详细代码

XML布局文件

在布局中使用RecyclerView控件

activity_main.xml

RecyclerView子项列表布局

recyclerview_item.xml

JAVA代码

MainActivity

package com.matt.recyclerview; import androidx.appcompat.app.AppCompatActivity;import androidx.recyclerview.widget.GridLayoutManager;import androidx.recyclerview.widget.RecyclerView; import android.os.Bundle; import java.util.ArrayList;import java.util.List; public class MainActivity extends AppCompatActivity {   private RecyclerView mRecyclerView;  private GridAdapter mGridAdapter;  private List mApplyList;   @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    mRecyclerView = findViewById(R.id.recyclerview);    mApplyList = new ArrayList<>();    mApplyList.add(new ApplyBean("SETTINGS","设置", R.mipmap.ic_launcher));    mApplyList.add(new ApplyBean("CALCULATOR","计算器", R.mipmap.ic_launcher));    mApplyList.add(new ApplyBean("WEATHER","天气", R.mipmap.ic_launcher));    mApplyList.add(new ApplyBean("CALENDAR","日历", R.mipmap.ic_launcher));    mApplyList.add(new ApplyBean("PHOTO" ,"相册", R.mipmap.ic_launcher));    mApplyList.add(new ApplyBean("TIME" ,"时钟", R.mipmap.ic_launcher));    mApplyList.add(new ApplyBean("FM" ,"收音机", R.mipmap.ic_launcher));    mApplyList.add(new ApplyBean("CAMERA" ,"相机", R.mipmap.ic_launcher));    mApplyList.add(new ApplyBean("PLAY","播放器", R.mipmap.ic_launcher));    mGridAdapter = new GridAdapter(mApplyList);     //这里的第二个参数4代表的是网格的列数    mRecyclerView.setLayoutManager(new GridLayoutManager(this, 3));    mRecyclerView.setAdapter(mGridAdapter);  }}

RecyclerView适配器GridAdapter

package com.fenda.homepage.Adapter; 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.TextView;  import com.fenda.homepage.R;import com.fenda.homepage.bean.ApplyBean; import java.util.List; /** * @author：Matt.Liao * 日期时间: 2019/9/1 17:45 * 内容描述: * 版本： * 包名： */public class GridAdapter extends RecyclerView.Adapter{  private List mList;  private RecyclerView recyclerView;  public GridAdapter(List list){    this.mList = list;  }   @Override  public Holder onCreateViewHolder(ViewGroup parent, int viewType) {    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.submenu_item_recyclerview, null);    final Holder holder = new Holder(view);    //对加载的子项注册监听事件    holder.fruitView.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View view) {        int position = holder.getAdapterPosition();        String applyId = mList.get(position).getApplyId();        onItemClickListener.onItemClick(view ,applyId);      }    });    return holder;  }   @Override  public void onBindViewHolder(Holder holder, int position) {    holder.mApplyNameTv.setText(mList.get(position).getApplyName());    holder.mApplyImageIv.setImageResource(mList.get(position).getApplyImage());  }   @Override  public int getItemCount() {    return mList == null ? 0 : mList.size();  }    private OnItemClickListener onItemClickListener;  public void setOnItemClickListener(OnItemClickListener onItemClickListener){    this.onItemClickListener = onItemClickListener;  }   /**   * 定义RecyclerView选项单击事件的回调接口   */  public interface OnItemClickListener{     /**     * @param view 当前单击的View     * @param applyId 单击的View的应用id     */    void onItemClick(View view, String applyId);  }   class Holder extends RecyclerView.ViewHolder {    private TextView mApplyNameTv;    private ImageView mApplyImageIv;    private View fruitView;  //表示我们自定义的控件的视图    public Holder(View itemView) {      super(itemView);      fruitView = itemView;      mApplyNameTv = itemView.findViewById(R.id.tv_apply_name);      mApplyImageIv = itemView.findViewById(R.id.iv_apply_image);    }  }}

应用列表实体类ApplyBean

package com.matt.recyclerview; import android.os.Parcel;import android.os.Parcelable; /** * @author matt.liaojianpeng * 日期时间: 2019/9/1 16:31 * 内容描述: * 版本： * 包名： */public class ApplyBean{  private String applyId;  private String applyName;  private int applyImage;   public String getApplyId() {    return applyId;  }   public void setApplyId(String applyId) {    this.applyId = applyId;  }   public ApplyBean(String applyName, int applyImage){    this.applyName = applyName;    this.applyImage = applyImage;  }  public ApplyBean(String applyId , String applyName, int applyImage){    this.applyId = applyId;    this.applyName = applyName;    this.applyImage = applyImage;  }  public ApplyBean() {  }   public String getApplyName() {    return applyName;  }   public void setApplyName(String applyName) {    this.applyName = applyName;  }   public int getApplyImage() {    return applyImage;  }   public void setApplyImage(int applyImage) {    this.applyImage = applyImage;  }  public ApplyBean(Parcel source) {    applyId = source.readString();    applyName = source.readString();     applyImage = source.readInt();  }}

详细讲解

设置RecyclerView适配器

//这里的第二个参数3代表的是网格的列数mRecyclerView.setLayoutManager(new GridLayoutManager(this, 3));mRecyclerView.setAdapter(mGridAdapter);

可以设置的一些参数，说明如下:

setLayoutManager设置RecyclerView布局样式

GridLayoutManager：网格布局

LinearLayoutManager：线性布局

适配器GridAdapter继承RecyclerView.Adapter

初始化

重写构造方法，传入子项数据列表

private List mList;  private RecyclerView recyclerView;  public GridAdapter(List list){    this.mList = list;  }

内部类Holder用于绑定数据类型

class Holder extends RecyclerView.ViewHolder {    private TextView mApplyNameTv;    private ImageView mApplyImageIv;    private View fruitView;  //表示我们自定义的控件的视图    public Holder(View itemView) {      super(itemView);      fruitView = itemView;      mApplyNameTv = itemView.findViewById(R.id.tv_apply_name);      mApplyImageIv = itemView.findViewById(R.id.iv_apply_image);    }  }

onCreateViewHolder()方法，负责承载每个子项的布局。

onBindViewHolder()方法，负责将每个子项holder绑定数据。

getItemCount()方法，返回子项列表数目。

setOnItemClickListener()方法，设置子项列表监听。

OnItemClickListener()接口，定义RecyclerView选项单击事件的回调接口。

子项监听实现的方法，如下

mGridAdapter.setOnItemClickListener(new GridAdapter.OnItemClickListener() {      @Override      public void onItemClick(View view, String applyId) {        if(applyId.equals("SETTINGS")){          Toast.makeText(getApplicationContext(),"设置",Toast.LENGTH_SHORT).show();        } else if (applyId.equals("CALCULATOR")){          Toast.makeText(getApplicationContext(),"计算器",Toast.LENGTH_SHORT).show();        }      }    });