How to use androidx.viewpager.widget

  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev) {
    try {
      return super.onInterceptTouchEvent(ev);
    } catch (IllegalArgumentException e) {
      return false;
    }
  }
}

@Override
public void onPageScrollStateChanged(int state) {
  mScrollState = state;
  if (mViewPagerPageChangeListener != null) {
    mViewPagerPageChangeListener.onPageScrollStateChanged(state);
  }
}

@Override
protected void onSettingsChanged() {
  // Applying settings from toolbar menu, see BaseExampleActivity
  pager.getAdapter().notifyDataSetChanged();
}

private void createIndicators() {
  removeAllViews();
  PagerAdapter adapter = mViewpager.getAdapter();
  int count;
  if (adapter == null || (count = adapter.getCount()) <= 0) {
    return;
  }
  createIndicators(count, mViewpager.getCurrentItem());
}

private void init(Context context) {
  super.removeOnPageChangeListener(onPageChangeListener);
  super.addOnPageChangeListener(onPageChangeListener);
}

@Override public void onPageSelected(int position) {
  if (mViewpager.getAdapter() == null
      || mViewpager.getAdapter().getCount() <= 0) {
    return;
  }
  internalPageSelected(position);
  mLastPosition = position;
}

@Override
public void onSelected(int index, int old) {
  if (mViewPager != null) {
    mViewPager.setCurrentItem(index, false);
  }
}

public int getRealCount() {
  return mAdapter.getCount();
}

@Override
public void onPageSelected(int position) {
  for (OnPageChangeListener listener : pageChangeListenerList)
    listener.onPageSelected(position);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
  if (this.enabled) {
    return super.onTouchEvent(event);
  }
  return false;
}

@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
  for (OnPageChangeListener listener : pageChangeListenerList)
    listener.onPageScrolled(position, positionOffset, positionOffsetPixels);
}

@Override public void restoreState(Parcelable bundle, ClassLoader classLoader) {
  mAdapter.restoreState(bundle, classLoader);
}

@Override public Parcelable saveState() {
  return mAdapter.saveState();
}

@Override
protected void onSettingsChanged() {
  // Applying settings from toolbar menu, see BaseExampleActivity
  pager.getAdapter().notifyDataSetChanged();
}

  @Override
  public void onClick(View v) {
    for (int i = 0; i < mTabStrip.getChildCount(); i++) {
      if (v == mTabStrip.getChildAt(i)) {
        mViewPager.setCurrentItem(i);
        return;
      }
    }
  }
}

@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
  if (this.enabled) {
    return super.onInterceptTouchEvent(event);
  }
  return false;
}

  @Override
  public void onPageScrollStateChanged(int state) {
    for (OnPageChangeListener listener : pageChangeListenerList)
      listener.onPageScrollStateChanged(state);
  }
};

@Override
protected void onSettingsChanged() {
  // Applying settings from toolbar menu, see BaseExampleActivity
  viewPager.getAdapter().notifyDataSetChanged();
}

@Override
public void onPageScrollStateChanged(int state) {
  mScrollState = state;
  if (mViewPagerPageChangeListener != null) {
    mViewPagerPageChangeListener.onPageScrollStateChanged(state);
  }
}

@Override
protected void onSettingsChanged() {
  // Applying settings from toolbar menu, see BaseExampleActivity
  viewPager.getAdapter().notifyDataSetChanged();
}