Android 系统获取 CPU 位数信息

系统获取 CPU 位数

adb shell “cat /proc/cpuinfo”

        processor       : 0
        Processor       : AArch64 Processor rev 4 (aarch64)
        model name      : AArch64 Processor rev 4 (aarch64)
        BogoMIPS        : 26.00
        Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
        CPU implementer : 0x41
        CPU architecture: 8
        CPU variant     : 0x0
        CPU part        : 0xd03
        CPU revision    : 4

Processor : AArch64 Processor rev 4 (aarch64) 可以查看位数信息,包含aarch64即为64位

编码如下

    public static boolean isCPU64(){
        boolean result = false;
        String mProcessor = null;
        List list = null;
        try {
            mProcessor = getFieldFromCpuinfo("Processor");
        } catch (IOException e) {
            e.printStackTrace();
        }

        if (mProcessor != null) {
            // D/CpuUtils: isCPU64 mProcessor = AArch64 Processor rev 4 (aarch64)
            Log.d(TAG, "isCPU64 mProcessor = " + mProcessor);
            //list =  Arrays.asList(mProcessor.split("\\s"));
            if (mProcessor.contains("aarch64")) {
                result = true;
            }
        }

        return result;
    }


    /*  cat /proc/cpuinfo

        processor       : 0
        Processor       : AArch64 Processor rev 4 (aarch64)
        model name      : AArch64 Processor rev 4 (aarch64)
        BogoMIPS        : 26.00
        Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
        CPU implementer : 0x41
        CPU architecture: 8
        CPU variant     : 0x0
        CPU part        : 0xd03
        CPU revision    : 4
    */
    public static String getFieldFromCpuinfo(String field) throws IOException {
        BufferedReader br = new BufferedReader(new FileReader("/proc/cpuinfo"));
        Pattern p = Pattern.compile(field + "\\s*:\\s*(.*)");

        try {
            String line;
            while ((line = br.readLine()) != null) {
                Matcher m = p.matcher(line);
                if (m.matches()) {
                    return m.group(1);
                }
            }
        } finally {
            br.close();
        }

        return null;
    }