Linux commands in Android apps

    Permission to modify a file is 777 for example:

/** executes the Linux command and returns execution results.  
          * * public static String exec (string[] args) {string result = ' ";  
          Processbuilder Processbuilder = new Processbuilder (args);  
          Process process = NULL;  
          InputStream erris = null;  
          InputStream Inis = null;  
              try {bytearrayoutputstream BAOs = new Bytearrayoutputstream ();  
              int read =-1;  
              Process = Processbuilder.start ();  
              Erris = Process.geterrorstream ();  
              while (read = Erris.read ())!=-1) {baos.write (read);  
              } baos.write (' n ');  
              Inis = Process.getinputstream ();  
              while (read = Inis.read ())!=-1) {baos.write (read);  
              } byte[] data = Baos.tobytearray ();  
          result = new String (data); catch (IOException e) {E.printstacKtrace ();  
          catch (Exception e) {e.printstacktrace ();  
                  Finally {try {if (Erris!= null) {erris.close ();  
                  } if (Inis!= null) {inis.close ();  
              } catch (IOException e) {e.printstacktrace ();  
              } if (process!= null) {Process.destroy ();  
      } return result; }  

Here we call the above function where we need to:

string[] args = {"chmod", "777", "(File Path)"};  
 exec (args);