this post was submitted on 02 Jul 2023
94 points (96.1% liked)

Android

27939 readers
289 users here now

DROID DOES

Welcome to the droidymcdroidface-iest, Lemmyest (Lemmiest), test, bestest, phoniest, pluckiest, snarkiest, and spiciest Android community on Lemmy (Do not respond)! Here you can participate in amazing discussions and events relating to all things Android.

The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:

Rules


1. All posts must be relevant to Android devices/operating system.


2. Posts cannot be illegal or NSFW material.


3. No spam, self promotion, or upvote farming. Sources engaging in these behavior will be added to the Blacklist.


4. Non-whitelisted bots will be banned.


5. Engage respectfully: Harassment, flamebaiting, bad faith engagement, or agenda posting will result in your posts being removed. Excessive violations will result in temporary or permanent ban, depending on severity.


6. Memes are not allowed to be posts, but are allowed in the comments.


7. Posts from clickbait sources are heavily discouraged. Please de-clickbait titles if it needs to be submitted.


8. Submission statements of any length composed of your own thoughts inside the post text field are mandatory for any microblog posts, and are optional but recommended for article/image/video posts.


Community Resources:


We are Android girls*,

In our Lemmy.world.

The back is plastic,

It's fantastic.

*Well, not just girls: people of all gender identities are welcomed here.


Our Partner Communities:

!android@lemmy.ml


founded 1 year ago
MODERATORS
 

More concretely, I'm asking this: why aren't applications compiled fully to native code before distribution rather than bytecode that runs on some virtual machine or runtime environment?

Implementation details aside, fundamentally, an Android application consists of bytecode, static resources, etc. In the Java world, I understand that the main appeal of having the JVM is to allow for enhanced portability and maybe also improved security. I know Android uses ART, but it remains that the applications are composed of processor-independent bytecode that leads to all this complex design to convert it into runnable code in some efficient manner. See: ART optimizing profiles, JIT compilation, JIT/AOT Hybrid Compilation... that's a lot of work to support this complex design.

Android only officially supports arm64 currently, so why the extra complexity? Is this a vestigial remnant of the past? If so, with the move up in minimum supported versions, I should think Android should be transitioning to a binary distribution model at a natural point where compatibility is breaking. What benefit is being realized from all this runtime complexity?

you are viewing a single comment's thread
view the rest of the comments
[–] MajesticNubbin@lemmy.world 81 points 1 year ago (2 children)

The Androids book by Chet Haase provides a good look at the early history and design decisions of the platform and how they came to be made.

At the time there was a debate inside the team over what language their app development framework should use, with native C++ and Java being the two main options (I think there might have been another option or two, I can't recall). In the end Java won out, and from memory one of the main reasons was to make it easier to make apps and not need to think about the lower level parts of the platform, i.e. the platform takes on the complexity internally in order to lower the barrier to entry for app developers. The idea being that a lower barrier to entry would result in more apps being developed for the platform. For a brand new platform that lives and dies by the apps available for it, that's a pretty sensible trade-off.

And yes, Android has a lot of vestigial remnants of the past, the Android framework team has been very particular about maintaining as much backwards compatibility as possible within the framework.

[–] roneyxcx@lemmy.world 5 points 1 year ago

The other option was C#, I haven’t read the Android book. But have read the legal fillings and internal documents from the discovery process during the Google vs Oracle lawsuit for Java patents. It was clear in it C++ was never a good candidate due to memory management and tooling being behind Java and C#. C# was closed source back then and Java was the only option.

load more comments (1 replies)