使用TabLayout和ViewPager在Fragment中未调用OnResume() [英] OnResume() not called in Fragment using tabLayout and ViewPager
问题描述
我正在使用tabLayout
开发应用.
我有一个问题:当我尝试重新激活Fragment
时,未调用方法OnResume
.
I've a problem: When I try to reactivate a Fragment
, the method OnResume
is non called.
这是我的活动:
private void init() {
fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Nuovo Ticket", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
final PagerAdapter adapter = new PagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
}
我这样使用FragmentStatePagerAdapter:
I use a FragmentStatePagerAdapter like this:
public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new LavorazioneFragment();
case 1:
return new PendingFragment();
case 2:
return new StoriciFragment();
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}
当我从TAB3
片段(最后一个)中重新激活TAB1
片段时,将调用OnResume
方法.但是,例如
When i reactivate the TAB1
Fragment from TAB3
Fragment (the last one), the OnResume
Method is called. But, for example,
当我尝试从第二个选项卡中重新激活第一个选项卡时,从未调用过.
When I try to reactivate the first tab from the second, never called.
推荐答案
我已经解决了这个问题. 我使用setUserVisibleHint(boolean isVisibileToUser)代替onResume().像这样:
I've solved the problem. I use setUserVisibleHint(boolean isVisibileToUser) instead onResume(). Like this:
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if(isVisibleToUser) {
init();
} else {
}
}
谢谢大家!
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