我遵循了recyclerview指南并为我正在制作的应用程序构建了一个,但由于某种原因它不会滚动到底部。 我将它与谷歌代码片段以及其他在线代码片段进行了比较,看不出差异。 我发布了一张图片和我正在使用的代码。 我正在使用制表符,因此recyclerview填充在片段中。


View post on


public class MyAdapter extends RecyclerView.Adapter { private List groups; // Provide a reference to the views for each data item // Complex data items may need more than one view per item, and // you provide access to all the views for a data item in a view holder public class ViewHolder extends RecyclerView.ViewHolder { // each data item is just a string in this case public TextView groupName; public TextView groupDate; public TextView groupLocation; public TextView className; public ViewHolder(View v) { super(v); groupName = (TextView) v.findViewById(; groupDate = (TextView) v.findViewById(; groupLocation = (TextView) v.findViewById(; className = (TextView) v.findViewById(; } } /* * TODO: finish this method */ public void add(int position, String item) { notifyItemInserted(position); } public void remove(String item) { int position = groups.indexOf(item); groups.remove(position); notifyItemRemoved(position); } // Provide a suitable constructor (depends on the kind of dataset) public MyAdapter(List groupsList) { groups = groupsList; Log.d("TEST", "Number of Groups: " + Integer.toString(groups.size())); } // Create new views (invoked by the layout manager) @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { // create a new view View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.group_view, parent, false); // set the view's size, margins, paddings and layout parameters ViewHolder vh = new ViewHolder(v); return vh; } // Replace the contents of a view (invoked by the layout manager) @Override public void onBindViewHolder(ViewHolder holder, int position) { // - get element from your dataset at this position // - replace the contents of the view with that element final Group group = groups.get(position); // holder.groupName.setText(group.getName()); holder.groupName.setText(group.getName()); holder.groupDate.setText(group.getFormattedDate()); holder.groupLocation.setText(group.getLocation()); holder.className.setText(group.getParent().getName()); } // Return the size of your dataset (invoked by the layout manager) @Override public int getItemCount() { return groups.size(); } } 


 public class groupsFragment extends Fragment implements GroupLeaver, GroupRetriever { private RecyclerView rv; private List groups; private ProgressDialog progressDialog; @Override public void onCreate(Bundle savedInstance){ super.onCreate(savedInstance); Log.d("TEST", "Entered onCreate"); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { AppMain.getController().retrieveGroups(groupsFragment.this); Log.d("TEST", "Entered onCreateView"); View rootView = inflater.inflate(R.layout.groups_fragment, container, false); rv = (RecyclerView) rootView.findViewById(; rv.setLayoutManager(new LinearLayoutManager(getActivity())); Log.d("TEST", "Size of LIST: " + Integer.toString(groups.size())); MyAdapter adapter = new MyAdapter(groups); rv.setAdapter(adapter); return rootView; } @Override public void onMyGroupsFound(List groups) { Log.d("TEST", "Entered onMyGroupsFound");, "Found %d groups for member %s", groups.size(), User.getCurrentUser().getDisplayName()); this.groups = groups; } @Override public void onGroupLeft(Group oldGroup) { } @Override public void onGroupLeftFailed(Group group, ParseException e) { } } 






 list.add(0, group); adapter.notifyItemInserted(0); recyclerview.scrollToPosition(0); 



 compile '' 


 compile '' 

致@roi divon的答案: CoordinatorLayout with RecyclerView&CollapsingToolbarLayout


 android:scrollbarAlwaysDrawVerticalTrack="true" android:scrollbars="vertical"