🍓🍓简述

最近因为需要所以学习了一下recycleview,使用Adapter修饰器修饰，使用一个Adapter+recycleview实现多种布局，而不是之前的三个Adapter在同一个recycleview中实现三个布局。点击区分布局中的gridview的图片和姓名。

嗯~，算是之前的在同一个recycleview中实现三个不同布局的升级版吧。因为之前使用了三个Adapter【修饰器】，而这个只是用了一个Adapter【修饰器】

🍓🍓效果图

动态图》》》

🍓🍓代码

🥭🥭AllAdapter.java

package Adapter;

import android.app.Activity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.lifecycle.GenericLifecycleObserver;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.example.layout_test.MainActivity;
import com.example.layout_test.R;

import org.jetbrains.annotations.NotNull;

import java.util.List;

import domain.FuritBean;

import static domain.msgcode.TYPE_1;
import static domain.msgcode.TYPE_2;
import static domain.msgcode.TYPE_3;

public class AllAdapter extends RecyclerView.Adapter<AllAdapter.ViewHolder> {
    private List<FuritBean> mFruitList;
    private RecyclerView mRecycleView;
    private OnItemClickListener mOnItemClickListener;
    public int Position1,Position2;
    private View View;

    class ViewHolder extends RecyclerView.ViewHolder{


        private final ImageView mfruitImage;
        private final TextView mfruitName;
        private final RecyclerView mRecycleView,mRecycleView2;

        public ViewHolder(@NonNull @NotNull View view) {
            super(view);
            mfruitImage=view.findViewById(R.id.mImg1);
            mfruitName=view.findViewById(R.id.mTv1);

            mRecycleView=view.findViewById(R.id.recycle_item);
            mRecycleView2=view.findViewById(R.id.recycle_item2);

    // todo 此处添加两个方法
    //添加一个OnItemClickListener接口，并且定义两个方法
    public interface OnItemClickListener{
        void onClick(int position1,int position2,View view);
    }

    //然后定义一个监听的方法，便于主类调用
    public void setOnItemListener(OnItemClickListener onItemListener){
        this.mOnItemClickListener = onItemListener;
    }





    // 构造方法
    public AllAdapter(List<FuritBean> mFruitList) {
        this.mFruitList = mFruitList;
    }

    // 获取布局类型，方便分类
    @Override
    public int getItemViewType(int position) {
        if (position ==1|| position ==4 || position==9){
            return TYPE_1;
        }
        else if(position == TYPE_2){
            return TYPE_2;
        }
        else {
            return TYPE_2;
        }
    }

//    @Override
//    public long getItemId(int position) {
//        return position;
//    }

    //  根据布局类型，返回不同的view  ViewHolder
    @NonNull
    @NotNull
    @Override
    public AllAdapter.ViewHolder onCreateViewHolder(@NonNull @NotNull ViewGroup parent, int viewType) {
        View view = null;
        ViewHolder viewHolder = null;
        switch (viewType){
            case TYPE_1:
                view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item1,parent,false);
                viewHolder=new ViewHolder(view);
                break;
            case TYPE_2:
                view=LayoutInflater.from(parent.getContext()).inflate(R.layout.item2,parent,false);
                viewHolder=new ViewHolder(view);


                break;
        }
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull @NotNull AllAdapter.ViewHolder holder, int position) {
        switch (getItemViewType(position)){
            case TYPE_1:
                ViewHolder viewHolder=holder;

                GridLayoutManager gridLayoutManager=new GridLayoutManager(viewHolder.mRecycleView.getContext(),5);
                viewHolder.mRecycleView.setLayoutManager(gridLayoutManager);
                FuritAdapter3 furitAdapter3=new FuritAdapter3(mFruitList,position);

                /**
                 * 取得数据
                 */
                furitAdapter3.FSetonclick(new FuritAdapter3.FuritSetOnclick() {
                    @Override
                    public void clickGetData(int position, int position2,View view) {

                        mOnItemClickListener.onClick(position,position2,view);
                    }
                });

                viewHolder.mRecycleView.setAdapter(furitAdapter3);

                break;

            case TYPE_2:
                ViewHolder viewHolder2=holder;
                FuritBean furit1=mFruitList.get(position);
                viewHolder2.mfruitImage.setImageResource(furit1.getImageId());
                viewHolder2.mfruitName.setText(furit1.getName());
                break;
            default:
                break;
        }
    }



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

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🥭🥭 FuritAdapter3.java

package Adapter;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.example.layout_test.R;

import org.jetbrains.annotations.NotNull;

import java.util.List;

import domain.FuritBean;

public class FuritAdapter3 extends RecyclerView.Adapter<FuritAdapter3.ViewHolder> {
    private List<FuritBean> mFruitList;
    private FuritSetOnclick furitSetOnclick;
    private int position2;

    static class ViewHolder extends RecyclerView.ViewHolder{
        private final ImageView mfruitImage;
        private final TextView mfruitName;

        public ViewHolder(@NonNull @NotNull View itemView) {
            super(itemView);
            mfruitImage= itemView.findViewById(R.id.mImg3);
            mfruitName = itemView.findViewById(R.id.mTv3);


        }
    }

    public FuritAdapter3(List<FuritBean> mFruitList, int position) {
        this.mFruitList = mFruitList;
        this.position2 = position;

    }



    @NonNull
    @Override
    public FuritAdapter3.ViewHolder onCreateViewHolder(@NonNull @NotNull ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.recycle_item3,parent,false);
        ViewHolder viewHolder=new ViewHolder(view);

