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- package com.emato.ich.utils;
- import android.util.Log;
- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.InputStreamReader;
- public class BaseUtils {
- public static String getMac() {
- // start the ls command running
- //String[] args = new String[]{"sh", "-c", command};
- Runtime runtime = Runtime.getRuntime();
- String command = "cat /sys/class/net/eth0/address";
- Process proc = null; //这句话就是shell与高级语言间的调用
- try {
- proc = runtime.exec(command);
- //如果有参数的话可以用另外一个被重载的exec方法
- //实际上这样执行时启动了一个子进程,它没有父进程的控制台
- //也就看不到输出,所以我们需要用输出流来得到shell执行后的输出
- InputStream inputstream = proc.getInputStream();
- InputStreamReader inputstreamreader = new InputStreamReader(inputstream);
- BufferedReader bufferedreader = new BufferedReader(inputstreamreader);
- // read the ls output
- String line = "";
- StringBuilder sb = new StringBuilder(line);
- while ((line = bufferedreader.readLine()) != null) {
- //System.out.println(line);
- sb.append(line);
- sb.append('\n');
- }
- return sb.toString();
- } catch (IOException e) {
- return null;
- }
- //tv.setText(sb.toString());
- //使用exec执行不会等执行成功以后才返回,它会立即返回
- //所以在某些情况下是很要命的(比如复制文件的时候)
- //使用wairFor()可以等待命令执行完成以后才返回
- // try {
- // if (proc.waitFor() != 0) {
- // System.err.println("exit value = " + proc.exitValue());
- // }
- // } catch (InterruptedException e) {
- // System.err.println(e);
- // }
- // return null;
- }
- }
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