java - recyclerView每个列表中的onClick

Question

我在布局中设置了 2 个 recyclerView，并使用 arraylist 在该 recyclerView 中传递数据。我试图在不同 recyclerview 的每个数组列表中设置 clickListener。

这是适配器

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.RecyclerViewHolder>{
    Context context;
    int LayoutId;
    List<ItemModel> data;

    private OnNoteClickListener mOnNoteClickListener;

    public RecyclerAdapter(Context context, int layoutId, List<ItemModel> data, OnNoteClickListener onNoteClickListener) {
        this.context = context;
        LayoutId = layoutId;
        this.data = data;
        this.mOnNoteClickListener = onNoteClickListener;
    }

    public RecyclerAdapter(MainActivity mainActivity, int item_layout_vertical, List<ItemModel> topRecycleData) {
    }

    @NonNull
    @Override
    public RecyclerViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View myView = inflater.inflate(LayoutId,null);
        return new RecyclerViewHolder(myView, mOnNoteClickListener);
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerViewHolder holder, int position) {
        final ItemModel singleItem = data.get(position);
        holder.imgTitle.setText(singleItem.getImgTitle());
        holder.img.setImageDrawable(context.getResources().getDrawable(singleItem.getImgId()));
    }

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

    public class RecyclerViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
        OnNoteClickListener onNoteClickListener;
        TextView imgTitle;

        ImageView img;
        public RecyclerViewHolder(@NonNull View itemView, OnNoteClickListener onNoteClickListener) {
            super(itemView);
            imgTitle = itemView.findViewById(R.id.imgTitle);
            img = itemView.findViewById(R.id.img);
            this.onNoteClickListener = onNoteClickListener;

            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            onNoteClickListener.onNoteClick(getAdapterPosition());
        }
    }

    public interface OnNoteClickListener{
        void onNoteClick(int positon);
    }

}

这是显示 recyclerview 的 Activity :

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Fetching View From XMl
        topRecyclerView = findViewById(R.id.topRecyclerView);
        bottomRecyclerView = findViewById(R.id.bottomRecyclerView);

        // Data For Top Recycler Views
        List<ItemModel> topRecycleData = new ArrayList<ItemModel>();
        topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 1"));
        topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 2"));

        // Data For Bottom Recycler Views
        List<ItemModel> bottomRecycleData = new ArrayList<ItemModel>();
        bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 1"));
        bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 2"));
        bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 3"));
        bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 4"));


        // Setting Layouts To Recycler Views
        topRecyclerView.setLayoutManager(new GridLayoutManager(this,2));
        bottomRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayout.HORIZONTAL,false));

        // Creating Adapters
        RecyclerAdapter topAdapter = new RecyclerAdapter(MainActivity.this,R.layout.item_layout_vertical,topRecycleData);
        RecyclerAdapter bottomAdapter = new RecyclerAdapter(MainActivity.this,R.layout.item_layout_horizontal,bottomRecycleData);

        // Setting Adapters To Layouts
        topRecyclerView.setAdapter(topAdapter);
        bottomRecyclerView.setAdapter(bottomAdapter);

    }

}

如果有一个回收器 View ，那么我希望我能做到这一点，但这次家里有 2 个回收器 View ，有 2 个不同的 arrylist。所以我很困惑如何为recyclerview的两个不同的数组列表调用监听器。

我想在单击第一个回收器 View 上的“例如”位置 2 时生成 toast 消息，并在单击第二个回收器 View 的位置 1 时生成 toast 消息。

Answer 1

这是包含所有更改的完整代码。我已经测试了你的代码，它运行良好。

MainActivity Java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity{

RecyclerView topRecyclerView, bottomRecyclerView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_test_main);
    // Fetching View From XMl
    topRecyclerView = findViewById(R.id.topRecyclerView);
    bottomRecyclerView = findViewById(R.id.bottomRecyclerView);

    // Data For Top Recycler Views
    List<ItemModel> topRecycleData = new ArrayList<ItemModel>();
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 1"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 2"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 3"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 4"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 5"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 6"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 7"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 8"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 9"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 10"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 11"));
    topRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 12"));


    // Data For Bottom Recycler Views
    List<ItemModel> bottomRecycleData = new ArrayList<ItemModel>();
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 1"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 2"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 3"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 4"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 5"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 6"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 7"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 8"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 9"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 10"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 11"));
    bottomRecycleData.add(new ItemModel(R.mipmap.ic_launcher,"Img 12"));

    // Setting Layouts To Recycler Views
    topRecyclerView.setLayoutManager(new GridLayoutManager(this,2));
    bottomRecyclerView.setLayoutManager(new LinearLayoutManager(this));

    // Creating Adapters (No need to send onNote)
    RecyclerAdapter topAdapter = new RecyclerAdapter
    (this,R.layout.item_layout_vertical,topRecycleData);
    RecyclerAdapter bottomAdapter = new RecyclerAdapter
    (this,R.layout.item_layout_horizontal,bottomRecycleData);

