android-recyclerview | 易学教程

How to extend multiple classes in adapter?

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I want to implement sections in my list. I have a list of tasks. List has a custom adapter which extends recyclerview swipe adapter as I have implemented swipe gesture to the recyclerview. So now tasks list is shown together with completed and pending tasks. Each list item has a check box which shows task is completed or pending. If check box is checked then task is completed and vise versa. Now I want to make two sections in this with header. One For completed tasks and another for pending tasks. So completed tasks should be shown inside completed section and vise versa. Also if the task is

Cardview's data are changed while srolling RecyclerView

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问题 I'm a beginning android developer. I have made an app with CardView, but when I scrolling RecyclerView, it's changing its content. Please, help me) Video: http://sendvid.com/60ui8cay My code: RecyclerViewActivity.java: import android.app.ActionBar; import android.app.Activity; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.CardView; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView;

How to search a list of Objects that are displayed in a RecyclerView?

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问题 I am currently trying to implement a SearchView, but the displayed search results change only for the first Search, everything else I enter into SearchView is ignored. Here is my Code for Searching in my MainActivity.java : testList = Arrays.asList(new TestItem("aw"), new TestItem("aa"), new TestItem("w")); @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.test_menu, menu); SearchView searchView = (SearchView) menu.findItem(R.id.action_search)

Update SeekBar at particular position within a RecyclerView

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问题 I am creating an application for downloading songs. In my application, there is a RecyclerView with a list of songs and with every song there is a SeekBar below that shows the download progress. When I hit the download button, it works fine but it updates the wrong SeekBar . I want to update a particular SeekBar at a particular position. Here is my adapter for the RecyclerView : @Override public SongListAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { itemViewLayout =

RecyclerView get View by position

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问题 I have a RecyclerView and each CardView contains a TextView and an ImageView . Whenever I click an item, I want to set the image visibility to VISIBLE and to set the previous clicked item image's visibility to INVISIBLE. This is my Adapter class : public class CategoryAdapter extends RecyclerView.Adapter<CategoryAdapter.ViewHolder>{ private Context context; private List<Category> lista; private LayoutInflater layoutInflater; private IncomeCategoryActivity activity; private static final int

How to use shared preferences in RecyclerView.Adapter?

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问题 How to use shared preferences in RecyclerView.Adapter..? i have used shared preference value in RecyclerView.Adapter..but nothing is saving in shared preference..where exactly i have to use shared preference ..?in RecyclerView.Adapter or activity..? public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> { private ImageLoader imageLoader; private Context context; private String gd; public static final String SHARED_PREF_NAME = "myloginapp"; //We will use this to store

implementing “add to favourite” mechanism in RecyclerView

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问题 i have a recyclerView with two sections regular and Favourites and for populating my RecyclerView i have List<Object> my object class : public class Object { String id,channelName; boolean isFavorite; } now i want to put the values which have isfavorite == true to top of my recyclerView inside my Favourite section but i don't know where to start or exactly what to do ? do i have to sort the List<Object> with booleans ? if anybody can give me a little hint or guidance then it'll be so helpful

How to use shared element transition between FirstFragment (including RecyclerView) and SecondFragment

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问题 I could implement shared element transition between two fragments WITHOUT RECYCLERVIEW!!! This is FirstFragment: public class FirstFragment extends Fragment { ImageView img_small; LinearLayout layout_ofc_cities; LinearLayout layout; public FirstFragment() { // Required empty public constructor } @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle

How to create this layout with a RecyclerView?

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问题 I'm trying to create a recycler view with this type of layout. The items are strings and can apear with diferent sizes, i dont know how much items there will be in each row. Can I do this with a StaggeredGridLayoutManager? The image is just a fake example, there can be more items in each row 回答1: You might wanna check out the open-source FlexboxLayout, developed by Google, especially FlexboxLayoutManager which is a layout manager for a RecyclerView . To create the layout manager with the

onClick in Expandable RecyclerView (using bignerdranch library)

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问题 In the project I'm working, I get a bunch of "Projects"(parent) with "Issues" (child). As I have to show it in a list, I used RecyclerView to do it. To achieve it I used BigNerdRanch library (https://github.com/bignerdranch/expandable-recycler-view) The problem come's that I need to click on Child to take all the information of the issue and send it to another activity. The library don't have any method to handle the child click, so I tried to implement a work around and worked (I think is ok