Android系统使用的是linux内核，那么我们可以在程序中去调用cat /proc/meminfo和cat /proc/cpuino来查看内存和CPU的情况，下面是程序：
public class CpuSpeed extends Activity {
/** Called when the activity is first created. */
private TextView cpuInfo;
private TextView memoryInfo;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
cpuInfo = (TextView) findViewById(R.id.cpuinfo);
cpuInfo.setText(getCPUinfo());
memoryInfo = (TextView) findViewById(R.id.memoryinfo);
memoryInfo.setText(getMemoryInfo());
}
private String getMemoryInfo() {
ProcessBuilder cmd;
String result = new String();
try {
String[] args = { "/system/bin/cat", "/proc/meminfo" };
cmd = new ProcessBuilder(args);
Process process = cmd.start();
InputStream in = process.getInputStream();
byte[] re = new byte[1024];
while (in.read(re) != -1) {
System.out.println(new String(re));
result = result + new String(re);
}
in.close();
} catch (IOException ex) {
ex.printStackTrace();
}
return result;
}
private String getCPUinfo() {
ProcessBuilder cmd;
String result = "";
try {
String[] args = { "/system/bin/cat", "/proc/cpuinfo" };
cmd = new ProcessBuilder(args);
Process process = cmd.start();
InputStream in = process.getInputStream();
byte[] re = new byte[1024];
while (in.read(re) != -1) {
System.out.println(new String(re));
result = result + new String(re);
}
in.close();
} catch (IOException ex) {
ex.printStackTrace();
}
return result;
}
}
其实核心无非就是ProcessBuilder的运用，去启动命令行去读操作系统。
String[] args = {"/system/bin/cat", "/proc/cpuinfo"};
cmd = new ProcessBuilder(args);
Process process = cmd.start();
InputStream in = process.getInputStream();
然后再IO输入流读入就可以了。
