How Do You Save Previous Activity Data In Kotlin So When You Reopen It, The Same Data Is Still There?

I'm making a quiz app and so far I've made the code for creating a question and answer in one activity which then takes you back to the main activity where a button with the text s

Solution 1:

you can use onSaveIntanceState method to save current activity data

@OverridepublicvoidonSaveInstanceState(Bundle savedInstanceState) {
  super.onSaveInstanceState(savedInstanceState);
  // Save UI state changes to the savedInstanceState.// This bundle will be passed to onCreate if the process is// killed and restarted.
  savedInstanceState.putString("activity", "my activity data");
  // etc.
}

and for retrieve data when activity resumed you have to use savedInstanceState in onRestoreInstanceState method or in onCreate method

@OverridepublicvoidonRestoreInstanceState(Bundle savedInstanceState) {
  super.onRestoreInstanceState(savedInstanceState);
  // Restore UI state from the savedInstanceState.// This bundle has also been passed to onCreate.String myString = savedInstanceState.getBoolean("activity");
}