Android :: Develop Using Libraries In Simple Java Project - Without Using Dalvik And Such
Oct 9, 2010
As I am very pissed off of using the emulator to develop any Java class, I thought of setting up a project in Eclipse and instead of the usual JRE I linked to the Android.jar (version 2.1) that usually the Android projects link to. I don't mean to use this to develop Layouts or other specific platform things, I was just trying to create a class that uses HttpClient.
It miserably crashes like this.
CODE:.............
I mean I'd like to develop libraries (and test them) so that when I go to the emulator I don't have to deal with them. Is there a good way to do this? This seems not to work for some reason.
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Mar 16, 2010
I am working on a on-screen keyboard for Android, and I need to recognize starting points, turning points and end points of lines drawn by the user on the keyboard. A simple straightening function would be nice, as it is difficult to draw a perfectly straight line even with a stylus, not to mention finger-only touchscreens today.What I am trying to write is something like Swype. Any good libraries that I can use or make reference to?
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Jun 13, 2009
I am new to android i have develop a some e book for android mobile but i never develop a game in android and i would like to develop a first simple just like tic toc . so plz help me where can i start with.
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Aug 11, 2010
I can now get our Android project to talk to our non-Android project. But there's still an issue: I are trying to have an Android class call a non Android Hello World class. I tried compiling our non-Android Hello World class in a separate Eclipse workspace. I then packaged it into a jar. I imported that jar into our Android Hello World class.
I then called one of the methods in the non-Android Hello World class. When I ran the Android Hello World class as an Android application, the following runtime error occurred. Here are the Android debug logs:
08-11 09:07:56.764: ERROR/AndroidRuntime(333): FATAL EXCEPTION: main
08-11 09:07:56.764: ERROR/AndroidRuntime(333): java.lang.ExceptionInInitializerError
08-11 09:07:56.764: ERROR/AndroidRuntime(333): at com.hello2.hello2.onCreate(hello2.java:27)
08-11 09:07:56.764: ERROR/AndroidRuntime(333): at android.app.Instrumentation.callActivityOnCreate(I nstrumentation.java:1047).....................
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Mar 7, 2010
I'm new to Java/Eclipse/Android, so this is probably an easy (if not stupid) question:
After creating a new Android project, I want to import some (what I think are standard) Java libraries. However, some import statements throw an error:
HelloAndroid.java:
import java.awt.Color; (The import java.awt.Color cannot be resolved)
import javax.imageio.ImageIO; (The import javax.imageio cannot be resolved)
while others don't:
import java.io.File; (no error)
I've done some googling and tried to add these classes to my class path by going to project->properties->libraries but I haven't been able to figure out what to do exactly.
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Nov 22, 2010
The Three20 project is really nice for building iPhone apps quickly using common libraries:
https://github.com/facebook/three20
Is there anything like this for Android?
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Aug 6, 2010
I'm trying to build a project in Android 1.5 that references another Android (library) project compiled against Android 1.5 and I keep seeing this error in the Console in Eclipse:
Target 'Android 1.5' does not support building project with libraries.
I'm running Eclipse 3.5, and version 0.9.7 of the ADT.
I followed the instructions here:
http://developer.android.com/guide/developing/eclipse-adt.html
What gives?
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Sep 1, 2010
I'm trying to use the JJIL libraries with my Android project:
http://code.google.com/p/jjil/
I followed all the instructions on importing libraries into eclipse on the android guides, and have had no successes. It just fails to import.
Can some one point me in the right direction with this?
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Mar 2, 2013
I'd like to develop a simple timecard app for Android, specifically targeted like the apps below.
Wrap Time - Time Card for Film Crews iPhone App Download on Appato
Crew Time Card - iPhone App
These only exist for Apple products, though. What is the easiest, most straight-forward (Windows-based) software for creating such an app? I've heard of something called Eclipse...? Or there's something from Google?
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Dec 26, 2009
I have to add java libraries javax.xml to the my android project, while I am trying to add them it shows the error "Conversion to Dalvik format failed with error ".
