[英]android studio Viewpager OnClickListener not working
[英]Android Studio ViewPager with navigation
我有这种情况:
Fragment1
使用viewPager
,然后当单击viewPager
的子片段内的某个组件时,它会打开Fragment2
,它也使用viewPager
。
到目前为止,一切都很好。 但是,在单击后退按钮时,不会返回到Fragment1
,而是返回我的主要活动。 该应用程序使用单一活动和 Android 导航。
我已经尝试使用viewPager2
,它发生了同样的事情。
谢谢,如果有人可以帮助我。
public class Fragment1 extends AbstractNavFragment {
private Fragment1 binder;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
binder = Fragment1Binding.inflate(inflater, container, false);
return binder.getRoot();
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
binder.viewPager.setAdapter(new PageAdapterInternal(getChildFragmentManager()));
binder.viewPager.setOffscreenPageLimit(2);
binder.tabLayout.getTab().setupWithViewPager(binder.viewPager);
}
public void navigateToFragment2() {
navigate(R.id.action_Fragment1_to_Fragment2);
}
private class PageAdapterInternal extends FragmentStatePagerAdapter {
public PageAdapterInternal(@NonNull FragmentManager fm) {
super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
}
@NonNull
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new IrcSupplyPositionsFragment(IrcSupplyPositionsFragment.FragmentType.PENDING);
case 1:
return new IrcSupplyPositionsFragment(IrcSupplyPositionsFragment.FragmentType.COMPLETED);
default:
throw new IllegalStateException("Unexpected value: " + position);
}
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return translate("rotativeInventory.supply.pendingPositions");
case 1:
return translate("rotativeInventory.supply.positionsCompleted");
default:
return "";
}
}
@Override
public int getCount() {
return 2;
}
}
}
public class Fragment2 extends AbstractNavFragment {
private Fragment2 binder;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
binder = Fragment2Binding.inflate(inflater, container, false);
return binder.getRoot();
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
binder.viewPager.setAdapter(new RotativeInventorySupplyUDFragment.PageAdapterInternal(getChildFragmentManager()));
binder.viewPager.setOffscreenPageLimit(2);
binder.tabLayout.getTab().setupWithViewPager(binder.viewPager);
}
@Override
protected void doOnViewCreate() {}
private class PageAdapterInternal extends FragmentStatePagerAdapter {
public PageAdapterInternal(@NonNull FragmentManager fm) {
super(fm);
}
@NonNull
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new IrcSupplyUDFragment(IrcSupplyUDFragment.FragmentType.PENDING);
case 1:
return new IrcSupplyUDFragment(IrcSupplyUDFragment.FragmentType.COMPLETED);
default:
throw new IllegalStateException("Unexpected value: " + position);
}
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return translate("rotativeInventory.supply.pendingPositions");
case 1:
return translate("rotativeInventory.supply.positionsCompleted");
default:
return "";
}
}
@Override
public int getCount() {
return 2;
}
}
}
您必须覆盖 Activity 的onBackPressed
方法,以控制所有这些东西或为OnBackPressedDispatcher注册您的片段,当用户单击设备的后退按钮时,做出决定,例如 ==> findNavController().popBackStack()
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.