Background introduction
The Open Handset Alliance (OHA), founded by Google, has gone through seven seasons, and the alliance has made the Android operating system more accessible to mobile developers. In a relatively short period of time after its establishment, the Android platform has developed into a mainstream smartphone and tablet operating system, and is now appearing in expanding markets such as automotive and industrial applications. Operating systems such as Apple's iOS and Microsoft's Windows CE are losing market share, and Android-based devices are replacing them. In fact, the number of downloadable and useful Android apps has grown to nearly 1.1 million (source: AppBrain January 2014).
Android-based consumer electronics users also want to be able to use their applications and device features while driving or riding. For designers who want to implement Android-based in-vehicle infotainment systems, there are many ways to do this, such as fully customizing the Android operating system and then loading it directly onto the chip platform (bare metal), or the basis of the smartphone and the car. The architecture is simple to link. This article will introduce these approaches and their advantages and disadvantages.
Car Android smart device
Recently, Google announced at the 2014 InternaTIonal Consumer Electronics Show that the Open Auto Alliance (OAA) mission is to make the Android platform suitable for cars. In addition to Google, the founding members of the Open Car Alliance include Audi, GM, Honda, Hyundai and nVidia. Other vendors are expected to join the Open Car Alliance, but the details of how the Android platform will be used in cars are still in the discussion stage. Some manufacturers, such as Kia and Renault, have loaded custom Android systems into production cars and have their own well-managed Android app library available in the car. The following table summarizes the differences between the existing features of smartphone Android and the essential features of the car Android.
Table 1: Potential requirements for car Android compared to Android smartphones.
If the Open Auto Alliance has established a common Android-based platform, existing implementations may soon work, as any new Google-approved Android operating system will undoubtedly reduce maintenance and support costs. Compatibility with earlier Android versions and in-vehicle devices will be an important feature and will be a primary concern for the Open Car Alliance. During the life of the vehicle, it is impossible for the owner to upgrade the vehicle software as frequently as the smartphone user. Google releases a new Android version approximately every nine months (Figure 1), while the Android 4.4 "KitKat" version is in the process of mass production. The various Android versions of the smartphone market have not survived for a long time. In contrast, these versions are likely to be used as built-in car configurations for a longer period of time.
Figure 1: Android version and its distribution
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