バイナリXMLファイルライン＃22：クラスフラグメントを拡張するエラー

私は、答えられる質問のリストがあるトレーニングプログラムを実施しています。回答テキストに応じて、質問の色が変わります。結果は別のアクティビティで表示する必要があります。バイナリXMLファイルライン＃22：クラスフラグメントを拡張するエラー

MainActivity：

エラー膨張クラスフラグメントここ

コードです：私は、テキストの問題の色ですが、私はそれらのエラーバイナリXMLファイルのライン＃22が持っているもの救うために断片を使用することを示唆しました

import android.content.Context; 
import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.view.View; 
import android.widget.Button; 

import java.util.ArrayList; 

public class MainActivity extends AppCompatActivity { 

    // public static String TAG = "MYLOG_main_activity"; 
    public static String KEY = "KEY"; 
    RecyclerView mRecyclerView; 
    LinearLayoutManager mLinearLayoutManager; 
    Context mContext; 
    Button mResult; 
    public static int[] iResult; 

    public static void MyReceiver(int[] result) 
    { 
     iResult = result; 
    } 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     if (savedInstanceState != null) 
     { 
      iResult = savedInstanceState.getIntArray(KEY); 
     } 
     mResult = (Button) findViewById(R.id.result); 
     mResult.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View asv) {if(iResult != null) { 
       /* Intent intent1 = new Intent("Intent"); 
       intent1.putExtra("message", iResult); 
       intent1.setAction("broadcast"); 
       sendBroadcast(intent1); 
*/ 

       Intent intent = new Intent(MainActivity.this, Result.class); 
       startActivity(intent); 
       Result.receiver(iResult); 
      } 

      } 
     }); 
     mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView); 
     mLinearLayoutManager = new LinearLayoutManager(mContext); 
     mRecyclerView.setLayoutManager(mLinearLayoutManager); 
     ArrayList<Ask> asks = new ArrayList<>(); 
     asks.add(0,new Ask(0,R.drawable.image1,R.string.one)); 
     asks.add(1,new Ask(1,R.drawable.image2,R.string.two)); 
     asks.add(2,new Ask(2,R.drawable.image3,R.string.three)); 
     asks.add(3,new Ask(3,R.drawable.image4,R.string.four)); 
     asks.add(4,new Ask(4,R.drawable.image5,R.string.five)); 
     //iResult = new int[asks.size()]; 
     RVAdapter adapter = new RVAdapter(asks); 
     mRecyclerView.setAdapter(adapter); 

    } 

    @Override 
    protected void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     outState.putIntArray(KEY, iResult); 
    } 
}

RVAdapter：

import android.support.v7.widget.CardView; 
import android.support.v7.widget.RecyclerView; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.TextView; 
import java.util.List; 


/** 
* Created by 1 on 2.09.2016. 
*/ 
public class RVAdapter extends RecyclerView.Adapter<RVAdapter.CardViewHolder>{ 
    public static final String TAG = "MYLOG_RVAdapter"; 
    List<Ask> asks; 
    int[] iResult; 
    RVAdapter(List<Ask> asks) { 
     this.asks = asks; 
      iResult = new int[asks.size()]; 
      for (int i = 0; i < asks.size(); i++) { 
       iResult[i] = 0; 
      } 

    } 
     @Override 
    public CardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
      View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false); //На эту строку ругается 
      Log.d(TAG,"onCreateViewHolder"); 
      return new CardViewHolder(v); 
    } 
    @Override 
    public int getItemCount() { 
     return asks.size(); 
    } 
    @Override 
    public void onAttachedToRecyclerView(RecyclerView recyclerView) { 
     Log.d(TAG,"onAttachedToRecyclerView"); 
     super.onAttachedToRecyclerView(recyclerView); 
    } 


