android Shell指令

1：添加sd快捷方式

String oldPath = file.getPath();
Slog.e("m_tag", "oldPath=" + oldPath);
String cmd = "ln -s " + oldPath + " /storage/hdd";
String[] cmds = {"su", "-c", cmd};
Slog.e("m_tag", "cmd=" + cmd);
execShellCmd(cmds);

oldPath 是sd的路径

/storage/hdd 是你须要映射的路径

具体方法为：

private String execShellCmd(String[] cmds) {
   Runtime runtime = Runtime.getRuntime();
   try {
      java.lang.Process p = runtime.exec(cmds);
      if (p.waitFor() != 0) {
         Slog.e(TAG, "exit value = " + p.exitValue());
      }
      BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
      StringBuilder sb = new StringBuilder();
      String line = null;
      while ((line = br.readLine()) != null) {
         sb.append(line + "-");
      }
      Slog.e(TAG, "serial port back data:" + sb.toString());
      return sb.toString();
   } catch (Exception e) {
      Slog.e(TAG, "execShellCmd error:" + e.toString());
      e.printStackTrace();
   }
   return "null";
}

执行完后，经过路径/storage/hdd 也可找到sd卡

 

二：向串口写数据

String[] cmds = new String[3];
cmd[0] = "sh";
cmd[1] = "-c";

cmd[2] = "echo -en \'\\x11\' > /dev/ttyS3";

x11 你须要向串口写的数据

/dev/ttyS3 端口号

一样调用 execShellCmd(cmds )便可