android-recyclerview

问题 I have a recyclerview having different layouts for portrait and landscape. When the activity starts, the recyclerview populates with data irrespective of the orientation. But if the orientation is changed then no data is shown. And no data is shown on consequent orientation changes. public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Log.d("CCC", "OnCreate View called"); View view = inflater.inflate(R.layout.fragment_coach_list, container, false

问题 I'll use RecyclerView for a section header I want to create section header when i insert each Date & Time data in SQLite Database I followed below links for this solution but haven't been successful Recyclerview Dynamic Sections not using any 3rd lib Add two sections in recyclerview android Please refer the below image For above image data using below code OR Section is Static : List<Company> childList = new ArrayList<>(); List<CompanySectionHeader> sectionHeaders = new ArrayList<>();

问题 I am making database app using room, mvvm, livedata . I have Prepopulated it with some data. Now i have two options either i am going to show that prepoulated data when app turns on via recyclerview or show it when i search it using SearchView inside recyclerView. The Problem is when i search for particular item, itw shows that item when i complete my word and when i try to go back either my resView back empty or it always stays on that item. i wanna try sometime realtime like: when i enter

问题 everyone, I was trying to make a music app, and for this, I Created a Horizontal RecyclerView in my HomeFragment and my horizontal RecyclerView is getting an image with artist name. But after clicking I load another Activity. In my other activity, I was trying to load SongsData from firebase in a listView with RecyclerView . But the problem is I am not getting data from Firebase and it is returning null data. I provided my code below and here is the screenshot of my Firebase database:-

问题 I'm getting a compile error after adding CardView and RecyclerView dependencies, I've checked every post but no one seems to solve this case. Error: Error:Execution failed for task ':app:processDebugManifest'. Manifest merger failed : Attribute meta-data#android.support.VERSION@value value=(25.3.1) from [com.android.support:appcompat-v7:25.3.1] AndroidManifest.xml:27:9-31 is also present at [com.android.support:cardview-v7:26.0.0-alpha1] AndroidManifest.xml:24:9-38 value=(26.0.0-alpha1).

问题 I am using recycler view with card view to show icons in my application. I am not able to figure out how to resize the app icons and increase/decrease the span count automatically depending on the screen size. Here is what I am doing to display it and the spen count is fixed to 3. RecyclerView mrv = (RecyclerView) findViewById(R.id.recyclerview_id); RecyclerViewAdapter myAdapter = new RecyclerViewAdapter(this, lsStore); mrv.setLayoutManager(new GridLayoutManager(this, 3)); mrv.setAdapter

问题 I am using recycler view with card view to show icons in my application. I am not able to figure out how to resize the app icons and increase/decrease the span count automatically depending on the screen size. Here is what I am doing to display it and the spen count is fixed to 3. RecyclerView mrv = (RecyclerView) findViewById(R.id.recyclerview_id); RecyclerViewAdapter myAdapter = new RecyclerViewAdapter(this, lsStore); mrv.setLayoutManager(new GridLayoutManager(this, 3)); mrv.setAdapter

问题 I am using recycler view with card view to show icons in my application. I am not able to figure out how to resize the app icons and increase/decrease the span count automatically depending on the screen size. Here is what I am doing to display it and the spen count is fixed to 3. RecyclerView mrv = (RecyclerView) findViewById(R.id.recyclerview_id); RecyclerViewAdapter myAdapter = new RecyclerViewAdapter(this, lsStore); mrv.setLayoutManager(new GridLayoutManager(this, 3)); mrv.setAdapter

问题 I am using recycler view with card view to show icons in my application. I am not able to figure out how to resize the app icons and increase/decrease the span count automatically depending on the screen size. Here is what I am doing to display it and the spen count is fixed to 3. RecyclerView mrv = (RecyclerView) findViewById(R.id.recyclerview_id); RecyclerViewAdapter myAdapter = new RecyclerViewAdapter(this, lsStore); mrv.setLayoutManager(new GridLayoutManager(this, 3)); mrv.setAdapter

问题 According to RecyclerView documentation about medthod notifyItemChanged(int position, Object payload) Notify any registered observers that the item at position has changed with an optional payload object. I don't understand how to use second paramenter payload in this method. I have searched many document about "payload" but everything was ambiguous. So, If you know about this method, please show me a clear example about it. Thank you very much. 回答1: Check out this sample code that