RecyclerView pas de défilement vers le bas

J'ai suivi le recyclerview lignes directrices et construit un pour l'application que je fais, mais il n'a pas faites défiler vers le bas pour une raison quelconque. Je l'ai comparé avec google des extraits de code, ainsi que d'autres extraits de code en ligne et ne peut pas voir la différence. J'ai posté une photo et le code que j'utilise. Je suis à l'aide d'onglets, donc la recyclerview est rempli dans un fragment.

Ce que l'application ressemble:

http://imgur.com/H5uOLFR

la classe d'adaptateur:

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private List<Group> 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(R.id.groupName);
groupDate = (TextView) v.findViewById(R.id.groupDate);
groupLocation = (TextView) v.findViewById(R.id.groupLocation);
className = (TextView) v.findViewById(R.id.className);
}
}
/*
* 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<Group> 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();
}
}

Le Fragment de classe:

public class groupsFragment extends Fragment implements GroupLeaver, GroupRetriever {
private RecyclerView rv;
private List<Group> 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(R.id.recyclerView);
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<Group> groups) {
Log.d("TEST", "Entered onMyGroupsFound");
Logg.info(this.getClass(), "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) {
}
}

Le xml de mise en page pour le recyclerview:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@null"/>
</FrameLayout>

Le xml de mise en page pour le recyclerview éléments:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
android:orientation="horizontal">
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="0dp"
android:layout_weight="3"
android:orientation="vertical">
<TextView
android:id="@+id/groupName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Group Name"
/>
<TextView
android:id="@+id/groupDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Group Date"
/>
<TextView
android:id="@+id/groupLocation"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Group Location"
/>
</LinearLayout>
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="@+id/className"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="right"
android:text="Class Name"
/>
</LinearLayout>
</LinearLayout>
</FrameLayout>

OriginalL'auteur Mehul Goel | 2015-08-13