问如何将所有过滤器和标签的logcat输出存储在SdCard上的一个文件中？

EN

    public String ReadFromCMD(String[] strCmdArgs)
    {

     ProcessBuilder cmd;
     String result="";
     try
     {
          cmd = new ProcessBuilder(strCmdArgs);
          Process process = cmd.start();
          InputStream in = process.getInputStream();

          BufferedReader reader = new BufferedReader(
                new InputStreamReader(process.getInputStream()));
            int read;
            char[] buffer = new char[4096];
            StringBuffer output = new StringBuffer();

            process.waitFor();

            while ((read = reader.read(buffer)) > 0) 
            {
                output.append(buffer, 0, read);
            }
            reader.close();
            result = output.toString();
            in.close();

     } catch(Exception ex){ ex.printStackTrace(); }

     return result;
}

String[] args_Logs_Save = "/system/bin/logcat -v time -d -b radio -b events -b main -b system".split(" ");
ReadFromCMD(args_Logs_Save);