ViewPager

public class GuideViewPager extends PagerAdapter {
    private static final String TAG = GuideViewPager.class.getSimpleName();

    private static final int PAGE_COUNT = 3;

    private Context mContext;

    public GuideViewPager(Context context){
        mContext = context;
    }

    @Override
    public int getCount() {
        return PAGE_COUNT;
    }

    @Override
    public boolean isViewFromObject(@NonNull View view, @NonNull Object obj) {
        return view == obj;
    }

    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, int position) {
        LayoutInflater inflater = LayoutInflater.from(mContext);
        View view = null;
        switch (position){
            case 0 :
                view = inflater.inflate(R.layout.view_guide_0, null);
                container.addView(view, position);
                return view;
            case 1 :
                view = inflater.inflate(R.layout.view_guide_1, null);
                container.addView(view, position);
                return view;
            case 2 :
                view = inflater.inflate(R.layout.view_guide_2, null);
                container.addView(view, position);
                return view;
        }
        return null;
    }

    @Override
    public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
        View view = (View) object;
        container.removeView(view);
    }

    @Override
    public int getItemPosition(@NonNull Object object) {
        return super.getItemPosition(object);
    }

}

public class GuideActivity extends BaseActivity {
    private static final String TAG =GuideActivity.class.getSimpleName();

    private Unbinder mUnbinder;

    @BindView(R.id.viewpager_guide)
    public ViewPager mViewPager;
    @BindView(R.id.btn_start)
    public Button mBtnStart;

    private Bundle mBundle = null;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_guide);
        mUnbinder = ButterKnife.bind(this);

        GuideViewPager guideViewPager = new GuideViewPager(this);
        mViewPager.setAdapter(guideViewPager);
    }

    @Override
    public void callRequestServer(String params) {

    }

    @OnClick(R.id.btn_start)
    void onButtonOkClick(){
        PreferenceUtil.getInstance(mBaseActivity).setBoolean(Constant.PreferenceKeys.GUIDE, true);
        Intent i = new Intent(this, MainActivity.class);
        startActivity(i);
        finish();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(mUnbinder != null) mUnbinder.unbind();
    }

}