Question

I need to remount android file system as read write instead of read only. I know how to do it through command prompt and also how to go about it for application development.

But I am into tweaking the android source code and there if I use

Process proc=Runtime.getRuntime.exec("su"); 

it doesnot work. Therefore I need to use android.os.process object for the same and I am stuck here can anybody help me with it.

Answer 1

1. Try this code to get superuser access (you’ll need a rooted phone with superuser installed):

   try {
       // Perform su to get root privledges
       Process p = Runtime.getRuntime().exec("su");
   
       DataOutputStream os = new DataOutputStream(p.getOutputStream());
   
       os.writeBytes("<..... here you may write commands ....>\n");
   
       // Close the terminal
       os.writeBytes("exit\n");
       os.flush();
   } catch (IOException e) {
       toastMessage("not root");
   }
   

2. Once you have superuser access, you may start adbd listening on some TCP port using:

   setprop service.adb.tcp.port 5555
   adbd &
   setprop service.adb.tcp.port -1
   

3. Open a TCP connection to the selected port and issue remount command.