当我尝试在我的HomeFragment中实现RecyclerView时，应用程序已停止

我正在关注教程&我尝试通过添加适配器并在HomeFragment中显示此消息来添加RecyclerView，但当我在模拟器上运行该项目时，。当我尝试在我的HomeFragment中实现RecyclerView时，应用程序已停止

我有我的HomeFragment，我的适配器，我的模型

我HomeFragment.java

package com.medum.medum.view.fragments; 


import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.support.v7.widget.Toolbar; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 

import com.medum.medum.R; 
import com.medum.medum.adapter.CardAdapterRecyclerView; 
import com.medum.medum.model.Picture; 

import java.util.ArrayList; 


public class HomeFragment extends Fragment { 


public HomeFragment() { 
    // Required empty public constructor 
} 


@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    // Inflate the layout for this fragment 
    View view = inflater.inflate(R.layout.fragment_home, container, false); 
    showtoolbar("Inicio",false,view); 
    RecyclerView cardsRecycler = (RecyclerView) view.findViewById(R.id.cardrecycler); 

    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext()); 
    linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL); 

    cardsRecycler.setLayoutManager(linearLayoutManager); 

    CardAdapterRecyclerView cardAdapterRecyclerView = new CardAdapterRecyclerView(buildPict(),R.layout.cardview_picture,getActivity()); 
    cardsRecycler.setAdapter(cardAdapterRecyclerView); 
    return view; 
} 

public ArrayList<Picture> buildPict(){ 
    ArrayList<Picture> pictures = new ArrayList<>(); 
    pictures.add(new Picture("http://www.construyehogar.com/wp-content/uploads/2016/02/Idea-fachada-casa-dos-pisos-moderna-coralhomes.com_.au-.jpg","Casa en venta", 200000, "4 recamaras", "5")); 
    pictures.add(new Picture("http://weknowyourdreams.com/images/casa/casa-06.jpg","Casa en renta", 5000, "2 recamaras", "6")); 
    pictures.add(new Picture("http://www.terrazasdelpacifico.mx/images/departamentos_en_Tijuana_Lunada_img1.jpg","Departamento en renta", 3000, "2 recamaras", "6")); 
    return pictures; 
} 

public void showtoolbar(String tittle, boolean upButton,View view){ 
    Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar); 
    ((AppCompatActivity) getActivity()).setSupportActionBar(toolbar); 
    ((AppCompatActivity) getActivity()).getSupportActionBar().setTitle(tittle); 
    ((AppCompatActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(upButton); 
} 

}

我的适配器 - CardAdapterRecyclerView.java

package com.medum.medum.adapter; 

import android.app.Activity; 
import android.support.v7.widget.CardView; 
import android.support.v7.widget.RecyclerView; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
import android.widget.TextView; 

import com.medum.medum.R; 
import com.medum.medum.model.Picture; 

import java.util.ArrayList; 


public class CardAdapterRecyclerView extends RecyclerView.Adapter<CardAdapterRecyclerView.CardViewHolder>{ 

private ArrayList<Picture> pictures; 
private int resource; 
private Activity activity; 

public CardAdapterRecyclerView(ArrayList<Picture> pictures, int resource, Activity activity) { 
    this.pictures = pictures; 
    this.resource = resource; 
    this.activity = activity; 
} 

@Override 
public CardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View view = LayoutInflater.from(parent.getContext()).inflate(resource,parent,false); 

    return new CardViewHolder(view); 
} 

@Override 
public void onBindViewHolder(CardViewHolder holder, int position) { 
    Picture picture = pictures.get(position); 
    holder.titlecard.setText(picture.getTitlecard()); 
    holder.pricecard.setText(picture.getPricecard()); 
    holder.descriptioncard.setText(picture.getDescriptioncard()); 
    holder.timecard.setText(picture.getTimecard()); 

} 

@Override 
public int getItemCount() { 
    return pictures.size(); 
} 

public class CardViewHolder extends RecyclerView.ViewHolder{ 

    private CardView pictureCard; 
    private TextView titlecard; 
    private TextView pricecard; 
    private TextView descriptioncard; 
    private TextView timecard; 
    public CardViewHolder(View itemView) { 
     super(itemView); 

     pictureCard = (CardView) itemView.findViewById(R.id.picturecard); 
     titlecard = (TextView) itemView.findViewById(R.id.cardtitle); 
     pricecard = (TextView) itemView.findViewById(R.id.price); 
     descriptioncard = (TextView) itemView.findViewById(R.id.description); 
     timecard = (TextView) itemView.findViewById(R.id.timecard); 
    } 
} 
}

