Passing enum or object through an intent (the best solution)

Question

I have an activity that when started needs access to two different ArrayLists. Both Lists are different Objects I have created myself.

Basically I need a way to pa

Answer 1

I like simple.

• The Fred activity has two modes -- HAPPY and SAD.
• Create a static IntentFactory that creates your Intent for you. Pass it the Mode you want.
• The IntentFactory uses the name of the Mode class as the name of the extra.
• The IntentFactory converts the Mode to a String using name()
• Upon entry into onCreate use this info to convert back to a Mode.

• You could use ordinal() and Mode.values() as well. I like strings because I can see them in the debugger.

  public class Fred extends Activity {
  
      public static enum Mode {
          HAPPY,
          SAD,
          ;
      }
  
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.betting);
          Intent intent = getIntent();
          Mode mode = Mode.valueOf(getIntent().getStringExtra(Mode.class.getName()));
          Toast.makeText(this, "mode="+mode.toString(), Toast.LENGTH_LONG).show();
      }
  
      public static Intent IntentFactory(Context context, Mode mode){
          Intent intent = new Intent();
          intent.setClass(context,Fred.class);
          intent.putExtra(Mode.class.getName(),mode.name());
  
          return intent;
      }
  }