如何在回收站视图中有多个视图

Posted 2023-02-26

【中文标题】如何在回收站视图中有多个视图

【英文标题】：How to have multiple views in a recyclerview

【发布时间】：2016-10-25 13:12:30

【问题描述】：

我想在我的 RecyclerView 中有多个视图。我想在传递“pauze”这个词时使用“card_view_row_pauze”，当没有传递“pauze”这个词时我想使用“card_view_row”。我尝试了一些东西（请参阅我在代码中添加的 cmets），但它不起作用。我在 *** 上找到了一些答案，但不幸的是，我似乎无法实现它。我该怎么做？

MyRecyclerViewAdapter.java

package com.company.app;

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.TextView;
import android.widget.Toast;

import java.util.ArrayList;

public class MyRecyclerViewAdapter extends RecyclerView .Adapter<MyRecyclerViewAdapter .DataObjectHolder> 
    private ArrayList<DataObject> mDataset;
    private static MyClickListener myClickListener;
    private Activity mActivity;

    public static class DataObjectHolder extends RecyclerView.ViewHolder implements View .OnClickListener 
        TextView label;
        TextView dateTime;
        TextView tijd;
        CardView cardView;

        public DataObjectHolder(View itemView) 
            super(itemView);
            label = (TextView) itemView.findViewById(R.id.textView);
            dateTime = (TextView) itemView.findViewById(R.id.textView2);
            tijd = (TextView) itemView.findViewById(R.id.textView3);
            cardView = (CardView) itemView.findViewById(R.id.card_view);
            itemView.setOnClickListener(this);
        

        @Override public void onClick(View v) 
            myClickListener.onItemClick(getAdapterPosition(), v);
        
    

    ViewGroup myParent; // THIS I ADDED TO SUPPORT MULTIPLE VIEWS

    public void setOnItemClickListener(MyClickListener myClickListener) 
        this.myClickListener = myClickListener;
    

    public MyRecyclerViewAdapter(Activity activity, ArrayList<DataObject> myDataset) 
        mDataset = myDataset;
        mActivity = activity;
    

    @Override public DataObjectHolder onCreateViewHolder(ViewGroup parent,int viewType) 
        myParent = parent; // THIS I ADDED TO SUPPORT MULTIPLE VIEWS
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view_row, parent, false);
        DataObjectHolder dataObjectHolder = new DataObjectHolder(view);
        return dataObjectHolder;
    

    @Override
    public void onBindViewHolder(DataObjectHolder holder, final int position) 
        if (mDataset.get(position).getmText1().equals("Pauze"))  //HERE I WANT TO USE THE "card_view_row_pauze" VIEW WHEN THE PASSED TEXT CONTAINS "PAUZE"
            View viewd = LayoutInflater.from(myParent.getContext()).inflate(R.layout.card_view_row_pauze, myParent, false);
            DataObjectHolder dataObjectHolderd = new DataObjectHolder(viewd);
            dataObjectHolderd.label.setText(mDataset.get(position).getmText1());
            dataObjectHolderd.tijd.setText(mDataset.get(position).getmText3());
        
        else 
            holder.cardView.setOnClickListener(new View.OnClickListener() 
                @Override
                public void onClick(View v) 
                    String myDescription = mDataset.get(position).getDescription();
                    if (myDescription.length() >= 2) 
                        Toast.makeText(MainActivity.getMain().getApplicationContext(), myDescription, Toast.LENGTH_SHORT).show();
                    
                
            );
            holder.label.setText(mDataset.get(position).getmText1());
            holder.dateTime.setText(mDataset.get(position).getmText2());
            holder.tijd.setText(mDataset.get(position).getmText3());
        
    

    public void addItem(final DataObject dataObj, final int index) if (mActivity == null)return;

        mActivity.runOnUiThread(new Runnable() 
            @Override public void run() 
                mDataset.add(index, dataObj);
                notifyItemInserted(index);
            
        );
    

    public void deleteItem(int index) 
        mDataset.remove(index);
        notifyItemRemoved(index);
    

    @Override public int getItemCount() return mDataset.size();
    public interface MyClickListener public void onItemClick(int position, View v);

DataObject.java

package com.company.app;

public class DataObject 
    private String mText1;
    private String mText2;
    private String mText3;
    private String mState;
    private String mDescription;

    DataObject (String text1, String text2, String text3, String state, String description)
        mText1 = text1;
        mText2 = text2;
        mText3 = text3;
        mState = state;
        mDescription = description;
    

    public String getmText1() return mText1;
    public void setmText1(String mText1) 
        this.mText1 = mText1;
    
    public String getmText2() 
        return mText2;
    
    public void setmText2(String mText2) 
        this.mText2 = mText2;
    
    public String getmText3() 
        return mText3;
    
    public void setmText3(String mText3) 
        this.mText3 = mText3;
    
    public String getmState() 
        return mState;
    
    public void setmState(String mState) 
        this.mState = mState;
    
    public String getDescription() 
        return mDescription;
    
    public void setDescription(String mDescription) 
        this.mDescription = mDescription;
    
 

【参考方案1】：

您应该使用 Pauze 和行 xml 创建两个 ViewHolder。并在 ItemViewType 中检查您的数据源中的文本值，并根据该 Inflate 特定的 ViewHolder。

这里有一些代码。

public int getItemViewType(int position) 
        if (products.size()==0)
            return 0;
        else if (viewFormat== Constants.listV)
            return Constants.listV;
        else if (viewFormat==Constants.gridV)
            return Constants.gridV;
        
        return super.getItemViewType(position);
    

和 ViewHolder：

public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
    
        if (viewType== Constants.gridV)
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.product_items,parent,false);
            return new MovieViewHolder(view);
        else if (viewType==Constants.listV)
        
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.linear_item_view,parent,false);
            return new OtherViewHolder(view);
        else
            return null;