android Dialog 宽是否占满

WindowManager m = getWindowManager();  
Display d = m.getDefaultDisplay();  //为获得屏幕宽、高  
android.view.WindowManager.LayoutParams p = dialog.getWindow().getAttributes();  //获得对话框当前的参数值  
p.height = (int) (d.getHeight() );   //高度设置为屏幕的
p.width = (int) (d.getWidth());    //宽度设置为屏幕的
dialog.getWindow().setAttributes(p);     //设置生效 WindowManager m = getWindowManager();  
Display d