Question

I would like to know how I would save my variables in bundles and then get the data back with the onResume() method.

Answer 1

You need to override onSaveInstanceState:

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    super.onSaveInstanceState(savedInstanceState);
    savedInstanceState.putString("key", "Hello World");
}

To restore data, override onRestoreInstanceState (your onCreate will also receive this Bundle):

@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    String myString = savedInstanceState.getString("key");
}