, 2009
I'm trying to parse JSON in android but am having trouble with accessing sub children of an object. I am trying to extract augment from the following. Code...
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Feb 22, 2010
I have to parse a HTML file using java. I have gone through a lot of HTML parsers, but seem to understand none of them. So please help me out with the type of parser that should be used for an android app and how to parse a HTML file.
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Jan 28, 2010
i have several gpx files on my sd card and i show them (the filename) on a listview. if i choose a gpx file, the track is load in another activity with a listview,too (adress-strings are shown). if i use the back button, the listview with the filenames is shown again and i can choose another file. but if i repeat this the third time, i get this error:.................
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Nov 1, 2010
Iam implementing java code for MYGlucoHealth monitor. I have to catch the bluetooth data through my application and parse it to the readable format. (later i store that in SQLite database). But according to the protocol specification they provided, i cant understand how to read and parse it. i know how to pair the device with my application.But i don't know how to parse the data bytes as per the device specification protocol.Can anyone tell me how to do that. Anybody done with this kind of coding?
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Aug 6, 2010
I have a need to render and display charts (bar charts for now, but more types may be needed later) in an Android app I'm working on. I've done some looking around and it doesn't look like there are any really good, mature charting libraries for Android yet.
Do you know any?
Edit to add some details of requirements
Bar Charts
Horizontal bar charts
Double stacked bar charts
Axis labels (including rotated 90 degrees on the y axis)
Labels above each bar on the chart
Shaded or custom backgrounds
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Jun 9, 2010
Specifically some that may cater to an experienced developer (C#) but not necessarily familiar with Java/Eclipse?I have seen a couple vids on YouTube but they are either short (not much you can learn in 3mins or patronizing)
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Aug 12, 2009
I'm trying to create an app for Android that simply sends a command to an SSH server. No response needed, I just need to be able to send a command. I was wondering if there's any java library out there that I could use? No advanced stuff needed, just a pure connection to send the command.
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Nov 11, 2010
I don't want to code things that already exist.
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Sep 5, 2010
Is there any ready library to read ePub format? I found ePublib in
http://github.com/psiegman/epublib. I'm still learning how to use it. I wonder if there is ePub jar which ready to use for read ePub format in android.
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Jun 30, 2009
I would like to build an app that OCR a pictures and get text from them. What java library should I use?
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Oct 29, 2010
Is there a Java yaml library as good as snakeyaml for Android? (Or is anyone successfully using snakeyaml on Android already?)
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Apr 8, 2009
I have developed bluetooth application where native library will be initiated by Java application (using JNI wrapper). JNI will call the entry function of the native library and then it will create Pthread to for scanning the device. Once Scanning is over, i will get the callback which i registered during the entry function of the native lib (called by app). But i haven't received the callback, but if i run the same native library in the shell (executable from the shell terminal) it is working fine. Can any one help me, if there is any specific architecture needs to follow while developing Java application based on native lib?
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Aug 7, 2010
I'm writing a JNI library for a game. I have java code that I want to replace with functions from the library. Is it true that most of the devices out there are compatible with my code if I compile it for the default arm processor, or will I find that there are many devices out there that my library won't run on? What I'm asking is, should I maintain java code that does the same thing as my jni library for compatibility purposes, or is it safe to have jni libraries alone? How large is the group of devices that cannot use the libraries I write? Where are there stats regarding what population is using processors other than the arm processors?
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Mar 17, 2009
I need to build a java.beans.PropertyChangeListener which is part of JDK (rt.jar) but not part of Dalvik.
Trying to copy the sources to my Application I get this:
Attempt to include a core VM class in something other than a core library. It is likely that you have attempted to include the core library from a desktop virtual machine into an application, which will most assuredly not work. If you really intend to build a core library -- which is only appropriate as part of creating a full virtual machine binary, as opposed to compiling an application -- then use the "--core-library" option to suppress this error message. If you go ahead and use "--core-library" but are in fact building an application, then please be aware that your build will still fail at some point; you will simply be denied the pleasure of reading this helpful error message.
My solution: 1) build a core library with consisting out of java.beans.PropertyChangeListener 2) integrate that library (jar?) into my application.
My question: - how can I build a core library using eclipse?
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Aug 28, 2010
I'm making an android client for a web site. my app have to go through the website, parse HTML, post some forms, send HTTP requests etc. What library covering all this stuff you recommend me to use ?
