[英]OnResume() not called in Fragment using tabLayout and ViewPager
i'm developing an app using tabLayout
.我正在使用
tabLayout
开发应用程序。
I've a problem: When I try to reactivate a Fragment
, the method OnResume
is non called.我有一个问题:当我尝试重新激活
Fragment
, OnResume
调用OnResume
方法。
This is my activity: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);
}
I use a FragmentStatePagerAdapter like this:我使用这样的 FragmentStatePagerAdapter:
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;
}
} }
When i reactivate the TAB1
Fragment from TAB3
Fragment (the last one), the OnResume
Method is called.当我从
TAB3
片段(最后一个)重新激活TAB1
片段时,将OnResume
方法。 But, for example,但是,例如,
When I try to reactivate the first tab from the second, never called.当我尝试从第二个选项卡重新激活第一个选项卡时,从未调用过。
I've solved the problem.我已经解决了这个问题。 I use setUserVisibleHint(boolean isVisibileToUser) instead onResume().
我使用 setUserVisibleHint(boolean isVisibileToUser) 代替 onResume()。 Like this:
像这样:
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if(isVisibleToUser) {
init();
} else {
}
}
Thank you all!谢谢你们!
The accepted answer did not work for me.接受的答案对我不起作用。 However, I found a solution to the problem.
但是,我找到了解决问题的方法。
Just initialise your FragmentStatePagerAdapter with the following constructor:只需使用以下构造函数初始化您的 FragmentStatePagerAdapter:
public MyPagerAdapter(FragmentManager fm, int behaviour) {
super(fm, behaviour);
}
like this :像这样 :
MyPagerAdapter myPagerAdapter = new MyPagerAdapter(getChildFragmentManager(), FragmentStatePagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
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