回收视图膨胀不同的行：- 绑定数据时出现异常
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【中文标题】回收视图膨胀不同的行：- 绑定数据时出现异常【英文标题】：Recycle-view inflating different row :- Getting exception while binding the data 【发布时间】：2017-02-19 15:31:33 【问题描述】：
我正在研究具有不同项目膨胀的Recyceview。当我不在RecycleView 的onBindViewHolder 方法上绑定数据时，它不会崩溃..
但是当我在onBindViewHolder 中绑定数据而不是得到Exception 时，请检查我的代码，让我知道我在哪里做错了。
package com.tv.practise.adapter;
/**
Created by Ravindra Kushwaha on 10/10/16.
*/
public class RecycleDataAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
private Context mContext;
private ArrayList<RecycleBen> data;
public static class SimpleText extends RecyclerView.ViewHolder
TextView first_data_tv;
public SimpleText(View v)
super(v);
this.first_data_tv = (TextView) v.findViewById(R.id.first_data_tv);
public class SimpleImage extends RecyclerView.ViewHolder
ImageView second_data_iv;
public SimpleImage(View v)
super(v);
this.second_data_iv = (ImageView) v.findViewById(R.id.second_data_iv);
public class SimpleImageWithText extends RecyclerView.ViewHolder
TextView third_data_tv;
ImageView third_iv;
public SimpleImageWithText(View v)
super(v);
this.third_data_tv = (TextView) v.findViewById(R.id.third_data_tv);
this.third_iv = (ImageView) v.findViewById(R.id.third_iv);
public RecycleDataAdapter(Context mContext, ArrayList<RecycleBen> data)
this.mContext = mContext;
this.data = data;
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
int listViewItemType = getItemViewType(viewType);
View itemView;
if(listViewItemType==1)
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_first_item, parent, false);
return new SimpleText(itemView
);
else if(listViewItemType==2)
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_fsecond_item, parent, false);
return new SimpleImage(itemView);
else
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_third_item, parent, false);
return new SimpleImageWithText(itemView);
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position)
RecycleBen bean = data.get(position);
if(holder.getItemViewType()==1)
/////HERE I AM GETTING THE EXCEPTION WHILE BINDIND DATA
((SimpleText)holder).first_data_tv.setText(bean.getName());
else if(holder.getItemViewType()==2)
else
/////HERE I AM GETTING THE EXCEPTION WHILE BINDIND DATA((SimpleImageWithText)holder).third_data_tv.setText(bean.getName());
@Override
public int getItemViewType(int position)
return Integer.parseInt(data.get(position).getType_row());
@Override
public int getItemCount()
return data.size();
异常在我绑定数据时如下：-
3758-3758/com.tv.practise E/androidRuntime﹕ FATAL EXCEPTION: main
Process: com.tv.practise, PID: 3758
java.lang.ClassCastException: com.tv.practise.adapter.RecycleDataAdapter$SimpleImageWithText cannot be cast to com.tv.practise.adapter.RecycleDataAdapter$SimpleText
at com.tv.practise.adapter.RecycleDataAdapter.onBindViewHolder(RecycleDataAdapter.java:101)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:5471)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:5504)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4741)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4617)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1994)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1390)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1353)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:574)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3028)
at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:2625)
at android.view.View.measure(View.java:18804)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18804)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18804)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18804)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643)
at android.view.View.measure(View.java:18804)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2112)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1228)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1464)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1119)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6060)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
【问题讨论】：
应该是错的。我删除了我的评论。我正在写另一个。 好的@Joshua .. 等待我们的回复 【参考方案1】：@Joshua 解决了我的问题..
对于我在这里发布的其他用户是在RecycleView 中膨胀不同行（3 行） 的代码 它工作正常，请检查以下代码行：- 我在这里发布我的完整代码，请检查：-
这里RecyleClass.java是我的主要课程
package com.tv.practise.recycleview;
import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import com.tv.practise.R;
import java.util.ArrayList;
/**
* Created by Ravindra Kushwaha on 10/10/16.
