I have seen questions and topics in google referencing running JRE apps in the android environment, but I am actually thinking about the reverse.
I understand Android runs on a different runtime engine than the standard JRE.
Is it possible to build an app to run on android, but also build and run the same app in the JRE on a desktop?
I assume there would be restrictions on API usage, I was just thinking about the possibility to distribute a simple app that could be useful on both the device and the desktop.
I think the bigger problem here is going to be accessing the Android API and environment on your desktop. Do you have a plan for that?
If you have the Android environment running on your desktop then there shouldn't be any problem running your app there.
This answer offers an alternative suggestion.
Short answer: your desktop and Android app can share a large portion of code, but you aren't going to be able to run Android-specific code on the desktop.
Related
I’m a mobile developer and recently adept at using containers with docker. I’m developing a container architecture for my graduate project. One of the modules of this architecture would need to be run on an android device. But I could not find information on how to run a container on an android device. It could be something simple like an alpine image with python.
Can anyone tell me if there is a possibility to run a container on an android device with docker, or even kubernetes?
In 2021, the answer is definitely yes.
Here is a tutorial on that topic, which shows you how to run docker directly on Android, without VMs nor chroot. Note that you do need to root your phone and build a custom kernel though.
If you only want a quick look of docker running on android without getting your hands dirty, check out this comment on GitHub.
It is possible to use it for running docker on an android device using an application like termux or userland to install a qemu package.
The best way is to use alpine linux terminal, an android app available on github.
This alpine term app has a QEMU to run like alpine ISO. All things are automated
and this works with x86_64 kernel on any android.
Some android phones have a KVM kernel so this device can run faster alpine term
Also my friends made a video on a YouTube channel to run docker on any android phone without root.
I must note that I am not an expert in Android development. But I researched on this topic, and #Emile's answer is the easiest and closest you can get - as it seems.
You can actually run Fedora (and not only) image on top of the Termux and then launch Python inside. This is obviously not a docker, but might be helpful.You can find more info here.
In addition, I've found this topic on Quora which is a similar question:
Think about it: Docker abstracts the OS and that is all. The Android
OS is quite a different kernel than linux distributions, even though
it is linux. It might be tricky to get applications meant for a linux
distribution to run on Android/Docker.
One of the main reasons to use docker is that it can provide
self-contained packages of applications which do not affect the rest
of the system. The Android applications, packaged as .apk files are
just that.
Other than that I was able to find this topic on StackOverflow which does not really resolve the issue. As the issue might be related to AUFS and some Kernel features needed by LXT which are not present in Android - now some of them is from what I remember.
Also there is a claim that it is possible on docker forum and weibo (use translation to English), but there is only a screenshot provided by user and no details on how to do it, besides "it took a lot of effort" statement. So it would seam that this is still a not well known part, or maybe someone will be able to actually provide more complementary information - maybe try on Docker forum or GitHub.
We open the Android container, which can run the docker container on the Android operating system. Not only can run Docker containers, but also other containers, such as podman. In addition, we have also enabled the container to support checkpoint and restore functions, and support the migration of containers across architectures and operating systems. See https://github.com/CGCL-codes/Android-Container for details.
Some people think it's impossible but it isn't you can run a full ubuntu on your phone by this android app https://play.google.com/store/apps/details?id=com.termux
You can even install gui envrioment and connect over vnc everything is supported in this so also docker or website hosting and so on
(Make sure you follow al install steps in the app https://play.google.com/store/apps/details?id=studio.com.techriz.andronix to install linuxes like arch or ubuntu fedora or more you have to install these it doesn't work by just opening termux)
YOU DON'T HAVE TO ROOT TO USE THIS METHOD
Disambiguation first: question is not about developing or compiling with openjdk code that would be run on dalvik in production. It is about using oracle runtime on android environment.
I'm using java for running small desktop utility application. I have no experience in Android and iOS development and I'm curious to which extent my classic java skills may be transferred to the mobile field.
