这些是尺寸。尝试看看支持多种屏幕320dp: a typical phone screen (240x320 ldpi, 320x480 mdpi, 480x800 hdpi, etc).480dp: a tweener tablet like the Streak (480x800 mdpi).600dp: a 7” tablet (600x1024 mdpi).720dp: a 10” tablet (720x1280 mdpi, 800x1280 mdpi, etc).我用它来制作多个布局：res/layout/main_activity.xml # For handsets (smaller than 600dp available width)res/layout-sw600dp/main_activity.xml # For 7” tablets (600dp wide and bigger)res/layout-sw720dp/main_activity.xml # For 10” tablets (720dp wide and bigger)