我的模型 - Picture.java

package com.medum.medum.model; 

import android.widget.TextView; 

public class Picture { 
private String picture; 
private String titlecard; 
private int pricecard = 0; 
private String descriptioncard; 
private String timecard = "0"; 

public Picture(String picture, String titlecard, int pricecard, String descriptioncard, String timecard) { 
    this.picture = picture; 
    this.titlecard = titlecard; 
    this.pricecard = pricecard; 
    this.descriptioncard = descriptioncard; 
    this.timecard = timecard; 
} 

public String getPicture() { 
    return picture; 
} 

public void setPicture(String picture) { 
    this.picture = picture; 
} 

public String getTitlecard() { 
    return titlecard; 
} 

public void setTitlecard(String titlecard) { 
    this.titlecard = titlecard; 
} 

public int getPricecard() { 
    return pricecard; 
} 

public void setPricecard(int pricecard) { 
    this.pricecard = pricecard; 
} 

public String getDescriptioncard() { 
    return descriptioncard; 
} 

public void setDescriptioncard(String descriptioncard) { 
    this.descriptioncard = descriptioncard; 
} 

public String getTimecard() { 
    return timecard; 
} 

public void setTimecard(String timecard) { 
    this.timecard = timecard; 
} 
}

适配器XML

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v7.widget.CardView 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:cardview="http://schemas.android.com/apk/res-auto" 
android:id="@+id/picturecard" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
cardview:cardCornerRadius="4dp"> 

<LinearLayout 
    android:layout_width="match_parent" 
    android:layout_height="250dp" 
    android:orientation="vertical" 
    android:weightSum="4"> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="0dip" 
     android:layout_weight="3.2" 
     android:orientation="vertical"> 

     <FrameLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:layout_gravity="center_horizontal"> 

      <ImageView 
       android:id="@+id/coverImageView" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_gravity="center" 
       android:scaleType="centerCrop" 
       android:background="@drawable/prueba" 
       /> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_gravity="left|bottom" 
       android:background="#8c0085B2" 
       android:orientation="horizontal"> 

       <TextView 
        android:id="@+id/cardtitle" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:padding="16dp" 
        android:textSize="25sp" 
        android:textColor="#FFFFFF" 
        android:textStyle="bold" 
        android:text="Casa en venta"/> 

       <TextView 
        android:id="@+id/price" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:padding="16dp" 
        android:textSize="20sp" 
        android:textColor="#FFFFFF" 
        android:textStyle="bold" 
        android:text="$145,000.000 MXN"/> 
      </LinearLayout> 
     </FrameLayout> 
    </LinearLayout> 


    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="0dip" 
     android:layout_weight="0.8" 
     android:gravity="center|right" 
     android:orientation="horizontal"> 

      <TextView 
       android:id="@+id/description" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="@string/description" 
       android:layout_marginRight="8dp" 
       /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Hace" 
      android:layout_marginRight="5dp"/> 
     <TextView 
      android:id="@+id/timecard" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="4 dias" 
      android:layout_marginRight="8dp"/> 

     <CheckBox 
      android:id="@+id/Favorite" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:button="@drawable/fav_selected" 
      /> 

     <ImageView 
      android:id="@+id/messageuser" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:paddingLeft="8dp" 
      android:paddingRight="8dp" 
      android:src="@drawable/chat" /> 
    </LinearLayout> 

