What is Android [EXPLAINED] - Android General

What is Android?
Android is an open source mobile operating system that combines and builds upon parts of many different open source projects. What does this mean to you as a developer? You have access to the source code of the platform that is running on the phone. This can help you better understand how interface controls and the various other pieces work. If you happen to find a bug, you can also submit a patch for the issue, though this is a more advanced practice. Google has also pulled together a large group of companies (called the Open Handset Alliance) that both contribute to and use the Android OS in their hardware devices. This means that there is industry-wide support for Google’s OS, promising wide adoption across well-known vendors.

Related

Android Analyzer 1.0 published

Dear all,
I would like to introduce you to a free, open source project that has just recently been published on the Market and reached the 1.0 milestone.
Android Analyzer project aims at developing an Android application that analyzes and collects hardware and software capabilities of devices based on the Android OS. Our ultimate goal is to create a comprehensive, state-of-the-art repository of data for a wide range of devices - from mobile phones, to tablets, STBs, smarthome panels, and anything else that runs Android. The database will support the developer community in addressing fragmentation problems of the Android platform. You can access the source code, trackers and debug releases on:
code.google.com/p/android-analyzer/
Android Analyzer is made freely available on the Android Market, so that both developers and consumer can have an easy access:
market://details?id=org.androidanalyzer
The data is reported to and available on the AndroidFragmentation.com site (Database tab). We also have a sandbox backed that can be used during development.
Report statistics as of 01-Nov-2010:
Reports: 187
OEMs: 30
Models: 53
Operators: 56
We are very much interested in your feedback and always looking for volunteers to help us develop more plugins and extend the level of detected capabilities!
Kind regards,
Sinisha Djukic