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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 24, 2009
I'm attempting to port a normal Java program over to Android, however I am having a problem with a huge number of missing Java packages (e.g., Android Java does not have java.lang.management). Is there a way for me to work around this, such as by adding the Java modules that I need?
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Nov 8, 2012
I currently have an application using the libraries swing, swing.table, and awt on a java applet that I have running. I want to know what are the steps to get the application running as a native android app. I heard that I could use programs like Phonegap to just release a web based app for multiple platforms, but I am new to Android Programming (so far I just made a Hello Android app). I searched swing and awt, but I could not find any useful info.
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Apr 1, 2010
I'm working on a program whose job is to parse a schema from a course at university (html) and synchronize it with a calendar in Google Calendar. A must-have requirements from the author is that the user must enter their user information (x...@gmail.com) then connect via the Calendar API to calendar services. ** The smartphone calendar via Intent is not okay to use **
The main problem is that there is no GData (Dalvik Java) for Android. But I checked on GitHub and found that there seems to be something going on com.google.wireless.gdata: http://android.git.kernel.org/?p=platform/external/gdata.git,a=summary Searched around and found some packets like simply-android-GData and GData on code.google.com, but none of them help with the structure of calendrar, and they can login to retrieve data rss, json, atom.
So my question is then whether someone has a solution that works quite well as a possible. next update of the SDK will provide, a full GData API?
Is it possible to compile a custom SDK from git and get with the functionality of git://android.git.kernel.org/platform/external/gdata.git?
Minimum functionality: View Calendars View Events Add Events Delete Events
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Nov 18, 2010
Does anyone know of any video encoding/decoding libraries written entirely in java? Bonus points if it works on Android. I'm trying to write a video decoding application for android, where I have access to the frame level decoding functions (which is absent in the android API MediaPlayer class)
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Jan 6, 2010
I'm writing a processing intensive digital sound processing app (requires numerous (50,000) Fast Fourier Transforms - FFT). This challenge led me to perform basic performance tests of Android running on an HTC Hero.
The results show the Dalvik VM to be >20 times slower than a modern JIT-enabled JVM running J2ME and 25-50 times slower than a C program performing the same operations on a similarly powered mobile phone. For example, this simple iteration over an empty method 2 million times takes 1.4 seconds even though it doesn't do anything. The same iteration is performed in milliseconds by a C program and about 100ms on a modern JVM. Code...
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Apr 20, 2010
Besides making an HTML5 app (which may very well be the answer to this question), are there any other languages I can develop in for android besides Java?
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Dec 13, 2011
how to develop applications for android through java? And i want to know the scope for android developers in big companies... How can I get them?
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Sep 30, 2010
Is there any Java validator libraries i can use to validate text input from an android app?
i know that in spring there are validators for various different types such as checking if a value is a int, if a value is a valid email, etc etc.
Anything similar in core Java or even android?
cheers in advance. i don't want to re-invent the wheel if its already been implemented. i could always sue Java reg expressions to construct my own ones but was wondering if their was one done specifically for email formats.
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Apr 3, 2010
I have a project that I would like to add external libraries to (and have them packaged with the application) but I am not sure it is happening. I read on this link:
http://developer.android.com/intl/fr/guide/appendix/faq/commontasks.html. how to, but they do not show up in any of the /data/data/project directories. Does anyone know how I can confirm that the libraries were in fact added to the project for use at runtime?
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Apr 2, 2010
I am relatively new to android but a very big fan. I'm not a stranger to development on handheld devices, since I have some experience with Symbian OS, both 3rd and 5th edition, using C++. Implicitly I prefer development using this language, so I was a little disappointed when I heard that the preferred API for Android is in Java, though the core of Android is linux.
I read in a book that at least some parts of the Java API for android is just a wrapper for C/C++ frameworks. My question to you:
Would it be possible to develop applications in C++ without going through the Java wrapper? As far as I know, the NDK does not provide support for all the features within Android ( for example SQLite, though it's heart is not java ).
