🍓🍓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】

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🍓🍓效果图

动态图》》》

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

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🍓🍓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"><LinearLayoutandroid:layout_width="match_parent"android:layout_height="80dp"android:orientation="vertical"><androidx.recyclerview.widget.RecyclerViewandroid:id="@+id/recycle_view1"android:layout_width="match_parent"android:layout_height="match_parent" /></LinearLayout><LinearLayoutandroid:layout_width="match_parent"android:layout_height="400dp"><androidx.recyclerview.widget.RecyclerViewandroid:id="@+id/recycle_view2"android:layout_width="match_parent"android:layout_height="match_parent"/></LinearLayout><LinearLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><androidx.recyclerview.widget.RecyclerViewandroid: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.RecyclerViewandroid: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"><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="match_parent"android:orientation="vertical"><TextViewandroid:id="@+id/mTv1"android:layout_width="match_parent"android:layout_height="30dp"android:gravity="center"android:layout_gravity="center"/><ImageViewandroid: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.RecyclerViewandroid: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"><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="vertical"android:layout_gravity="center"><ImageViewandroid:id="@+id/mImg3"android:layout_width="50dp"android:layout_height="50dp" /><TextViewandroid: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'