android 中RecyclerView 嵌套了 GridView 的用法

绝地灬酷狼 2023-05-29 05:23 18阅读 0赞

提醒一下 RecyclerView 安卓自带的当中是没有的，所以需要导入包的。

android.support.v4.widget.SwipeRefreshLayout 中的v7,v4都已经变成 androidx了。希望大家注意

# android 由于升级 所以build.gradle中是添加， #

implementation 'androidx.recyclerview:recyclerview:1.0.0'
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.0.0'

如果版本较低的话，添加

implementation 'com.android.support:recyclerview-v7:28.0.0'

项目结构 ，写的比较复杂，没有嵌套 需求，本文章就不要看了。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1amluZzFfMQ_size_16_color_FFFFFF_t_70][]

# 五个布局文件 #

activity\_buttom.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" android:layout_width="match_parent"
        android:layout_height="match_parent">
    
        <TextView
            android:id="@+id/t1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextView" />
    
        <TextView
            android:id="@+id/t2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextView" />
    </LinearLayout>

activity\_grid.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" android:layout_width="match_parent"
        android:layout_height="match_parent">
    
        <GridView
            android:id="@+id/g1"
            android:layout_width="437dp"
            android:layout_height="match_parent"
            android:layout_marginBottom="140dp"
            android:horizontalSpacing="10dp"
            android:numColumns="4"
            android:verticalSpacing="10dp">
    
        </GridView>
    
    </LinearLayout>

activity\_griditem.xml

<?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">
    
    
        <View
            android:id="@+id/view"
            android:layout_width="89dp"
            android:layout_height="167dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.0" />
    
        <ImageView
            android:id="@+id/imageView"
            android:layout_width="89dp"
            android:layout_height="115dp"
            android:adjustViewBounds="true"
            app:layout_constraintBottom_toBottomOf="@+id/view"
            app:layout_constraintEnd_toEndOf="@+id/view"
            app:layout_constraintHorizontal_bias="0.571"
            app:layout_constraintStart_toStartOf="@+id/view"
            app:layout_constraintTop_toTopOf="@+id/view"
            app:layout_constraintVertical_bias="0.0"
            app:srcCompat="@mipmap/be" />
    
        <TextView
            android:id="@+id/t1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:ellipsize="end"
            android:singleLine="true"
            android:text="TextView11111111111111111111111111111"
            android:textColor="#050505"
            android:textSize="15dp"
            app:layout_constraintBottom_toBottomOf="@+id/view"
            app:layout_constraintEnd_toEndOf="@+id/imageView"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="@+id/imageView"
            app:layout_constraintTop_toBottomOf="@+id/imageView"
            app:layout_constraintVertical_bias="0.212" />
    
        <TextView
            android:id="@+id/t2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="28.1"
            android:textColor="#CC0000"
            android:textStyle="bold"
            android:textFontWeight="1000"
            app:layout_constraintBottom_toBottomOf="@+id/view"
            app:layout_constraintEnd_toEndOf="@+id/imageView"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="@+id/imageView"
            app:layout_constraintTop_toBottomOf="@+id/t1" />
    
    </androidx.constraintlayout.widget.ConstraintLayout>

activity\_main.xml

activity\_topitem.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:orientation="vertical" android:layout_width="match_parent"
        android:layout_height="match_parent">
    
    
        <ImageView
            android:id="@+id/imageView3"
            android:layout_width="match_parent"
            android:layout_height="59dp"
            app:srcCompat="@mipmap/ic_launcher" />
    </LinearLayout>

#  创建实体类 Taobao #

package com.example.myapplication.pojo;
    
    public class Taobao {
        private String name;
        private String information;
    
        @Override
        public String toString() {
            return "Taobao{" +
                    "name='" + name + '\'' +
                    ", information='" + information + '\'' +
                    '}';
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getInformation() {
            return information;
        }
    
        public void setInformation(String information) {
            this.information = information;
        }
    }

# 创建gridview适配器 #

#  创建recycleview 适配器（里面有viewHolder） #

package com.example.myapplication.MyAdapter;
    
    import android.content.Context;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.GridView;
    import android.widget.TextView;
    
    import androidx.annotation.NonNull;
    import androidx.recyclerview.widget.RecyclerView;
    
    
    import com.example.myapplication.R;
    import com.example.myapplication.pojo.Taobao;
    
    import java.util.List;
    
    public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
        List<Taobao> list;    //数据集合
        Context context;
        String path1;
        String path2;
        private LayoutInflater layoutInflater;
    
        public RecyclerViewAdapter(List<Taobao> list, Context context,String path1,String path2){
            this.list=list ;
           this.path1=path1;
           this.path2=path2;
            this.context = context;
        }
    
    //    这个方法是用来处理onCreateViewHolder方法中的viewtype 的
        @Override
        public int getItemViewType(int position) {
            System.out.println("getItemViewType  "+position);
            return position;
        }
    