【ROM 4.3.1【UN-OFFICIAL PURE AOSP】InsomniaAOSP【10/22/13 v.1.0】

【ROM 4.3.1【UN-OFFICIAL PURE AOSP】InsomniaAOSP【10/22/13 v.1.0】
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Open Source
What is the Android Open Source Project?
We use the phrase "Android Open Source Project" or "AOSP" to refer to the people, the processes, and the source code that make up Android.
The people oversee the project and develop the actual source code. The processes refer to the tools and procedures we use to manage the development of the software. The net result is the source code that you can use to build cell phone and other devices.
Why did we open the Android source code?
Google started the Android project in response to our own experiences launching mobile apps. We wanted to make sure that there would always be an open platform available for carriers, OEMs, and developers to use to make their innovative ideas a reality. We also wanted to make sure that there was no central point of failure, so that no single industry player could restrict or control the innovations of any other. The single most important goal of the Android Open-Source Project (AOSP) is to make sure that the open-source Android software is implemented as widely and compatibly as possible, to everyone's benefit.
You can find more information on this topic at our Project Philosophy page.
What kind of open-source project is Android?
Google oversees the development of the core Android open-source platform, and works to create robust developer and user communities. For the most part the Android source code is licensed under the permissive Apache Software License 2.0, rather than a "copyleft" license. The main reason for this is because our most important goal is widespread adoption of the software, and we believe that the ASL2.0 license best achieves that goal.
You can find more information on this topic at our Project Philosophy and Licensing pages.
Why is Google in charge of Android?
Launching a software platform is complex. Openness is vital to the long-term success of a platform, since openness is required to attract investment from developers and ensure a level playing field. However, the platform itself must also be a compelling product to end users.
That's why Google has committed the professional engineering resources necessary to ensure that Android is a fully competitive software platform. Google treats the Android project as a full-scale product development operation, and strikes the business deals necessary to make sure that great devices running Android actually make it to market.
By making sure that Android is a success with end users, we help ensure the vitality of Android as a platform, and as an open-source project. After all, who wants the source code to an unsuccessful product?
Google's goal is to ensure a successful ecosystem around Android, but no one is required to participate, of course. We opened the Android source code so anyone can modify and distribute the software to meet their own needs.
What is Google's overall strategy for Android product development?
We focus on releasing great devices into a competitive marketplace, and then incorporate the innovations and enhancements we made into the core platform, as the next version.
In practice, this means that the Android engineering team typically focuses on a small number of "flagship" devices, and develops the next version of the Android software to support those product launches. These flagship devices absorb much of the product risk and blaze a trail for the broad OEM community, who follow up with many more devices that take advantage of the new features. In this way, we make sure that the Android platform evolves according to the actual needs of real-world devices.
How is the Android software developed?
Each platform version of Android (such as 1.5, 1.6, and so on) has a corresponding branch in the open-source tree. At any given moment, the most recent such branch will be considered the "current stable" branch version. This current stable branch is the one that manufacturers port to their devices. This branch is kept suitable for release at all times.
Simultaneously, there is also a "current experimental" branch, which is where speculative contributions, such as large next-generation features, are developed. Bug fixes and other contributions can be included in the current stable branch from the experimental branch as appropriate.
Finally, Google works on the next version of the Android platform in tandem with developing a flagship device. This branch pulls in changes from the experimental and stable branches as appropriate.
You can find more information on this topic at our Branches and Releases.
Why are parts of Android developed in private?
It typically takes over a year to bring a device to market, but of course device manufacturers want to ship the latest software they can. Developers, meanwhile, don't want to have to constantly track new versions of the platform when writing apps. Both groups experience a tension between shipping products, and not wanting to fall behind.
To address this, some parts of the next version of Android including the core platform APIs are developed in a private branch. These APIs constitute the next version of Android. Our aim is to focus attention on the current stable version of the Android source code, while we create the next version of the platform as driven by flagship Android devices. This allows developers and OEMs to focus on a single version without having to track unfinished future work just to keep up. Other parts of the Android system that aren't related to application compatibility are developed in the open, however. It's our intention to move more of these parts to open development over time.
When are source code releases made?
When they are ready. Some parts of Android are developed in the open, so that source code is always available. Other parts are developed first in a private tree, and that source code is released when the next platform version is ready.
In some releases, core platform APIs will be ready far enough in advance that we can push the source code out for an early look in advance of the device's release; however in others, this isn't possible. In all cases, we release the platform source when we feel the version has stabilized enough, and when the development process permits. Releasing the source code is a fairly complex process.
What is involved in releasing the source code for a new Android version?
Releasing the source code for a new version of the Android platform is a significant process. First, the software gets built into a system image for a device, and put through various forms of certification, including government regulatory certification for the regions the phones will be deployed. It also goes through operator testing. This is an important phase of the process, since it helps shake out a lot of software bugs.
Once the release is approved by the regulators and operators, the manufacturer begins mass producing devices, and we turn to releasing the source code.
Simultaneous to mass production the Google team kicks off several efforts to prepare the open source release. These efforts include final API changes and documentation (to reflect any changes that were made during qualification testing, for example), preparing an SDK for the new version, and launching the platform compatibility information.
