private SharedPreferences mSharedPreferences;
    private ClingManager mClingManager;

    @Override
    protected void onResume() {
        super.onResume();

        if (mSharedPreferences.getBoolean(START_TUTORIAL_KEY, true)
                && (mClingManager == null || !mClingManager.isStarted()))

        mClingManager = new ClingManager(this);

        // When no Target is set, Target.NONE is used
        mClingManager.addCling(new Cling.Builder(this)
                .setTitle("Welcome to this app")
                .setContent("This application is meant to be the best app you will ever try on android.")
                .build());

        mClingManager.addCling(new Cling.Builder(this)
                .setTitle(R.string.drawer_tutorial_title)
                .setContent(R.string.drawer_tutorial_message)
                .setMessageBackground(getResources().getColor(R.color.teal))
                .setTarget(new ViewTarget(this, R.id.drawer))
                .build());

        mClingManager.addCling(new Cling.Builder(this)
                .setTitle("Here is another feature")
                .setTitleTextAppearance(R.style.textAppearanceTitleNice)
                .setContent("Look how amazing this feature is, blablabla blablabla bla bla.")
                .setContentTextAppearance(R.style.textAppearanceContentNice)
                .setTarget(new ViewTarget(mFeatureView))
                .setClingColor(getColor(R.color.cling))
                .setMessageBackground(getColor(R.color.red))
                .build());

        mClingManager.setCallbacks(new ClingManager.Callbacks() {
            @Override
            public boolean onClingClick(int position) {
                // We return false to tell to cling manager that we didn't handle this,
                // so it can perform the default action (ie. showing the next Cling).
                // This is the default value returned by super.onClingClick(position), so
                // in a real project, we would just leave this method unoverriden.
                return false;
            }

            @Override
            public void onClingShow(int position) {
                Toast.makeText(MyActivity.this, "Cling #" + position + " is shown", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onClingHide(int position) {
                Toast.makeText(MyActivity.this, "Cling #" + position + " is hidden", Toast.LENGTH_SHORT).show();

                // Last Cling has been shown, tutorial is ended.
                if (position == 2) {
                    mSharedPreferences.edit()
                            .putBoolean(START_TUTORIAL_KEY, false)
                            .apply();

                    mClingManager = null;
                }
            }
        });

        mClingManager.start();
    }