Android设备中，通过代码执行指令

import android.util.Log;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;

public class ShellCmdUtils {

    public static String getCmdInfo(String cmd){
        Process process = null;
        DataOutputStream os = null;
        try {
            process = Runtime.getRuntime().exec("vc");
            os = new DataOutputStream(process.getOutputStream());
            os.writeBytes(cmd + "\n");
            os.writeBytes("exit\n");
            os.flush();
            int i = process.waitFor();
            Log.d("syds", "execShell "+ cmd + ":"+i);
            InputStream ins = process.getInputStream();
            BufferedReader in = new BufferedReader(new InputStreamReader(ins));
            StringBuilder buffer = new StringBuilder();
            String line = "";
            while ((line = in.readLine()) != null) {
                buffer.append(line);
            }
            String res = buffer.toString();
            Log.d("syds","execShellResult:"+ cmd + ":"+res);
            /*获取错误流*/
            InputStream errorStream = process.getErrorStream();
            BufferedReader errorBuffer = new BufferedReader(new InputStreamReader(errorStream));
            StringBuilder errorSb = new StringBuilder();
            String errorLine = "";
            while ((errorLine = errorBuffer.readLine()) != null){
                errorSb.append(errorLine);
            }
            Log.d("syds","execShellError:"+cmd + ":"+ errorSb.toString());
            return res;
        } catch (Exception e) {
            Log.d("syds", e.getMessage());
            return "";
        } finally {
            try {
                if (os != null) {
                    os.close();
                }
                process.destroy();
            } catch (Exception e) {
            }
        }
    }

}