Also included is a final legal sign-off to release the code into open source. Just as open source contributors are required to sign a Contributors License Agreement attesting to their IP ownership of their contribution, Google too must verify that it is clear to make contributions.
Starting at the time mass production begins, the software release process usually takes around a month, which often roughly places source code releases around the same time that the devices reach users.
How does the AOSP relate to the Android Compatibility Program?
The Android Open-Source Project maintains the Android software, and develops new versions. Since it's open-source, this software can be used for any purpose, including to ship devices that are not compatible with other devices based on the same source.
The function of the Android Compatibility Program is to define a baseline implementation of Android that is compatible with third-party apps written by developers. Devices that are "Android compatible" may participate in the Android ecosystem, including Google Play; devices that don't meet the compatibility requirements exist outside that ecosystem.
In other words, the Android Compatibility Program is how we separate "Android compatible devices" from devices that merely run derivatives of the source code. We welcome all uses of the Android source code, but only Android compatible devices -- as defined and tested by the Android Compatibility Program -- may participate in the Android ecosystem.
How can I contribute to Android?
There are a number of ways you can contribute to Android. You can report bugs, write apps for Android, or contribute source code to the Android Open-Source Project.
There are some limits on the kinds of code contributions we are willing or able to accept. For instance, someone might want to contribute an alternative application API, such as a full C++-based environment. We would decline that contribution, since Android is focused on applications that run in the Dalvik VM. Alternatively, we won't accept contributions such as GPL or LGPL libraries that are incompatible with our licensing goals.
We encourage those interested in contributing source code to contact us via the AOSP Community page prior to beginning any work. You can find more information on this topic at the Getting Involved page.
How do I become an Android committer?
The Android Open Source Project doesn't really have a notion of a "committer". All contributions -- including those authored by Google employees -- go through a web-based system known as "gerrit" that's part of the Android engineering process. This system works in tandem with the git source code management system to cleanly manage source code contributions.
Once submitted, changes need to be accepted by a designated Approver. Approvers are typically Google employees, but the same approvers are responsible for all submissions, regardless of origin.
You can find more information on this topic at the Submitting Patches page.
Compatibility
What does "compatibility" mean?
We define an "Android compatible" device as one that can run any application written by third-party developers using the Android SDK and NDK. We use this as a filter to separate devices that can participate in the Android app ecosystem, and those that cannot. Devices that are properly compatible can seek approval to use the Android trademark. Devices that are not compatible are merely derived from the Android source code and may not use the Android trademark.
In other words, compatibility is a prerequisite to participate in the Android apps ecosystem. Anyone is welcome to use the Android source code, but if the device isn't compatible, it's not considered part of the Android ecosystem.
What is the role of Google Play in compatibility?
Devices that are Android compatible may seek to license the Google Play client software. This allows them to become part of the Android app ecosystem, by allowing users to download developers' apps from a catalog shared by all compatible devices. This option isn't available to devices that aren't compatible.
What kinds of devices can be Android compatible?
The Android software can be ported to a lot of different kinds of devices, including some on which third-party apps won't run properly. The Android Compatibility Definition Document (CDD) spells out the specific device configurations that will be considered compatible.
For example, though the Android source code could be ported to run on a phone that doesn't have a camera, the CDD requires that in order to be compatible, all phones must have a camera. This allows developers to rely on a consistent set of capabilities when writing their apps.
The CDD will evolve over time to reflect market realities. For instance, the 1.6 CDD only allows cell phones, but the 2.1 CDD allows devices to omit telephony hardware, allowing for non-phone devices such as tablet-style music players to be compatible. As we make these changes, we will also augment Google Play to allow developers to retain control over where their apps are available. To continue the telephony example, an app that manages SMS text messages would not be useful on a media player, so Google Play allows the developer to restrict that app exclusively to phone devices.
If my device is compatible, does it automatically have access to Google Play and branding?
Google Play is a service operated by Google. Achieving compatibility is a prerequisite for obtaining access to the Google Play software and branding. Device manufacturers should contact Google to obtain access to Google Play.
If I am not a manufacturer, how can I get Google Play?
Google Play is only licensed to handset manufacturers shipping devices. For questions about specific cases, contact [email protected].
How can I get access to the Google apps for Android, such as Maps?
The Google apps for Android, such as YouTube, Google Maps and Navigation, Gmail, and so on are Google properties that are not part of Android, and are licensed separately. Contact [email protected] for inquiries related to those apps.
Is compatibility mandatory?
No. The Android Compatibility Program is optional. Since the Android source code is open, anyone can use it to build any kind of device. However, if a manufacturer wishes to use the Android name with their product, or wants access to Google Play, they must first demonstrate that the device is compatible.
How much does compatibility certification cost?
There is no cost to obtain Android compatibility for a device. The Compatibility Test Suite is open-source and available to anyone to use to test a device.
How long does compatibility take?
The process is automated. The Compatibility Test Suite generates a report that can be provided to Google to verify compatibility. Eventually we intend to provide self-service tools to upload these reports to a public database.
Who determines what will be part of the compatibility definition?
Since Google is responsible for the overall direction of Android as a platform and product, Google maintains the Compatibility Definition Document for each release. We draft the CDD for a new Android version in consultation with a number of OEMs, who provide input on its contents.