I've googled couple of methods for running java application on iOS embedding runtime inside the application package. Android has its own partially incompatible and slow java virtual machine. It still is better than nothing, but I'm curious if it is possible to run application on genuine hotspot(openjdk) virtual machine. Android as well as iOS have the ability to run native code. May this ability be exploited to use third-party (non dalvik) jre on android?
I'm not interested on google play market so restrictions from it, if there are any, may not be taken into account.
Rooting is also possible since I'm going to write tools for myself. I would prefer methods that would be easy for installing. Like putting some package files and editing couple of options. And not build my own android distribution like CyanogenMod.
Without rooting the device, I don't think there is a way to do it.
Apparently, see http://openjdk.java.net/projects/mobile/android.html
The instructions are slightly out of date, I managed to do some hacking and get it to build though. Not sure if it runs yet
I have been working with standard android for some time. Recently I have been building android sdk for windows and find some interesting things in Android build env. There is a command called lunch which can be used to list all available targets to build. However, it does not list sdk and its variants,even though they are valid options.
Does anyone know why is that the case?
Also can I build any specific module in Android sdk without building the whole sdk. (It could be a great help as I dont wanna build the whole sdk, if I gonna do a small change in one component.)
Thanks
Under the hood, lunch uses make, so if some pieces of SDK do not change, they won't be rebuilt.
My speculation about your first question: rebuilding SDK was never considered a major task of lunch. It is most often used to port or mod the system and produce an installable system image, and receive the ADK as by-product. Later, people realized that often (with root access to the device) you can iterate over one component without need to reinstall the whole system image.
I've been using eclipse to develop Android apps with phonegap until, a few weeks ago, I decided to try Sublime Text 2. I found it to be so much better than the eclipse editor so I would like to keep using it. Only thing I'm missing is a quick way to test the app on the device inside Sublime.
Luckily, someone else also had the same idea and developed a plugin for this:
https://github.com/Korcholis/Andrew
Sadly, I cannot get it to work, I installed ant and pointed the plugin to adb but then nothing happens when I try to create a new project (and there is no error message in the console).
I also found this other plugin:
https://bitbucket.org/ucomesdag/sublime-android
But I have no idea on how to install and run it.
Did someone else found a way to do this?
A quick update into 2014.
As of PhoneGap Cordova 3.0, it is no longer required to develop Android apps via eclipse. You are free to use any code editor or IDE you wish as app building is done independently from eclipse via a simple command line.
cordova run android to package the .apk and install on any active devices detected by adb or
cordova build android to package the .apk only.
In your case, you can keep using Sublime and pop in the cordova run android command whenever you ready to go on a test run.
While I agree with Insane Coder that you should stick with supported IDEs to develop for Android, according to this link and existing Sublime Text 2 Ant support, you could build and develop your android project with this IDE (It will just take some time to set it all up... as opposed to using a supported IDE like IntelliJ or Eclipse).
Using PackageControl, look for "Ant". That will install syntax highlighting for Ant. Another plugin that enables the build command (ctrl+b) to work for Ant files, "Super Ant". You should be able to code for android in sublime text 2 with those installed.
On another note... Do you use windows? The Andrew project you link to, seems to have Windows compatibility issues. Apparently related to locating the "SDK" (he says sdk in Andrew's github page but, probably he means JDK?) in your hard drive. Which is probably a hassle because Windows typically installs stuff to "Program Files" and in code, that turns into "Progra~1" because of the space. In the link I give you there is another approach to it, so when you install the JDK set a folder that has no spaces in its name, like c:\java\jdk1.6.0_02 or something else that strikes your fancy. The problem you could be having with Andrew is that it isn't finding the jdk in your hard disk.
I'd like to learn Android app development but I don't want to use any IDE, especially Eclipse and its ADT plug in. It's just that I'm more comfortable with command line, executing commands myself and seeing what's going on beneath. I'm looking for a good reference/tutorial/ebook/walk through on the flow. Is there any such resources available?
From the android dev. website: http://developer.android.com/tools/building/building-cmdline.html
Ofcourse the title suggests using a different IDE, but it explains what directories you need, how to compile your .APK etc.
Ofcourse, you need de SDK and the tools from there, but that's a given. You can however use the above information to develop without Eclipse/ADT