Android 系统获取 CPU 位数信息

系统获取 CPU 位数

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

编码如下

public static boolean isCPU64(){
boolean result = false;
String mProcessor = null;
List<String > 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;
}