When a new version of Android appears, so do the drivers of each of the components forming (eg audio, sensors or wireless) devices , so they can continue to operate without problem after the upgrade. Sometimes this can be a problem if the hardware manufacturer does not release or adapted. For line Nexus this does not happen, because as we know, have secured updates (not for life, of course) and Google is responsible for introducing these new drivers and binaries OTA’s .
It is normal to think that these compilations will always include the latest versions, however Google can continue to receive updates for these binaries by the manufacturers without This will mean that the use and distribute an OTA again for all users. The example can be seen in the small jump of Android 4.4.2 to 4.4.3, where have been fixed many bugs and errors but it took a few months to arrive.
To try to minimize this problem Google has created a public channel versions “Preview” binary , where any developer or cook can have access to these latest versions. Therefore, this does not directly affect the end user, but those who use the Android AOSP branch and sometimes find inconsistencies and problems with hardware drivers for Nexus.
Via |. AndroidPolice | Web Preview Nexus Binaries | AndroidDevs
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