When an Android-powered device is in accessory mode, the connected accessory acts as the USB host (powers the bus and enumerates devices) and the Android-powered device acts as the USB device. The Android 3.1 platform (also backported to Android 2.3.4) introduces Android Open Accessory support, which allows external USB hardware (an Android USB accessory) to interact with an Android-powered device in a special 'accessory' mode. Code written in C/ C++ can be compiled to ARM, or x86 native code (or their 64-bit variants) using the Android Native Development Kit (NDK).Īndroid Open Accessory Development Kit Fastboot is a protocol used for flashing filesystems. The Android Debug Bridge (ADB) is a tool to run commands on a connected Android device. The Android SDK Platform Tools are a separately downloadable subset of the full SDK, consisting of command-line tools such as adb and fastboot. The Android software development kit (SDK) includes a comprehensive set of development tools.

1.1 Android Open Accessory Development Kit.

The official Android app distribution mechanism to end users is Google Play it also allows staged gradual app release, as well as distribution of pre-release app versions to testers. Third party tools, development environments, and language support have also continued to evolve and expand since the initial SDK was released in 2008. Some programming languages and tools allow cross-platform app support (i.e. All non- Java virtual machine (JVM) languages, such as Go, JavaScript, C, C++ or assembly, need the help of JVM language code, that may be supplied by tools, likely with restricted API support.

Google states that 'Android apps can be written using Kotlin, Java, and C++ languages' using the Android software development kit (SDK), while using other languages is also possible. The Nexus 4, part of the Google Nexus series, a line of 'developer-friendly' devices Īndroid software development is the process by which applications are created for devices running the Android operating system.

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