android中的Display 与 DisplayMetrics

int screenWidth;int screenHeight;float density;//屏幕密度//1、用WindowManager获得屏幕的宽和高WindowManager wn=this.getWindowManager();Display dis= wn.getDefaultDisplay();screenWidth=dis.getWidth();screenHeight=dis.getHeight();//2、用DisplayMetrics获得屏幕的宽和高DisplayMetrics dm=new DisplayMetrics();this.getWindowManager().getDefaultDisplay().getMetrics(dm);screenWidth=dm.widthPixels;screenHeight=dm.heightPixels;density=dm.density;//3DisplayMetrics dmm=this.getResources().getDisplayMetrics();screenWidth=dmm.widthPixels;screenHeight=dmm.heightPixels;density=dmm.density;