MainActivity.java

  btn_save.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //getdata from edittext and store in corresponding string file
                str_email = ed_email.getText().toString();
                str_name = ed_name.getText().toString();
                SharedPreferences sharedPreferences = getSharedPreferences("my_sharedpreference_file_name",Context.MODE_PRIVATE);
                //we need editor to edit created shared preference file
                SharedPreferences.Editor editor = sharedPreferences.edit();
                editor.putString("name",str_name);
                editor.putString("email",str_email);
                editor.apply();
            }
        });