Android 控件系列： GridView 的简单使用

要做gridview 首先我们要做的有三点：

1. xml中添加 GridView 控件

2. 继承BaseAdapter 类

3. 载入数据到GridView

1. xml 中添加 GridView控件

android:columnWidth 该属性表示每个项的宽度

android:numColumns 该属性表示自动排列项

2. 继承BaseAdapter类

public class GridViewAdapter extends BaseAdapter{//private ArrayList mIndexList;private ArrayList mDrawables;private int mWidth;private int mHeight;private Context mContext;public GridViewAdapter(Context context, ArrayList drawables, int width, int height){//mIndexList = indexList;mDrawables = drawables;mWidth= width;mHeight = height;mContext= context;}@Overridepublic int getCount(){// TODO Auto-generated method stubreturn mDrawables.size();}@Overridepublic Object getItem(int position){// TODO Auto-generated method stubreturn position;}@Overridepublic long getItemId(int position){// TODO Auto-generated method stubreturn position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent){ImageView img;if(convertView == null){img = new ImageView(mContext);img.setScaleType(ImageView.ScaleType.FIT_CENTER);img.setLayoutParams(new GridView.LayoutParams(mWidth, mHeight));}else {img = (ImageView)convertView;}img.setImageDrawable(mDrawables.get(position));return img;}}

3. 载入数据到GridView

private void addData(){ArrayList drawables = new ArrayList();int nCount = 50;  //GridView要放入图标的总数量for(int i = 0; i < nCount; i++){drawables.add(mContext.getResources().getDrawable(R.drawable.icon));}GridViewAdapter gridViewAdapter = new GridViewAdapter(mContext, drawables, 48, 48);mGridView.setAdapter(gridViewAdapter);}

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