How long will each Android version be supported for new devices?
Since Android's code is open-source, we can't prevent someone from using an old version to launch a device. Instead, Google chooses not to license the Google Play client software for use on versions that are considered obsolete. This allows anyone to continue to ship old versions of Android, but those devices won't use the Android name and will exist outside the Android apps ecosystem, just as if they were non-compatible.
Can a device have a different user interface and still be compatible?
The Android Compatibility Program focuses on whether a device can run third-party applications. The user interface components shipped with a device (such as home screen, dialer, color scheme, and so on) does not generally have much effect on third-party apps. As such, device builders are free to customize the user interface as much as they like. The Compatibility Definition Document does restrict the degree to which OEMs may alter the system user interface for areas that do impact third-party apps.
When are compatibility definitions released for new Android versions?
Our goal is to release new versions of Android Compatibility Definition Documents (CDDs) once the corresponding Android platform version has converged enough to permit it. While we can't release a final draft of a CDD for an Android software version before the first flagship device ships with that software, final CDDs will always be released after the first device. However, wherever practical we will make draft versions of CDDs available.
How are device manufacturers' compatibility claims validated?
There is no validation process for Android device compatibility. However, if the device is to include Google Play, Google will typically validate the device for compatibility before agreeing to license the Google Play client software.
What happens if a device that claims compatibility is later found to have compatibility problems?
Typically, Google's relationships with Google Play licensees allow us to ask them to release updated system images that fix the problems.
Compatibility Test Suite
What is the purpose of the CTS?
The Compatibility Test Suite is a tool used by device manufacturers to help ensure their devices are compatible, and to report test results for validations. The CTS is intended to be run frequently by OEMs throughout the engineering process to catch compatibility issues early.
What kinds of things does the CTS test?
The CTS currently tests that all of the supported Android strong-typed APIs are present and behave correctly. It also tests other non-API system behaviors such as application lifecycle and performance. We plan to add support in future CTS versions to test "soft" APIs such as Intents as well.
Will the CTS reports be made public?
Yes. While not currently implemented, Google intends to provide web-based self-service tools for OEMs to publish CTS reports so that they can be viewed by anyone. CTS reports can be shared as widely as manufacturers prefer.
How is the CTS licensed?
The CTS is licensed under the same Apache Software License 2.0 that the bulk of Android uses.
Does the CTS accept contributions?
Yes please! The Android Open-Source Project accepts contributions to improve the CTS in the same way as for any other component. In fact, improving the coverage and quality of the CTS test cases is one of the best ways to help out Android.
Can anyone use the CTS on existing devices?
The Compatibility Definition Document requires that compatible devices implement the 'adb' debugging utility. This means that any compatible device -- including ones available at retail -- must be able to run the CTS tests.
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SOURCE
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INITIAL RELEASE 10/22/2013 @ 5:54 am
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InsomniaAOSP v1.0
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Standard Core gapps
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WORK IN PROGRESS ALL MAINTAINERS COLLABORATE IN GIVING CREDITS
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Android Open Source Project
CodeKill13
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Github
Flar
Peter Poelman
itsme
Stericson
JesusFreke
CyanogenMOD
AOKP
PacROM
Rootbox
Evervolv
ParanoidAndroid
slimroms
Team-Hydra -Device Trees-Kernel
Team Horizon
The mikmik
AndroidSpin
Android Police
VanirAOSP
CodefireXexperiment
albinoman887
TheMuppets
Htc
Samsung
TheBr0ken
snuzzo
T-Macgnolia
ljjehl
Saif Kotwal
pr0xy man1Ac
Djwuh
ammikam
!I am not responsible for anything that happens to you or your device as a result of flashing this rom. If you decide to install this rom then you've taken responsibility for any risks involved !!
reserrrrved
Nice to see another 4.3.1 rom for our sensation
Keep the good work, will flash it tommorow
Sent from my HTC Sensation using XDA Premium 4 mobile app
Looks good shall test in the morning , thanks
Sent from my HTCSensation using Tapatalk
Tried it already from DK's thread on other forum.
There are issues with languages, not everything is translated to russian for instance.
Also there are plenty of CM ringtones, why is that?
WiFi hotspot is not working, cannot even detect an access point.
Launcher has weird wallpaper alingment, that doesn't fit at very left or right...
All these are minor issues to polish in the future.
Oh, why there's a theme engine, is it a part of AOSP now or a bonus from CM?
I'm glad see another pure (or maybe not so much) AOSP ROM.
Since there's no new SuperXE ROMs we welcome the new effort with a big smile on our never well shaved faces.
Noobel said:
Tried it already from DK's thread on other forum.
There are issues with languages, not everything is translated to russian for instance.
Also there are plenty of CM ringtones, why is that?
WiFi hotspot is not working, cannot even detect an access point.
Launcher has weird wallpaper alingment, that doesn't fit at very left or right...
All these are minor issues to polish in the future.
Oh, why there's a theme engine, is it a part of AOSP now or a bonus from CM?
I'm glad see another pure (or maybe not so much) AOSP ROM.
Since there's no new SuperXE ROMs we welcome the new effort with a big smile on our never well shaved faces.
Click to expand...
Click to collapse
hahahah..I agree with this " our never well shaved faces".. New ROM to play with....Good job
Nice to see it's playing again. Don't let our Senny dead.
oooo another AOSP for my Sensation! Bring it on! Thank you!!
---------- Post added at 04:35 AM ---------- Previous post was at 04:34 AM ----------
Any listing of what is working and what is not?
Good work, i'll try it
anyone got any feedback on this one?
Sage said:
anyone got any feedback on this one?
Click to expand...
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Yes, +1, feedback is important for the rom cooker
Is this really pure AOSP without any mods?
I mean "stock" android 4.3.1 ?
Just for the record that I am not running this rom anymore and the bugs I noticed and know of are:
Quit hours not working
Clock Widget settings gives a FC
Setting the navigation bar in Insomnia setting will FC the system UI and can't be recovered and need a factory reset
Browser and the Mail-App have a screen glitches.
I saw this InsomniaAOSP purity test!

