Is Android a 32-bit system or a 64-bit system?

Transferred from: http://www.cnblogs.com/pengwang/archive/2013/03/11/2954496.html

The computer CPU is divided into 32 bits and 64 bits, which we all know. With this long Android phone, there was a sudden question: how many CPUs does the Android OS run on?

Android applications run on Dalvik VMS, like the JVM, which is 32-bit, which is not related to the underlying physical machine. Of course, the Andriod application with native binaries, whose native files are inseparable from the underlying architecture. The most common is the ARM-32-bit architecture, as well as the devices running on the x86,mips architecture.

Overall, Android phones are now running on 32-bit CPUs, and ARM released its first 64-bit version at the end of 2012, Cortex-a50, which is expected to be available in the market in 2014.

Can be verified by the following experiments

Export arm binaries from the phone, such as some files in/system/bin,/SYSTEM/BIN/DALVIKVM, using the command file DALVIKVM to view the file types, the results are as follows:

Dalvikvm:elf 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), stripped

Continue to view the dynamic link library file/system/lib/libandroid_runtime.so, using the file command, the results are as follows:

Libandroid_runtime.so:ELF 32-bit LSB Shared Object, ARM, version 1 (SYSV), dynamically linked, stripped

File types are 32-bit elf format

RELATED Links: Http://android.stackexchange.com/questions/36291/is-android-a-32-bit-or-64-bit-os

Is Android a 32-bit system or a 64-bit system?