Android :: Multicast Permission Of Dalvik And How To Attach To Dalvik Env
Sep 16, 2009
1. I have a c lib which will send & receive multicast package, if I lauch it in native ap, everything is OK, but if lauched through jni ,so it run in dalvik env, it can not receive multicast, i think is may be disabled by dalvik, is there any permission can enable this feature?
2. In this lib i will make some callback of function in dalvik class. according to tranditional method which can run under JDK1.5 & 1.6 as follow: (I make it under source code env not NDK)
In some initialization method save jvm pointer
CODE:...........
it seems AttachCurrentThread not failed but env not correct.
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Apr 9, 2010
This question has been asked(and answered) many times about dynamically generating and loading java bytecodes at runtime into a running Dalvik VM, but is there any way to load dex files/bytecodes into an app at runtime?
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Aug 25, 2010
Possible Duplicate: What can you not do on the Dalvik VM (Android's VM) that you can in Sun VM?
What ever interviews i have faced.In every interview when interviewers come on android topic they ask this question.
"what is the difference between Dalvik VM vs Sun JVM?".
I have given some answers like. http://stackoverflow.com/questions/230193/what-can-you-not-do-on-the-dalvik-vm-androids-vm-that-you-can-in-sun-vm
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Jun 6, 2009
Through out of my Java projects I've got used to TDD with the help of this basic tools
JUnit (http://www.junit.org/) as Unit testing Framework Mockito (http://mockito.org/) as tool for Stubs and Mock objects EclEmma (http://www.eclemma.org/) as Java Code Coverage for Eclips
As far as I understand none of them I can use fully when I do coding for Dalvik:
JUnit -- android.jar has its own junit.jar and my assumption is you're supposed to use it, not the latest version from junit.org Mockito -- read this one http://code.google.com/p/mockito/issues/detail?id=57 EclEmma -- doesn't support Android JUnit tests
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Jul 6, 2010
I implemented a runtime bytecoder for Java apps based on Javassist. The idea is to introduce code to execute code remotely based on current context. Since the context is not the same at every moment, I need to perform the bytecoding at every execution (if needed). I tried to port my code to Android in order to test it on mobile devices (I already tested it on win mobile and iphone using phoneme and jamvm respectively). However, I could not find any bytecoding tool available for Dalvik. Is there any Dalvik bytecoder available or an ongoing project that I can join/check that is working on this issue? If not, is there any other alternative beside running a decompiler for dex files, and modifying it manually?
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Aug 18, 2010
Are there any compability issues between a standard JVM and Dalvik VM? Are there any classes or packages from the Sun SDK that can't be used on Android?
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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:..............
I also tried the same test driver code with a plain .class file which I didn't expect to work in a dalvik context for the obvious reasons, and it doesn't either.
Anyways, 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...
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Nov 17, 2010
The Android's VM is called 'Dalvik' on its offical site, but I found the name 'Delvik' has also been used with Android's VM in some forums and kind of articles. So could someone helps me to figure out what's 'Delvik'? it's just a miss spelling or something else?
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Feb 4, 2009
Solved this by following the instructions at http://www.mail-archive.com/android-porting@googlegroups.com/msg01340... Also realised - that looks like a more appropriate mailinglist too :)
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May 26, 2009
I am learning Dalvik by debugging the code. I found some calloc invocations in allocateAuxStructures() function return NULL. I cound't trace into the calloc function, so I don't know if memory really runs out or due to other reasons.
The following is my building environment:
CODE:........................
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Jan 28, 2010
I've seen a lot of use of final for local primitives.
Presumable to indicate to the compiler that the value shouldn't be changed.
However, what's the implication of this on Dalvik?
I believe final local variables are usually placed on the heap for extended lifetime (for use in inner classes), so is their a runtime overhead rather than using simple locals (which use Dalvik registers)?
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Aug 25, 2010
I have a jar that I need to reference from my Android project. I also have the src of the jar, so I could include it in the project itself. I was wondering if referencing a jar vs. compiling it in with the project using Dalvik makes any difference in terms of final Dalvik package size that gets generated.
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Jun 1, 2009
I would like to execute opcodes directly against the running Dalvik VM instance from within my application on Android. I'm looking for something similar to the C asm function. I have a list of opcodes for dalvik, but I am unfamiliar with how to either execute them directly, or write them out to .class files and execute them against some sort of VM CLI command like dalvikvm from within a running application.
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Jan 30, 2009
I am using Thread to display animation..I create a new thread whenever user preference is changed.Now I want to Remove the previous thread from Dalvik VM so that my application does not crash..How can I remove Thread from DVM?? I use Thread.stop() but it is not working.
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Jan 3, 2010
In theory, Dalvik executes any virtual machine byte code, created for example with the compilers of
AspectJ
ColdFusion
Clojure
Groovy
JavaFX Script
JRuby
Jython
Rhino
Scala
Are there already working versions of bytecode compilers for Dalvik available for other languages than Java?
