安卓会自动加载最适合该设备的.so文件吗？
安卓会自动加载最适合该设备的.so文件吗？
提问于 2011-11-14 15:35:11
我正在写一个需要一些JNI代码的应用程序。这段代码涉及浮点处理，所以我希望它尽可能快。因此，我希望支持ARM5和ARM7架构。在我的Application.mk中，它说：
APP_ABI := all..。构建过程编译ARM5、ARM7和x86的模块。我验证了所有.so文件最终都在.apk文件中。
现在的问题是:安卓会根据它运行的平台自动加载“最好的”.so文件吗？换句话说:它会在ARM5设备上加载ARM5模块，在ARM7设备上加载ARM7吗？
回答 1
Stack Overflow用户
回答已采纳
发布于 2012-02-07 23:00:28
是。
在ARMv5或ARMv6设备上，将在ARMv7设备上使用ARMv5二进制文件(APP_ABI = armeabi)，系统将看到ARMv7二进制文件可用并将使用它(APP_ABI = armeabi-v7a)
在NDK文档中，我们可以阅读：
III.2. Android Platform ABI support:
------------------------------------
The Android system knows at runtime which ABI(s) it supports. More
precisely, up to two build-specific system properties are used to
indicate:
- the 'primary' ABI for the device, corresponding to the machine
code used in the system image itself.
- an optional 'secondary' ABI, corresponding to another ABI that
is also supported by the system image.
For example, a typical ARMv5TE-based device would only define
the primary ABI as 'armeabi' and not define a secondary one.
On the other hand, a typical ARMv7-based device would define the
primary ABI to 'armeabi-v7a' and the secondary one to 'armeabi'
since it can run application native binaries generated for both
of them.
A typical x86-based device only defines a primary abi named 'x86'.页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/8118552
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