I want to start off by saying that I am not a Java developer. I've never ventured outside of Windows and C#. But for my current goal neither C# nor Windows is adequate.
I am planning on using RPI4. The problem is the hardware I would like to integrate only provides SDK for Linux(x64 x32) and Android 4.0+. Now RPI4 has a an arm based CPU so using the linux sdk is out of the question. But the android SDK is for ARM based devices and it also supports arm64-v8a which would be the RPI.
So my question is whether I could use these .so and .jar files to make something on the RPI or am I out of luck?
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The Android 5.0 page states that 'Pure Java language apps run as 64-bit apps automatically'. I cannot find any documentation on how to configure/build my java apps for Android 5.0. Has anybody had any success with this yet?
You're misinterpreting what they meant: they meant that Android applications without an NDK component built in C/C++ (i.e., built entirely on the Java based Android SDK) will automatically be compatible with 64 bit processor devices, not that desktop/Swing Java apps will run on Android devices.
I have a game written in C/C++ with SDL 2.0, I would like to port it to mobile platforms (specifically Android and maybe other platforms too). I read SDL has a native support for Android but the game itself is written for Windows at first, although no Windows-dependent libraries/code were used. As for Android, I only used the Java based SDK before and never integrated it with native code. Which changes (if any) do I have to make to the C/C++ so I could use it on Android platform? How exactly do I acually compile the whole thing to an APK? Is it possible to use Java and C/C++ for the application, I mean, the game's activity will be the native one but the other activities (menus, settings, etc) can be written with the regular Android Java SDK?
The Android README file in the SDL source release outlines most of what you need to know with regards to porting your SDL App to Android. There's also an example project for Eclipse that demonstrates you can modify to suit your needs.
https://hg.libsdl.org/SDL/file/d6a8fa507a45/README-android.txt
The iOS README file is also useful, namely for the sections on events and input, as much of it carries over to the Android port.
https://hg.libsdl.org/SDL/file/d6a8fa507a45/README-ios.txt
If you need help setting up the build environment, check out this (brief) tutorial which covers installing the ADK and NDK, SDL source, building a project, programming for Android and interfacing with Java.
http://www.dinomage.com/2013/01/howto-sdl-on-android/
http://www.dinomage.com/2013/05/howto-sdl-on-android-part-2-platform-details/
(1)
I dont know anything about SDL but as long as you only make calls suported by the android NDK and what ever android supported library it should be ok. I guess you would have to set up your tool chain such that it links with SDL for android?
(2)
Yes it is possible to call c++ (ndk) from the android sdk and vice versa (see 3)
(3+ rest)
See
https://developer.android.com/tools/sdk/ndk/index.html
If you download the NDK you can also see examples of how to compile with NDK to APK
What alteration should be made in a Java Application to be able to install it on Java Enabled Smartphone?
I tried using a random app of mine to see what happens, when I open it on the cell, it says Install? I say yes, and it says invalid file.
Now I was wondering what alteration should be made?
My smartphone (Samsung S8500) runs on bada which is more or less the same as Android, but alterations in the General.
You need different SDK for smartphones. Like for Android, you need Android SDK 1.5 or any other version. You just cannot install the same application. You need to develop using the resources provided by the SDK.
If your application is Java based mobile application then you can use some tools to convert it for Android. Doesn't work every time but worth a try.
In your case, Bada OS is not like Android what i learn from here. So, you need to develop the application using J2ME .
I have never tried out the Android SDK and do not own an Android phone. However it seems that certain libraries are excellent, for example the text to speech lib. Is it possible to use this library with a desktop VM and did anybody here try this?
You could get the sources from android.git.kernel.org and try to rebuild them against a desktop environment, but it would be a lengthy project - you need not only the java stuff, but the underlying drivers, native libraries, customized c library, and add-on os functionality to support them.
The android SDK includes a qemu-based phone emulator in which most functionality works as on the device. This should be fine for playing with the capabilities, though is not something you would want to use to deploy them. There is also an x86 community build of android which people put on netbooks or run in virtualbox. Word is that the official android emulator may be moving to something similar since it's substantially faster to run x86 code on a customized os image in a vm than to emulate an arm processor.
There's also something of a simulator which tries to provide enough of the android o/s services to sort of run apps natively on the development machine without a vm, but the google folks have implied its a bit of a hack and not well maintained.
What are mobile phones supporting Java Android?
Is there any Nokia phone supporting this technology?
What should the mobile contain (a framework, a plugin.. etc) if we want to deploy a Java Android Application?
Android can be deployed to many devices with custom builds of the OS; anyone can build Android . It is not limited to particular handset makers and you might want to consult the makers for official lists of deployed devices.
There is nothing the device needs to contain (other then an appropriate targeted version of Andrdoid) to deploy an application.
One important note is that the application IS NOT run in the JVM, the code is only written in Java and then converted to Dalvik bytecode when compiling (Android runs on the Dalvik Virtual Machine). Since the code is written in Java though you can make extensive use of existing libraries and use them in your applications.
There is a fairly comprehensive list on Wikipedia comparing devices running Android, including forthcoming devices.
Nokia seems to have no interest using Android platform for its devices.
If the device is a certified Android platform, there is nothing one needs to add for deployment.
I think most phones that run Android should support Android applications. However, IMHO one would be hard pressed to compile a list of those phone.But rest assured, it's a lot. Someone DID make a list! And yep, it's a lot.
Some quick Googling reveal that Nokia seems to not like Android so I would assume there is not a Nokia phone with Android.
Framework: Eclipse Galileo with the ADT plugin
My advice:
read this site inside and out! http://developer.android.com/index.html
It answers all your questions.