android-recyclerview

问题 I built a recyclerview that gets data from Google places api and displays it. I didn't notice that the photos are being cached every time I open the app. According to google, that is illegal so I need to get rid of caching. I initially thought it was because i used the Picasso library but i added code for that, and now I'm stuck. I get the data from google in a bitmap then send it through to the recyclerview . I pass it through a URI creator to be able to use it with the Picasso Library and I

问题 I have the following setup for a recyclerview. Now the problem is my layout is not attached with the recyclerview adapter, meaning it is not showing when I enter the layout name in the recyclerview adapter class. fragment_service.xml <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content"> <android.support.v4.view.ViewPager android:id="@+id/viewPager" android:layout_width="match_parent" android:layout_height="150dp" android:layout

问题 I'm trying to use asink task to download the data from the background firebase and use them to create a non-proprietary firebase recyclerview. However, lags after the postexecute remain the same. I do not know if what I did is right. What am I doing wrong? public class FriendFragmentFollow extends Fragment { FriendHoldAdapter3 adapter; RecyclerView recyclerView; ArrayList<FriendItem> username; ArrayList<String> uid, url; DatabaseReference mDatabase; @Override public View onCreateView

问题 I have objects in my firebase database called userForm . Each userForm have an instance variable called isPassedInspection that is either set to true or false in my firebase. users can send Form object to my firebase, therefore I manually set isPassedInspection to true once I consider the form they send as "approved" by my standards. I would like that my RecyclerView only create CardViews for userForm that it's isPassedInspection is true, otherwise, don't create a CardView (return null). This

问题 I have set of icons that I need to display in a RecyclerView arranged in a grid, and make that grid scroll horizontally. Normally I would use GridLayoutManager for something like this, but my requirements are preventing me from doing this. Namely, not only that the items have to be arranged in a grid, but they also need to be added to the grid row by row and not column by column (this is how GridLayoutManager does it). So for example, if the grid is is 3x3 and I have 4 items, they shouldn't

问题 I want my espresso test to scroll a RecyclerView down until it's sees a certain view and clicks it. Therefore I am using RecyclerViewActions : onView(withId(R.id.recycler)).perform( RecyclerViewActions.scrollTo<RecyclerView.ViewHolder>( hasDescendant(withText(R.string.title_item_x)) ) ) Thread.sleep(2000) onView(withId(R.id.recycler)).perform( RecyclerViewActions.actionOnItem<RecyclerView.ViewHolder>( hasDescendant(withText(R.string.title_item_x)), click() ) ) The test scrolls the

问题 Hi i'm trying to use listadapter and diffcallback in my app. Somehow the view not update at all, when i do something. When i put some log inside my "areItemsTheSame" and "areContentsTheSame" inside callback, it's not called at all. Here is my mainActivity class MainActivity : AppCompatActivity() { private lateinit var recyclerView: RecyclerView private lateinit var viewAdapter: TodoAdapter private lateinit var viewManager: RecyclerView.LayoutManager private lateinit var viewModel :

问题 This project uses Navigation Drawer , RecyclerView and an Interface to detect the clicks on RecyclerView items. Problem is when I click on the items nothing happens. I tried to open an activity that works fine. so i think there's no problem with the interface. I found some similar questions how to open a different fragment on recyclerview OnClick but none of them helped to solve this specific problem. What is it I am doing wrong? HomeFragment.java public class HomeFragment extends Fragment

问题 I am learning RecyclerView and stuck in activity. I have a bottomNavigationView and a frame layout above the bottomNavigationView I want to show a RecyclerView on that FrameLayout. How can I do that? There is no error in my program and i don't know why its not showing the RecyclerView. This is the xml <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width

问题 i am getting Fatal Exception: java.lang.NullPointerException at android.support.v7.widget.RecyclerView.computeVerticalScrollRange(SourceFile:1654) at android.view.View.onDrawScrollBars(View.java:12160) at android.view.View.draw(View.java:14742) at android.support.v7.widget.RecyclerView.draw(SourceFile:3097) at android.view.View.getDisplayList(View.java:13588) at android.view.View.getDisplayList(View.java:13635) at android.view.View.draw(View.java:14430) at android.view.ViewGroup.drawChild