简介
使用RecyclerView实现网格布局，实现手机界面应用列表
效果
效果如下图：
详细代码
XML布局文件
在布局中使用RecyclerView控件
activity_main.xml
<&＃63;xml version="1.0" encoding="utf-8"&＃63;>
RecyclerView子项列表布局
recyclerview_item.xml
<&＃63;xml version="1.0" encoding="utf-8"&＃63;>
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 &＃63; 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 ListmList; 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();
}
}
});
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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