*/
public class RecyleClass extends Activity
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.recycle_main);
RecyclerView recycler_vw = (RecyclerView)findViewById(R.id.recycler_vw);
ArrayList<RecycleBen> arrayList = new ArrayList<>();
for (int i = 0;i<=25;i++)
RecycleBen bean = new RecycleBen();
if(i%2==0)
bean.setType_row("1");
bean.setName("First element");
bean.setImage_url("http://www.androhub.com/wp-content/uploads/2015/09/staggeredrecyclerview_banner.jpg");
else if(i%3==0)
bean.setType_row("2");
bean.setName("Second element");
bean.setImage_url("http://i.stack.imgur.com/snB84.png");
else
bean.setType_row("3");
bean.setName("Third element");
bean.setImage_url("http://inducesmile.com/wp-content/uploads/2015/05/gridbanner.jpg");
arrayList.add(bean);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(this);
recycler_vw.setLayoutManager(mLayoutManager);
recycler_vw.setItemAnimator(new DefaultItemAnimator());
recycler_vw.setAdapter(new RecycleDataAdapter(this, arrayList));
这是 RecyleClass.java 的我的 layout，即 recycle_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_
android:layout_>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_vw"
android:layout_
android:layout_
android:clipToPadding="false"
/>
</LinearLayout>
Gradles 条目用于 Recycleview 和 CardView 和 Glide
// CardView
compile 'com.android.support:cardview-v7:23.4.0'
// RecyclerView
compile 'com.android.support:recyclerview-v7:23.4.0'
// For the glide libraray
compile 'com.github.bumptech.glide:glide:3.7.0'
下面是我的getter 和setter 类，即RecycleBen.java
package com.tv.practise.recycleview;
/**
* Created by Ravindra Kushwaha on 10/10/16.
*/
public class RecycleBen
private String type_row;
private String name;
private String image_url;
public String getType_row()
return type_row;
public void setType_row(String type_row)
this.type_row = type_row;
public String getName()
return name;
public void setName(String name)
this.name = name;
public String getImage_url()
return image_url;
public void setImage_url(String image_url)
this.image_url = image_url;
最后是我的适配器类 RecycleDataAdapter.java
package com.tv.practise.adapter;
/**
* Created by Ravindra Kushwaha on 10/10/16.
*/
public class RecycleDataAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
private Context mContext;
private ArrayList<RecycleBen> data;
public class SimpleText extends RecyclerView.ViewHolder
TextView first_data_tv;
public SimpleText(View v)
super(v);
this.first_data_tv = (TextView) v.findViewById(R.id.first_data_tv);
public class SimpleImage extends RecyclerView.ViewHolder
ImageView second_data_iv;
ProgressBar second_pb;
public SimpleImage(View v)
super(v);
this.second_data_iv = (ImageView) v.findViewById(R.id.second_data_iv);
this.second_pb = (ProgressBar)v.findViewById(R.id.second_pb);
public class SimpleImageWithText extends RecyclerView.ViewHolder
TextView third_data_tv;
ImageView third_iv;
ProgressBar third_pb;
public SimpleImageWithText(View v)
super(v);
this.third_data_tv = (TextView) v.findViewById(R.id.third_data_tv);
this.third_iv = (ImageView) v.findViewById(R.id.third_iv);
this.third_pb = (ProgressBar)v.findViewById(R.id.third_pb);
public RecycleDataAdapter(Context mContext, ArrayList<RecycleBen> data)
this.mContext = mContext;
this.data = data;
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
View itemView;
if(viewType==1)
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_first_item, parent, false);
return new SimpleText(itemView
);
else if(viewType==2)
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_fsecond_item, parent, false);
return new SimpleImage(itemView);
else
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_third_item, parent, false);
return new SimpleImageWithText(itemView);
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position)
RecycleBen bean = data.get(position);
if(holder.getItemViewType()==1)
((SimpleText)holder).first_data_tv.setText(bean.getName());
else if(holder.getItemViewType()==2)
final SimpleImage simple_holder = (SimpleImage)holder;
simple_holder.second_pb.setVisibility(View.VISIBLE);
Glide.with(mContext)
