How do you pass value through multiple activities in Android using intents?

Question

The project that I'm working on right now currently has 3 screens. Registration page, Login page and Homepage. After you register, you are taken back to the login page then from the login page to the homepage. I can use intents to pass the username from the login page to the home page but I don't know how to pass the String value (user type) from the registration page to the homepage. It seems like the intent only works when you push the button, that's why I can pass the value from login page to homepage when I press the button that takes me to the homepage.

Answer 1

From the top of my head I recall two ways:

• On button Click, when starting new activity:

public void nextFormPage(View v) {

Intent form_conclusion = new Intent(this, YOURCLASS.class); //define which class to go next

form_conclusion.putExtra("TAG", value);//passes the values to the next activity

startActivity(form_conclusion);                           //start the new activity

finish();

}

• Use sharedpreferences to store the value, and read it when needed

Documentation

• Write

  SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
  SharedPreferences.Editor editor = sharedPref.edit();
  editor.putInt(getString(R.string.saved_high_score_key), newHighScore);
  editor.commit();
  

• Read

  SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
  int defaultValue = getResources().getInteger(R.integer.saved_high_score_default_key);
  int highScore = sharedPref.getInt(getString(R.string.saved_high_score_key), defaultValue);