我用viewpager创建了一个标签布局.一切都很好,除了我需要在特定的时刻运行一个方法.所以我需要获取片段实例并运行他们的方法.我这样创造:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
activateToolbarWithNavigationView(HomeActivity.this);
// Tabs Setup
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
final ViewPager viewPager = (ViewPager) findViewById(R.id.home_pager);
if (tabLayout != null) {
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.favorites_label_fragment)).setTag(getString(R.string.fragment_favorite_tag)));
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.air_today_label_fragment)).setTag(getString(R.string.fragment_airing_today_tag)));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
final HomePageAdapter adapter = new HomePageAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
if (viewPager != null) {
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
}
public void refreshFavorites(){
FavoritesFragment …