    //    初始化item布局
        @NonNull
        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            RecyclerView.ViewHolder viewHolder=null;
            System.out.println("这里的 viewtype "+viewType);
            if(viewType==0){
                View view= LayoutInflater.from(context).inflate(R.layout.activity_topitem,parent,false);
                view.getLayoutParams().height=170;
                viewHolder=new TopHolder(view);
            }
            if(viewType==1){
                View view= LayoutInflater.from(context).inflate(R.layout.activity_grid,parent,false);
                viewHolder=new GridViewHolder(view);
            }
            if(viewType==2){
                View view= LayoutInflater.from(context).inflate(R.layout.activity_buttom,parent,false);
                view.getLayoutParams().height=100;
                viewHolder=new ButtomHolder(view);
            }
            return viewHolder;
        }
    
    //    处理每一个item 的地方,绑定数据
        @Override
        public void onBindViewHolder( RecyclerView.ViewHolder holder, int position) {
    
            System.out.println("onBindViewHolder" +position);
            if(position==0){
                System.out.println("yongl ");
                TopHolder topHolder=(TopHolder)holder;
            }
            if( position==1){
                System.out.println("yong2 ");
               GridViewHolder gridViewHolder=(GridViewHolder)holder;
               gridViewHolder.gridView.setAdapter(gridViewHolder.gridViewAdapter);
            }
            if( position==2){
                System.out.println("yong3 ");
                ButtomHolder buttomHolder=(ButtomHolder)holder;
                buttomHolder.t1.setText(path1);
                buttomHolder.t2.setText(path2);
            }
        }
    
    //    显示数量，因为我的布局文件就是三个，所以我返回san 
        @Override
        public int getItemCount() {
            return 3;
        }
    
        public class GridViewHolder extends RecyclerView.ViewHolder{
    
            public GridView gridView;
            public GridViewAdapter gridViewAdapter;
    
            public GridViewHolder(@NonNull View itemView) {
                super(itemView);
                gridView=itemView.findViewById(R.id.g1);
                gridViewAdapter=new GridViewAdapter(list,context);
            }
    
        }
        public class ButtomHolder extends RecyclerView.ViewHolder {
    
            public TextView t1;
            public TextView t2;
            public ButtomHolder(@NonNull View itemView) {
    
                super(itemView);
                t1=itemView.findViewById(R.id.t1);
                t2=itemView.findViewById(R.id.t2);
            }
        }
        public class TopHolder extends RecyclerView.ViewHolder {
    
            public TopHolder(@NonNull View itemView) {
                super(itemView);
            }
        }
    
    
    }

# 最后是mainactivity #

package com.example.myapplication;
    
    import androidx.annotation.NonNull;
    import androidx.appcompat.app.AppCompatActivity;
    import androidx.recyclerview.widget.GridLayoutManager;
    import androidx.recyclerview.widget.LinearLayoutManager;
    import androidx.recyclerview.widget.RecyclerView;
    import androidx.recyclerview.widget.RecyclerView.OnScrollListener;
    
    import android.graphics.Rect;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Toast;
    
    import com.example.myapplication.MyAdapter.RecyclerViewAdapter;
    import com.example.myapplication.pojo.Taobao;
    
    import java.util.ArrayList;
    import java.util.List;
    
    public class MainActivity extends AppCompatActivity {
    
    //    上面是 gridview 适配器
    
        private List<Taobao> taobaoList;
    
        private RecyclerViewAdapter recyclerViewAdapter;
        private RecyclerView recyclerView;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            initdata();
    
            recyclerView = findViewById(R.id.news_list);
    
            recyclerViewAdapter = new RecyclerViewAdapter(taobaoList, MainActivity.this, "num1", "num2");
            recyclerView.setLayoutManager(new GridLayoutManager(this, 1));
          下面配置RecyclerView 布局
    //        recyclerViewAdapter = new RecyclerViewAdapter(taobaoList, MainActivity.this);
            recyclerView.setAdapter(recyclerViewAdapter);
            recyclerView.addOnScrollListener(new OnScrollListener() {
                @Override
                public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
                    super.onScrollStateChanged(recyclerView, newState);
                    Toast.makeText(MainActivity.this, "下拉刷新", Toast.LENGTH_SHORT).show();
                }
    
                @Override
                public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
                    super.onScrolled(recyclerView, dx, dy);
                    Toast.makeText(MainActivity.this, "下拉刷新OnScrolled", Toast.LENGTH_SHORT).show();
                }
            });
    
    
        }
    
        public void initdata() {
            taobaoList = new ArrayList<>();
            String[] taobao_name = new String[]{
                    "蓝月亮洗衣液组合", "南方黑芝麻糊360*3袋", "鞋刷软毛刷鞋刷子不伤血", "ANN骑士靴女高筒2019秋冬平底鞋",
                    "凌平铺子-坚果大礼包", "黑麦片高纤维低脂", "君乐宝酸奶健存", "新品【三只松鼠】750g"
            };
            String[] taobao_price = new String[]{
                    "￥22.2", "￥332", "￥213", "￥99.9", "￥19.9", "￥234", "￥222", "￥999", "￥888"
            };
            for (int i = 0; i < 8; i++) {
                Taobao stu = new Taobao();
                stu.setName(taobao_name[i]);
                stu.setInformation(taobao_price[i]);
                taobaoList.add(stu);
            }
    
        }
    }

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