android-recyclerview

问题 I have a RecyclerView with several items types. It looks like this: 07/21/2017 Message 1 Message 2 Message 3 07/22/2017 Message 4 New messages header Message 5 Message 6 When new messages arrived I sort it by date and call notifyDataSetChanged() . It works well, but it automatically scroll my RecyclerView on new item(s) height. In this case I cannot use notifyItemInserted() because I don't know item position after sorting. How to force RecyclerView do not scroll after notifyDataSetChanged()

问题 I want the things in the last expandable item to be fully visible when it is clicked,Now what is happening means when I click on last item it expands down, but I manually need to scroll up again to see the the things inside the expanded item.How can the last expandable item be fully visible. I am using Recyclerview. 回答1: I have found the solution which I wanted, I used recyclerView.smoothScrollToPosition(selectedPosition); after setting the adapter. So now the things in the last expandable

问题 In my application I have first the cardview and then RecyclerView. Using my existing code I am able to scroll the whole page. But I want that I can also scroll only the card view items. Currently when I try to scroll cardview the complete layout is scrolled. My current code:- <android.support.design.widget.AppBarLayout android:id="@+id/app_bar_layout" android:layout_width="match_parent" android:layout_height="wrap_content" android:fitsSystemWindows="true" android:theme="@style/ThemeOverlay

问题 Well people I have a RecyclerView which I populate from a WebService, and I have a DataProvider class that manage the async requests. So when the data is fetched I need this DataProvider to inform the RecyclerView.Adapter that there is new data. For this I need to add a method to RecyclerView.Adapter that allow this communication. But When I create a base class (which extends RecyclerView.Adapter) with this new method in it, and then create the custom adapter it won't let me Override

问题 I am adding dynamic buttons to a layout. Each button is added one at a time, and the layout must update itself if new buttons were added based on a user's action. So the layout could have 3 buttons, or 16, or whatever, depending on the user's action. And the buttons can be added at different times. So if the user opens the app and adds a button, then leaves and returns to the app and adds another button, the old one must remain. I want my buttons to be added, one by one, into a layout like

问题 I am using a RecyclerView with ListAdapter (which uses AsyncListDiffer to calculate and animate changes when list is replaced). The problem is that if I submit() some list, then re-order that list, and submit() again, nothing happens. How do I force ListAdapter to evaluate this new list, even though it is "the same" (but order has changed)? New findings: I checked source code of submitList() and in the beggining there is a check: public void submitList(@Nullable final List<T> newList) { final

问题 I have two activities MainActivity and Addlogactivity i am updating a data in Addlogactivity which should be displayed in mainactivity recyclerview the data is not updating in database MianActivityClass : public class MainActivity extends AppCompatActivity implements LoaderManager.LoaderCallbacks<Cursor>{ RecyclerView recyclerView; Intent addDisplay; Mainrow_Adapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R

问题 I have a RecyclerView which have EditText as its list items. When i scroll the RecyclerView , the EditText loses focus when the item goes off screen. So the focus does not remain on the EditText when it comes back on the screen on scroll. I want the focus to remain on the same item. For that i also tried storing position of the item on focus and reassigning the focus in onBindViewHolder . But that slow downs the scrolling. I also tried this with ListView but there is another kind of focus

问题 I am trying to get a 2x6 (WxH) GridLayout in my Kotlin Android application. I have my xml and fragment / adapter set up for a RecyclerView but am a bit at a loss for as how to apply a GridLayout to this. How can I get my items (listview_row_enrollments.xml) to show in a grid instead of just a horizontal list? EnrollmentFragment.kt class EnrollmentsFragment : Fragment() { // TODO: Rename and change types of parameters private var mParam1: String? = null private var mParam2: String? = null

问题 I have a project that loads a list from the server. This data will eventually be stored into a database, but for now is stored in memory in a MutableLiveData. A RecyclerView's adapter is watching the data and displaying it. So far everything is working as expected, using a FAB the user can post a new entry which will go at the top of the list, on success I get a 200 and here's the main part where I'm getting lost... When I want to add a single item to a list stored in a LiveData, the observer