Android 如何优雅的获取屏幕的高度和宽度

import android.app.Activity;
import android.util.DisplayMetrics;

public class BaseTools {

	/**
	 * 获取屏幕设备信息描述对象
	 * 
	 * @param activity
	 * @return
	 */
	public final static DisplayMetrics getWindowsDisplayMetrics(
			Activity activity) {
		DisplayMetrics dm = new DisplayMetrics();
		activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
		return dm;
	}

	/**
	 * 获取屏幕的宽度
	 * 
	 * @param activity
	 * @return
	 */
	public final static int getWindowsWidth(Activity activity) {
		return getWindowsDisplayMetrics(activity).widthPixels;
	}

	/**
	 * 获取屏幕的高度
	 * 
	 * @param activity
	 * @return
	 */
	public final static int getWindowsHeight(Activity activity) {
		return getWindowsDisplayMetrics(activity).heightPixels;
	}
}