RecyclerViewとCardViewを使ってリストを作ったいるのですが､Adapter内のonCreateViewHolderでアイテム用のCardViewをinflateするときに以下のエラーが出てしまいます｡
android.view.InflateException: Binary XML file line #2: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:633)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
LayoutInflaterが取得出来ていないかと考えたのですが､取得出来ていましたし､アイテムに入れるべきデータもしっかりと取得出来ていました｡
Adapterは以下のようになっていて､Activityの内部クラスとして定義されています｡
private class SearchAdapter extends RecyclerView.Adapter<SearchAdapter.ViewHolder>{
private LayoutInflater mInflater;
private List<Video> mVideoInfo;
private Context mContext;
private int mResourceId;
public SearchAdapter(Context context, int resourceId){
super();
mContext=context;
mResourceId=resourceId;
mInflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mVideoInfo = new ArrayList<>();
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
View v = mInflater.inflate(mResourceId, parent, false);
return new ViewHolder(v);
}
@Override
public int getItemCount(){
return (null != mVideoInfo ? mVideoInfo.size() : 0);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position){
Video item = mVideoInfo.get(position);
holder.title.setText(item.title);
holder.duration.setText(item.duration);
Picasso.with(getApplicationContext())
.load(item.thumbnails.medium.url)
.placeholder(R.drawable.thumbnail_background_480)
.transform(new ViewUtils.YouTubeThumbnailEditor())
.into(holder.thumbnail);
}
class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, PopupMenu.OnMenuItemClickListener{
TextView title;
ImageView thumbnail;
TextView companyAndGoods;
TextView duration;
ImageView optionButton;
RelativeLayout item;
public ViewHolder(View v){
super(v);
title = findById(v, R.id.title);
thumbnail = findById(v, R.id.thumbnail);
companyAndGoods = findById(v, R.id.company_and_goods);
duration = findById(v, R.id.duration);
optionButton = findById(v, R.id.option_button);
item = findById(v, R.id.item);
optionButton.setTag(OPTION + mVideoInfo.get(getAdapterPosition()).id);
optionButton.setOnClickListener(this);
item.setTag(VIDEO+mVideoInfo.get(getAdapterPosition()).id);
item.setOnClickListener(this);
}
@Override
public void onClick(View v) {
String tag = (String)v.getTag();
if(tag.substring(0, VIDEO.length()).equals(VIDEO)){
moveToVideoActivity(tag.substring(VIDEO.length()));
}else if(tag.substring(0, OPTION.length()).equals(OPTION)){
PopupMenu popupMenu = new PopupMenu(SearchActivity.this, v);
popupMenu.getMenuInflater().inflate(R.menu.video_option_menu, popupMenu.getMenu());
popupMenu.setOnMenuItemClickListener(this);
popupMenu.show();
}
}
@Override
public boolean onMenuItemClick(MenuItem menuItem) {
//TODO : お気に入り処理
return false;
}
}
public void addAll(List<Video> object) {
mVideoInfo.addAll(object);
notifyDataSetChanged();
}
}
次のonCreate()の箇所でRecyclerViewを初期化しています｡
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mAdapter = new SearchAdapter(this, R.layout.search_item);
mRecyclerView.setAdapter(mAdapter);
またRecyclerViewとアイテム用のCardViewは以下のようになっています｡
RecyvlerView
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"
android:background="@color/background"/>
CardView
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:layout_marginRight="10dp"
android:layout_marginLeft="10dp"
app:cardCornerRadius="?attr/cardCornerRadius"
android:clickable="true">
<com.balysv.materialripple.MaterialRippleLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:mrl_rippleColor="@android:color/darker_gray">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@id/thumbnail"
android:layout_width="480px"
android:layout_height="270px"
android:contentDescription="@string/sample_image"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"/>
<ImageView
android:id="@+id/option_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_action_overflow"
android:contentDescription="@string/sample_image"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"/>
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="2"
android:layout_toRightOf="@id/thumbnail"
android:layout_toEndOf="@id/thumbnail"
android:layout_alignParentTop="true"
android:layout_toStartOf="@id/option_button"
android:layout_toLeftOf="@id/option_button"/>
<TextView
android:id="@+id/duration"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"/>
<TextView
android:id="@+id/company_and_goods"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxLines="1"
android:ellipsize="end"
android:layout_toRightOf="@id/thumbnail"
android:layout_toEndOf="@id/thumbnail"
android:layout_alignParentBottom="true"
android:layout_toStartOf="@id/duration"
android:layout_toLeftOf="@id/duration"/>
</RelativeLayout>
</com.balysv.materialripple.MaterialRippleLayout>
</android.support.v7.widget.CardView>
何度もデバッグしてみたのですが､原因となる箇所を特定できませんでした｡ なにかこのエラーを回避する方法がありましたら教えていただけるとありがたいです｡ よろしくおねがいします｡