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Steve Perlman, a close friend of Rubin, brought him ,000 in cash in an envelope, and shortly thereafter wired an undisclosed amount as seed funding.
Perlman refused a stake in the company, and has stated "I did it because I believed in the thing, and I wanted to help Andy." At Google, the team led by Rubin developed a mobile device platform powered by the Linux kernel.
Google later changed its Android specification documents to state that "Touchscreens will be supported", although "the Product was designed with the presence of discrete physical buttons as an assumption, therefore a touchscreen cannot completely replace physical buttons".
On November 5, 2007, the Open Handset Alliance, a consortium of technology companies including Google, device manufacturers such as HTC, Motorola and Samsung, wireless carriers such as Sprint and T-Mobile, and chipset makers such as Qualcomm and Texas Instruments, unveiled itself, with a goal to develop "the first truly open and comprehensive platform for mobile devices".
This status bar can be "pulled" down to reveal a notification screen where apps display important information or updates.
Beginning with Android 4.1 "Jelly Bean", "expandable notifications" allow the user to tap an icon on the notification in order for it to expand and display more information and possible app actions right from the notification.
Google marketed the platform to handset makers and carriers on the promise of providing a flexible, upgradeable system.
Rubin had difficulty attracting investors early on, and Android was facing eviction from its office space.
A report from The Information in January 2017 stated that Google is expanding its low-cost Android One program into the United States, although The Verge notes that the company will presumably not produce the actual devices itself.
Android's default user interface is mainly based on direct manipulation, using touch inputs that loosely correspond to real-world actions, like swiping, tapping, pinching, and reverse pinching to manipulate on-screen objects, along with a virtual keyboard.
including a debugger, software libraries, a handset emulator based on QEMU, documentation, sample code, and tutorials.
Initially, Google's supported integrated development environment (IDE) was Eclipse using the Android Development Tools (ADT) plugin; in December 2014, Google released Android Studio, based on Intelli J IDEA, as its primary IDE for Android application development.