Multiple Suggestions

First of all I want to applaud the integrity of the team working on OmniRom and for standing for software freedom. As the only GPL ROM on the phone, I believe it will reach a certain prominence once critical mass of functionality is achieved. I have some suggestions that I was hoping to get feedback for from the Devs here.
1- What is the possibility for devising an in-place upgrade system that works across future OS version upgrades for major changes in AOSP? (something akin the upgrade systems of current GNU/Linux systems)
2- Incorporating apps from the guardianproject (.info) a privacy and security oriented group that make secure messaging apps and TOR for Android. That will be our anwser to the so called secure chat of CM.
3- Cooperation with the largest FOSS software repo F-Droid and perhaps including it as a default app repo option for OmniRom.
4- Now this is a big one, but as a distro that prizes Software Freedom and the GPL above all else you are in a unique position to be a demo showcase for incorporating the major app frameworks being ported to Android like Qt and Gnome. Arranging with the devs from KDE and Gnome to make this a reality would be a major milestone for the FOSS movement's efforts to bring free software in an environment that is being increasingly closed off like what Google is doing with their absorption of features in proprietary apps and the treachery of the CM turncloaks.
Casual observer here. I don't think it's accurate to call it a GPL ROM given how many non-free drivers are required to get working WiFi and so on. OmniROM encourages GPL as a way of keeping the community honest but I don't think it's set in stone.
1. upgrades on Android don't happen in same way as GNu/Linux: it's always a fresh install. CM already does this, or you can use recovery mode.
2. good idea! more generally, system wide proxy settings which would allow all traffic to go through Tor. Tor is one part of remaining anonymous, the browser needs to be locked down for example. Guardian Project say that their companion browser, Or web, doesn't work on Android 4.4, and they might stop developing it. There are other Android techniques for anonymity e.g. xprivacy.
3. F-Droid builds and signs apps, it's hard to see room for cooperation. It will soon have ability to install apps silently if part of a ROM. They dropped their Android.mk; looks like time to bring it back, maybe with package name change option.
4. Qt was announced on day one at the BBQ!