    @Override 
    public void onBindViewHolder(final CardViewHolder holder, final int position) { 


     holder.mButtonNo.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       holder.mTextView.setBackgroundResource(R.color.No); 
       iResult[position] = 2; 
       MainActivity.MyReceiver(iResult); 
      } 
     }); 
     holder.mButtonYes.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       holder.mTextView.setBackgroundResource(R.color.Yes); 
       iResult[position] = 1; 
       MainActivity.MyReceiver(iResult); 
      } 
     }); 
     switch (position) { 

      case 0: 
       holder.mTextView.setText(R.string.one); 
       holder.mImageView.setImageResource(R.drawable.image1); 
       break; 
      case 1: 
       holder.mTextView.setText(R.string.two); 
       holder.mImageView.setImageResource(R.drawable.image2); 
       break; 
      case 2: 
       holder.mTextView.setText(R.string.three); 
       holder.mImageView.setImageResource(R.drawable.image3); 
       break; 
      case 3: 
       holder.mTextView.setText(R.string.four); 
       holder.mImageView.setImageResource(R.drawable.image4); 
       break; 
      case 4: 
       holder.mTextView.setText(R.string.five); 
       holder.mImageView.setImageResource(R.drawable.image5); 
       break; 
     } 

     Log.d(TAG,"onBindViewHolder"); 
     Log.d(TAG, String.valueOf(position)); 

    } 

    public static class CardViewHolder extends RecyclerView.ViewHolder { 
     ImageView mImageView; 
     TextView mTextView; 
     CardView mCardVew; 
     Button mButtonYes; 
     Button mButtonNo; 
     public CardViewHolder(View itemView) { 
      super(itemView); 
      mButtonNo = (Button) itemView.findViewById(R.id.No); 
      mButtonYes = (Button) itemView.findViewById(R.id.Yes); 
      mTextView = (TextView) itemView.findViewById(R.id.textView); 
      mImageView = (ImageView) itemView.findViewById(R.id.imageView); 
      mCardVew = (CardView) itemView.findViewById(R.id.cardView); 

      Log.d(TAG,"CardViewHolder"); 


     } 
    } 
}

TextFragment：

import android.support.v4.app.Fragment; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 

/** 
* Created by 1 on 04.10.2016. 
*/ 
public class TextFragment extends Fragment{ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     //return super.onCreateView(inflater, container, savedInstanceState); 
     View rootView = 
       inflater.inflate(R.layout.fragment1, container,false); 
     return rootView; 
    } 
}

activity_main：

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context="com.vkramarenko.myapplication.MainActivity"> 
    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="@string/result" 
     android:id="@+id/result" 
     android:layout_alignParentBottom="true" 
     android:layout_alignParentStart="true" 
     android:layout_toStartOf="@+id/Yes" 
     android:layout_alignParentEnd="true" /> 
    <android.support.v7.widget.RecyclerView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/recyclerView" 
     android:layout_above="@+id/result"> 

    </android.support.v7.widget.RecyclerView> 
</RelativeLayout>

項目：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <android.support.v7.widget.CardView 
     xmlns:card_view="http://schemas.android.com/apk/res-auto" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/cardView" 
     card_view:cardCornerRadius="10dp"> 
     <RelativeLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent"> 
      <Button 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="@string/no" 
       android:id="@+id/No" 
       android:layout_alignParentBottom="true" 
       android:layout_alignParentEnd="true" /> 
    <fragment 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:name="com.vkramarenko.myapplication.TextFragment" 
     android:id="@+id/textFragment" 
     android:layout_above="@+id/No" 
     android:layout_alignEnd="@+id/No" /> 
      <Button 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="@string/yes" 
       android:id="@+id/Yes" 
       android:layout_alignParentBottom="true" 
       android:layout_toStartOf="@+id/No" /> 

      <ImageView 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:id="@+id/imageView" 
       android:src="@drawable/image1" 
       android:contentDescription="" 
       android:layout_above="@+id/textFragment" 
       android:layout_alignEnd="@+id/No" /> 
     </RelativeLayout> 


    </android.support.v7.widget.CardView> 
</LinearLayout>

fragment1：

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:text="@string/one" 
     android:id="@+id/textView" 
     android:layout_gravity="center_horizontal" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentStart="true" /> 
</RelativeLayout>

出典

2016-10-09 Vlad Kramarenko

あなたのスタックトレースを投稿 – tynn