Android开发中GridView用法示例

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{  // 定义Context  private Context   mContext;  // 定义整型数组 即图片源  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;  }  // 获取图片的个数  public int getCount()  {    return mImageIds.length;  }  // 获取图片在库中的位置  public Object getItem(int position)  {    return position;  }  // 获取图片ID  public long getItemId(int position)  {    return position;  }  public View getView(int position, View convertView, ViewGroup parent)  {    ImageView imageView;    if (convertView == null)    {      // 给ImageView设置资源      imageView = new ImageView(mContext);      // 设置布局 图片120×120显示      imageView.setLayoutParams(new GridView.LayoutParams(85, 85));      // 设置显示比例类型      imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);    }    else    {      imageView = (ImageView) convertView;    }    imageView.setImageResource(mImageIds[position]);    return imageView;  }}