Вы можете просто передать и получить значение, как это.
// Creating and initializing an Intent object
Intent intent = new Intent(this, NextActivity.class);
// Attach the key value pair using putExtra to this intent
String pizza = "Margherita";
intent.putExtra("PIZZA_NAME", pizza);
// Start the activity
startActivity(intent);
// Get the current intent
Intent intent = getIntent();
// Get the attached extras from the intent
// We should use the same key as we used to attach the data.
String pizza = intent.getStringExtra("PIZZA_NAME");