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Jul 15, 2009
What version is the bouncycastle libs included in dalvik libcore code? I'm trying to use OpenPGP code to an app but I'm getting big conflicts and issues because of the existing code, but it doesn't include all bouncycastle code, and the version of android code I've checked out doesn't indicate the version of bouncycastle used.
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Jun 7, 2009
I am writing the report for my project and I was wondering if anyone could tell me how to find the current version of the Dalvik VM. My phone is a Dev phone running cupcake.
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Jul 1, 2010
As I've heard from Google IO 2010 session, Dalvik JIT compiler just support ARM processor.Do this mean my own build of Android source on Linux X86 or Mac OS X can not support JIT compiler?Should I use some target board with ARM processor to test Dalvik JIT compiler?
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Apr 22, 2010
I'm on the android bandwagon and started going through google's "view" tutorials. Everything was hunky-dory until I hit the grid view tutorial. I got errors all over the place when I started editing the "HelloGridview.java" File. I thought I'd fix it by following through with the next part of the tutorial, creating the ImageAdapter class, but it created more. I realized alot of my issues could be resolved by importing widgets which were not mentioned in the tutorial (i.e. android.widget.GridView,.ImageView, .BaseAdapter etc.) However, after all the reconciliation suggested by eclipse the files were finally showing no errors. I go to run it as an android app and bam, "Your project contains error(s)." window comes up. There are no errors showing on the files I've created. I cleared the error log and shut down eclipse and started again the error log now reads: Conversion to Dalvik format failed with error 1. I'm a little lost at this point. I think I've included the required information. If you need to know more let me know.
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May 11, 2009
I am trying to convert my project o SDK 1.5. It won't build with the errror: "Conversion to Dalvik format failed with error 2"
I have seen other threads refer to problem with annotations, but the code that is causing problems for me has absolutely no java annotations in it (no at-signs whatsoever, except inside javadoc comments). Is there any way to get feedback from Eclipse or the android tools about what the problem is? How am I supposed to even begin to debug this problem?
I am more than happy to change the code where there are problems (the problem is actually a large library that I use, but I use the library as raw code, not a foreign jar, so I have access to the code), but I don't know what to change. That error just doesn't give me much to go on.
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Aug 22, 2010
What are the minimal steps necessary (including retrieving the source code) to compile and run just the Dalvik virtual machine on Linux?
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Aug 19, 2009
I am tracing the Dalvik machine source code. According that, I want to make Dalvik runnable. I have seem the dvk project. But there has many problem result in fault. Are there have any way to make dalvik only without all android. Because make android will take too much time (about many hour)
dvk project: http://code.google.com/p/dvk/
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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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Jun 21, 2009
I am currently writing a paper on the Android platform. After some research, it's clear that Dalvik has room for improvement. I was wondering, what do you think would be the best use of a developer's time with this goal?
JIT compilation seems like the big one, but then i've also heard this would be of limited use on such a low resource machine. Does anyone have a resource or data that backs this up?
Are there any other options that should be considered? Aside from developing a robust native development kit to bypass the VM. For those who are interested, there is a lecture that has been recorded and put online regarding the Dalvik VM.
Any thoughts welcome, as this question appears subjective i'll clarify that the answer I'll accept must have some justification for proposed changes. Any data to back it up, such as the improvement in the Sun JVM when it was introduced, would be a massive plus.
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Oct 23, 2010
I moved my Dalvik to my sd card... can that damage my sd card in any way? I am using a class 4.
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Aug 10, 2010
I faced to the serious problem when building my environment. I use below software for compiling. android SDK (android 2.1) eclipse 3.5.2. At first, this problem occurred on eclipse 3.6. I looked for the reason and countermeasure on the web. As the result, I re-installed eclipse 3.5.2. however, the problem was not fixed yet... after building, the below message has been displayed. "Conversion to Dalvik format failed with error 1" if you know other countermeasure for this.
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Apr 10, 2009
I include JMF in my application. When i run my application the following type of error will occurring...
CODE:...........
How can i resolve this error?
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Apr 28, 2009
I just updated to SDK 1.5 and all of my projects are failing to build with the following error:
[2009-04-28 15:53:23 - Utilities] no classfiles specified [2009-04-28 15:53:23 - Utilities] Conversion to Dalvik format failed with error 1 ("Utilities" is the name of this specific project.)
I'm on Ubuntu 9.04 x64. Before the update to 1.5 everything worked fine.
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Feb 24, 2009
Below is a simple bench between Navive C and Dalvik Java, which is collected from Android SDK 1.1. Code...
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Jul 14, 2010
Can an Android process ever host multiple Dalvik VM's? If so, what scenarios can cause this to occur, and what would be the benefit of having multiple VM's in the same process?
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