GridView的使用

 Adapter：

public class ImageAdapter extends BaseAdapter{

 private Context mContext;
 
 private Integer[] mImageIds = {
   R.drawable.img1,
   R.drawable.img2,
   R.drawable.img3,
   R.drawable.img4,
   R.drawable.img1,
   R.drawable.img2,
   R.drawable.img3,
   R.drawable.img4,
   R.drawable.img1,
   R.drawable.img2,
   R.drawable.img3,
   R.drawable.img4,
   R.drawable.img1,
   R.drawable.img2,
   R.drawable.img3,
   R.drawable.img4
 };
 
 
 public ImageAdapter(Context c){
  mContext = c;
 }
 
 @Override
 public int getCount() {
  // TODO Auto-generated method stub
  return mImageIds.length;
 }

 @Override
 public Object getItem(int position) {
  // TODO Auto-generated method stub
  return position;
 }

 @Override
 public long getItemId(int position) {
  // TODO Auto-generated method stub
  return position;
 }

 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  // TODO Auto-generated method stub
  ImageView imageView;        
  if (convertView == null) {           
   imageView = new ImageView(mContext);     
   //设置ImageView宽高  
   imageView.setLayoutParams(new GridView.LayoutParams(90, 90));
            
   imageView.setAdjustViewBounds(false);            
   imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);            
   imageView.setPadding(8, 8, 8, 8);         }
  else {            
   imageView = (ImageView) convertView;        
   }         
  imageView.setImageResource(mImageIds[position]);         
  return imageView;
  }

}

Acitivity：

public class mainActivity extends Activity {
 
 private GridView iGridView;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       
       
        iGridView = new GridView(this);
        //设置Grid列数，为自动
        iGridView.setNumColumns(GridView.AUTO_FIT);
        //设置Grid列宽
        iGridView.setColumnWidth(90);
        //设置Grid行距
        iGridView.setVerticalSpacing(20);
       
        iGridView.setAdapter(new ImageAdapter(this));
       
        setContentView(iGridView);
    }
}