android-recyclerview

问题 The Problem I want to show the System Bars when the user scrolls an RecyclerView upwards and hide the System Bars when the user scrolls down. However with my Approach it works, but the content strangly moves and blinks during the show/hide process. U uploaded a Video for the behaviour here: https://drive.google.com/open?id=0B_b9EpRt-zyHVW54dkQzcXdUTXM My Approach Basically I have this two methods: private void hideSystemUI() { getActivity().getWindow().getDecorView().setSystemUiVisibility(

问题 Auto Scrolling is issue & also move to some specific position using code is difficult. I am making two recyclerView dependent to each other with the Horizontal Scroll and center selection. So my problem is using the method of Notifydatasetchanged and reseting recyclerView postion to 0 and it's scrolling selection range because it's returning wrong index... When i want to get center selection index after changing data. I am using below example to achieve this with some edits. Get center

问题 I have a layout with a RecyclerView with the adapter: public class SimpleRecyclerAdapter extends RecyclerView.Adapter<SimpleViewHolder> { protected List<JSONObject> data = new ArrayList<>(); public List<JSONObject> getData() { return data; } } I update it's adapter like: public void udpdateFromJson( JSONObject payload ) { JSONArray msgs = payload.optJSONArray( "messages" ); for( int ix = 0; null != msgs && ix < msgs.length(); ix++ ){ JSONObject o = msgs.optJSONObject( ix ); if( loadingMore )

问题 When I load images from SD card to ListView, it starts lagging. I can not scroll smoothly. So, I decided to use recycler view and maybe Picasso. The only problem I am facing is that, ListView adapter is not working with RecyclerView. How can I rewrite the following code/adapter to work with RecyclerView? All the best and Happy New Year! public class Saveditems extends BaseActivity { ArrayList<String> f = new ArrayList<>();// list of file paths File[] listFile; @Override public void onCreate

问题 I have surf this type of error but I didn't get what can I do in my case. I am getting following lint error. Do not treat position as fixed; only use immediately and call holder.getAdapterPosition() to look it up later. RecyclerView will not call onBindViewHolder again when the position of the item changes in the data set unless the item itself is invalidated or the new position cannot be determined. For this reason, you should only use the position parameter while acquiring the related data

问题 Is it possible that I can use a recycler view inside another recycler view ? My requirements are to show multiple Lists in a screen : Vertical List of 3 Items Horizontal List of 10 Items Vertical List of 5 Expandable Items Again Horizontal List of 5 Items So, I was thinking to have a MultiRecylerAdapter, which would hold adapters for other recyler views inside. 回答1: I found the solution. We can insert the recycler view ( either vertical or horizontal) inside any other recyclerview but default

问题 I'm trying to sort a RecyclerView by Date, but I tried too many things and I don't know what to try now. The problem is in the line adapter.notifyDataSetChanged(); because if I don't put doesn't show me the error but doesn't update the recyclerview too This is what I have now, and shows me that error. Unable to start activity ComponentInfo{st.stc/sharetaxi.sharetaxicabdriver.PendingTrajectRecyclerView}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7

问题 I have tried to create nested recyclerview in combination with the mvvmcross-framework which actually worked quite easily, but now I'm getting out of memory exceptions. Scenario I have a list of around 3000 entries with complex and long names, which are divided by 8 categories. The user can select the entries via a checkbox to assign them to a task later on. Even if it might sound like there are too many entries, it is actually quite easily to navigate through them, if the user has some

问题 I am getting below exception- Caused by: java.lang.IllegalStateException: RecyclerView has no LayoutManager at android.support.v7.widget.RecyclerView.generateLayoutParams(RecyclerView.java:2820) at android.view.LayoutInflater.rInflate(LayoutInflater.java:757) at android.view.LayoutInflater.inflate(LayoutInflater.java:492) at android.view.LayoutInflater.inflate(LayoutInflater.java:397) at com.peoplecloud.app.guggu.NavigationDrawerFragment.onCreateView(NavigationDrawerFragment.java:75) at

问题 I want to add divider lines in my RecyclerView Layout . I already searched some time, but I can only find solutions that utilise RecyclerView.addItemDecoration , which adds the divider between all items. I could create a layout that has a single line and add that to the RecyclerView , but that doesn't seem like an elegant solution to me. 回答1: You can write a custom RecyclerView.ItemDecoration and draw divider only where you need. And set it to RecyclerView using: recyclerView