API call to get processor architecture

Question

As part of my app I\'m using the NDK and was wondering if it\'s worth bundling x86 and mips binaries alongside the standard ARM binaries.

I figured the best way woul

Answer 1

termux-app uses a different approach and has an explanation:

private static String determineTermuxArchName() {
    // Note that we cannot use System.getProperty("os.arch") since that may give e.g. "aarch64"
    // while a 64-bit runtime may not be installed (like on the Samsung Galaxy S5 Neo).
    // Instead we search through the supported abi:s on the device, see:
    // http://developer.android.com/ndk/guides/abis.html
    // Note that we search for abi:s in preferred order (the ordering of the
    // Build.SUPPORTED_ABIS list) to avoid e.g. installing arm on an x86 system where arm
    // emulation is available.
    for (String androidArch : Build.SUPPORTED_ABIS) {
        switch (androidArch) {
            case "arm64-v8a": return "aarch64";
            case "armeabi-v7a": return "arm";
            case "x86_64": return "x86_64";
            case "x86": return "i686";
        }
    }
    throw new RuntimeException("Unable to determine arch from Build.SUPPORTED_ABIS =  " +
        Arrays.toString(Build.SUPPORTED_ABIS));
}

From: https://github.com/termux/termux-app/blob/master/app/src/main/java/com/termux/app/TermuxInstaller.java

Answer 2

Actually, you can get the architecture without the need for reflexion at all:

String arch = System.getProperty("os.arch");

From my tests it returned armv71 and i686.

EDIT:

On MIPS architecture, it either returns 'mips' or 'mips64'

On 64 bit ARM/Intel, it returns 'aarch64' or 'x86_64' respectively.