recycler-adapter

问题 Recyclerview has 4 items i.e; textView1, textView2, EditText1 and Checkbox1. Recyclerview has got 24 rows as well. EditText is invisible on initial stage thenit will be visible only when the corresponding checkbox checked by the user. EditText accepts only numbers. The app is working fine so far this much. Now I need to get value of all EditTexts and need to display it on another Textview which is not in the part of Recyclerview? Recyclerview Screenshot- Output Link Code Samples. ExamFragment

问题 in brief: I have a list of users ID and I want to iterate over database and find profiles of those users and put them on the list. But I have a problem as follows: final List<Friend> friendsProfiles = new ArrayList<>(); for (final FriendId friendId : friendIds) { mUserRef.child(friendId).addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(@NonNull DataSnapshot dataSnapshot) { // Get the friend profile Friend friend = dataSnapshot.getValue(Friend.class)

问题 Is there a way to get the ViewHolder of specific Item of recyclerview base on given position only? Something like getViewHolder(position); . public MyViewHolder getViewHolder(int position){ MyViewHolder holder = null; /** Find ViewHolder here... If Found initialize the holder.. holder = ? **/ return holder; } This function is in my Adapter class, I'm looking for a way to get the ViewHolder of an Item so I can change the value of one of my view of my custom item eg. holder.setText("Hello World

问题 I have four type of different data with different view type like the below image . but that is not a problem problem is the data will came from different api. My question is how to combine them in a single adapter because i need to use lazy loading .so I cant load whole data at a time so i need to call the different type of api like : goallist api , aprisaList api , post Api etc. When user scroll. any one can give me a idea with example . How can i handle that ? Also when user will scroll it

问题 I have been making an app that uses a RecyclerView but its not showing any thing..why contents of the recycler view have not been showing up.my codes are bellow item_contact.xml <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" android:paddingBottom="10dp" android:paddingTop="10dp"> <TextView android:id="@+id/contact_name" android:layout_width="0dp" android:layout

问题 I wanted to know how to load more data in recylcer view using firestore. Query query = FirebaseFirestore.getInstance() .collection("ie").limit(5); adapter=new InterviewAdapter(this,query); recyclerView.setAdapter(adapter); recyclerView.setLayoutManager(new LinearLayoutManager(this)); Adapter class looks like this: public class InterviewAdapter extends FireStoreAdapter<InterviewAdapter.ViewHolder> { public interface OnInterviewSelectedListener { void onInterviewSelected(DocumentSnapshot

问题 I want to retain the state of the RecyclerView's selected item whenever the screen orientation changes, but whenever I change the orientation, the selected item does not retain its state. So I save the position of the selected item and on orientation change in onResume() . I get the position and by using the RecyclerView's getChildAt() method I try to get the View of that item, but it returns null. I am in serious troubles, please help. @Override protected void onCreate(Bundle

问题 Can the RecyclerView.ViewHolder be used not as a inner class? Are there any issues on doing so? I have searched around but havent found any documentation on it! 回答1: Actually, I think a ViewHolder should either be a static nested class (mind the static!) or a top-level class (which actually will be no different, just the class name will contains the outer class name followed by a $ and then the inner class name). Why do I think so? When the ViewHolder is a non-static inner class of the

问题 What i am trying to do is getting images from gallery and camera and placing it in an recyclerview. Now main parts comes after image is now placedd in the recyclerview , but can anyone just tell me how can i get back these images shown in the recyclerview back to the mainActivity only when i click my upload button. Thank you in advance. My Main Activity. package www.welkinfort.com.pphc; import android.app.DatePickerDialog; import android.content.Intent; import android.database.Cursor; import

问题 How can I limit the number of items displayed by the RecyclerView ? I can limit the amount inserted it if I override getChildCount , but that causes it to only insert that number and then stop. I want it to keep inserting/scrolling, but only display X number of items. (Note: The height of each item can differ, so it's important that the limit is based on quantity rather than some hard coded value.) 回答1: Inside your Recyclerview's adapter class; private final int limit = 10; @Override public