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Apr 27, 2010
I have an existing C++ library that I want to compile into a static library, and call commands from it with Java on the Android platform. I am brand new to Android development, and just need to figure out how to set the Java interface up so my C++ lib works on the Android. Where do I start?
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Nov 12, 2010
I need a library in java that can take HTML content and generate text in the same format that is generated by the Linux lynx program.
That's it. Reasons below if you care.
I need to expose data provided by 3rd party servers to end users on Android. Data format is ancient, in badly formatted HTML, so much that I've tried reading it using java and it fails occasionally (unacceptable). It is also growing every month (preinstall ruled out) and I can't convince them to change to "modern" stuff (life would be great in XML etc.).
Shortest route: I wrote a class to use the W3 html2txt service online (google search it). It worked fine on the app until I got complains and noticed that the W3 service fails occasionally. It's not that big of a deal, but the black box logic expects the output to be in this "lynx like" text format.
So I would like a library to do the conversion (HTML->TXT) in "lynx style" inside the app and avoid the outages in the W3 service. And besides, the lynx output the probably the best I've seen, the most organized and neat.
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Jan 11, 2010
I'm using the Android Development Toolkit (ADT) in Eclipse Galileo. I've created a project in which to develop some util classes, which I intend to use in several upcoming Android projects. However, when I come to use these util classes (deployed as a jar and included in the Android project as a user library), I get a java.lang.VerifyError during the startup of the emulator. Can I force the verification of these library files, or do I need to include them as part of the Android project, and not as an external jar?
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Aug 2, 2009
Do you know a library or method to serialize / deserialize Java bean to json in android?
how i can introspect a javabean and fill its fields?
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Jul 29, 2010
I am trying to parse a json object using gson in Android application ,the test passed quite gracefully in emulator ,while i used the actual device ,the problems started.
I am getting the exception as follows.
CODE:...................
I am using gson 1.4 version.The code i use is:
CODE:..............
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Aug 31, 2010
Here is the JSON result:
CODE:...................
UPDATE: And here is my code (assume buildQuery and RestClient are valid):
CODE:...................
I get the following Exception on JSONArray quotes = query.getJSONArray("results");:
org.json.JSONException: Value {"quote": ...
The value of "quote" is printed in the debugger.
How can I parse this correctly?
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Apr 8, 2013
Is there a Java library for colourings text in an EditText? Or is this just accomplished with Regex? I looked into Google Prettify but that seems to be for static text.
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Aug 18, 2010
My XML looks like: <key>A</key> How do I extract the string "A" from the XML with java in Eclipse?
My Java code looks like: Code...
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Apr 2, 2010
I using Eclipse Gallileo to develop Android application and Java library for this application. Please, help to set Android application dependency from my custom Java library rightly. I want this library automatically build if necessary and be included to .apk file.
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Aug 8, 2010
I followed the instructions here on how to create an Android library project, and use it in an Android application:
http://developer.android.com/guide/developing/eclipse-adt.html
But it is not working. I can see the library project is added to my application but I cannot reference anything in it because it won't build. The R.java file from the lib is NOT being added to my application project, so the lib project contains tons of errors, everywhere it tries to reference it's own R.java file.
I don't know if this has anything to do with it, but in the console there are messages stating that the there is "No resource identifier found for attribute 'X' in package 'Lib Package'. My library package has a a few styleable attributes defined for a custom view I made, all of which are being complained about in this console message. The library builds just fine, and I don't get those messages in the console until I hook the library to my application, so I don't know what's up with this.
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Nov 11, 2010
I have an Android library project that makes calls to PreferencesManager.getDefaultSharedPreferences.
I have 2 version of my app, paid/free, and they are not able to access the preferences stored by the library code.
Can someone tell me the right way to store values in SharedPreferences in library code and have the values available to projects that include the library?
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Aug 17, 2010
According to this SDK guide, unit-testing a Library project can be achieved by creating a standard application project, reference the Library project and then instrument the application for unit testing. However, when I do this and launch the test application I get the message.No tests found with test runner 'JUnit 3".I'm using Eclipse and the Android ADT plugin, all latest versions.the projects compile just fine. The test project also installs fine to the emulator. But in the console I can see that it looks for <library>.apk, which of course doesn't exist since I'm compiling this as a library into the test project.
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