Android studio之GridView使用

效果图：

代码：

UserGridviewAdapter

package com.example.gridviewpro.Adapter;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.gridviewpro.R;
import com.example.gridviewpro.bean.UserGridviewBean;

import java.util.List;

public class UserGridviewAdapter extends BaseAdapter {
    
    
    private Context mContext;
    private List<UserGridviewBean> mUserGridviewBeanList;

    public UserGridviewAdapter(Context context, List<UserGridviewBean> userGridviewBeanList) {
    
    
        mContext = context;
        mUserGridviewBeanList = userGridviewBeanList;
    }

    @Override
    public int getCount() {
    
    
        return mUserGridviewBeanList == null ? 0 : mUserGridviewBeanList.size();
    }

    @Override
    public Object getItem(int i) {
    
    
        return getItem(i);
    }

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
    
    
        ViewHolder viewHolder;
        if (view == null) {
    
    
            view = View.inflate(mContext, R.layout.gridview_item, null);
            viewHolder = new ViewHolder(view);
            view.setTag(viewHolder);
        } else {
    
    
            viewHolder = (ViewHolder) view.getTag();
        }
        UserGridviewBean userGridviewBean = mUserGridviewBeanList.get(i);
        viewHolder.mImageView.setImageResource(R.drawable.img);
        viewHolder.mUserName.setText(userGridviewBean.getUserName());
        viewHolder.mPower.setText(String.valueOf(userGridviewBean.getPower()));
        return view;
    }

    static
    class ViewHolder {
    
    
        View mView;
        ImageView mImageView;
        TextView mUserName;
        TextView mPower;

        ViewHolder(View view) {
    
    
            this.mView = view;
            this.mImageView = (ImageView) view.findViewById(R.id.img);
            this.mUserName = (TextView) view.findViewById(R.id.userName);
            this.mPower = (TextView) view.findViewById(R.id.power);
        }
    }
}

UserGridviewBean

package com.example.gridviewpro.bean;

public class UserGridviewBean {
    
    
    private int mImage;
    private String mUserName;
    private int mPower;

    public UserGridviewBean(int image, String userName, int power) {
    
    
        mImage = image;
        mUserName = userName;
        mPower = power;
    }

    public int getImage() {
    
    
        return mImage;
    }

    public void setImage(int image) {
    
    
        mImage = image;
    }

    public String getUserName() {
    
    
        return mUserName;
    }

    public void setUserName(String userName) {
    
    
        mUserName = userName;
    }

    public int getPower() {
    
    
        return mPower;
    }

    public void setPower(int power) {
    
    
        mPower = power;
    }
}

MainActivity

package com.example.gridviewpro;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.Toast;

import com.example.gridviewpro.Adapter.UserGridviewAdapter;
import com.example.gridviewpro.bean.UserGridviewBean;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    
    
    private List<UserGridviewBean> mUserGridviewBeanList = new ArrayList<>();
    private GridView mGridView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        DateResourse();
        mGridView = findViewById(R.id.gv);
        mGridView.setAdapter(new UserGridviewAdapter(MainActivity.this, mUserGridviewBeanList));
        //监控item点击情况
        mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    
    
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
    
    
                Toast.makeText(MainActivity.this, mUserGridviewBeanList.get(i).getUserName(), Toast.LENGTH_SHORT).show();
            }
        });
    }

    private void DateResourse() {
    
    
        for (int i = 0; i < 100; i++) {
    
    
            mUserGridviewBeanList.add(new UserGridviewBean(R.drawable.img, "张三" + i, 100 + i));
        }
    }
}

item

<?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">
<ImageView
    android:id="@+id/img"
    android:layout_width="60dp"
    android:layout_height="60dp"
    android:layout_gravity="center"/>
    <TextView
        android:id="@+id/userName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="10sp"
        android:layout_gravity="center"/>

    <TextView
        android:id="@+id/power"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="10sp"
        android:layout_gravity="center"/>
</LinearLayout>

activity_main.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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <GridView
        android:id="@+id/gv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:numColumns="4"/>
</LinearLayout>