public void onClick(View v) {
        if (v.getId()==R.id.saveId){

            String userName = nameEditText.getText().toString();
            String userPass = passEditText.getText().toString();
            userName = userName+" ";

            File file = null;
            FileOutputStream fileOutputStream = null;
            try {

                file = getFilesDir(); //for get file directory
                fileOutputStream = openFileOutput("Mydata.txt", Context.MODE_PRIVATE);
                fileOutputStream.write(userName.getBytes());
                fileOutputStream.write(userPass.getBytes());

            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }


            Toast.makeText(this, "Data Save Successfully"+file+" /Mydata.txt", Toast.LENGTH_SHORT).show();
        }else if (v.getId()==R.id.secondId){
            Intent intent = new Intent(MainActivity.this,SecondActivity.class);
            startActivity(intent);
            Toast.makeText(this, "Next Activity", Toast.LENGTH_SHORT).show();
        }

    }