本文介绍了回收视图膨胀不同的行:- 绑定数据时出现异常的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在研究具有不同物品通胀的 Recyceview.当我 NOT 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 Exception 时，请检查我的代码并让我知道我哪里做错了.
I am working on the Recyceview with different item inflation. When i am NOT binding the data on onBindViewHolder method of RecycleView than it Does not crash..
But when i am binding the data inside the onBindViewHolder than i am getting the Exception, Please check my code and let me know where am i doing wrong.
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，当我绑定数据时，如下:-
Exception while i am binding the data are as follow:-
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)
推荐答案
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.
The reason isonCreateViewHolder(ViewGroup parent, int viewType). The parameter is view type but not position. Using int listViewItemType = getItemViewType(viewType) is incorrect because position should be passed to getItemViewType.
简而言之，您应该直接使用 viewType 并删除 onCreateViewHolder 中的 listViewItemType.
In short, you should use viewType directly and remove listViewItemType in onCreateViewHolder.
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