        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull @NotNull FuritAdapter3.ViewHolder holder, int position) {
        FuritBean furit=mFruitList.get(position);
        holder.mfruitImage.setImageResource(furit.getImageId());
        holder.mfruitName.setText(furit.getName());


        holder.mfruitImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                furitSetOnclick.clickGetData(position2,position,holder.mfruitImage);
            }
        });
        holder.mfruitName.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                furitSetOnclick.clickGetData(position2,position,holder.mfruitName);
            }
        });
    }

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


    //  定义一个监听接口，里面有两个方法
    public interface FuritSetOnclick{
        void clickGetData(int position,int position2,View view);
    }

    //给监听一个构造函数，提供给  MainActivity  调用
    public void FSetonclick(FuritSetOnclick furitSetOnclick){
        this.furitSetOnclick=furitSetOnclick;
    }
}

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🥭🥭MainActivity.java(主函数)

package Adapter;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.example.layout_test.R;

import org.jetbrains.annotations.NotNull;

import java.util.List;

import domain.FuritBean;

public class FuritAdapter3 extends RecyclerView.Adapter<FuritAdapter3.ViewHolder> {
    private List<FuritBean> mFruitList;
    private FuritSetOnclick furitSetOnclick;
    private int position2;

    static class ViewHolder extends RecyclerView.ViewHolder{
        private final ImageView mfruitImage;
        private final TextView mfruitName;

        public ViewHolder(@NonNull @NotNull View itemView) {
            super(itemView);
            mfruitImage= itemView.findViewById(R.id.mImg3);
            mfruitName = itemView.findViewById(R.id.mTv3);


        }
    }

    public FuritAdapter3(List<FuritBean> mFruitList, int position) {
        this.mFruitList = mFruitList;
        this.position2 = position;

    }



    @NonNull
    @Override
    public FuritAdapter3.ViewHolder onCreateViewHolder(@NonNull @NotNull ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.recycle_item3,parent,false);
        ViewHolder viewHolder=new ViewHolder(view);


        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull @NotNull FuritAdapter3.ViewHolder holder, int position) {
        FuritBean furit=mFruitList.get(position);
        holder.mfruitImage.setImageResource(furit.getImageId());
        holder.mfruitName.setText(furit.getName());


        holder.mfruitImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                furitSetOnclick.clickGetData(position2,position,holder.mfruitImage);
            }
        });
        holder.mfruitName.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                furitSetOnclick.clickGetData(position2,position,holder.mfruitName);
            }
        });
    }

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


    //  定义一个监听接口，里面有两个方法
    public interface FuritSetOnclick{
        void clickGetData(int position,int position2,View view);
    }

    //给监听一个构造函数，提供给  MainActivity  调用
    public void FSetonclick(FuritSetOnclick furitSetOnclick){
        this.furitSetOnclick=furitSetOnclick;
    }
}

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🥭🥭FuritBean.java（对象的属性）

package domain;

public class FuritBean {
    private String name;
    private int ImageId;

    public String getName() {
        return name;
    }


    public int getImageId() {
        return ImageId;
    }




    public FuritBean(String name, int imageId) {
        this.name = name;
        ImageId = imageId;
    }
}

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🥭🥭msgcode.java(一些常量抽取出来)

package domain;

public class msgcode {
    public static final int TYPE_1=0;
    public static final int TYPE_2=5;
    public static final int TYPE_3=6;
}

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🥭🥭传值

因为同一个recycleView实现多种布局，其中就有gridview【九宫格布局】。要想在同一个recycleview实现多种布局，而且还要实现每个gridview的监听，常规的办法肯定是不行的。

这就涉及到嵌套了。那么嵌套怎么从最里层的gridview传出每一个小格子中的图片点击和名称点击呢？ 当然使用接口了，具体可以看代码，建议掌握，Android这样的场景太多太多。

虽然gridview传出每一个小格子中的图片点击和名称点击的view不同，可以使用view.getId进行区分，具体效果看上面截图。

🍓🍓xml布局

🍗🍗activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:orientation="vertical">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycle_view1"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="400dp">
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycle_view2"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycle_view3"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginLeft="40dp"/>

    </LinearLayout>

</LinearLayout>
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🍗🍗item1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycle_item"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginLeft="30dp">

        </androidx.recyclerview.widget.RecyclerView>
</LinearLayout>

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🍗🍗item2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <TextView
            android:id="@+id/mTv1"
            android:layout_width="match_parent"
            android:layout_height="30dp"
            android:gravity="center"
            android:layout_gravity="center"/>
        <ImageView
            android:id="@+id/mImg1"
            android:layout_width="50dp"
            android:layout_height="50dp" />
    </LinearLayout>
</LinearLayout>
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🍗🍗item3.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycle_item2"
        android:layout_width="match_parent"
        android:layout_height="80dp">

    </androidx.recyclerview.widget.RecyclerView>
</LinearLayout>
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🍗🍗recycle_item3.xml

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

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_gravity="center">

        <ImageView
            android:id="@+id/mImg3"
            android:layout_width="50dp"
            android:layout_height="50dp" />

        <TextView
            android:id="@+id/mTv3"
            android:layout_width="50dp"
            android:layout_height="30dp"
            android:gravity="center"
            android:textColor="#FFFF0000"/>
    </LinearLayout>

</LinearLayout>
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最后一步，别忘了导入recycleview的依赖

implementation 'androidx.recyclerview:recyclerview:1.1.0'
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