In early September, Google implemented changes that can reduce the download data size for each device, while maintaining a single application and associated data in the Google Market. The Google Play Developers Console now supports CPU architecture (ABI) as filter criteria for Multiple APKs. This new feature will be of great interest to developers who currently either have separate applications for each architecture, or have delayed native x86 support to avoid large APK downloads.
Many devices support multiple ABIs, for example both ARMv7 and ARMv5TE. Many x86 ABI devices can also run ARMv7 and ARMv5TE binaries. Developers should order the version codes so that the binary with best performance runs on each device. For example, order the version codes so that the x86 APK has the highest version code, followed by ARMv7, then ARMv5TE. Thus x86 binaries will be preferred for x86 devices and ARMv7 binaries preferred for ARMv7 devices.
Intel suggests using a version code with at least 8 digits. Integers that represent the supported configurations are in the higher order bits, and the version name (from android:versionName) is in the lower order bits. For example, when the application version name is 3.1.0, the recommended version code for ARMv7 ABI and an API level 11 APK would be 21100310. As another example, when the application version name is 3.1.0, version code for X86 and an API level 11 APK would be 61100310. The first digit indicates the supported ABI, the second and third digits are reserved for the API level, the fourth and fifth digits are for either screen sizes or GL texture formats (not used in these examples), and the last three digits are for the application's version number (3.1.0). Figure 1 shows two examples that are split based solely on the ABI with the same platform version (API Level), screen size, and application version.
ABI Key: 6 – x86, 2 – ARMv7, 1 – ARMv5
Figure 1. A suggested scheme for your version codes, using the first digit for the ABI, the second and third digits for the API level, the fourth and fifth digits for the minimum and maximum screen size (1-4 indicating each of the four sizes) or to denote the texture formats, and the last 3 digits for the app version.
Using this type of version code scheme for applications with large native libraries reduces the download data size for each device and ensures the optimal execution for both x86 and ARM platforms.
To make use of this new feature developers must enable Advanced Mode in the Google Play Android Developer Console which will allow Multiple APKs to be active for a single application. For specific instructions and future details regarding Multiple APK support review the Developer Publishing documentation on Google’s website. http://developer.android.com/guide/google/play/publishing/multiple-apks.html
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