[英]Return to viewpager state from a new fragment
I have a layout that has a viewpager. 我有一个带有viewpager的布局。 The viewpager has 2 fragments inside it. viewpager内部有2个片段。 When I click on the second page I want a new fragment to pop up and fill the entire screen. 当我单击第二页时,我希望弹出一个新片段并填充整个屏幕。 I did this so far by using the following in the fragment B : 到目前为止,我是通过在片段B中使用以下命令来完成此操作的:
FragmentTransaction fragmentTransaction = getActivity().getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.container, new FragmentA(),"current");
fragmentTransaction.commit();
Now when I press the back button I cant get to the previous viewpager page and cannot retain its previous state. 现在,当我按下后退按钮时,我无法进入上一个Viewpager页面,并且无法保留其先前状态。 I am thrown out of the activity on back press. 我被压在后面的活动上了。 This is my implementation of OnBackPress in the main activity: 这是我在主要活动中对OnBackPress的实现:
Fragment fragment = getSupportFragmentManager().findFragmentByTag("current");
if(fragment != null)
getSupportFragmentManager().beginTransaction().remove(fragment).commit();
if(vp.getCurrentItem() == 0)
{
super.onBackPressed();
}
else
vp.setCurrentItem(0);
have to tried this, 必须尝试这个
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getActivity().onBackPressed();
}
});
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