    // Setting Adapters To Layouts
    topRecyclerView.setAdapter(topAdapter);
    bottomRecyclerView.setAdapter(bottomAdapter);
}
}

MainActivity XML 使用 Scoll View 和线性布局，并在内部线性布局上使用权重，以在屏幕高度上均匀缩放它们。在您的代码中，顶部布局被底部布局隐藏。 ScrollView 必须包含一个 subview ，这就是为什么添加额外的线性布局作为 ScrollView 的 subview 。

<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true"
android:layout_alignParentTop="true"
android:scrollbars="none"
android:fillViewport="true">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:weightSum="2">

<LinearLayout
    android:layout_margin="5dp"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    >
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#4CE9D9"
        android:text="Header No 1"
        android:textSize="18sp"
        android:textColor="#000"
        android:padding="5dp"/>
    <android.support.v7.widget.RecyclerView
        android:id="@+id/topRecyclerView"
        android:layout_marginTop="5dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>


<LinearLayout
    android:id="@+id/bottomRecyclerViewLayout"
    android:layout_margin="5dp"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    >
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#4CE9D9"
        android:text="Header No 2"
        android:textSize="18sp"
        android:textColor="#000"
        android:padding="5dp"/>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/bottomRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>
</LinearLayout>
</ScrollView>

item_layout_vertical xml 添加一个 id 到顶部布局，稍后将用于设置 onclick 监听器。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="@+id/verticalContainer"
android:padding="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<ImageView
    android:id="@+id/img"
    android:layout_gravity="center_horizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@mipmap/ic_launcher"/>

<TextView
    android:id="@+id/imgTitle"
    android:layout_marginTop="5dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="20sp"
    android:textColor="#000"
    android:textStyle="bold"
    android:text="Hello Dear Dibas"/>

</LinearLayout>

item_layout_horizo​​ntal xml 添加一个 id 到顶部布局，稍后将用于设置 onclick 监听器。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/horizontalContainer"
android:orientation="vertical"
android:padding="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<ImageView
    android:id="@+id/img"
    android:layout_gravity="center_horizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@mipmap/ic_launcher"/>

<TextView
    android:id="@+id/imgTitle"
    android:layout_marginTop="5dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="20sp"
    android:textColor="#000"
    android:textStyle="bold"
    android:text="Hello Dear Dibas"/>

</LinearLayout>

RecyclerAdapter Java

import android.content.Context;
import android.support.annotation.NonNull;
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.LinearLayout;
import android.widget.TextView;
import java.util.List;

public class RecyclerAdapter extends 
RecyclerView.Adapter<RecyclerAdapter.RecyclerViewHolder>{

Context context;
int LayoutId;
List<ItemModel> data;


public RecyclerAdapter(Context context, int layoutId, List<ItemModel> data) {
    this.context = context;
    LayoutId = layoutId;
    this.data = data;
}

@NonNull
@Override
public RecyclerViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int 
viewType) {
    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    View myView = inflater.inflate(LayoutId,null);
    return new RecyclerViewHolder(myView);
}

@Override
public void onBindViewHolder(@NonNull RecyclerViewHolder holder, final int 
position) {
    final ItemModel singleItem = data.get(position);
    holder.imgTitle.setText(singleItem.getImgTitle());
    holder.img.setImageDrawable(context.getResources()
   .getDrawable(singleItem.getImgId()));

   //checking which layout is in layoutId and adding onclick listener
    if (LayoutId == R.layout.item_layout_horizontal)
    {
        holder.horizontalLayout.setOnClickListener(new View.OnClickListener() 
        {
            @Override
            public void onClick(View view) {
                //check which item is clicked here and proceed
                if(position==0)
                {
                    //do something
                }
                else if(position==1)
                {
                     //do something
                }
                else if(position==2)
                {
                    //do something
                }
                //and so on to the list end

            }
        });
    }

    else {
        holder.verticalLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //check which item is clicked here and proceed
                if(position==0)
                {
                    //do something
                }
                else if(position==1)
                {
                    //do something
                }
                else if(position==2)
                {
                    //do something
                }
                //and so on to the list end

            }
        });
    }

    }

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

public class RecyclerViewHolder extends RecyclerView.ViewHolder{
    TextView imgTitle;
    ImageView img;
    LinearLayout horizontalLayout,verticalLayout;
    public RecyclerViewHolder(@NonNull View itemView) {
        super(itemView);
        imgTitle = itemView.findViewById(R.id.imgTitle);
        img = itemView.findViewById(R.id.img);
        //fetching the container views that are to be attached to the 
        //recycler view and for adding onclick listeners 
        //(because of multiple layouts for the same adapter)
        if(LayoutId==R.layout.item_layout_horizontal)

            horizontalLayout=itemView.findViewById(R.id.horizontalContainer);
        else

            verticalLayout=itemView.findViewById(R.id.verticalContainer);

        }

        } 
}

希望这有帮助。它运行良好。在点击监听器条件中添加 toast 以验证它们是否适用于确切位置。需要注意的是，位置索引从 0(第一项)开始，依此类推。