package com.yarin.android.Examples_04_19;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.GridView;import android.widget.ImageView;public class ImageAdapter extends BaseAdapter{  // 定義Context  private Context   mContext;  // 定義整型數組 即圖片源  private Integer[]  mImageIds  =  {      R.drawable.img1,      R.drawable.img2,      R.drawable.img3,      R.drawable.img4,      R.drawable.img5,      R.drawable.img6,      R.drawable.img7,      R.drawable.img8,      R.drawable.img1,  };  public ImageAdapter(Context c)  {    mContext = c;  }  // 獲取圖片的個數  public int getCount()  {    return mImageIds.length;  }  // 獲取圖片在庫中的位置  public Object getItem(int position)  {    return position;  }  // 獲取圖片ID  public long getItemId(int position)  {    return position;  }  public View getView(int position, View convertView, ViewGroup parent)  {    ImageView imageView;    if (convertView == null)    {      // 給ImageView設置資源      imageView = new ImageView(mContext);      // 設置布局 圖片120×120顯示      imageView.setLayoutParams(new GridView.LayoutParams(85, 85));      // 設置顯示比例類型      imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);    }    else    {      imageView = (ImageView) convertView;    }    imageView.setImageResource(mImageIds[position]);    return imageView;  }}

package com.yarin.android.Examples_04_19;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.GridView;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;public class Activity01 extends Activity{  /** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState)  {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    //取得GridView對象    GridView gridview = (GridView) findViewById(R.id.gridview);    //添加元素給gridview    gridview.setAdapter(new ImageAdapter(this));    // 設置Gallery的背景    gridview.setBackgroundResource(R.drawable.bg0);    //事件監聽    gridview.setOnItemClickListener(new OnItemClickListener() {      public void onItemClick(AdapterView<?> parent, View v, int position, long id)      {        Toast.makeText(Activity01.this, "你選擇了" + (position + 1) + " 號圖片", Toast.LENGTH_SHORT).show();      }    });  }}

<?xml version="1.0" encoding="utf-8"?><GridView xmlns:android="http://schemas.android.com/apk/res/android"  android:id="@+id/gridview"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:numColumns="auto_fit"  android:verticalSpacing="10dp"  android:horizontalSpacing="10dp"  android:columnWidth="90dp"  android:stretchMode="columnWidth"  android:gravity="center"/>