fragment

问题 My onListItemClick is never call when i click on item, the class is extends fragment not listfragment, because i have other view items in this fragment which is not list, so how to implement onlistitemclick in class extends fragment? class public class MainFiles extends Fragment { ArrayList<String> items; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.files, container, false); Button button_up = (Button

问题 I have 3 Fragment (Fragment Home, Fragment A, Fragment B and Fragment C). First time app run will display Fragment Home (Set in Mainactivity). From Navigation Draw Item can choose every fragment. Every selected item will display detail Fragment. I have problems to handle data and retain fragment : (1). When I select a fragment (for example Fragment A) will show the page of Fragment A. But when I rotate the device, why my fragment back to Fragment Home and not stay at current Fragment ??How to

问题 I have 3 Fragment (Fragment Home, Fragment A, Fragment B and Fragment C). First time app run will display Fragment Home (Set in Mainactivity). From Navigation Draw Item can choose every fragment. Every selected item will display detail Fragment. I have problems to handle data and retain fragment : (1). When I select a fragment (for example Fragment A) will show the page of Fragment A. But when I rotate the device, why my fragment back to Fragment Home and not stay at current Fragment ??How to

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . Improve this question I Have fragment 1, fragment 2, fragment 3 which are in the Main Activity. there is a TextView in the main Activity, how can the fragments change the text in the text view? I already did the casting (Actvity).getActivity but i don't want my app to have error when changing

问题 lets say we have two fragment and we are in second fragment then if someone press back button then we successfully go back to the previous fragment (i.e. first fragment) using backstack but the problem is that the previous fragment is restarting everything. I want to display content of previous fragment without any restarting or initializing when we press back button.Thanks in advance. 回答1: Welcome to Android Fragment Life !! As suggested by @Uuu Uuu, you need to use add() method while adding

问题 I learning kotlin, and now for me not cearly some moment. I have xml <ImageView android:id="@+id/aries" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="10dp" android:tag="1" android:onClick="clickItemHoro" android:src="@drawable/aries" /> and fragment class ChooseYourHoroscope : Fragment(){ override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { val view = inflater.inflate(R.layout.fragment

问题 I learning kotlin, and now for me not cearly some moment. I have xml <ImageView android:id="@+id/aries" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="10dp" android:tag="1" android:onClick="clickItemHoro" android:src="@drawable/aries" /> and fragment class ChooseYourHoroscope : Fragment(){ override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { val view = inflater.inflate(R.layout.fragment

问题 I have a complex navigation structure, I go from one nav graph then based on some logic, decide which nav graph to go to there. However both the nav graphs share 3 other nav graphs. See image below Currently I get a circular reference error if I try to include each nav graph in the A & B. I have also tried creating a global action, which leads to illegal argument exception since it doesn't exist on the nav graph. Please help!!! 来源： https://stackoverflow.com/questions/61083805/circular

问题 I simply want to call a Fragment method from my MainActivity. So I tried to use an Interface. public interface MyInterface { void testMethod(); } In my Fragment (TestFragment.java) I implement the interface and overrite the testMethod method. @Override public void testMethod() { Toast.makeText(getActivity(), "Test", Toast.LENGTH_LONG).show(); } but now I want to call this method from my MainActivity as soon as the onRewardedVideoCompleted get's called, but I'm not sure how to do it. I tried

问题 I am using 4 fragments inside a ViewPager ,as ViewPager load the previous and next fragment in advance ,and no lifecycle method is called when navigating between fragments. So is there any way to detect when Fragment is actually visible. Thanks in Advance. 回答1: Of course. Assuming that viewPager is your instance of the ViewPager , use: viewPager.getCurrentItem() . Within your Fragment you can check if its instance is visible to the user like so: @Override public void setUserVisibleHint