android-recyclerview

问题 Problem: Cannot display a context menu showing a "delete" option" when longclicking on an item within a recyclerview Result expected: see image below I'm almost there, but I'm missing something to make the contextMenu displayed on a longClick. Here is what I put in the viewHolder. I don't know what I should add and where to display the context menu in the onLongClick event. I skipped some lines of code and kept the ones relevant to my question. Thanks a lot for your assistance, My interface

问题 I have several items in a RecyclerView and each item has a long value saved with it. I'm using FastAdapter as the adapter for my RecyclerView . Suppose there are 7 items in the RecyclerView with the long values: 11122 , 12321 , -98811 , 8870 , -88009 , 3398 , and -22113 . So, what I want to do is, I want to filter the items based on the above given long values using this logic: if (l <= 1000) { // show items with long value <=1000 } else if (l > 1000) { // show items with long value >1000 } I

问题 I have several items in a RecyclerView and each item has a long value saved with it. I'm using FastAdapter as the adapter for my RecyclerView . Suppose there are 7 items in the RecyclerView with the long values: 11122 , 12321 , -98811 , 8870 , -88009 , 3398 , and -22113 . So, what I want to do is, I want to filter the items based on the above given long values using this logic: if (l <= 1000) { // show items with long value <=1000 } else if (l > 1000) { // show items with long value >1000 } I

问题 I am trying to create a layout with a list of items, where the last item is a button to add a new item of the "standard" type. It should be something like Google Keep lists, with a permanent "add" item at the end of the list. Google Keep list example I have tried two ways to achieve it. The first one is very simple, but I find a problem. The second one is not that simple, and the performance is worse. In addition, I think with the second way I am using RecyclerView in a way that is not

问题 I have a RecyclerView with data from local JSON in CardView . I need to implement on selected items when one or some item clicked(change background the item selected or highlight) (like edit in Line App ) but without Button or longpress . But I don't want to use StateListDrawable or (using XML) because I have some JSON data which need to process later. I need a state in my Activity like a boolean value or something to save every item which I clicked but I don't have any solution again. I have

问题 I am using NestedScrollView with ViewPager. NestedScrollView has a LinearLayout inside with some TextViews, TabLayout and ViewPager at the end. TextViews occupy most of the space and for ViewPager left a little space. ViewPager using two fragments, in one of them there is a few TextViews and ImageViews and in another fragment there is a RecyclerView. When I set ViewPager's height to WRAP_CONTENT it takes only space that left and I can't scroll to see the rest of the first fragment, and the

问题 In this I am able to get the details of my contacts. But not using RecyclerView. It is using ListView. It is using SimpleCursorAdapter. I don't know how to use SimpleCursorAdapter in RecyclerView. I know how to use RecyclerView with constants String to display. But in this I want to retrieve data using Contacts DB. Please Help me I am new to android. I don't know how to implement this. Thanks in advance public class MainActivity extends AppCompatActivity { SimpleCursorAdapter mAdapter;

问题 I have multiple RecyclerView inside a ScrollView and RecyclerView load data from the server. RecyclerView working very slow when I scroll down it lagging. How can I solve it? <Scrollview> <LinearLayout> <Recyclerview> <Recyclerview> </LinearLayout> </Scrollview> 回答1: Usually, when a RecyclerView has scrolling performance issues, it's because a) You're doing too much work in onBindView, which is called every time a new item comes on screen. b) The views you're displaying reference objects

问题 I have create the recycerview and this recycerview display the Person image ,person name and + button when i have press + button change the button image like true.and after recycerview bottom one button this button click all data show the next activity.. My Adapter public class BuildCustomAdapter extends RecyclerView.Adapter<BuildCustomAdapter.MyViewHolder> implements Filterable { private List<People> peopleList; private List<People> peopleListCopy; private ItemFilter mFilter = new ItemFilter

问题 I'm trying to have a scrolling MapView inside of a RecyclerView, therefore I'm setting requestDisallowInterceptTouchEvent() before and after the TouchEvent. The odd thing is: this does work if I set it in the dispatchTouchEvent() method, but it doesn't work if I do the same in the onTouchEvent() method. Can somebody explain why I cannot set this in onTouchEvent() ? Working: public class WorkingScrollableListItemMapView extends MapView { // constructors @Override public boolean