android ndk Support for 64-bit x86

Support for 64-bit x86

On this page

1. Overview
2. Standalone Toolchain
3. Compatibilty

The Android NDK supports the x86_64 ABI. This ABI allows native code to run on Android-based devices using CPUs that support the 64-bit x86 instruction set.

Overview概述

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To generate 64-bit machine code for x86, add x86_64 to theAPP_ABI definition in your Application.mk file. For example:

APP_ABI := x86_64

For more information on how to specify values for APP_ABI, see Application.mk.

The build system places libraries generated for the x86_64 ABI into $PROJECT/libs/x86_64/ on your host machine, where $PROJECT is the root directory of your project. It also embeds them in your APK, under/lib/x86_64/.

The Android package manager extracts提取 these libraries when installing your APK on a compatible 64-bit, x86-powered device, placing them under your app's private data directory.

In the Google Play store, the server filters applications so that a consumer sees only the native libraries that run on the CPU powering his or her device.

Standalone Toolchain

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You can use the 64-bit x86 toolchain in standalone独立 mode with the NDK. For more information about doing so, seeStandalone Toolchain, under the "Advanced method" section.

Compatibility

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The NDK provides native versions of Android APIs for 64-bit x86 machine code starting from Android 5.0 (Android API level 21). If your project files target an older API level, but include x86_64 as a targeted platform, the NDK build script automatically selects the right set of native platform headers and libraries for you.