Page 197 - MDP2022-2

import github.com.st235.lib_expandablebottombar.ExpandableBottomBar;

public class MainActivity extends AppCompatActivity {

@BindView(R.id.bottom_bar)
ExpandableBottomBar bottomBar;

@BindView(R.id.main_pager)
ViewPager2 mPager;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this, this);

FragmentStateAdapter pagerAdapter = new ScreenSlidePagerAdapter(this);

mPager.setAdapter(pagerAdapter);
mPager.setPageTransformer(new ZoomOutPageTransformer());
mPager.setUserInputEnabled(false);

bottomBar.setOnItemSelectedListener((view, menuItem, aBoolean) -> {
switch (menuItem.getId()) {
case R.id.home:
mPager.setCurrentItem(0);
break;
case R.id.list:
mPager.setCurrentItem(1);
break;
case R.id.setting:
mPager.setCurrentItem(2);
break;
}

return null;
});
}

@Override
public void onBackPressed() {
if (mPager.getCurrentItem() == 0) {
super.onBackPressed();
} else {
mPager.setCurrentItem(mPager.getCurrentItem() - 1);