Android直接执行shell命令

public void shellExec() {
        Runtime mRuntime = Runtime.getRuntime();
        try {
            //Process中封装了返回的结果和执行错误的结果
            Process mProcess = mRuntime.exec("adb version");
            BufferedReader mReader = new BufferedReader(new InputStreamReader(mProcess.getInputStream()));
            StringBuffer mRespBuff = new StringBuffer();
            char[] buff = new char[1024];
            int ch = 0;
            while ((ch = mReader.read(buff)) != -1) {
                mRespBuff.append(buff, 0, ch);
            }
            mReader.close();
            System.out.print(mRespBuff.toString());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }