GridView 子项长度和宽度一样

下面是gridview 控件，每行放置四个,因此用宽度除4. 下面展现出来的的界面就显的比较美观。

public class HotSearchAdapter extends BaseAdapter {private LayoutInflater inflater;private List<App> infos;private Context context;public HotSearchAdapter(Context context, List<App> infos) {super();this.infos = infos;this.context = context;this.inflater = LayoutInflater.from(context);initWin();}@Overridepublic int getCount() {if (infos != null && infos.size() > 0) {return infos.size();}return 0;}@Overridepublic Object getItem(int position) {if (infos != null && infos.size() > 0) {return infos.get(position);}return null;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {DataHolder holder;if (convertView == null) {convertView = inflater.inflate(R.layout.hot_search_gv_item, null);holder = new DataHolder();holder.iv_image = (ImageView) convertView.findViewById(R.id.iv_image); convertView.setTag(holder);} else {holder = (DataHolder) convertView.getTag();}App mApp = infos.get(position);int pad = (int) (2*density);convertView.setPadding(pad, pad, pad, pad);convertView.setLayoutParams(new AbsListView.LayoutParams(widthPixels/4,widthPixels/4));return convertView;}public final class DataHolder {public ImageView iv_image;}private void initWin(){WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);DisplayMetrics metrics = new DisplayMetrics();manager.getDefaultDisplay().getMetrics(metrics);density = metrics.density;widthPixels = metrics.widthPixels;}private float density;private int widthPixels;}