.load(bean.getImage_url())
.fitCenter()
.crossFade()
.listener(new RequestListener<String, GlideDrawable>()
@Override
public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource)
if (e instanceof UnknownHostException)
simple_holder.second_pb.setVisibility(View.VISIBLE);
return false;
@Override
public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource)
simple_holder.second_pb.setVisibility(View.GONE);
simple_holder.second_data_iv.setVisibility(View.VISIBLE);
return false;
).into(simple_holder.second_data_iv);;
else
final SimpleImageWithText third_holder = (SimpleImageWithText)holder;
third_holder.third_data_tv.setText(bean.getName());
third_holder.third_pb.setVisibility(View.VISIBLE);
Glide.with(mContext)
.load(bean.getImage_url())
.fitCenter()
.crossFade()
.listener(new RequestListener<String, GlideDrawable>()
@Override
public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource)
if (e instanceof UnknownHostException)
third_holder.third_pb.setVisibility(View.VISIBLE);
return false;
@Override
public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource)
third_holder.third_pb.setVisibility(View.GONE);
third_holder.third_iv.setVisibility(View.VISIBLE);
return false;
).into(third_holder.third_iv);;
@Override
public int getItemViewType(int position)
return Integer.parseInt(data.get(position).getType_row());
@Override
public int getItemCount()
return data.size();
由于我们对Recycleview 中的不同行进行膨胀，所以我们在这里使用了3 个布局，它们分别为recycle_first_item.xml、recycle_fsecond_item.xml 和最后一个 recycle_third_item.xml
我一一展示了xml的所有布局，如下：-
recycle_first_item.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_view"
android:layout_
android:layout_
android:layout_gravity="center"
android:layout_margin="5dp"
card_view:cardCornerRadius="4dp">
<LinearLayout
android:layout_
android:layout_
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/first_data_tv"
android:layout_
android:layout_
android:textColor="@android:color/black"
android:textSize="25sp"
android:text="Hello Card" />
</LinearLayout>
recycle_fsecond_item.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_view"
android:layout_
android:layout_
android:layout_gravity="center"
android:layout_margin="5dp"
card_view:cardCornerRadius="4dp">
<RelativeLayout
android:layout_
android:layout_
>
<ProgressBar
android:id="@+id/second_pb"
android:layout_
android:layout_
android:layout_centerInParent="true"
/>
<ImageView
android:id="@+id/second_data_iv"
android:layout_
android:layout_
android:textColor="@android:color/black"
android:layout_centerInParent="true"
android:visibility="invisible"
android:src="@drawable/bubble1" />
</RelativeLayout>
</android.support.v7.widget.CardView>
recycle_third_item.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_view"
android:layout_
android:layout_
android:layout_gravity="center"
android:layout_margin="5dp"
card_view:cardCornerRadius="4dp">
<RelativeLayout
android:layout_
android:layout_
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/third_data_tv"
android:layout_
android:layout_
android:textColor="@android:color/black"
android:textSize="25sp"
android:layout_centerInParent="true"
android:text="Hello Card" />
<ProgressBar
android:id="@+id/third_pb"
android:layout_
android:layout_
android:layout_centerInParent="true"
android:layout_below="@+id/third_data_tv"
/>
<ImageView
android:id="@+id/third_iv"
android:layout_
android:layout_below="@+id/third_data_tv"
android:layout_
android:src="@drawable/bubble2"
android:layout_centerInParent="true"
android:visibility="invisible"
/>
</RelativeLayout>
</android.support.v7.widget.CardView>
最后结果如下：-
【讨论】：
完美答案！！ 谢谢..大约 4 年后，得到赞赏☺️ 这里是一个基于此代码的演示应用程序仓库的链接：github.com/n-anselm/MultiViewAdapterRecyclerViewDemo【参考方案2】：原因是onCreateViewHolder(ViewGroup parent, int viewType)。参数是视图类型而不是位置。使用int listViewItemType = getItemViewType(viewType) 是不正确的，因为position 应该传递给getItemViewType。
简而言之，你应该直接使用viewType，将onCreateViewHolder中的listViewItemType去掉。
【讨论】：
谢谢@Joshua .. 它工作了.. 现在我接受你的回答并在这里为其他用户发布正确的代码.. 再次感谢:)以上是关于回收视图膨胀不同的行：- 绑定数据时出现异常的主要内容，如果未能解决你的问题，请参考以下文章
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