public class MainActivity extends AppCompatActivity {

    private ActionBar actionbar;
    private Tab tabOne;
    private Tab tabTwo;
    private Fragment register = new RegisterFragment();
    private Fragment browse = new BrowseFragment();
    private Button saveButton, randButton;
    private EditText editTitle,editUser,editPass;
    private RadioGroup radioGroup;
    private RadioButton radioButton;


    private void link()
    {
        saveButton = findViewById(R.id.buttonSave);
        randButton = findViewById(R.id.buttonRand);
        editTitle = findViewById(R.id.acc_title);
        editUser = findViewById(R.id.acc_username);
        editPass = findViewById(R.id.password);
        radioGroup = findViewById(R.id.rGroup);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        link();

        actionbar = getSupportActionBar();
        actionbar.show();
        actionbar.setNavigationMode(NAVIGATION_MODE_TABS);

        tabOne = actionbar.newTab().setText(R.string.new_account);
        tabTwo = actionbar.newTab().setText(R.string.browse);

        tabOne.setTabListener(new TabAction(register));
        tabTwo.setTabListener(new TabAction(browse));

        actionbar.addTab(tabOne);
        actionbar.addTab(tabTwo);

        saveButtonHandler();
        randomButtonHandler();

    }

    private void saveButtonHandler()
    {

    }

    private void randomButtonHandler()
    {

    }

    private String randomPassword()
    {
        Character[] characters = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
                             'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',
                             '!','@','#','$','%','^','&','*','(',')','_','+','1','2','3','4','5','6','7','8','9','0'};

        List<Character> characterList = new ArrayList<>(Arrays.asList(characters));
        Collections.shuffle(characterList);
        Random rand = new Random();
        String result ="";
        for(int i = 0;i<9;i++)
        {
            int count = rand.nextInt(characterList.size());
            result = result + characterList.get(count).toString();
        }

        return result;
    }

    class TabAction implements ActionBar.TabListener {

        Fragment f;

        public TabAction(Fragment f) {
            this.f = f;
        }

        @Override
        public void onTabSelected(Tab tab, FragmentTransaction ft) {
            ft.replace(R.id.frame, f);
        }

        @Override
        public void onTabUnselected(Tab tab, FragmentTransaction ft) {
            ft.remove(f);
        }

        @Override
        public void onTabReselected(Tab tab, FragmentTransaction ft) {

        }
    }