Native vs Cross Platform

Hi everyone. I know that it's not a new subject, but I think it's a good subject to discuss about. It's the first question for any developer who wants to start a new project as everyday we can see new frameworks and languages comming up for development. After years of development now when I want to start a new project think about it again. It will be great if any one who has any experience can share it here. Because it's the experiences and times that show us if a decision was a good one or not. We can write about different parameters we considered to start a project, challenges and the results. Please feel free to add any other item you think is important to consider.
I start by myself:
Subject: A Network Communication App
Long/Short term consideration: Long term
Target platforms considered at start: android, windows
Target platforms implemented: after 2 years, android, windows, linux, (ios just newly started)
Framework: Qt5 (a cross platform framework)
Challenges: We used a crossplatform framework but as you know any OS has it's considerations and styles for development. Also different frameworks have different capacities for handling these features. In this project one of the challenges we had was the way android handles services and activities. We had to separate our UI from the logic controllers completely and implement a way to communicate between these separated processes. Also we had to implement the OS based features separately for each OS like notifications and alarms. Fortunately Qt let you use native codes for these specific features. For example you can use native java codes for showing a notification or playing system native sounds and alarms.
Pros: We implemented our UI just once and used it for all platforms. Also we implemented network and controller threads once and used them for all platforms. In this way if we need any change in our protocols or UI, we just develop them once. So we have one development team for all of them.
Result: Cross Platform with Qt was a good decision at that time for that project. Specially for a small team like what we had, because after you implement the base of a project like this you have to support it for a long time and add features to it. If we were using native codes, now we had to have separated teams for developing new features and supporting it.
It's great to read about other people stories. So Please let us know about them.
Thanks
Native vs. Cross-Platform
Native apps are developed only for a specific platform. These apps are formed in a language cooperative with the platform. Apple, for instance, prefers Objective C and Swift for iOS while Google supports Java for Android. Using these satisfactory languages, developers can create safer use of the inherent features of these platforms. A native app developed for Android will not function on iOS and vice versa.
Cross-platform apps are cooperative with various platforms. Due to the market share of Android and iOS, most cross-platform apps are confined to these two operating systems. These apps are produced in HTML and CSS since these official web technologies are platform-independent. Several cross-platform application development tools enable developers to create these apps with little trouble.

Topping Engine - Middleware for developing android and ios applications. One layout one code for both platforms.

I have recently been developing a middleware library that helps you to develop mobile applications, faster and easier than before. Finally it is live at https://topping.dev . This project started in 2012 to reduce time developing applications on android and ios platforms by creating a topping layer on mobile operating systems. All you need to know is how Android layout XML works and basic Lua or Kotlin knowledge. After developing it from time to time, I decided to make it open source. The project is in beta stage but most of the functions work. With the help of the open source community, I hope it will expand and grow and become the best of its kind. Also there are WPF and Web proof of concepts at github. http://github.com/topping-dev

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