GridView(网格视图)应用场景代码

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends Activity implements OnItemClickListener{

    private int imgs[]={
    R.drawable.one,R.drawable.two,      
    R.drawable.three,R.drawable.four,       
    R.drawable.five,R.drawable.six,     
    R.drawable.seven,R.drawable.eight,      
    };
    private String[] names={"A","B","C","D","E","F","G","H"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //1.获得GridView
        GridView gv=(GridView)findViewById(R.id.gv01);
        //2.创建适配器对象
        GAdapter adapter=new GAdapter();
        //3.关联适配器对象
        gv.setAdapter(adapter);
        //4.添加点击事件
        gv.setOnItemClickListener(this);
    }

    class GAdapter extends BaseAdapter{

        @Override
        public int getCount() {
            return imgs.length;
        }

        /**返回具体某个item中的数据*/
        @Override
        public Object getItem(int position) {
            return imgs[position];
        }

        /**返回item的位置*/
        @Override
        public long getItemId(int position) {
            return position;
        }

        /**借助此方法构建item对象*/
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            //1.item view (列表项视图)
            RelativeLayout layout=(RelativeLayout) View.inflate(MainActivity.this,
            R.layout.grid_item_2, null);
            //2.item data (列表项数据)
            int imgId=imgs[position];
            String name=names[position];
            //3.将item data放到itemView上
            //3.1获得放图片和文本具体位置
            ImageView iv=(ImageView)layout.findViewById(R.id.img01);
            TextView tv=(TextView) layout.findViewById(R.id.tv01);
            iv.setImageResource(imgId);
            tv.setText(name);
            return layout;
        }
        
    }

    /**点击GridView中的某个item时会自动执行此方法*/
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
        //获得图片id
        int imgId=(Integer)parent.getItemAtPosition(position);
    }
}

<!--activity_main.xml-->
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/gv01"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:numColumns="2"
    android:horizontalSpacing="1dp"
    android:verticalSpacing="1dp"
    tools:context=".MainActivity" >
</GridView>

//适配器item view布局grid_item_2.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:background="#ff669900" >
    <ImageView 
        android:id="@+id/img01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:src="@drawable/one"
        />
    <TextView
        android:id="@+id/tv01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/img01"
        android:layout_centerHorizontal="true"
        android:text="2020"
        android:textColor="#FFFFFFFF" />
</RelativeLayout>