MainActivity.java

btn_load.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE);
                String name = sharedPreferences.getString("name","default_value");
                String email = sharedPreferences.getString("email","default_value");
                txt_name.setText(name);
                txt_email.setText(email);
            }
        });
    }