/**
* 处理窗口控件大小，形状，像素等工具类
*
* @author chen.lin
*
*/
public class UITools {
  /**
  * 把像素转化为dp
  *
  * @param context
  * @param px
  * @return
  */
  public static int px2dip(Context context, float px) {
    float density = context.getResources().getDisplayMetrics().density;
    return (int) (px * density + 0.5f);
  }
  /**
   * 设置窗体的宽度
   * @param context
   */
  public static void setWinWidth(Activity context) {
    DisplayMetrics metric = new DisplayMetrics();
    context.getWindowManager().getDefaultDisplay().getMetrics(metric);
    LayoutParams p = context.getWindow().getAttributes();
    p.width = (int) (metric.widthPixels * 0.8);
    context.getWindow().setAttributes(p);
  }
  /**
   * 设置弹出窗口中listview的高度
   *
   * @param listView
   */
  public static void setListViewHeight(ListView listView) {
    // 获取ListView对应的Adapter
    ListAdapter listAdapter = listView.getAdapter();
    if (listAdapter == null) {
      return;
    }
    int totalHeight = 0;
    for (int i = 0, len = listAdapter.getCount(); i < len; i++) { // listAdapter.getCount()返回数据项的数目
      View listItem = listAdapter.getView(i, null, listView);
      listItem.measure(0, 0); // 计算子项View 的宽高
      totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度
    }
    ViewGroup.LayoutParams params = listView.getLayoutParams();
    params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
    // listView.getDividerHeight()获取子项间分隔符占用的高度
    // params.height最后得到整个ListView完整显示需要的高度
    listView.setLayoutParams(params);
  }
}