java.lang.NullPointerException à android.de soutien.v7.widget de.RecyclerView.onMeasure

J'essaie d'utiliser RecyclerView avec RecyclerView.Adaptateur, mais voici quelque chose de mal. Je poste mon code ci-dessous:

Mise en page:

   <android.support.v7.widget.RecyclerView
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/topic_view"
    android:scrollbars="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

topic_tile.xml:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="@dimen/tile_height">

    <com.makeramen.RoundedImageView
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/avatar"
        android:padding="16dp"
        app:riv_corner_radius="72dp"
        android:layout_height="72dp"
        android:layout_width="72dp"
        />

    <LinearLayout
        android:id="@+id/text_layout"
        android:orientation="vertical"
        android:paddingTop="@dimen/text_padding_top_and_bottom"
        android:paddingBottom="@dimen/text_padding_top_and_bottom"
        android:paddingRight="16dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <TextView
            android:id="@+id/title"
            android:textSize="@dimen/primary_font"
            android:paddingLeft="@dimen/text_padding_left"
            android:textColor="#000000"
            android:text="Title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
        <TextView
            android:id="@+id/author"
            android:textSize="@dimen/secondary_font"
            android:paddingLeft="@dimen/text_padding_left"
            android:text="author"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    </LinearLayout>
</RelativeLayout>

Ici est en onCreate()

public class TitleListActivity extends ActionBarActivity {

    private RecyclerView topic_view;
    private RecyclerView.LayoutManager mLayoutManager;
    private TitlelistAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_title_list);

        .....

        topic_view = (RecyclerView)findViewById(R.id.topic_view);
        adapter = new TitlelistAdapter(topicList);

        topic_view.setHasFixedSize(true);
        mLayoutManager = new LinearLayoutManager(TitleListActivity.this);
        topic_view.setLayoutManager(mLayoutManager);
        topic_view.setItemAnimator(new DefaultItemAnimator());

        topic_view.setAdapter(adapter);

la Carte:

public class TitlelistAdapter extends RecyclerView.Adapter<TitlelistAdapter.ViewHolder> {
public List<Topic> topicList;
public static class ViewHolder extends RecyclerView.ViewHolder{
TextView title;
TextView author;
RoundedImageView avatar;
public ViewHolder(View itemView) {
super(itemView);
title = (TextView)itemView.findViewById(R.id.title);
author = (TextView)itemView.findViewById(R.id.author);
avatar = (RoundedImageView)itemView.findViewById(R.id.avatar);
}
}
public TitlelistAdapter(List<Topic> topicList){
this.topicList = topicList;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.topic_tile,viewGroup,false);
return new ViewHolder(itemView);
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
viewHolder.title.setText(topicList.get(i).title);
viewHolder.author.setText(topicList.get(i).member.username);
}
@Override
public long getItemId(int position) {
return super.getItemId(position);
}
@Override
public int getItemCount() {
return topicList.size();
}
}

Ici est l'exception:

java.lang.NullPointerException
at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:1694)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:453)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
at android.view.View.measure(View.java:16497)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1912)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1109)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1291)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)

Est-il quelque chose que je n'ai pas d'init ou quelque chose que je devrais écrire plus?

InformationsquelleAutor Randy | 2014-11-04