@Override
 public void onFocusChange(View v, boolean hasFocus) {
   if (hasFocus && mNavigationBar.isShown()) {
     mNavigationBar.hide();
   } else if (!hasFocus && !mNavigationBar.isShown()) {
     mNavigationBar.show();
   }
 }
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_round_tab);
    ButterKnife.bind(this);

    mNavigationBar
        .setDisplayBackButton(true)
        .setBackButtonImageResource(R.drawable.ic_chevron_left_white_24dp)
        .setBackButtonText("Back")
        .setOnBackButtonClickListener(
            new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                onBackPressed();
              }
            })
        .addItem(0, "Settings", ActivityCompat.getDrawable(this, R.drawable.ic_settings_white_24dp))
        .addItem(1, "More", ActivityCompat.getDrawable(this, R.drawable.ic_more_vert_white_24dp))
        .setOnMenuItemClickListener(
            new NavigationBar.OnMenuItemClickListener() {
              @Override
              public void onMenuItemClick(int id) {
                Toast.makeText(getApplicationContext(), "" + id, Toast.LENGTH_SHORT).show();
              }
            })
        .setTabs(new String[] {"music", "video", "games"})
        .setOnTabCheckedListener(
            new NavigationBar.OnTabCheckedListener() {
              @Override
              public void onTabChecked(int position) {
                Toast.makeText(
                        getApplicationContext(),
                        "Tab " + position + " is checked",
                        Toast.LENGTH_SHORT)
                    .show();
              }
            })
        .bindViewPager(mViewPager);

    mFragmentList.add(TabFragment.newInstance(TAB_NANES[0]));
    mFragmentList.add(TabFragment.newInstance(TAB_NANES[1]));
    mFragmentList.add(TabFragment.newInstance(TAB_NANES[2]));

    mViewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
    mViewPager.setAdapter(mViewPagerAdapter);

    mSearchView.setImeOption(EditorInfo.IME_ACTION_SEARCH);
    mSearchView.setOnEditorActionListener(mOnEditorActionListener);

    mSearchView.setOnFocusChangeListener(mOnFocusChangeListener);
    mSearchView.setButtonTextColor(BG_COLOR);
    mSearchView.setHint("Search");
    mSearchView.setHintTextColor(0xFF8E8E93);
    mSearchView.setButtonText("Cancel");
    mSearchView.setStyle(SearchView.Style.ROUND);
  }