android - What is the difference between the Intel x86 Atom and Atom_64 system images? -


i using android sdk manager install system image android m preview. however, noticed there 2 separate images x86 platform.

enter image description here

what differences between 2 , 1 should select 64-bit ubuntu 15.04 installation? (my cpu includes amd-v , enabled in bios, in case makes difference.)

according article

with google’s recent release of x86 64-bit android 5.0 emulator image, developers can create 64-bit apps intel atom processor-based devices.

android 32-bit vs 64-bit

many 64-bit platforms today, including solaris, aix*, hp-ux*, linux*, os x*, bsd, , ibm z/os*, use lp64 model. since android based on linux kernel, android 64-bit platforms use lp64 model.

intel 64-bit cpus have 32-bit compatibility mode. while 32-bit applications run on 64-bit processors, compiling 64-bit optimizing compiler allows them take advantage of architectural benefits of 64-bit environment.

how run 64-bit apps on emulators

create new android virtual device (avd) based on intel atom processor 64-bit system image , open avd manager in sdk manager or adt. click ‘create’ , fill fields shown in figure . 64-bit avd emulator ready run.

enter image description here

64-bit android* os

by default, 32-bit applications run without glitch on 64-bit processors, might run slower applications tuned run on 64-bit processors.

android ready 64-bit processing

one of key benefits of move 32-bit 64-bit chips largely theoretical right now: support exabytes of ram, rather mere gigabytes. way 64-bit chips handle memory can lead improved performance in tasks.

summary

android 64-bit technologies intel atom processor-based platforms can developers optimize applications now. building android applications 64-bit easy building traditional 32-bit android applications. can use official android 64-bit emulator run , debug 64-bit apps.

maybe articles can understand difference between system images.

update

google encourage use x86 emulator can see in image

enter image description here

the difference when using x86 images, uses fast, hardware-accelerated virtualization under right conditions (haxm) doesn't feel there's fat middle layer anymore.


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