I believe it is not impossible ( I've seen some demos of early stages of Qt ported on Android ), but I'm not sure how to approach this. Would these applications be installable via an apk?
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May 2, 2010
I'm trying to develop an external library (not sure if that's the right term) to provide prepackaged functionality in Android projects. Working in Eclipse, I've added the appropriate android.jar file to the build path, and everything is happy both while editing and upon compilation.However, when I use Android's Handler and Message classes (android.os.Handler, android.os.Message) for inter-thread communication, I get exceptions unless I'm running within an Android app, on the emulator or a device. I can no longer test my library in a "standalone" way without having to go through a running Android target.Is there any way for me to include these two Android classes and still be able to test my library standalone? Do I need to have the Android source available? Or would it require some sort of conditional compilation hand-waving?
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Mar 18, 2010
I've done changes in an Android native library and installed a new system.img file but am now getting an unrelated Error on startup. I can get past it by swallowing the error but I wanted to know if anyone can explain what the issue is.
The Android implementation of Logger.java claims that it is Forcing the LogManager to be initialized since its class init code performs necessary one-time setup. But this forced initialization results in a NoClassDefFoundError. I'm thinking that it has something to do with the class not having been preloaded by Zygote yet but am not that familiar with the whole class loaders and VM business.
code:....................
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Jun 11, 2010
I'm wondering if and how one can load dex or class files dynamically in dalvik, some quick'n'dirty test function I wrote was this:
CODE:.................
whereas the Foo interface is this
CODE:.................
and f.dex contains some dx'ed implementation of that interface:
CODE:...............
The above test driver throws at defineClass() and it doesn't work and I investigated the dalvik code and found this:
http://www.google.com/codesearch/p?hl=en#atE6BTe41-M/vm/Jni.c&q=Jni.c...
So I'm wondering if anyone can enlighten me if this is possible in some other way or not supposed to be possible.
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May 8, 2009
I have been tasked with porting a large Java code base to the Android platform. The project makes extensive use of AWT which isn't' supported on Android. I'm looking for a tool that lets me visualize all of the classes in the project. I'd like to be able to see all of the relationships between classes so that I can get a good idea of where to start the port.
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Apr 28, 2010
Since i'm still new on Android programming, I have some problems on some issues. I have a QuadTree data structure implementation in 3 seperated Java files and i would like to use this data structure in my application. But i don't know how to use this .java files in an Android project. I tried to put them in a new Android project, just for testing, but I get lots of errors. Could anyone help me about using this java classes in my Application?
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Nov 12, 2010
I'm creating a android.text.format.Time Object from a java.util.Calendar Instance, and I read it out field by field.
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Sep 10, 2010
I've got a little problem...Well, let me first state what I'm trying to accomplish. I had a spinner that pulls strings out of a stored array.
Like so, you dont need to read it though:
CODE:...........................
So far I've got a custom SimpleAdapter.
Here is the Problem!! : the text comes up but not the image. Heres the code:
CODE:........
I plan to use a switch statement to set different images to each name. however i stopped here until i can get any image to show. How i'm calling
CODE:........................
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Mar 20, 2010
Could someone please suggest me a good/efficient way to communicate with the server. I could think of two options 1) Use http post methods to send data to a php script at the server which would later call the google api's written in another java program (jar)or use php to use google api's (if its possible) to find nearby restaurants and send the list back to client. 2) Use simple java socket programming. The server has a jar file that supports multi threading and it does the job of finding restaurants and sending the list.
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Oct 18, 2010
I have two different project A & B. Inside the project A I link the source from project B so activity from project A can start the activity from project B. I'm using Eclipse Galileo.The problem is, when I want to edit the value of a view in activity B, the resource id from both projects have some conflicts in it. So when I call findViewById() in activity B I got a view from the activity A instead.I've declared the activity B inside the AndroidManifest in project A. I've even tried to start the activity B as the entry point of the application but it didn't show anything at all. It's like the findViewById tried to search the view of project A only although I've specified the package name correctly.
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