</LinearLayout>

logcat的

08-04 12:58:39.870 9223-9223/com.medum.medum E/AndroidRuntime: FATAL EXCEPTION: main 
                  Process: com.medum.medum, PID: 9223 
                  java.lang.ClassCastException: android.support.v7.widget.CardView cannot be cast to android.widget.ImageView 
                   at com.medum.medum.adapter.CardAdapterRecyclerView$CardViewHolder.<init>(CardAdapterRecyclerView.java:64) 
                   at com.medum.medum.adapter.CardAdapterRecyclerView.onCreateViewHolder(CardAdapterRecyclerView.java:36) 
                   at com.medum.medum.adapter.CardAdapterRecyclerView.onCreateViewHolder(CardAdapterRecyclerView.java:20) 
                   at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:6411) 
                   at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5597) 
                   at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5482) 
                   at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5478) 
                   at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2215) 
                   at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1542) 
                   at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1502) 
                   at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:595) 
                   at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3625) 
                   at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3354) 
                   at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3886) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1791) 
                   at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1635) 
                   at android.widget.LinearLayout.onLayout(LinearLayout.java:1544) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:131) 
                   at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42) 
                   at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1389) 
                   at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:868) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) 
                   at android.widget.FrameLayout.onLayout(FrameLayout.java:261) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1080) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) 
                   at android.widget.FrameLayout.onLayout(FrameLayout.java:261) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1791) 
                   at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1635) 
                   at android.widget.LinearLayout.onLayout(LinearLayout.java:1544) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) 
                   at android.widget.FrameLayout.onLayout(FrameLayout.java:261) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1791) 
                   at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1635) 
                   at android.widget.LinearLayout.onLayout(LinearLayout.java:1544) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) 
                   at android.widget.FrameLayout.onLayout(FrameLayout.java:261) 
08-04 12:58:39.871 9223-9223/com.medum.medum E/AndroidRuntime:  at com.android.internal.policy.DecorView.onLayout(DecorView.java:736) 
                   at android.view.View.layout(View.java:19393) 
                   at android.view.ViewGroup.layout(ViewGroup.java:6022) 
                   at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2480) 
                   at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2199) 
                   at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1385) 
                   at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6722) 
                   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:886) 
                   at android.view.Choreographer.doCallbacks(Choreographer.java:698) 
                   at android.view.Choreographer.doFrame(Choreographer.java:633) 
                   at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:872) 
                   at android.os.Handler.handleCallback(Handler.java:769) 
                   at android.os.Handler.dispatchMessage(Handler.java:98) 
                   at android.os.Looper.loop(Looper.java:164) 
                   at android.app.ActivityThread.main(ActivityThread.java:6540) 
                   at java.lang.reflect.Method.invoke(Native Method) 
                   at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

来源

2017-08-04 Arturo Perez

请复制粘贴例外的内容，而不是附加图片。 – avojak

请发布适配器的xml以及 –

已经做到了。 –

您是铸造ImageView的，而不是cardview试图改变这一点：

private CardView pictureCard; 

pictureCard = (CardView) itemView.findViewById(R.id.picturecard);

或者：

你加错id.And如果是，只是改变这一点：

pictureCard = (ImageView) itemView.findViewById(R.id.coverImageView);

来源

2017-08-04 20:31:32

已经试过这个并继续有相同的错误 –

你做卡更变的变量变量吗？或更改ID？ @ArturoPerez –

第一个变量和相同的东西，后面的id和相同的 –

你铸造错误的观点。这样做：

private CardView pictureCard; 

     pictureCard = (CardView) itemView.findViewById(R.id.picturecard);

在您的ViewHolder中。

而且，这种进口：

import android.widget.TextView;

模型类没有任何意义。

来源

2017-08-04 20:34:03

是否接受帮助你的答案 –

已经试过并继续有相同的错误 –

我看到你没有在适配器的任何地方使用CardView或ImageView。只要删除声明和分配。看看是否有效。 –

看起来您的ID为picturecard的视图代表Cardview，但您将其视为ImageView。因此ClassCastException。

我会建议更换这些线路 private ImageView pictureCard;和pictureCard = (ImageView)itemView.findViewById(R.id.picturecard);

与

和pictureCard = (CardView) itemView.findViewById(R.id.picturecard);

分别

来源

2017-08-04 20:34:16

已经尝试过并继续发生相同的错误 –

在更改后可以发布更新的代码和堆栈跟踪吗？ –

堆栈跟踪不正确，或者您的手机没有包含最新更新代码的应用程序。请清理该项目并再次运行。 –

如果这是你完整的XML代码，然后我找不到任何标签结束cardview。因此，请关闭您的卡片视图

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

来源

2017-08-06 04:17:15

当我尝试在我的HomeFragment中实现RecyclerView时，应用程序已停止

回答

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