Random activity when button pressed

I would like to make a game, if i press play button, random level (activity) will open. I got code for this: https://stackoverflow.com/a/29579373/13101103 This is working, but i would like to edit, example, all levels have 2 different answer, answer1 is fail, answer2 is pass the level, if user pass level1, and in level2 fail, than go back to mainactivity, and if start again, then the passed levels will not show again.

Example: There are 5 levels, user start random level, example level3, it passed, go to next random level, example level2, it pass, go to next... level4, it failed, go back to mainactivity, user start again, but the already passed levels will not show, only unpassed... example start level3... if passed then go to level1....

How can i edit this code for my solution? Can somebody give me some tips? Because in this if i go back to mainactivity and start again, then it start with all levels... I tried to edit, but i'm stucked and not works...

Plus i would like to save progress when user leave the app. In sharedpreferences how can i save the passed levels (arraylist)....?

MainActivity:

enter code here

Button level1Button = findViewById(R.id.level1Button);
    level1Button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // We are creating a list, which will store the activities that haven't been opened yet
            ArrayList<Class> activityList = new ArrayList<>();
            activityList.add(Level1Activity.class);
            activityList.add(Level2Activity.class);
            activityList.add(Level3Activity.class);
            activityList.add(Level4Activity.class);
            activityList.add(Level5Activity.class);

            Random generator = new Random();
            int number = generator.nextInt(5) + 1;

            Class activity = null;

            // Here, we are checking to see what the output of the random was
            switch(number) {
                case 1:
                    activity = Level1Activity.class;
                    // We are adding the number of the activity to the list
                    activityList.remove(Level1Activity.class);
                    break;
                case 2:
                    activity = Level2Activity.class;
                    activityList.remove(Level2Activity.class);
                    break;
                case 3:
                    activity = Level3Activity.class;
                    activityList.remove(Level3Activity.class);
                    break;
                case 4:
                    activity = Level4Activity.class;
                    activityList.remove(Level4Activity.class);
                    break;
                default:
                    activity = Level5Activity.class;
                    activityList.remove(Level5Activity.class);
                    break;
            }
            // We use intents to start activities
            Intent intent = new Intent(getBaseContext(), activity);
            // `intent.putExtra(...)` is used to pass on extra information to the next activity
            intent.putExtra("ACTIVITY_LIST", activityList);
            startActivity(intent);
        }
    });

Level1Activity:

enter code here
failbutton1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v){
            ArrayList<Class> activityList = new ArrayList<>();
            activityList.add(Level1Activity.class);
            Bundle extras = getIntent().getExtras();
            activityList = (ArrayList<Class>) extras.get("ACTIVITY_LIST");


            //Class activity = null;


            Intent intent = new Intent(Level1Activity.this, Main2Activity.class);
            intent.putExtra("ACTIVITY_LIST", activityList);
            startActivity(intent);
        }
    });

    buttonlevel1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            ArrayList<Class> activityList = new ArrayList<>();
            Bundle extras = getIntent().getExtras();
            activityList = (ArrayList<Class>) extras.get("ACTIVITY_LIST");

            if(activityList.size() == 0) {
                // Do something when after all activities have been opened
                //startActivity(new Intent(Level1Activity.this, Main2Activity.class));

                //Intent intent = new Intent(Level1Activity.this, Main2Activity.class);
                //intent.putExtra("ACTIVITY_LIST", activityList);
                //startActivity(intent);
            } else {
                // Now, the random number is generated between 1 and however many
                // activities we have remaining
                Random generator = new Random();
                int number = generator.nextInt(activityList.size()) + 1;

                Class activity = null;

                // Here, we are checking to see what the output of the random was
                switch(number) {
                    case 1:
                        // We will open the first remaining activity of the list
                        activity = activityList.get(0);
                        // We will now remove that activity from the list
                        activityList.remove(0);
                        break;
                    case 2:
                        // We will open the second remaining activity of the list
                        activity = activityList.get(1);
                        activityList.remove(1);
                        break;
                    case 3:
                        // We will open the third remaining activity of the list
                        activity = activityList.get(2);
                        activityList.remove(2);
                        break;
                    case 4:
                        // We will open the fourth remaining activity of the list
                        activity = activityList.get(3);
                        activityList.remove(3);
                        break;
                    default:
                        // We will open the fifth remaining activity of the list
                        activity = activityList.get(4);
                        activityList.remove(4);
                        break;
                }

                // Note: in the above, we might not have 3 remaining activities, for example,
                // but it doesn't matter because that case wouldn't be called anyway,
                // as we have already decided that the number would be between 1 and the number of
                // activities left.


                // Starting the activity, and passing on the remaining number of activities
                // to the next one that is opened
                Intent intent = new Intent(getBaseContext(), activity);
                intent.putExtra("ACTIVITY_LIST", activityList);
                startActivity(intent);
            }
        }
    });

level2, level3.... is same just different id-s